Energy-efficient solutions
for LED lighting
STMicroelectronics
www.st.com/led
Contents
ST’s commitment to energy saving ....................................... 4
ST’s LED driver solutions ....................................................... 6
LED application segments ..................................................... 8
LED array drivers .................................................................... 9
STP04CM05...........................................................................................9
STP08xP05...........................................................................................10
STP16C/D - STP1612PW05..................................................................11
STP16PWL05........................................................................................12
STP24DP05..........................................................................................13
Boost converters .................................................................. 14
PM6600................................................................................................14
LED7706/7............................................................................................15
LED7708...............................................................................................16
ST8R00.................................................................................................18
L6920/DB..............................................................................................19
STCF05.................................................................................................20
STLDC08..............................................................................................21
Linear current regulators ..................................................... 22
STCSx...................................................................................................22
Buck converters ................................................................... 23
L6902....................................................................................................23
L597x/A597x.........................................................................................24
L598x....................................................................................................26
L6925D/26/28.......................................................................................28
ST1CC40..............................................................................................29
L798x....................................................................................................30
Buck-boost converters ........................................................ 32
STCF04.................................................................................................32
STCF06.................................................................................................33
STBB1XX..............................................................................................34
High-voltage converters ...................................................... 35
HVLED805............................................................................................35
VIPer®....................................................................................................36
PFC controllers ..................................................................... 38
L6562A/AT............................................................................................38
Resonant and quasi-resonant controllers ........................... 40
L6599A/AT............................................................................................40
L6585DE...............................................................................................41
Microcontrollers .................................................................. 42
STM8....................................................................................................42
STM32..................................................................................................45
Product selection guide ....................................................... 49
Demonstration boards ......................................................... 53
3
ST’s commitment to energy saving
STMicroelectronics follows two
complementary approaches reduction of energy consumption in
the chip itself, and new ways to further
improve energy efficiency in the end
applications, such as lighting.
While technological progress has
improved the quality of our lives, it has
significantly increased global energy
consumption, from 7 billion toe (tonnes
of oil equivalent) in 1980 to 13.6 billion
toe in 2015 (forecast)*. With increasing
levels of greenhouse gases in the
atmosphere and the dwindling of
traditional energy resources, a more
energy-efficient approach is required.
Lighting represents 15% of global
electrical energy consumption, mainly
in buildings and exterior applications.
More efficient lighting thus offers
potentially large savings in energy and
is closely related to the performances
of its control electronics.
STMicroelectronics is committed to
developing products and technologies
that enable efficient solutions, from
generation to consumption, across
all microelectronics applications.
A leading provider of complete lighting
solutions with smart management
and high protection levels,
STMicroelectronics supports energyefficient electronic ballasts with a large
portfolio of products (power discrete
semiconductors, application-specific
ICs and microcontrollers). These ICs
combine all the functions required to
generate more light from less energy,
while ensuring longer lifetime for the
lamps and full compliance with safety
and power consumption regulations.
Light emitting diodes (LEDs), thanks
to their numerous advantages, are set
to become a new standard source of
illumination for the 21st century.
HB LED market forecast 2009-2014
Source: strategies unlimited
Market size ($ million)
25.000
20.000
x 3.6
15.000
10.000
5.000
0
2009
2010
Mobile appliances
Note:
* Based on EIA: International Energy Outlook 2010 report #: DOE/EIA-0484(2010)
4
2011
Signals
2012
Displays
Automotive
2013
Lighting
2014
Other
LEDs are essentially PN junction semiconductor diodes that emit a monochromatic (single color) light when operated in a
forward biased direction. The basic structure of a LED consists of the die or light emitting semiconductor material, a lead frame
where the die is actually placed, and the encapsulation epoxy which surrounds and protects the die. The first commercially
usable LEDs were developed in the 1960’s, but they have only recently reached significant levels of luminous efficiency.
Evolution of lighting
200
Luminous efficiency (lm/W)
150
Electrical discharge lamps
High-pressure
Sodium
Metal halide
Light emitting diodes
100
Best LED
Fluorescent
Mercury vapor
50
Shaped reflectors
White LEDs
Tungsten-halogen
Incandescents
Conventional incandescent
0
1920
1940
1960
1980
2000
2020
Year
LEDs offer longer lifetimes (up
to 100,000 hours), a wide color
spectrum, small size and greater
design flexibility. Moreover, LEDs
increase safety through their lowvoltage power supplies, and enhance
user comfort as they turn on instantly
and operate silently. LEDs are
environment friendly because they
have no gas inside, no UV and little
infrared emission.
electricity equivalent to 23.4 Gtonne of
CO2 a year.
Most importantly, LEDs can save a
lot of energy compared with standard
lighting sources. It has been estimated
that the replacement of 5% of all
incandescent bulbs in the world (12.5
billion/year) with LED-based lighting
would allow the saving of 60 TWh of
STMicroelectronics offers a large
portfolio of compact and efficient LED
driver solutions, fully addressing the
lighting market and featuring all the
functions needed to ensure greater
power saving.
5
ST’s LED driver solutions
Low input voltage solutions: buck, boost, buck-boost, linear current regulators and LED array drivers
Input voltage [Vdc]
55 V
L497x
STCSx
36 V
STP16PWL05
L6902
LED770x
L597x/A597x
L798x
PM6600
18 V
L598x
ST1CC40
6V
ST8R00
STPIC6x595
STP08xP05
STCF05
STP16C/D
STP1612PW05
0
Legend:
Buck converter
6
STCF0x
L6925D/6/8
STP04CM05
STP24DP05
STBB1XX
L6920/DB
STLDC08
100
150
Boost converter
200
350
500
700
LED current [mA]
Buck-boost converter
LED array driver
1000
Linear current regulator
3000
4000
Offline LED drivers: 85 to 265 Vac input voltage
Output power [W]
L6562A/AT (PFC-boost converter)
+ L6599A/AT (LLC resonant converter)
+ DC-DC converter for each LED string
100
L6562A/AT (PFC-boost converter)
+ L6562A/AT (modified buck converter)
L6585DE (PFC boost + LLC resonant converter)
+ DC-DC converter for each LED string
L6562A/AT/3X/4 (HPF) + DC-DC converter for each LED string
25
L6562A/AT (modified buck/buck-boost converter)
VIPER53-E (buck converter)
VIPER22A-E/25/27/53-E (flyback converter) + TSM10x/SEA05
10
VIPERx2A-E/VIPERx7 (flyback converter) + TSM10x/SEA05
HVLED805 (quasi-resonant ZVS flyback
converter with primary sensing)
VIPER12A-E/15/17 (flyback converter) + TSM10x/SEA05
VIPERx2A-E / VIPERx6 (buck converter)
Non-isolated
Isolated
7
Displays and signs
QQ
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Full color video
Monochrome message boards
Variable message signs
Transportation
Information
STP04CM05, STP08xP05, STP16C/D, STP1612PW05, STP24DP05
General illumination
QQ
QQ
QQ
QQ
QQ
Residential lighting
Commercial lighting
Architectural and decorative lighting
Street lighting and public Illumination
Emergency lighting
HVLED805, VIPer, L6562A/AT, L6599A/AT, L6585DE, STP04CM05, ST1CC40x,
STCSx, L597x, L598x, L497x, L6902, L798x
LCD backlighting
QQ
QQ
LED
application
segments
QQ
QQ
QQ
LED TVs
PC monitors
Notebooks
Netbooks
Mid- to large-sized LCDs
LED7706/07/08, PM6600, STP16PWL05
Mobile appliances and DSC flash lighting
QQ
QQ
QQ
QQ
QQ
Smartphones
MP3/PMP
Video game consoles
Auto navigation/GPS
Digital still cameras
STLDC08, ST8R00, L6920/DB, L6925D/26/28, ST1CC40, STCF04, STCF06,
STBB1XX
Traffic signals
QQ
QQ
QQ
QQ
QQ
Road traffic signals
Aviation
Rail
Navigation
Emergency/police signals
STP08DP05, STP16C/D, STP1612PW05, STP24DP05, LED7706/07
Automotive
QQ
QQ
QQ
Interior lighting
Exterior lighting
Infotainment display backlighting
A597xD/AD, A6902D, LED7706/07, STCSx, STP08xP05, STP16C/D, STPIC6x595
8
LED array drivers
STP04CM05
The STP04CM05 is a high-power LED driver and 4-bit shift register designed for
power LED applications. The STP04CM05 contains a 4-bit serial in, parallel out
shift register that feeds a 4-bit D-type storage register. In the output stage, four
regulated current sources are designed to provide 80 to 400 mA constant current
to drive the high powered LEDs.
DIP-14
The STP04CM05 family guarantees 20 V output driving capability, allowing users
to connect more LEDs in series. The high clock frequency, 30 MHz, also satisfies
the system requirements which include high-volume data transmission. The
STP04CM05 is well suited for very high brightness displays and special lighting
applications. The STP04CM05 is offered in DIP-14, SO-14 and TSSOP16 exposed
pad packages.
Key features
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SO-14
TSSOP-16
(Exposed pad)
Key benefits
4 constant-current output channels
Adjustable output current (80 to 400 mA) using a single external resistor
20 V of output driving capability
Serial data in/parallel data out
Output enable pin for dimming (PWM)
Maximum clock frequency: 30 MHz
ESD protection: 2.5 kV HBM, 200 V MM
QQ
QQ
QQ
Thermal shutdown, output off when
junction temperature exceeds limit
Well suited for very high-brightness
displays and special lighting
applications
Uniform and accurate current
control in a single-chip solution
Application example
VL
VDD = 3.3 to 5 V
Vo = 0.3 to 1.4 V
OUT0
OUT1
R-EXT
OUT2
OUT3
STP04CM05
OE
f = 0 to 100 kHz
Sales code
Board
Description
STEVAL-ILL009V3
OSTAR projection module
STEVAL-ILL009V4
OSRAM Dragon LED module
STEVAL-ILL009V5
New RGB LED control board
Technical documents
AN2531: Generating multicolor light
using RGB LEDs
9
STP08xP05
The STP08xP05 series are monolithic, low-voltage, low-current, low-power LED
drivers and 8-bit shift registers designed for LED panel displays. The STP08xP05
contains an 8-bit serial-in, parallel-out shift register that feeds an 8-bit D-type
storage register. In the output stage, eight regulated current sources provide 5 to
100 mA constant current to drive the LEDs.
DIP-16
SO-16
Users can adjust LED brightness using an external resistor to control the output
current or using a dedicated digital pin.
The STP08DP05 contains a built-in error-detection feature. This additional function
is achieved without any increase in the pin number and any change in the pin
functions compared to a standard device without error detection.
Key features
QQ
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TSSOP-16
TSSOP-16
(Exposed pad)
Key benefits
Low-voltage power supply: down to 3 V
8 constant-current output channels
Adjustable output current through external resistor
Serial data in/parallel data out
3.3 V microcontroller driveable
Output current: 5 to 100 mA
Maximum clock frequency: 30 MHz
ESD protection: 2.5 kV HBM, 200 V MM
Extended thermal range and protection with wide package portfolio
QQ
QQ
QQ
QQ
Uniform and accurate current
control in a single-chip solution
Common footprint design
Thermal shutdown, output off when
junction temperature exceeds limit
Available and combinable features
such as:
QQ high precision
QQ full error detection
Application example
VL
VDD = 3.3 to 5 V
Vo = 0.3 to 1.5 V
OUT0
R-EXT
OUT1
OUT2
OUT3
STP08xP05
OUT7
OE
f = 0 to 100 kHz
Sales code
STEVAL-ILL002V3
STEVAL-ILL002V4
10
Board
Description
High-brightness LED with diagnostics (40 LEDs)
High-brightness LED with diagnostics (40 LEDs)
Technical documents
UM0181: Detection LED matrix
evaluation kit
AN2478: STP08DP05, STP16DP05
Normal mode and error detection
features
STP16C/D - STP1612PW05
The STP16x series are monolithic, low-voltage, low-current, low-power LED
drivers and 16-bit shift registers designed for LED panel displays. The STP16x
contains a 16-bit serial-in, parallel-out shift register that feeds a 16-bit D-type
storage register. In the output stage, sixteen regulated current sources provide
from 3 mA to 100 mA constant current to drive the LEDs.
QSOP24
The STP1612PW05 has an individually adjustable PWM brightness control for
each output channel. The PWM counters are selectable via a serial interface
with 4096 or 65536 steps (12 or 16 bits). It also provides enhanced pulse-width
modulation counting algorithms called e-PWM to reduce flickering effects (ghost
visual effects), so improving the overall image quality. The device features 8-bit gain
(256 steps) for global LED brightness adjustment with two selectable ranges.
Key features
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TSSOP24
SO-24
TSSOP24
(Exposed pad)
Key benefits
Supply voltage: 3.3 or 5 V
16 constant-current output channels
Adjustable output current through
external resistor
Serial data in/parallel data out
3.3 V microcontroller driveable
Programmable progressive
output delay
Thermal protection and thermal flag
Maximum clock frequency: 30 MHz
ESD protection:
2.5 kV HBM, 200 V MM
Extended thermal range and
protection with wide package
portfolio
QQ
QQ
QQ
QQ
QQ
Thermal shutdown, output off when junction temperature exceeds limit
Uniform and accurate current control in a single-chip solution
Common footprint design
Available and combinable features such as:
QQ high precision
QQ full error detection via SPI
QQ auto power saving
QQ balanced turn on/off
Available and combinable features such as:
QQ enhanced PWM for reduced flickering effects (STP1612PW05)
QQ SPI programming with dual-size 16-bit or 256-bit shift register
(STP1612PW05)
QQ 8-bit current gain control by means of 256 steps in two selectable ranges
(STP1612PW05)
Application example
VL
VL
VDD = 3 to 5 V
Vo = 0.3 to 1.5 V
Control
unit
Sales code
OUT0 OUT1 OUT2 OUT3 OUT15
PWMCLK
STP1612PW05
CLK
LE
GND
SDI
R-EXT
Board
Vo = 0.3
to 1.5 V
SDO
VDD = 3 to 5 V
OUT0
SDI
OUT1
OUT2
OUT3
OUT15
SDO
STP1612PW05
R-EXT
Description
GND
Technical documents
STEVAL-ILL003V2
High-brightness LED driver without diagnostics (32 LEDs) based on STP16CP05
AN2141: LED array reference
design board
STEVAL-ILL024V1
STEVAL-ILL025V1
Master/slave board for LED display based on STM32 microcontroller
LED matrix display panel based on STP16DP05
UM0767: STEVAL-ILL024V1 and
STEVAL-ILL025V1 demonstration boards
based on the STP16DP05 LED matrix
driver and STM32F103VB
STEVAL-ILL028V1
RGB LED driver for color displays and backlighting based on the STP1612PW05
and STM32
UM0882: STEVAL-ILL028V1 LED dimmer
board using STP1612PW05 and STM32
UM0885: Multilayer C library used to drive
STP1612PW05 on the systems with SPI
11
STP16PWL05
The STP16PWL05 is a 16-channel, constant-current LED driver designed for
display backlighting.
Each channel can be programmed using external resistors at two different current
sink levels.
The device is configured through a serial interface to support basic dimming current
techniques (PWM) by using a 12/16-bit gray-scale. It is also able to support different
error detection modes, providing the results externally through the serial interface.
The device is capable of providing a master brightness control through a current
gain adjust (CGA), with two selectable ranges available. The STP16PWL05 can
synchronize or be synchronized to other similar devices by using the dedicated pin.
Key features
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VFQFPN-32 5x5
Key benefits
16 low-side programmable channels
Up to 85 mA per channel current capability
Parallelable channels for higher LED current
±3% channel current accuracy
±1.5% channel-to-channel current matching
Programmable off-state (bias) channel current
External SMPS control (adaptive LED supply voltage) for higher efficiency
4-wire, 30 MHz serial interface
2/16-bit gray-scale (PWM) brightness control for local dimming
Grouped or independent PWM channel control
Programmable gray-scale latency
Master/slave chain configuration supported
QQ
QQ
QQ
QQ
Compact and flexible solution
High efficiency
Superior dimming capability
Complete and flexible fault
management
Application example
VIN
DC-DC
converter
VDD
External SMPS
control
VLED
1
4-wires SI
Gray-scale
clock
STP16PWL05
STEVAL-ILL036V1
12
Board
16
40 V rated
channels
ILED
Sales code
up to
85 mA
Current generators and
dimming control
Description
Multi-channel LED driver with external DC-DC feedback control for medium/
large LCD panel backlights based on STP16PWL05 and STM32F103C6T6
Technical documents
STP24DP05
The STP24DP05 is a monolithic, low-voltage, low-current LED driver and 24-bit
shift register designed for LED panel displays. The device contains an 8 x 3-bit
serial-in, parallel-out shift register that feeds an 8 x 3-bit D-type storage register.
In the output stage, 24 regulated current sources provide 5 to 80 mA constant
current to drive the LEDs. The 8 x 3 shift register data flow sequence can be
managed with two dedicated pins.
Users can adjust the output current for each 8-channel group using three external
resistors, controlling in this way the light intensity of the LEDs.
TQFP48-EP
The STP24DP05 guarantees a 20 V output driving capability, allowing users to
connect more LEDs in series.
The high clock frequency, 25 MHz, makes the device suitable for high data rate
transmission. The 3.3 V voltage supply is useful for applications that interface any
microcontroller from 3.3 V.
Key features
QQ
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QQ
Key benefits
Low-voltage power supply: down to 3 V
3 x 8 constant-current output channels
Adjustable output current through external resistor
Serial data in/parallel data out
3.3 V microcontroller driveable
Output current: 5 to 80 mA
Maximum clock frequency: 25 MHz
ESD protection: 2.5 kV HBM, 200 V MM
QQ
QQ
QQ
QQ
Thermal shutdown, output off when
junction temperature exceeds limit
Uniform and accurate current
control in a single-chip solution
Full error detection via SPI
and flag pin
Available and combinable features
such as:
QQ high precision
QQ full error detection
QQ auto power saving
Application example
Vdd Vdd
SIN
GF
TF
CLK
LE
DM
Controller
DG
DFO
DF1
OE-RNDM
OE-G
OE-B
SOUT
VLED
R1
SDI
BF
TF
CLK
LE
DM
DS
DFO
DF1
OE-RNDM
OE-G
OE-B
REXTR
Sales code
Board
VLED
R1
G1
VLED
G1
B1
VLED
B1
Vdd
IG_0
Vdd
+
GND
STP24DP05
REXTG
SDD
REXTB
R1
SDI
BF
TF
CLK
LE
DM
DS
DFO
DF1
OE-RNDM
OE-G
OE-B
REXTR
VLED
R1
G1
VLED
G1
B1
B1
Vdd
Vdd
+
Vdd
IG_0
Vdd
GND
STP24DP05
EF
TF
SDD
REXTG
Description
REXTB
Technical documents
AN2841: LED dimming implemented on
STM32 microcontroller
STEVAL-ILL015V1
High-brightness RGB LED array with LED error detection
UM0574: LED dimmer demonstration
board based on the STP24DP05 and
STM32
UM0588: Multilayer C library for LED
dimming used on systems with SPI and
DMA capabilities
STEVAL-ILL032V1
STEVAL-ILL033V1
Multicolor LED matrix demo based on STP24DP05BTR
Master/slave unit for multicolor LED matrix demo based on STM32F103VET6
13
Boost converters
PM6600
The PM6600 consists of a high-efficiency monolithic boost converter and six
controlled current generators (rows), specifically designed to supply LED arrays
used in mobile PC LCD-panel backlighting. The device can manage a nominal
output voltage up to 36 V (i.e. 10 white LEDs per row). The generators can be
externally programmed to sink up to 32 mA and they can be dimmed via a PWM
signal (1% dimming duty cycle at 20 kHz can be managed). The device detects
and manages open and shorted LED faults and leaves unused rows floating.
Basic protection (output overvoltage, internal MOSFET overcurrent and thermal
shutdown) is provided.
Key features
QQ
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QQ
QQ
QQ
VFQFPN-24
Key benefits
6 rows with up to 10 LEDs per row (60 LEDs)
Monolithic solution up to 36 V output voltage
Up to 1 MHz FSW and high efficiency at light load
Programmable LED current up to 32 mA at highest precision/matching accuracy
Supports analog and digital dimming
QQ
QQ
QQ
Supports wide range of screen sizes
from small netbooks to wide-screen
notebooks with one device
High integration, so few and small
(cheap) external components
Outstanding efficiency for longer
battery life and energy saving
Application example
VIN
3.3 V/4.5 V up to 28 V
VOUT
up to 36 V
Boost
control
EN
LDO
MODE
FAULT
Fault
management
DIM
Sales code
STEVAL-ISA056V1
14
Board
Row
control
RILIM
Description
6-row, 30 mA LED driver with boost converter for notebook PC LCD-panel backlighting
LED7706/7
The LED7706/7 consists of a high-efficiency monolithic boost converter and six
controlled-current generators (rows) specifically designed to supply LED arrays
used in the backlighting of LCD panels. The device can manage an output voltage
up to 36 V (i.e. 10 white LEDs per row).
The generators can be externally programmed to sink up to 85 mA (LED7707)
and can be dimmed via a PWM signal. The device detects and manages open
and shorted LED faults and leaves unused rows floating. Basic protection (output
overvoltage, internal MOSFET overcurrent and thermal shutdown) is provided.
Key features
Key benefits
Backlight driver section
Boost section
QQ
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VFQFPN-24 4x4
Input voltage range: 4.5 to 36 V
Internal power MOSFET
Up to 93% efficiency
Up to 36 V output voltage
Switching frequency:
200 kHz to 1 MHz
Programmable soft-start,
OVP and OCP
External sync for multi-device
applications
QQ
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Six rows capable of driving multiple
LEDs in series
Up to 85 mA (LED7707) and 30 mA
(LED7706) programmable
output-current per row
Rows in parallel to drive
up to 510 mA LEDs (LED7707)
±1.5% current matching
between rows
Shorted and open LED fault
detection
PWM dimming (500 ns minimum
dimming on-time LED7706)
QQ
QQ
QQ
Monolithic and flexible solution
High efficiency
Superior dimming capability
Complete and flexible fault
management
Application example
L
VIN
Slope compensation
OVP selection
MLCC
VOUT
Switching frequency selection
+5 V
LDOS
Internal MOSFET OCP
Row current selection
AVCC
VIN
LX
SLOPE
OVSEL
SWF
BILIM
ROW2
RILIM
ROW3
LED7707
SS
ROW4
COMP
ROW5
SGND
DIM
Dimming
Fault
Enable
Sales code
ROW1
FAULT
EN
SYNC
MODE
PGND
ROW6
Fault management selection
Sync output
Board
Description
Up to 10 WLEDs per row
Technical documents
STEVAL-ILL020V1
LCD panel backlight demoboard based on LED7706
(6-row, 30 mA LED driver with boost converter)
AN2809: 6-row, 30 mA LED driver with
boost converter for the backlight of LCD
panels
STEVAL-ILL021V1
LCD panel backlight demoboard based on LED7707
(6-row, 85 mA LED driver with boost converter)
AN2810: 6-row 85 mA LED driver
with boost converter for LCD panel
backlighting
15
LED7708
The LED7708 has been specifically designed to supply several LEDs starting from
a single low-voltage rail in order to address TV and monitor backlight, medium and
large size LCD panel backlight and RGB/RGGB backlight applications.
It integrates a boost controller, sixteen current generators and a 4-wire serial
interface.
The boost controller regulates the output voltage in an adaptive way according to
the LED’s need, resulting in improved overall efficiency. All the current generators
are 40 V rated, allowing the LED7708 to drive several LEDs in series on each
channel. The channels can be put in parallel for higher output current. The
brightness of the LEDs is controlled by using the serial interface. A selectable 12-bit
or 16-bit gray-scale brightness control allows independent PWM on each channel.
A programmable on-chip dimming oscillator is provided for external circuitry
simplification. The device has dedicated pins to lock synchronize with other
devices (master or slave) for noise reduction in multi-device applications.
VFQFPN-48 7x7
The LED7708 implements basic protection (OVP, OCP and thermal shutdown), as
well as LED-array protection. It can detect and manage open-LED and shortedLED faults and different fault management options are available in order to cover
most application needs.
Key features
Boost controller section
QQ
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16
Input voltage range (LDO):
3.6 to 36 V
Adaptive output voltage for high
efficiency
Internal +5 V LDO for gate driver
supply
Internal +3.3 V LDO for device
supply
High-performance external
MOSFET driver
Switching frequency:
250 kHz to 1 MHz
Programmable OV and OC
protection
Fixed-frequency peak current mode
control
External synchronization for
multi-device applications
Over-temperature alert and thermal
shutdown
Key benefits
LED array driver section
QQ
QQ
QQ
QQ
QQ
QQ
QQ
QQ
QQ
QQ
QQ
16 channels with 85 mA/ch current
capability
Channel current accuracy: ±3%
±1.5% max channel-to-channel
current matching
LED short-circuit and open-channel
fault detection and management
4-wire, 30 MHz serial interface
Serial data formats: 16 x 16 bits,
1 x 256 bits or 1 x 192 bits
Grouped or independent channel
PWM control
Selectable 12/16-bit gray-scale
brightness control for local dimming
Programmable internal dimming
oscillator
Programmable gray-scale latency
Master/slave chain configuration
supported
QQ
QQ
QQ
QQ
Flexible solution
High efficiency
Superior brightness control
Complete and smart fault
management
Application example
VIN
GATE
PGND
CSNS
VFB
SLOPE
CH1
VIN
DIN
DOUT
CH2
DCLK
LE
Host
controller
XFLT
CH15
GSSY
LED7708
GSCK
CH16
LREN
COMP
XOVF
VMIN
XMSK
SGND
IOK
VSI
XVOK
FSW
SYNC
ISETL
AGND
LDO3
Sales code
STEVAL-ILL035V1
Board
To slave
devices
(optional)
VDR
ISETH
CLIM
FOSC
Description
Technical documents
Multi-channel LED driver with integrated boost controller for medium/large LCD
panel backlight based on LED7708 and STM32F103C6T6
17
ST8R00
The ST8R00 family of synchronous step-up DC-DC converters with current output
cut-off function provides up to 1 A over an input voltage range of 4 to 6 V and an
output voltage range of 6 to 12 V.
The high switching frequency (1.2 MHz) allows the use of tiny surface-mount
components.
In addition to the resistor divider to set the output voltage value, only an inductor
and two capacitors are required. A low output ripple is guaranteed by the currentmode PWM topology and by the use of low ESR surface-mounted ceramic
capacitors.
DFN 4x4 mm
The device is available in two versions: burst mode (ST8R00) and continuous mode
(ST8R00W) operation.
Key features
QQ
QQ
QQ
QQ
QQ
Key benefits
Very low supply current: 500 μA (typ)
Output voltage: adjustable from 6 to 12 V
Output voltage accuracy: ±2%
Output current: up to 1 A
Very small DFN8 (4x4 mm) package
QQ
QQ
Efficiency up to 90%
Only a few external components
Application example
VI
IN
LX
OUT
INH
ST8R00
FB
GND
Sales code
steval-isa48v2
18
Board
PGND
Description
1 A/adjustable Vout PWM synchronous step-up DC-DC converter based on
ST8R00
Technical documents
AN2627: ST8R00 synchronous boost
converter with output current cut-off
function
L6920/DB
The L6920/DB is a high-efficiency monolithic step-up switching converter IC
specifically designed for battery-powered applications. The MSOP8 package
minimizes PCB space. It requires only three external components to convert the
battery voltage to the selected output voltage. The minimum output voltage is 1.8
V, suitable to supply the most advanced ASICs and microprocessors.
High switching frequency allows for a low-profile, small-sized inductor and output
capacitor to be used.
MSOP8
Reference voltage, low-battery detection and shutdown are provided together with
overcurrent protection.
Key features
QQ
QQ
QQ
QQ
QQ
QQ
Key benefits
0.8 V start-up input voltage
Input voltage: up to 5.5 V
Internal synchronous rectifier
Adjustable output voltage: from 1.8 V (L6920DB)
Low battery voltage detection
750 mA input current limit (L6920DB) (1 A for L6920)
QQ
QQ
Monolithic and flexible solution
High efficiency
Application example
LX
+
SHDN
LBI
BT 3 V
REF
7
8
5
1
2
4
L6920
3
6
OUT
FB
+
LBO
GND
-
+
Sales code
Board
Description
Technical documents
EVAL6920DB1
L6920DB synchronous rectification step-up converter evaluation board
AN2206: Designing with L6920DB, high
efficiency syncronous rectifier step-up
converter
STEVAL-ILL008V1
LED flashlight demo board based on the L6920D
Previous sales code: PSAL05-13
AN1941: Low-voltage LED driver using
L6920D, L4971 and L6902D
19
STCF05
The STCF05 is a high-efficiency power supply solution to drive multiple flash LEDs
in camera phones, PDAs and other handheld devices.
The synchronous boost topology with output current control guarantees the
correct LED current over all possible conditions of battery level and LED forward
voltage.
TFBGA25
(3 x 3 mm)
All the functions of the device are controlled through the I C bus that allows to
reduce logic pins on the package and to save PCB traces on the board.
2
Key features
QQ
QQ
QQ
QQ
QQ
QQ
QQ
Key benefits
1.8 MHz fixed frequency PWM control
Efficiency up to 92%
Full I2C control
LED over-temperature detection and protection with external NTC resistor
Open and shorted LED failure detection and protection
Chip over-temperature detection and protection
Less than 1 μA standby current
Only a few external components
required
QQ
Application example
VI
GATE
AUX LED
(red)
PGND
AUXL
VOUT
Power
white
LEDs
TRIG
Microprocessor
I/Os
ATN
STCF05
TMSK
LED
SLC
I²C
bus
AGND
SDA
ADD
PGND
PGND
RX
NTC
Vref
Rx
NTC
To optional
A/D converter
Sales code
STEVAL-TLL007V1
20
Board
VI
Description
Power flash demo board based on STCF05 (includes motherboard based on
µPSD)
Technical documents
AN2827: Driver for double flash LED with
I2C interface
STLDC08
The STLDC08 LED driver step-up controller is optimized to operate from one
or two NiCd/NiMH or alkaline cells. The IC is able to drive an external MOSFET
(N-channel) enabling it for use with wide power levels. Hysteretic control eliminates
the need for small signal control loop compensation. The IC integrates an FET
driver for a precise PWM dimming. STLDC08 comes in a DFN10 (3 x 3 mm)
package.
Key features
QQ
QQ
QQ
QQ
QQ
QQ
DNF10L (3 x 3 mm)
Key benefits
Minimum input voltage range: 0.8 to 3.6 V
20 V overvoltage protection
Drives N-channel MOSFET or NPN bipolar transistor
No control loop compensation required
FET driver for very precise PWM dimming
Operates also using RDS(on) as sense resistor
QQ
QQ
QQ
QQ
Flexible solution to cover different
power levels
Minimized number of external
components for compact solutions
High efficiency
Brightness control using inhibit pin
Application example
+
Vbat
-
VCC
EN/PWM
V5
DRV
STLDC08
2VCC
GND
SENSE
VOUT
PWMOUT
FB
21
Linear current regulators
STCSx
The STCSx family is a BiCMOS constant-current source designed to provide a
precise constant current starting from a varying input voltage source. It is designed
to replace discrete-component LED driving solutions in low-voltage applications
including 5 V supplies, 12 V or 24 V, providing benefits in terms of precision,
integration and reliability.
PowerSO-8
An external resistor is used to set the current up to 2 A with a ± 10 % precision; a
dedicated pin can be used for PWM dimming. An open-drain pin output provides
information on load disconnection conditions.
DNF8 (3x3)
Key features
QQ
QQ
QQ
QQ
PowerSO-10
Key benefits
Adjustable current set from 0.1 A to 2.0 A (STCS2/A), 1.5 A (STCS1/A),
500 mA (STCS05/A)
Adjustable turn-on ramp-up from 10 μs to 10 ms, set with external capacitor to
reduce the EMI noise
Microprocessor-compatible dimming input that turns the LED current on/off
MLP-8L 3x3 mm and PowerSO8 (STCS1), SO8 (STCS05),
PowerSO10 (STCS2)
QQ
QQ
QQ
Supports wide range of screen sizes
from small netbooks to wide-screen
notebooks with one device
High integration, so only a few and
small (cheap) external components
Outstanding efficiency for longer
battery life and energy saving
Application example
Input voltage
4.5 V to 40 V
VCC
PWM
DRAIN
STCSx
EN
DISC SLOPE GND
Load disconnection
Sales code
Board
FB
Description
Technical documents
STEVAL-ILL014V1
Constant-current controller for high-brightness LEDs based on STCS1A
UM0422: Constant current controller for
high brightness LEDs
STEVAL-ILL030V1
LED lighting control using DMX512 control based on STM32F102C6T6 and
STCS1APHR
UM1004: DMX512-based LED lighting
solution
22
Buck converters
L6902
The L6902 is a complete and simple step-down switching regulator with adjustable
current limit.
Based on a voltage-mode structure, it integrates a current error amplifier for
constant-voltage and constant-current control.
Key features
QQ
QQ
QQ
QQ
QQ
QQ
SO-8
Key benefits
1 A in small SO8 package with minimum external component count
P-channel power MOSFET: no bootstrap capacitor
Wide input voltage range: 8 to 36 V
Adjustable LED current (VCS+ - VCS- = 100 mV)
High switching frequency: 250 kHz
External VREF available
QQ
QQ
QQ
QQ
QQ
Monolithic and flexible solution
High efficiency
Low power dissipation
OVP available
Dimming capability
Application example
VIN = 8 V to 36 V
VCC
GND
8
1
2
L6902
7
3
4
COMP
OUT
CS+
CS-
5
FB
VSENSE
Dimming input
Sales code
Board
Description
Technical documents
AN2129: Dimming of super
high-brightness LEDs with L6902D
STEVAL-ILL010V1
High-intensity LED dimming driver based on L6902
AN1941: Low Voltage LED Driver Using
L6920D, L4971 and L6902D
AN1891: Application ideas: driving LEDs
using L497x, L597x, L692x DC-DC
converters families
23
L597x/A597x
The L597x/A597x series of step-down monolithic power switching regulators is
capable of delivering up to 3 A DC current to the load depending on the application
conditions. The output voltage can be set from 1.235 V to 35 V.
The devices use an internal P-channel D-MOSFET (with a typical RDS(on) of 250 mΩ)
as switching element to minimize the size of the external components. An internal
oscillator fixes the switching frequency at 250 kHz.
SO-8
Having a minimum input voltage of 4.4 V only, it is particularly suitable for 5 V
buses, available in all computer related applications.
HSOP-8
Pulse-by-pulse current limit with the internal frequency modulation offers an
effective constant-current short-circuit protection.
Key features
QQ
QQ
QQ
QQ
QQ
QQ
QQ
Key benefits
Up to 3 A output current
P-channel power MOSFET: no bootstrap capacitor
Wide input voltage range: 4.4 to 36 V
High switching frequency: 250 kHz/500 kHz, sync up to 700 kHz
Inhibit pin
Embedded protection features
Automotive grade available (A597x)
QQ
QQ
QQ
QQ
QQ
Standard dimming capability
Monolithic and flexible topology
solutions
Wide input voltage range
compatible with MR16 standard
High efficiency
Low power dissipation
Application example
VIN = 4.4 V to 36 V
VCC
INH
GND
8
3
7
1
6
L5973D
2
SYNCH
4
5
OUT
VREF
FB
COMP
VSENSE
Conventional buck topology
VIN = 4.4 V to 36 V
VCC
INH
GND
8
3
7
1
4
COMP
Cout
6 VREF
L5973D
2
SYNCH
OUT
5
FB
+
-
Conventional buck topology with external op-amp reducing power losses
24
VSENSE
Application example
VIN
VCC
8
INH
1
3
GND
6
L5973D
7
2
SYNCH
VOUT
OUT
VREF
∆VS
+
4
5
FB
COMP
Inverting buck-boost topology
VIN = 4.4 V to 36 V
VCC
INH
GND
8
1
3
6
L5973D
7
2
SYNCH
4
5
OUT
VOUT
VREF
FB
COMP
VSENSE
Positive buck-boost topology
VCC
8
SYNCH 2
6
L5973D
1
OUT
4
3
INH
7
5
COMP
VREF
FB
GND
Floating boost
Sales code
Board
Description
Technical documents
EVAL5970D
L5970D up to 1 A step-down swtching regulator evaluation board
AN1330: Designing with the L5970D 1 A
high-efficiency DC-DC converter
EVAL5972D
L5972D up to 2 A step-down switching regulator evaluation board
AN1517: Designing with the L5972D
high-efficiency DC-DC converter
EVAL5973D
L5973D up to 2.5 A step-down switching regulator evaluation board
AN1518: Designing with the
2.5 A DC-DC converter L5973D
EVAL5973AD
L5973AD 2 A step-down switching regulator evaluation board
AN1723: Designing with L5973AD high
efficiency DC-DC converter
25
L598x
The L598x series of step-down switching regulators with embedded power
MOSFETs can deliver up to 3 A to the load depending on the application
conditions.
The input voltage can range from 2.9 V to 18 V. Only requiring a minimum of
external components, the devices include an internal 250 kHz switching-frequency
oscillator that can be externally adjusted up to 1 MHz.
Key features
QQ
QQ
QQ
QQ
QQ
QQ
QQ
QQ
HSOP8
exposed pad
DNF8 (3x3)
Key benefits
Up to 3 A in small QFN3x3-8L package with minimum external component
count
P-channel power MOSFET: no bootstrap capacitor
Wide input voltage range: 2.9 to 18 V
High switching frequency: 250 kHz, adjustable up to 1 MHz, with
synchronization capability (180° out of phase)
Internal soft-start
Inhibit pin
Suitable for MLCC output filter
Typ RDS(on) = 140 mΩ
QQ
QQ
QQ
QQ
Monolithic and flexible topology
solutions
Low power dissipation
High efficiency
Compact applications
Application example
VIN = 2.9 V to 18 V
VCC
INH
GND
8
1
3
6
L598x
7
2
SYNCH
4
5
OUT
FSW
FB
COMP
VSENSE
PWM DIM
Conventional buck topology
VIN = 2.9 V to 18 V
VCC
INH
GND
8
1
3
6
L598x
7
2
SYNCH
4
COMP
5
OUT
FSW
FB
+
-
Conventional buck topology with external op-amp reducing power losses
26
VSENSE
PWM DIM
Application example
VIN = Vin + |Vout| 94 %
1 A output current capability
Shutdown current < 1 μA
QQ
QQ
Minimum number of external
components
MHz frequency allows the use of tiny
external components
Application example
VIN
VIN
SW1
SW2
VINA
EN
STBB1XX
MODE/SYN
GND PGND
34
VOUT
VOUT
FB
LED
High-voltage converters
HVLED805
The HVLED805 is a high-voltage primary switcher intended for direct operation
from the rectified mains with minimized external parts to provide an efficient,
compact and cost-effective solution for LED driving. It combines a highperformance, low-voltage PWM controller chip and an 800 V, avalanche-rugged
power MOSFET in the same package.
The PWM is a current-mode controller IC specifically designed for ZVS (zero
voltage switching) flyback LED drivers, with constant output current (CC) regulation
using primary sensing feedback. This eliminates the need for the optocoupler, the
secondary voltage reference, and the current sense on the secondary side, still
maintaining a good LED current accuracy. Moreover, it guarantees safe operation
when a short circuit of one or more LEDs occurs.
SO-16N
In addition, the device can also provide a constant output voltage regulation (CV):
it allows the application able to work safely when the LED string opens due to a
failure.
Key features
QQ
QQ
QQ
QQ
QQ
QQ
QQ
QQ
Key benefits
5% accuracy on constant LED output current with primary control
Optocoupler not needed
800 V avalanche-rugged internal power MOSFET
Quasi-resonant zero voltage switching (ZVS) operation
Internal high-voltage start-up
Safe against open or shorted LED string
Automatic self supply
Input voltage feed-forward for mains independent constant-current regulation
QQ
QQ
QQ
QQ
Accurate primary current control
avoids the use of secondary
sensing, reducing costs and
complexity
Internal power MOSFET
high-voltage start-up allows
compact applications
Zero voltage switching improves
efficiency
Reduced external part count allows
very small form factors
Application example
AC
Snubber
HVLED805
HV start-up
and supply logic
PWM
controller
Sales code
Board
Description
EVALHVLED805
4.2 W off-line LED driver with primary side regulation
STEVAL-ILL037V1
3.2 W LED power supply based on HVLED805
Technical documents
35
VIPer®
ST’s VIPer series of offline switch-mode power supplies combines an optimized,
high-voltage, vertical power MOSFET with state-of-the-art PWM circuitry. The
result is a truly innovative offline LED SMPS solution that is simpler, quicker, less
expensive and able to address low-power, high-efficiency applications delivering
up to 14 W with a universal input voltage range.
Fully compliant with eco standards, the VIPer series includes the VIPERx2
family and the new VIPerPlus family, with the subfamilies VIPERx7, VIPERx6 and
VIPERx5, offering new functionalities as well as higher performance with lower
component count.
SO-16
Both the output voltage and current can be regulated by using a bipolar-based
circuitry in non-isolated applications or an optocoupler driven by a TSM device
in isolated applications. This makes the VIPer series suitable for general LED
illumination, interior decoration lighting, and neon and bulb replacement.
Key features
QQ
QQ
QQ
QQ
QQ
QQ
QQ
DIP-7
Key benefits
800 V avalanche-rugged power section
PWM operation with fixed frequency and frequency jittering or QR control for
valley switching operation
Standby power < 50 mW at 265 Vac
Hysteretic thermal shutdown
HV startup
Limiting current with adjustable set point
Extra power timer for extra power capability
QQ
QQ
QQ
QQ
QQ
QQ
Sales code
Board
Description
Cost-effective solutions with
minimum component count
High robustness
Advanced controllers and
functionalities
Easily meets all new energy
regulations:
QQ High efficiency
QQ Minimum standby current
Portfolio with high differentiation and
continuous improvement
Technical support by tools and
competence centers
Technical documents
STEVAL-ILL017V1
3.5 W non-isolated offline constant-current LED driver based on VIPer17HN
AN2811: 3.5 W non-isolated offline
constant-current LED driver based on
VIPER17
STEVAL-ILL026V1
3 W non-isolated offline LED driver based on VIPer22AS-E
AN2961: STEVAL-ILL026V1 non-isolated
3 W offline LED driver based on the
VIPER22A-E
EVLVIP27-7WLED
3.5 W non-isolated offline constant-current LED driver based on VIPer17HN
AN3212: 3.5 W to 7 W high power factor
offline LED driver based on VIPer devices
36
Application example
AC
Bipolar current
control
Controller
VIPerxx
Application example: buck SMPS offline LED driver
AC
VIPerxx
Controller
Voltage and
current control
TSMxx/SEA05
Rsense
Controller
VIPerxx
Application example: buck-boost SMPS offline LED driver
Application example: flyback SMPS for offline LED driver
Efficiency variation
90
0.35
80
0.30
70
0.25
Efficiency (%)
LED current (A)
Current regulation
0.40
0.20
0.15
60
50
40
30
0.10
20
0.05
10
0.00
0
1
2
LEDs
3
4
5
6
7
8
9
LED current
0
0
1
2
Pout (W)
3
4
5
6
7
Vin = 110 Vac
8
9
10
Vin = 220 Vac
37
PFC controllers
L6562A/AT
The L6562A/AT is a current-mode PFC controller operating in transition mode (TM).
The highly linear multiplier includes a special circuit that reduces AC input current
distortion and allows wide-range mains operation with an extremely low THD, even
over a large load range. The output voltage is controlled by means of a voltagemode error amplifier and an accurate internal voltage reference (1% @ Tj = 25 °C).
The device features extremely low consumption (60 μA max. before start-up and
75 W
Application example
AC
AC
L6562A
L6562A
Off-line single stage modified
buck-boost LED driver
38
Off-line single stage modified
buck LED driver
Application example
AC
Voltage
control
TL431
MULT VCC
L6562A/AT GD
COMP
INV
DC-DC
DC-DC
ZCD
Solution benefits:
- Suitable also for single LED string with TSM10x/SEA05
- High power factor
- Cost effective solution
L6562A/AT
L6562A/AT
Application example: offline two stages solution, modified buck topology with PFC stage
Sales code
Board
Description
Technical documents
UM0670: 80 W offline LED driver with PFC
STEVAL-ILL013V1
80 W offline LED driver with dimming based on L6562A
STEVAL-ILL016V2
15 W offline Triac dimmable LED driver (USA market - 115 V)
AN2711: 15 W offline Triac dimmable
LED driver
EVL6562A-LED
Constant-current inverse buck LED driver using the L6562A
AN2983: Constant current inverse buck
LED driver using L6562A
EVL6562A-35WFLB
35 W wide-range high power factor flyback converter using L6562A
AN2838: 35 W wide-range high power
factor flyback converter demonstration
board using the L6562A
STEVAL-ILL027V2
18 W single-stage offline LED driver based on L6562A
AN3111: 18 W single-stage offline LED
driver
STEVAL-ILL019V1
35 W offline LED driver for 4-channel high-brightness RGB LED based on
L6562A
UM0926: STEVAL-ILL019V1 offline RGGB
LED driver demonstration board with
high PF
STEVAL-ILL034V1
LED Driver for A 19 lamp based on L6562A (USA market)
AN3256: LED driver for A 19 lamp
AN2928: Modified buck converter for
LED applications
39
Resonant and quasi-resonant controllers
L6599A/AT
The L6599A/AT is a double-ended controller specific for the series-resonant halfbridge topology. It provides 50% complementary duty cycle: the high-side and
low-side switches are driven on/off 180° out-of-phase for exactly the same time.
Output voltage regulation is obtained by modulating the operating frequency. A
fixed deadtime inserted between the turn-off of one switch and the turn-on of the
other one guarantees soft-switching and enables high-frequency operation.
Key features
QQ
QQ
QQ
QQ
QQ
QQ
QQ
QQ
QQ
DIP-16
SO-16N
Key benefits
50% duty cycle, variable frequency control of resonant half-bridge
High-accuracy oscillator
Operating frequency: up to 500 kHz
Two-level OCP: frequency shift and latched shutdown
Interface with PFC controller
Latched disable input
Burst-mode operation at light load
Input for power-on/off sequencing or brownout protection
Non-linear soft-start for monotonic output voltage rise
QQ
QQ
QQ
Advanced standby performances
Compliance to the main worldwide
energy programs (EPA2, Energy
Star, etc.)
Compliance to the main worldwide
EMI regulations
Application example
Input
filter
PF controller
L6562A/AT
V
control
Resonant
controller
L6599A/AT
DC-DC
DC-DC
Application example: offline two-stages solution, LLC resonant half bridge with PFC stage
Sales code
Board
Description
Technical documents
EVL130W-SL-EU
48 V - 130 W LED street lighting SMPS based on L6562AT and L6599AT for
European input mains range
AN3105: 48 V - 130 W high efficiency
converter with PFC for LED street lighting
applications - European version
EVL130W-STRLIG
48 V - 130 W LED street lighting SMPS based on L6562AT and L6599AT for
wide input mains range
AN3106: 48 V - 130 W high-efficiency
converter with PFC for LED street lighting
applications
40
L6585DE
The L6585DE integrates all the functions required to ensure correct operation
of electronic ballasts and high-brightness LED power supplies. This combo IC
generates more light from less energy, and is compliant with major safety and
power consumption regulations.
The L6585DE one-chip solution replaces two separate ICs (a PFC and a resonant
half bridge controller), greatly reducing design time and complexity, lowering costs
and providing a flexible solution.
SO-20
High programmability and a wide range of protection features help customers
design cost-effective and reliable applications.
Key features
Key benefits
Half bridge section
PFC section
QQ
QQ
QQ
QQ
QQ
Transition mode PFC with
overcurrent and overvoltage
protection
Feedback disconnection and choke
saturation detection
Undervoltage lockout
Wide-range mains operation with
THD always below 10%
High current capability drivers
(300 mA source and 600 mA sink)
QQ
QQ
QQ
QQ
QQ
3% oscillator precision
1.2 µs deadtime
Smart hard switching detection
High current capability drivers
(290 mA source and 480 mA sink)
Overcurrent control
QQ
QQ
QQ
QQ
One-chip solution for double-stage
SMPS topology
Suitable for high-efficiency and small
form factor LED SMPS with very
high output power
Design flexibility
Maximized SMPS reliability
Application example
AC
V
control
PFC
controller
DC-DC
DC-DC
Resonant
half bridge
controller
L6585DE
combo IC for PFC
and half bridge
41
Microcontrollers
STM8
The STM8 is a platform of technologies, IPs and tools which forms the basis of STMicroelectronics’ comprehensive family of
8‑bit microcontrollers. These cover a wide range of applications from low‑power and consumer electronics, through home
appliances and factory automation to automotive segments.
The platform provides outstanding levels of digital and analog performance combined with a high level of cost effectiveness.
Implemented around a high‑performance 8‑bit core and a state‑of‑the‑art set of peripherals, the microcontrollers in the STM8
family are manufactured using an ST‑proprietary 130 nm embedded non‑volatile memory technology.
STM8 core
STM8S MCU family for industrial applications
The STM8 core is an evolution of the
industry‑standard ST7 core. It has
been significantly improved to reach
1.6 cycles per instruction and up to
24 MHz clock frequency.
STMicroelectronics’ STM8S family of general‑purpose 8‑bit Flash microcontrollers
offers ideal solutions for industrial and appliance market requirements. An
advanced core version combined with a 3‑stage pipeline ranks the STM8S
microcontroller in the top position for performance. The true embedded EEPROM
and the calibrated RC oscillator bring a significant cost effectiveness to the majority
of applications. An easy‑to‑use and intuitive development environment contributes
to improving time to market.
Complete instructions
B4
B3
B2
32-bit
memory
3-stage
pipeline
Fetch
Decode
Execute
STM8L ultra‑low‑power MCU family
B1
Data
memory
STM8 core
The key features of the STM8 core are:
QQ
QQ
QQ
QQ
QQ
QQ
QQ
QQ
QQ
QQ
QQ
QQ
42
Harvard architecture
16‑bit index registers and stack
pointer
32‑bit memory interface and
3‑stage pipeline
Extended instruction set
Enhanced stack pointer operations
Move instruction for fast data
transfer
Hardware division (16 / 8)
Faster multiplication (8 x 8)
8‑bit signed arithmetic support
Advanced addressing modes
including indexed addressing
Statistically optimized instruction
tables
Dedicated firmware library for
DALI (Digital Addressable Lighting
Interface) to allow energy saving,
comfort, advanced and remote
control for modern lighting
applications
STMicroelectronics proposes an ultra‑low‑power family of MCUs based on the
8‑bit and 32‑bit cores. The STM8L MCU family, based on the STM8 proprietary
core, is the entry point of the platform.
The STM8L family combines high performance and ultra‑low power consumption
using a new proprietary ultra‑low leakage process and optimized architecture. This
family is declined in three different lines, making the STM8L an optimal family to
support many applications with special care on power savings.
The STM8L101 is the entry point for the ultra‑low‑power 8‑bit portfolio. It is cost
optimized and offers a high level of integration in an ultra‑small footprint. The
STM8L151 is the feature‑rich 8‑bit solution. The STM8L152 has an additional
segment LCD driver compared to the STM8L151.
STM8A automotive MCU family
This product line of 8‑bit Flash microcontrollers responds to the specific needs
of automotive applications. From product specifications, on through design and
manufacturing, the focus is on reliability, application robustness and low system
cost. The integrated true data EEPROM features top notch endurance and data
retention throughout the full temperature range. With its extended temperature
range up to 150 °C ambient temperature, the STM8A is the ideal and economic
solution for the growing market of automotive 8‑bit applications.
Tools for everyone
The ecosystem of advanced STM8
tools is a scalable offer to satisfy all
needs. From free‑of‑charge software
tools, including free compiler licenses,
to low‑cost starter kits and affordable
evaluation boards for multiple
applications, ST tools and support
open the door to the ST microcontroller
universe.
ST’s fully tested, optimized and
validated downloadable source‑code
libraries are immediately available for
new application development.
Timers
Analog Inputs
Communications
System
STM8S product lines
Common core peripherals
and architecture:
UART
LIN/smartcard/IrDA
I²C
400 kHz multimaster
SPI 10 MHz
Up to 3x 16‑bit timer
8‑bit timer
2x watchdogs
(WDG and WWDG)
AWU beeper 1/2/4 kHz
10‑bit ADC
Up to 16 channels
Xtal
16 MHz and 128 kHz
internal RC oscillators
SWIM
debug module
STM8S903x Application specific line
STM8 core
@ 16 MHz
8‑Kbyte
Flash
1‑Kbyte
SRAM
640‑bytes 7 analog Voltage
EEPROM channels reference
Timer
sync
STM8S20x Performance line
+
Up to
STM8 core 128‑Kbyte
Flash
@ 24 MHz
Up to
6‑Kbyte
SRAM
Up to
2‑Kbyte CAN 2.0B 2nd UART
EEPROM
Up to
2‑Kbyte
SRAM
Up to
1‑Kbyte
EEPROM
STM8S10x Access line
Up to
STM8 core 32‑Kbyte
Flash
@ 16 MHz
STM8S10x Access line*
Up to
STM8 core 64‑Kbyte
Flash
@ 16 MHz
1‑Kbyte
SRAM
Note: *Available in Q2/2011
STM8L product lines
Common core peripherals
and architecture:
STM8L162
Communication
peripherals
USART, SPI,I²C
Multiple
16‑bit timer
Internal 16 MHz
and 38 kHz
RC oscillators
Watchdog
(dual watchdogs on
STM8L15x/16x)
Reset circuitry
POR/PDR
2x comparators
Up to
STM8 core 64‑Kbyte
Flash
@ 16 MHz
Up to
4‑Kbyte
SRAM
Reset
Main osc.
+
input
BOR PVD 1‑16 MHz
Data
EEPROM
RTC with
12‑bit
LCD AES
32 kHz DMA ADC (1 µs) 12‑bit
osc.
Temp. sensor DAC 8x40 128-bit
Up to
4‑Kbyte
SRAM
Reset
Main osc.
+
input
BOR PVD 1‑16 MHz
Data
EEPROM
RTC with
12‑bit
LCD
32 kHz DMA ADC (1 µs) 12‑bit
osc.
Temp. sensor DAC 8x40
Up to
4‑Kbyte
SRAM
Reset
Main osc.
Up to
RTC with
12‑bit
+
input
2-Kbyte Data 32 kHz DMA ADC (1 µs) 12‑bit
BOR PVD 1‑16 MHz
EEPROM
osc.
Temp. sensor DAC
STM8L152
+
Up to
STM8 core 64‑Kbyte
Flash
@ 16 MHz
STM8L151
Up to
STM8 core 64‑Kbyte
Flash
@ 16 MHz
STM8L101
Up to
STM8 core 8‑Kbyte
@ 16 MHz Flash*
Abbreviations:
BOR: Brown‑out reset
Osc.: Oscillator
Up to
1.5‑Kbyte
SRAM
POR: Power‑on reset
PDR: Power‑down reset
PVD: Programmable voltage detector
RTC: Real‑time clock
STM8A product lines
Common core peripherals and architecture:
Up to 2x U(S)ART
I²C 400 kHz multimaster
SPI 10 MHz
Up to 3x 16‑bit timer 8‑bit timer
2x watchdogs (WDG and WWDG)
AWU Beeper 1/2/4 kHz
10‑bit ADC Up to 16 channel
Xtal 16 MHz and 128 kHz internal RC oscillators
SWIM debug module
STM8AF62xx Standard line
+
STM8 core
up to 24 MHz
Up to
128‑Kbyte
Flash
Up to
6‑Kbyte
SRAM
Up to
2‑Kbyte
EEPROM
Up to
6‑Kbyte
SRAM
Up to
2‑Kbyte
EEPROM
STM8AF52xx CAN line
STM8 core
up to 24 MHz
Up to
128‑Kbyte
Flash
CAN 2.0B
43
STM8 (cont’d)
Digital constant current controller for multi-string LED driving based on STM8S
VIN
30 W
30 W
30 W
30 W
48 V
PWM1
PWM-2 ADC-2
PWM-3 ADC-3
PWM-4 ADC-4
ADC-1
PWM-1
STM8S20xx
Microcontroller
Demonstration board features
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Inverse buck topology
LED string independent average current control
Input DC bus voltage: 48 V
System power: 120 W
Switching frequency: 100 kHz
Ripple current: