L5974AD

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 QQ QQ QQ QQ 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 QQ QQ QQ QQ QQ QQ QQ 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 QQ QQ QQ QQ QQ QQ QQ QQ 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 QQ QQ QQ QQ QQ QQ QQ QQ QQ QQ 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 QQ QQ QQ QQ QQ QQ QQ QQ QQ QQ QQ QQ 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 QQ QQ QQ QQ QQ QQ 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 QQ 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 QQ QQ QQ QQ QQ QQ 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 QQ QQ QQ QQ QQ QQ 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 QQ QQ QQ QQ QQ QQ QQ QQ QQ 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 QQ QQ QQ QQ QQ QQ QQ QQ QQ QQ QQ 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: