Infineon® Power LED Driver TLD5098EL
DC/DC Boost, Buck-Boost, SEPIC controller
Datasheet
Rev. 1.0, 2010-10-13
Automotive Power
TLD5098EL
Table of Contents
Table of Contents
1 2 3 3.1 3.2 4 4.1 4.2 4.3 5 5.1 5.2 6 6.1 6.2 7 7.1 7.2 8 8.1 8.2 9 9.1 9.2 10 10.1 10.2 10.3 11 11.1 12 13 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Pin Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Pin Assignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Pin Definitions and Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 General Product Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Functional Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Thermal Resistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 7 8 9
Boost Regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Oscillator and Synchronization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Enable and Dimming Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Linear Regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Protection and Diagnostic Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 Analog Dimming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Purpose of Analog Dimming: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 27 27 31
Application Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 Further Application Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 Package Outlines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Datasheet
2
Rev. 1.0, 2010-10-13
DC/DC Boost, Buck-Boost, SEPIC controller TLD5098EL
TLD5098EL
1
Features • • • • • • • • • • • • • • • • • • •
Overview
Wide Input Voltage Range from 4.5 V to 45 V Constant Current or Constant Voltage Regulation Drives LEDs in Boost (B2G), Buck-Boost (B2B) and SEPIC Topology Very Low Shutdown Current: Iq_OFF < 10 µA Flexible Switching Frequency Range, 100 kHz to 500 kHz Synchronization with external clock source PWM Dimming Analog Dimming feature to adjust average LED current PG-SSOP-14 Internal 5 V Low Drop Out Voltage Regulator Open Circuit Detection Short to GND Protection Output Overvoltage Protection Internal Soft Start Over Temperature Shutdown Wide LED current range via simple adaptation of external components 300mV High Side Current Sense to ensure highest flexibility and LED current accuracy Available in a small thermally enhanced PG-SSOP-14 package Automotive AEC Qualified Green Product (RoHS) Compliant
Description The TLD5098EL is a LED boost controller with built in protection features. The main function of this device is to regulate a constant LED current. The constant current regulation is especially beneficial for LED color accuracy and longer lifetime. The controller concept of the TLD5098EL allows multiple configurations such as Boost, Buck/Boost and SEPIC by simply adjusting the external components. The TLD5098EL offers the most flexible dimming options. Dimming can be achieved with analog or PWM input.The switching frequency is adjustable in the range of 100 kHz to 500 kHz and can be synchronized to an external clock source. The TLD5098EL features an enable function reducing the shut-down current consumption to Iq_OFF < 10 µA. The current mode regulation scheme of this device provides a stable regulation loop maintained by small external compensation components. The integrated soft start feature limits the current peak as well as voltage overshoot at start-up. This IC is suited for use in the harsh automotive environments and provides output overvoltage protection, device overtemperature shutdown and short circuit to GND protection. Applications • Automotive Exterior and Interior Lighting
Type TLD5098EL Datasheet
Package PG-SSOP-14 3
Marking TLD5098 Rev. 1.0, 2010-10-13
TLD5098EL
Block Diagram
2
Block Diagram
IN
14 Internal Supply
LDO Power On Reset EN_INT/ PWM_INT
1
IVCC
EN / PWMI
13
On/Off Logic
Oscillator
Soft Start
Power Switch Gate Driver
2
SWO
FREQ / SYNC
11 Slope Comp. Thermal Protection Open Load + Short to GND detection Leading Edge Blanking Over Volage Protection 4 3
PWM Generator
Switch Current Error Amplifier
SWCS SGND
9
OVFB
SET COMP
10
Reference Current Generation Feedback Voltage Error Amplifier 6 7
FBH FBL
8
EN_INT/ PWM_INT 12
Dimming Switch Gate Driver
5
PWMO
GND
Figure 1 Block Diagram
Datasheet
4
Rev. 1.0, 2010-10-13
TLD5098EL
Pin Configuration
3
3.1
Pin Configuration
Pin Assignment
IVCC SWO SGND SWCS PWMO FBH FBL
1 2 3 4 5 6 7 exposed Pad
14 13 12 11 10 9 8
PINCONFIG_SSOP-14_5098.SVG
IN EN/PWMI GND FREQ/SYNC SET OVFB COMP
Figure 2
Pin Configuration
3.2
Pin 1
Pin Definitions and Functions
Symbol IVCC Function Internal LDO Output; Used for internal biasing and gate drive. Bypass with external capacitor close to the pin. Pin must not be left open. Switch Output; Connect to gate of external switching MOSFET Current Sense Ground; Ground return for current sense switch Current Sense Input; Detects the peak current through switch PWM Dimming Output; Connect to gate of external MOSFET Voltage Feedback Positive; Non inverting Input (+) Voltage Feedback Negative; Inverting Input (-) Compensation Input; Connect R and C network to pin for stability
2 3 4 5 6 7 8
SWO SGND SWCS PWMO FBH FBL COMP
Datasheet
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Rev. 1.0, 2010-10-13
TLD5098EL
Pin Configuration Pin 9 10 Symbol OVFB SET Function Output Overvoltage Protection Feedback; Connect to resistive voltage divider to set overvoltage threshold. Analog Dimming Input; Load current adjustment Pin. Pin must not be left open. If analog dimming feature is not used connect to IVCC pin. Frequency Select or Synchronization Input; Connect external resistor to GND to set frequency. Or apply external clock signal for synchronization within frequency capture range. Ground; Connect to system ground. Enable or PWM Input; Apply logic HIGH signal to enable device or PWM signal for dimming LED. Supply Input; Supply for internal biasing. Exposed Pad; Connect to external heatspreading GND Cu area (e.g. inner GND layer of multilayer PCB with thermal vias).
11
FREQ / SYNC
12 13 14
GND EN / PWMI IN
EP
Datasheet
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Rev. 1.0, 2010-10-13
TLD5098EL
General Product Characteristics
4
4.1
General Product Characteristics
Absolute Maximum Ratings
Absolute Maximum Ratings1)
Tj = -40 ⋅C to +150 ⋅C; all voltages with respect to ground, positive current flowing into pin
(unless otherwise specified) Pos. Parameter Symbol Limit Values Min. Voltages 4.1.1 4.1.2 4.1.3 4.1.4 IN Supply Input EN / PWMI Enable or PWM Input FBH-FBL Feedback Error Amplifier Differential FBH Feedback Error Amplifier Positive Input Max. 45 45 61 61 V V V V – – The maximum delta must not exceed 61V The difference between VFBH and VFBL must not exceed 61V, refer to Parameter 4.1.3 The difference between VFBH and VFBL must not exceed 61V, refer to Parameter 4.1.3 t < 100ms, VFBH - VFBL = 0.3V – Unit Conditions
VIN VEN VFBH-VFBL VFBH
-0.3 -40 -40 -40
4.1.5
FBL VFBL Feedback Error Amplifier Negative Input
-40
61
V
4.1.6 4.1.7 4.1.8 4.1.9 4.1.10 4.1.11 4.1.12 4.1.13 4.1.14 4.1.15 4.1.16 4.1.17 4.1.18 4.1.19 4.1.20 4.1.21 4.1.22 4.1.23
FBH and FBL current OVFB Over Voltage Feedback Input SWCS Switch Current Sense Input SWO Switch Gate Drive Output SGND Current Sense Switch GND COMP Compensation Input FREQ / SYNC; Frequency and Synchronization Input PWMO PWM Dimming Output SET IVCC Internal Linear Voltage Regulator Output Junction Temperature
IFBL,FBH VOVP VSWCS VSWO VSGND VCOMP
– -0.3 -0.3 -0.3 -0.3 -0.3 -0.3 -0.3 -0.3 -0.3
1 5.5 6.2 5.5 6.2 5.5 6.2 0.3 5.5 6.2 5.5 6.2 5.5 6.2 45 5.5 6.2 150
mA V V V V V V V V V V V V V V V V °C
t < 10s
–
t < 10s
–
t < 10s
– –
t < 10s
–
VFREQ / SYNC -0.3
-0.3
t < 10s
–
VPWMO VSET VIVCC
-0.3 -0.3 -0.3 -0.3 -0.3
t < 10s
– –
t < 10s
–
Temperatures
Tj
7
-40
Datasheet
Rev. 1.0, 2010-10-13
TLD5098EL
General Product Characteristics Absolute Maximum Ratings1)
Tj = -40 ⋅C to +150 ⋅C; all voltages with respect to ground, positive current flowing into pin (unless otherwise specified)
Pos. 4.1.24 4.1.25 4.1.26 Parameter Storage Temperature ESD Resistivity of all Pins ESD Resistivity of IN, EN/PWMI, FBH, FBL and SET pin to GND Symbol Limit Values Min. Max. 150 2 4 °C kV kV – HBM2) HBM2) -55 -2 -4 Unit Conditions
Tstg VESD,HBM VESD,HBM
ESD Susceptibility
1) Not subject to production test, specified by design. 2) ESD susceptibility, Human Body Model “HBM” according to EIA/JESD 22-A114B
Note: Stresses above the ones listed here may cause permanent damage to the device. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Note: Integrated protection functions are designed to prevent IC destruction under fault conditions described in the data sheet. Fault conditions are considered as “outside” normal operating range. Protection functions are not designed for continuous repetitive operation.
4.2
Pos. 4.2.1
Functional Range
Parameter Extended Supply Voltage Range Symbol Min. Limit Values Max. 451) V 4.5 Unit Conditions
VIN
VIVCC > VIVCC,RTH,d;
Parameter deviations possible
4.2.2 4.2.3 4.2.4
Nominal Supply Voltage Range Feedback Voltage Input Junction Temperature
VIN VFBH; VFBL Tj
8 3 -40
34 60 150
V V °C
– – –
1) Not subject to production test, specified by design.
Note: Within the functional range the IC operates as described in the circuit description. The electrical characteristics are specified within the conditions given in the related electrical characteristics table.
Datasheet
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Rev. 1.0, 2010-10-13
TLD5098EL
General Product Characteristics
4.3
Thermal Resistance
Note: This thermal data was generated in accordance with JEDEC JESD51 standards. For more information, go to www.jedec.org. Pos. Parameter
1) 2) 1) 3)
Symbol Min.
Limit Values Typ. 10 47 54 64 Max. – – – – – – – –
Unit K/W K/W K/W K/W
Conditions – 2s2p 1s0p + 600 mm2 1s0p + 300 mm2
4.3.1 Junction to Case 4.3.3 4.3.4
4.3.2 Junction to Ambient
RthJC RthJA RthJA RthJA
1) Not subject to production test, specified by design. 2) Specified RthJC value is simulated at natural convection on a cold plate setup (all pins and the exposed pad are fixed to ambient temperature). Ta=25°C; The IC is dissipating 1W. 3) Specified RthJA value is according to JEDEC 2s2p (JESD 51-7) + (JESD 51-5) and JEDEC 1s0p (JESD 51-3) + heatsink area at natural convection on FR4 board; The device was simulated on a 76.2 x 114.3 x 1.5 mm board. The 2s2p board has 2 outer copper layers (2 x 70µm Cu) and 2 inner copper layers (2 x 35µm Cu). A thermal via (diameter = 0.3 mm and 25 µm plating) array was applied under the exposed pad and connected the first outer layer (top) to the first inner layer and second outer layer (bottom) of the JEDEC PCB. Ta=25°C; The IC is dissipating 1W.
Datasheet
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Rev. 1.0, 2010-10-13
TLD5098EL
Boost Regulator
5
5.1
Boost Regulator
Description
The TLD5098EL regulator is suitable for boost, buck-boost and SEPIC configurations. The constant output current is especially useful for light emitting diode (LED) applications. The regulator function is implemented by a pulse width modulated (PWM) current mode controller. The PWM current mode controller uses the peak current through the external power switch and error in the output current to determine the appropriate pulse width duty cycle (on time) for constant output current. The current mode controller provides a PWM signal to an internal gate driver which then outputs to an external n-channel enhancement mode metal oxide field effect transistor (MOSFET) power switch. The current mode controller also has built-in slope compensation to prevent sub-harmonic oscillations which is a characteristic of current mode controllers operating at high duty cycles (>50% duty). An additional built-in feature is an integrated soft start that limits the current through the inductor and external power switch during initialization. The soft start function gradually increases the inductor and switch current over tSS (Parameter 5.2.9) to minimize potential overvoltage at the output.
OV FB
OVFB 9
VRef =
1.25V
H when OVFB >1.25V
COMP 8 FBH 6 FBL 7
0 if SET < 1.6V
High when IVCC < 4.0V
UV IVCC
x1
EA
gmEA
I EA
Current Comp High when l EA - I SLOPE - I CS > 0 OFF when H Low when T j > 175 °C R
NOR
= VRef 4.0V Output Stage OFF when Low R
> 1
Gate Driver Supply
1 IVCC 2 SWO
& &
Q
INV 1 Gate Driver
SET 10
0
VRef
V
1
(SET − 0.1V ) 5
= VRef
Soft start
I SL O PE
& &
Q S Q
0.3V
Oscillator
I
Slope Comp
PWM-FF Q NAND 2
Current Sense
I CS
4 SWCS 3 SGND
FREQ/ 11 SYNC
t
Clock
S
Error-FF
&
Figure 3
Boost Regulator Block Diagram
Datasheet
10
Rev. 1.0, 2010-10-13
TLD5098EL
Boost Regulator
5.2
1)
Electrical Characteristics
EC Boost Regulator
Table 1
VIN = 8V to 34V; Tj = -40 ⋅C to +150 ⋅C, all voltages with respect to ground, positive current flowing into pin; (unless
otherwise specified) Pos. Parameter Symbol Min. Regulator: 5.2.1 Feedback Reference Voltage Limit Values Typ. 0.30 Max. 0.31 V Unit Conditions
VREF
0.29
refer to Figure 25 VREF= VFBH -VFBL VSET= 5V ILED= 350 mA refer to Figure 25 VREF= VFBH -VFBL VSET= 0.4V ILED= 70mA refer to Figure 17 and Figure 25 VREF= VFBH -VFBL VSET= 0.1V VOUT>VIN refer to Figure 25 VIN = 8V to 19V; VSET = 5V; ILED = 350mA refer to Figure 25 VSET = 5V; ILED = 100 to 500mA VFBH = VFBL = 5V VCOMP = 3.5V
Fixed frequency mode Synchronization mode
5.2.2
Feedback Reference Voltage
VREF
0.057
0.06
0.063
V
5.2.3
Feedback Reference Voltage Offset
VREF_offset –
–
5
mV
5.2.4
Voltage Line Regulation
(ΔVREF / VREF) / ΔVIN (ΔVREF / VREF) / ΔIBO
–
–
0.15
%/V
5.2.5
Voltage Load Regulation
–
–
5
%/V
5.2.6 5.2.7 5.2.8 5.2.9 5.2.10 5.2.11 5.2.12 5.2.13 5.2.14
Switch Peak Over Current Threshold Maximum Duty Cycle Maximum Duty Cycle Soft Start Ramp IFBH Feedback High Input Current IFBL Feedback Low Input Current Switch Current Sense Input Current Input Undervoltage Shutdown Input Voltage Startup
VSWCS
130
150 93 – 1000 46 21 50 – –
170 95 – 1500 54 27 100 4.5 4.85
mV % % µs µA µA µA V V
DMAX,fixed 91 DMAX,sync 88 tSS 350 IFBH IFBL ISWCS VIN,off VIN,on
38 15 10 3.5 –
VFB rising from 5% to 95% of VFB, typ. VFBH - VFBL = 0.3V VFBH - VFBL = 0.3V VSWCS = 150mV VIN decreasing VIN increasing
1) Not subject to production test, specified by design
Datasheet
11
Rev. 1.0, 2010-10-13
TLD5098EL
Boost Regulator Table 1 EC Boost Regulator
VIN = 8V to 34V; Tj = -40 ⋅C to +150 ⋅C, all voltages with respect to ground, positive current flowing into pin; (unless otherwise specified)
Pos. Parameter Symbol Min. Gate Driver for external Switch 5.2.15 5.2.16 5.2.17 5.2.18 5.2.19 Gate Driver Peak Sourcing Current Gate Driver Peak Sinking Current Gate Driver Output Rise Time Gate Driver Output Fall Time Gate Driver Output Voltage Limit Values Typ. 380 550 30 20 – Max. – – 60 40 5.5 mA mA ns ns V
1)
Unit
Conditions
ISWO,SRC ISWO,SNK tR,SWO tF,SWO VSWO
– – – – 4.5
VSWO = 1V to 4V VSWO = 4V to 1V
1)
1)
CL,SWO = 3.3nF; VSWO = 1V to 4V 1) CL,SWO = 3.3nF; VSWO = 4V to 1V 1) CL,SWO = 3.3nF;
1) Not subject to production test, specified by design
Datasheet
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Rev. 1.0, 2010-10-13
TLD5098EL
Oscillator and Synchronization
6
6.1
Oscillator and Synchronization
Description
The internal oscillator is used to determine the switching frequency of the boost regulator. The switching frequency can be selected from 100 kHz to 500 kHz with an external resistor to GND. To set the switching frequency with an external resistor the following formula can be applied.
R FREQ =
(141 × 10 [ ])× ( f
− 12 s Ω
1
FREQ
[1s ])
− 3 . 5 × 10 3 [Ω ]
(
) [Ω ]
In addition, the oscillator is capable of changing from the frequency set by the external resistor to a synchronized frequency from an external clock source. If an external clock source is provided on the pin FREQ/SYNC, then the internal oscillator synchronizes to this external clock frequency and the boost regulator switches at the synchronized frequency. The synchronization frequency capture range is 250 kHz to 500 kHz.
FREQ / SYNC
11
Oscillator Clock Frequency Detector
Multiplexer
PWM Logic
Gate Driver
2
SWO
VCLK
RFREQ
Figure 4
Oscillator and Synchronization Block Diagram and Simplified Application Circuit
TSYNC = 1 / fSYNC
VSYNC
4.5 V VSYNC,H VSYNC,L 0.5 V
tSYNC,TR
tSYNC,TR tSYNC,PWH
t
Figure 5 Synchronization Timing Diagram
Datasheet
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Rev. 1.0, 2010-10-13
TLD5098EL
Oscillator and Synchronization
6.2
Table 2
Electrical Characteristics
EC Oscillator and Synchronization
VIN = 8V to 34V; Tj = -40 ⋅C to +150 ⋅C, all voltages with respect to ground, positive current flowing into pin; (unless
otherwise specified) Pos. Parameter Symbol Min. Oscillator: 6.2.1 6.2.2 6.2.3 6.2.4 6.2.5 6.2.6 6.2.7 6.2.8 Oscillator Frequency Oscillator Frequency Adjustment Range FREQ / SYNC Supply Current Frequency Voltage Synchronization Frequency Capture Range Synchronization Signal High Logic Level Valid Synchronization Signal Low Logic Level Valid Synchronization Signal Logic High Pulse Width Limit Values Typ. 300 – – 1.24 – – – – Max. 350 500 -700 1.32 500 – 0.8 – kHz kHz µA V kHz V V ns Unit Conditions
fFREQ fFREQ IFREQ VFREQ fSYNC VSYNC,H VSYNC,L
250 100 – 1.16 250 3.0 –
RFREQ = 20kΩ
VFREQ = 0V fFREQ = 100kHz
–
1) 2)
Synchronization
1) 2)
tSYNC,PWH 200
1) 2)
1) Synchronization of external PWM ON signal to falling edge 2) Not subject to production test, specified by design
Datasheet
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Rev. 1.0, 2010-10-13
TLD5098EL
Oscillator and Synchronization Typical Performance Characteristics of Oscillator Switching Frequency fSW versus Frequency Select Resistor to GND RFREQ/SYNC
600
500
400 fFREQ [kHz]
T j = 25 °C
300
200
100
0 0 10 20 30 40 50 60 70 80 RFREQ/SYNC [kohm]
Datasheet
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Rev. 1.0, 2010-10-13
TLD5098EL
Enable and Dimming Function
7
7.1
Enable and Dimming Function
Description
The enable function powers ON or OFF the device. A valid logic LOW signal on enable pin EN/PWMI powers OFF the device and current consumption is less than Iq_OFF (Parameter 7.2.14). A valid logic HIGH enable signal on enable pin EN/PWMI powers on the device. The enable function features an integrated pull down resistor which ensures that the IC is shut down and the power switch is OFF in case the enable pin EN is left open. In addition to the enable function described above, the EN/PWMI pin detects a pulse width modulated (PWM) input signal that is fed through to an internal gate driver. The internal gate driver outputs the same PWM signal on the PWMO pin to an external N-channel enhancement mode MOSFET for PWM dimming an LED load. PWM dimming an LED is a commonly practiced dimming method and can prevent color shift in an LED light source. Moreover the PWM output function may also be used to drive other types of loads besides LED. The enable and PWM input function share the same pin. Therefore a valid logic LOW signal at the EN/PWMI pin needs to differentiate between an enable power OFF or an PWM dimming LOW signal. The device differentiates between enable OFF and PWM dimming signal by requiring the enable OFF at the EN/PWMI pin to stay LOW for the Enable Turn OFF Delay Time (tEN,OFF,DEL Parameter 7.2.6).
IN
14
Enable
LDO
1
IVCC
Microcontroller
EN / PWMI
13
Enable / PWMI Logic
Enable
Gate Driver
2
SWO
PWMI
Gate Driver
5
PWMO
Figure 6
Block Diagram and Simplified Application Circuit Enable and LED Dimming
Datasheet
16
Rev. 1.0, 2010-10-13
TLD5098EL
Enable and Dimming Function
tEN,START
TPWMI
tPWMI,H
tEN,OFF,DEL
VEN/PWMI
VEN/PWMI,ON VEN/PWMI,OFF
t VIVCC
VIVCC,ON VIVCC,RTH
t VPWMO
TFREQ =
VSWO
1 fFREQ
t
t
Power ON
Normal SWO ON PWMO ON
Dim PWMO OFF SWO OFF
Normal SWO ON PWMO ON
Dim PWMO OFF SWO OFF
Normal SWO ON PWMO ON
Power OFF Delay Time
Power OFF Iq_OFF
Figure 7
Timing Diagram Enable and LED Dimming
7.2
Table 3
Electrical Characteristics
EC Enable and Dimming
VIN = 8V to 34V; Tj = -40 ⋅C to +150 ⋅C, all voltages with respect to ground, positive current flowing into pin; (unless otherwise specified)
Pos. Parameter Symbol Limit Values Min. Enable/PWM Input: 7.2.1 7.2.2 7.2.3 Enable/PWMI Turn On Threshold Enable/PWMI Turn Off Threshold Enable/PWMI Hysteresis Typ. – – 200 17 0.8 400 Max. V V mV – –
1)
Unit
Conditions
VEN/PWMI,ON
3.0
VEN/PWMI,OFF – VEN/PWMI,HYS 50
Datasheet
Rev. 1.0, 2010-10-13
TLD5098EL
Enable and Dimming Function Table 3 EC Enable and Dimming
VIN = 8V to 34V; Tj = -40 ⋅C to +150 ⋅C, all voltages with respect to ground, positive current flowing into pin; (unless otherwise specified)
Pos. 7.2.4 7.2.5 7.2.6 7.2.7 7.2.8 7.2.9 7.2.10 7.2.11 7.2.12 7.2.13 Parameter Enable/PWMI High Input Current Enable/PWMI Low Input Current Enable Turn Off Delay Time PWMI Min Duty Time Enable Startup Time PWMO Gate Driver Peak Sourcing Current PWMO Gate Driver Peak Sinking Current PWMO Gate Driver Output Rise Time PWMO Gate Driver Output Fall Time PWMO Gate Driver Output Voltage Current Consumption, Shutdown Mode Current Consumption, Active Mode2) Symbol Limit Values Min. Typ. – 0.1 10 – – 230 370 50 30 – Max. 30 1 12 – – – – 100 60 5.5 µA µA ms µs µs mA mA ns ns V – – 8 4 100 – – – – 4.5 Unit Conditions
IEN/PWMI,H IEN/PWMI,L tEN,OFF,DEL tPWMI,H tEN,START IPWMO,SRC IPWMO,SNK tR,PWMO tF,PWMO VPWMO
VEN/PWMI = 16.0V VEN/PWMI = 0.5V
– –
1)
Gate Driver for Dimming Switch:
1)
VPWMO = 1V to 4V VPWMO = 4V to 1V CL,PWMO = 3.3nF;
1)
1)
VPWMO = 1V to 4V 1) CL,PWMO = 3.3nF; VPWMO = 4V to 1V 1) CL,PWMO = 3.3nF;
Current Consumption 7.2.14 7.2.15
Iq_OFF Iq_ON
– –
– –
10 7
µA mA
VEN/PWMI = 0.8 V; Tj ≤ 105C; VIN = 16V VEN/PWMI ≥ 4.75V; IBO = 0mA; VSWO = 0% Duty Cycle
1) Not subject to production test, specified by design 2) Dependency on switching frequency and gate charge of boost and dimming switch.
Datasheet
18
Rev. 1.0, 2010-10-13
TLD5098EL
Linear Regulator
8
8.1
Linear Regulator
Description
The internal linear voltage regulator supplies the internal gate drivers with a typical voltage of 5V and current up to ILIM,min (Parameter 8.2.2). An external output capacitor with ESR lower than RIVCC,ESR (Parameter 8.2.5) is required on pin IVCC for stability and buffering transient load currents. During normal operation the external boost and dimming MOSFET switches will draw transient currents from the linear regulator and its output capacitor. Proper sizing of the output capacitor must be considered to supply sufficient peak current to the gate of the external MOSFET switches. Integrated undervoltage protection for the external switching MOSFET: An integrated undervoltage reset threshold circuit monitors the linear regulator output voltage (VIVCC) and resets the device in case the output voltage falls below the IVCC Undervoltage Reset switch OFF Threshold (VIVCC,RTH,d Parameter 8.2.7). The Undervoltage Reset threshold for the IVCC pin helps to protect the external switches from excessive power dissipation by ensuring the gate drive voltage is sufficient to enhance the gate of an external logic level N-channel MOSFET.
IN
14
1
IVCC
Linear Regulator
EN / PWMI
13
Gate Drivers
Figure 8
Voltage Regulator Block Diagram and Simplified Application Circuit
Datasheet
19
Rev. 1.0, 2010-10-13
TLD5098EL
Linear Regulator
8.2
Table 4
Electrical Characteristics
EC Line Regulator
VIN = 8V to 34V; Tj = -40 ⋅C to +150 ⋅C, all voltages with respect to ground, positive current flowing into pin; (unless
otherwise specified) Pos. 8.2.1 8.2.2 8.2.3 8.2.4 8.2.5 8.2.6 8.2.7 8.2.8 Parameter Output Voltage Output Current Limitation Drop out Voltage IVCC Buffer Capacitor Symbol Min. Limit Values Typ. 5 – – 1 – – – – Max. 5.15 90 0.5 100 0.5 – 4.0 4.5 V mA V µF Ω mV V V 6V ≤ VIN ≤ 45V 0.1mA ≤ IIVCC ≤ 50mA 4.85 51 – Unit Conditions
VIVCC ILIM VDR
VIN = 13.5V VIVCC = 4.5V VIN = 4.5V IIVCC = 25mA
1) 2)
CIVCC 0.47 IVCC Buffer Capacitor ESR RIVCC,ESR – Undervoltage Reset Headroom VIVCC,HDRM 100
IVCC Undervoltage Reset switch OFF Threshold IVCC Undervoltage Reset switch ON Threshold
1)
VIVCC,RTH,d 3.6 VIVCC,RTH,i
–
VIVCC decreasing VIVCC - VIVCC,RTH,d 3) VIVCC decreasing. VIVCC increasing
1) Not subject to production test, specified by design 2) Minimum value given is needed for regulator stability; application might need higher capacitance than the minimum. 3) Selection of external switching MOSFET is crucial and the VIVCC,RTH,d min. as worst case VGS must be considered.
Datasheet
20
Rev. 1.0, 2010-10-13
TLD5098EL
Protection and Diagnostic Functions
9
9.1
Protection and Diagnostic Functions
Description
The TLD5098EL has integrated circuits to diagnose and protect against output overvoltage, open load, open feedback and overtemperature faults. Additionally the FBH and FBL potential is monitored and in case the LED load short circuits to GND (see description Figure 15) the regulator stops the operation and protects the system. In case any of the six fault conditions occur the PWMO and IVCC signal will change to an active logic LOW signal to communicate that a fault has occurred (detailed overview in Figure 9 and Figure 10 below). Figure 11 illustrates the various open load and open feedback conditions. In case of an overtemperature condition the integrated thermal shutdown function turns off the gate drivers and internal linear voltage regulator. The typical junction shutdown temperature is 175°C (Tj,SD Parameter 9.2.2). After cooling down the IC will automatically restart. Thermal shutdown is an integrated protection function designed to prevent IC destruction and is not intended for continuous use in normal operation (Figure 13). To calculate the proper overvoltage protection resistor values an example is given in Figure 14.
Input
Output Overvoltage Open Load
Protection and Diagnostic Circuit
Output
OR
Short to GND
SWO and PWMO Gate Driver Off
Open Feedback
Overtemperature Input Undervoltage
OR
Linear Regualtor Off
Figure 9
Protection and Diagnostic Function Block Diagram
Datasheet
21
Rev. 1.0, 2010-10-13
TLD5098EL
Protection and Diagnostic Functions
Input Condition Overvoltage @ Output Open Load Short to GND @ LED chain Open Feedback Overtemperature Undervoltage @ Input
Level* False True False True False True False True False True False True
SWO Sw* L Sw* L Sw* L Sw* L Sw* L Sw* L
Output PWMO IVCC H or Sw * Active L Active H or Sw * Active L Active H or Sw * Active L Active H or Sw * Active L Active H or Sw * Active L Shutdown H or Sw * Active L Shutdown
*Note: Sw = Switching False = Condition does not exist True = Condition does exist
Figure 10
Diagnosis Truth Table
VBO Open Circuit 3
Output Open Circuit Conditions Open Circuit Condition 1 2 3 4 Fault Condition Open FBH Open FBL Open VBO Open PWMO Fault Threshold Voltage VREF -20 to -100 mV 0.5 to 1.0 V -20 to -100 mV Detected by overvoltage
Open Circuit 1 ROVH Overvoltage Compartor OVFB RFB Open Circuit 2 ROVL D1 D2 D3 Feedback Voltage Error Amplifier FBH D4 6 + VREF D5
9
VOVFB,TH
VREF
FBL
D7 D8 D9 D10 Open Circuit 4 TDIM PWMO 5
Min Threshold = 0.5 V Typical V REF = 0.3 V Max Threshold = -20 mV Min Threshold = -100 mV
Open FBH Open VBO
Figure 11
Open Load and Open Feedback Conditions
Datasheet
22
Rev. 1.0, 2010-10-13
Open FBL
7
D6
Max Threshold = 1.0 V
TLD5098EL
Protection and Diagnostic Functions
Startup
Normal
Thermal Shutdown 1
Overvoltage 2
Open Load / Feedback 3
Shutdown
VIVCC
VIVCC,RTH,i VIVCC,RTH,d
Tj
Tj,SD
t
Tj,SD,HYST 1
VBO
VOVFB ≥ VOVFB,TH
VOVFB,HYS
2
t
VIN
VFBH-VFBL
VREF,2 tSS 0.3 V Typ VREF,1 tSS
3
t
t
VPWMO
t
Figure 12
Open load, Overvoltage and Overtemperature Timing Diagram
Datasheet
23
Rev. 1.0, 2010-10-13
TLD5098EL
Protection and Diagnostic Functions
VEN/PWMI
H L t
Tj
TjSD TjSO
ΔΤ
Ta
t
VSWO
t
ILED
Ipeak t
VPWMO
t
VIVCC
5V
t
Device OFF Normal Operation Overtemp Fault
ON
Overtemp ON Fault
Overtemp ON Fault
Overtemp Fault
Figure 13 Datasheet
Device overtemperature protection behavior 24 Rev. 1.0, 2010-10-13
TLD5098EL
Protection and Diagnostic Functions
example: VOUT,max=40V
1.25mA
VOVFB
VOVP,max
TLD5098
OVFB
9
ROVH
40V ≅ 33.2kΩ 1.25mA
Overvoltage Protection ACTIVE
VOVFB,TH 1.25V
ROVL
GND
12
1kΩ 1.25V
Overvoltage Protection is disabled t
Figure 14
Overvoltage Protection description
Short to GND protection for Highside Return Applications (B2B) from Figure 23 The FBH and FBL pins features a Short to GND detection threshold (VFBL,FBH_S2G). If the potential on those pins is below this threshold the Device stops his operation. This means that the PWMO signal changes to inactive state (LOW potential) and the corresponding p-channel (TDIM2) is switched OFF accordingly and protects the LED chain. For the B2B application some external components are needed to ensure a LOW potential during a short circuit event. D1 and D2 are low power diodes (BAS16-03W) and the resistor Rlim (10kOhm) is needed to limit the current through this path. The diode D3 should be a high power diode and is needed to protect the RFB and the FBH and FBL pins in case of an short circuit to GND event. This short circuit detection and protection concept considers potential faults for LED chains (LED Modules) which are separated from the ECU via two wires (at the beginning and at the end of the LED chain). If the short circuit condition disappears, the device will re-start with an soft start.
CBO D1 Rlim D2
wire harness LED Module wire harness
VFBL,FBH
60V TDIM2
Normal Operation
Vbb
CIN D3
RFB
Dn Short to GND
D1 Short to GND LBO DBO ILED ISW TSW VOUT 4.5V VFBL,FBH_S2G
TDIM1
PWMO FBH FBL IN
SWO SWCS SGND
D evice working with parameter deviations
Short Circuit detected on FBH/FBL
t
Figure 15 Datasheet
Short Circuit to GND Protection 25 Rev. 1.0, 2010-10-13
TLD5098EL
Protection and Diagnostic Functions
9.2
Table 5
Electrical Characteristics
EC Protection and Diagnosis
VIN = 8V to 34V; Tj = -40 ⋅C to +150 ⋅C, all voltages with respect to ground, positive current flowing into pin; (unless
otherwise specified) Pos. Parameter Symbol Min. Short Circuit Protection 9.2.1 FBH and FBL Short-Circuit fault VFBL,FBH_S2G 1.5 sensing common mode range – 2 V refer to Figure 15 VFBH=VFBL decreasing
1) 1)
Limit Values Typ. Max.
Unit
Conditions
Temperature Protection: 9.2.2 9.2.3 Over Temperature Shutdown Over Temperature Shutdown Hystereses Output Over Voltage Feedback Threshold Increasing Output Over Voltage Feedback Hysteresis Over Voltage Reaction Time Over Voltage Feedback Input Current Open Load/Feedback Threshold Open Feedback Threshold
Tj,SD Tj,SD,HYST
160 –
175 15
190 –
°C °C
refer to Figure 13
Overvoltage Protection: 9.2.4 9.2.5 9.2.6 9.2.7
VOVFB,TH VOVFB,HYS tOVPRR IOVFB
1.21 50 2 -1
1.25 – – 0.1
1.29 150 10 1
V mV µs µA
refer to Figure 14
1)
Output Voltage decreasing
Output Voltage decreasing
VOVFB = 1.25V
Open Load and Open Feedback Diagnostics 9.2.8
VREF,1,3
-100
–
-20
mV
refer to Figure 11 VREF = VFBH - VFBL Open Circuit 1 or 3
9.2.9
VREF,2
0.5
–
1
V
VREF = VFBH - VFBL
Open Circuit 2
1) Specified by design; not subject to production test.
Note: Integrated protection functions are designed to prevent IC destruction under fault conditions described in the data sheet. Fault conditions are considered as “outside” normal operating range. Protection functions are not designed for continuous repetitive operation.
Datasheet
26
Rev. 1.0, 2010-10-13
TLD5098EL
Analog Dimming
10
Analog Dimming
This pin is influencing the Feedback Voltage Error Amplifier by generating an internal current accordingly to an external reference voltage (VSET). If the analog dimming feature is not needed this pin must be connected to IVCC or external > 1.6V supply. Different application scenarios are described in Figure 18. This pin can also go outside of the ECU for instance if a thermistor is connected on a separated LED Module and the Analog Dimming Input is used to thermally protect the LEDs. For reverse battery protection of this pin an external series resistor should be placed to limit the current.
10.1
Purpose of Analog Dimming:
1) It is difficult for LED manufacturers to deliver LEDs which have the same Brightness, Colorpoint and Forward Voltage Class. Due to this relatively wide spread of the crucial LED parameters automotive customers order LEDs from one or maximum two different colorpoint classes. The LED manufacturer must preselect the LEDs to deliver the requested colorpoint class. Those preselected LEDs are matched in terms of the colorpoint but a variation of the brightness remains. To correct the brightness deviation an analog dimming feature is needed. The mean LED current can be adjusted by applying an external voltage VSET at the SET pin. 2) If the DC/DC application is separated from the LED loads the ECU manufacturers aim is to develop one hardware which should be able to handle different load current conditions (e.g. 80mA to 400mA) to cover different applications. To achieve this average LED current adjustment the analog dimming is a crucial feature.
10.2
Description
Application Example: Desired LED current = 400mA. For the calculation of the correct Feedback Resistor RFB the following equation can be used: This formula is valid if the analog dimming feature is disabled and VSET > 1.6V.
I LED =
V VREF 0.3V --> RFB = REF --> R = 750mΩ FB = I LED RFB 400mA
A decrease of the average LED current can be achieved by controlling the voltage at the SET pin (VSET) between 0V and 1.6V. The mathematical relation is given in the formula below:
I
LED
=
V
SET
− 0 ,1 V 5 * R FB
If VSET is 100mV the LED current is only determined by the internal offset voltages of the comparators. For this example ILED = 0A if VSET < 100mV. Refer to the concept drawing in Figure 17.
Datasheet
27
Rev. 1.0, 2010-10-13
TLD5098EL
Analog Dimming
VREF
[V]
typ. 300mV
100 mV
1.6V Analog Dimming Disabled
VSET
[V]
I LED = VREF RFB
Analog Dimming Feature Enabled V − 0.1V I LED = SET 5 * RFB
Figure 16
Voltage VSET versus LED current
VREF VOUT RFB
FBL
7 6
ILED
FBH
IFBL R2 VREF_offset
IFBH R1
Vint
VBandgap = 1.6V + + ISET n*ISET R3 ISET
SET
10
+
-
VSET
Feedback Voltage Error Amplifier
100mV
COMP
8 12
GND
CCOMP
RCOMP
Figure 17 Datasheet
Concept Drawing Analog Dimming 28 Rev. 1.0, 2010-10-13
TLD5098EL
Analog Dimming Multi-purpose usage of the Analog dimming feature 1) A µC integrated digital analog converter (DAC) output or a stand alone DAC can be used to supply the SET pin of the TLD5098EL. The integrated voltage Regulator (VIVCC) can be used to supply the µC or external components if the current consumption does not exceed 25mA. 2) The analog dimming feature is directly connected to the input voltage of the system. In this configuration the LED current is reduced if the input voltage VIN is decreasing. The DC/DC boost converter is changing (increasing) the switching duty cycle if VIN drops to a lower potential. This is causing an increase of the input current consumption. If applications require a decrease of the LED current in respect to VIN variations this setup can be choosen. 3) The usage of an external resistor divider connected between IVCC (integrated 5V regulator output and gate buffer pin) SET and GND can be choosen for systems without µC on board. The concept allows to control the LED current via placing cheap low power resistors. Furthermore a temperature sensitive resistor (Thermistor) to protect the LED loads from thermal destruction can be connected additionally. 4) If the analog dimming feature is not needed the SET pin must be connected directly to >1.6V potential (e.g. IVCC potential) 5) Instead of an DAC the µC can provide a PWM signal and an external R-C filter is producing a constant voltage for the analog dimming. The voltage level is depending on the PWM frequency (fPWM) and duty cycle (DC) which can be controlled by the µc software after reading the coding resistor placed at the LED module.
Datasheet
29
Rev. 1.0, 2010-10-13
TLD5098EL
Analog Dimming .
1
D/A-Output
10
+5V CIVCC
1
2
Vbb
14
IVCC SET
RSET2
SET
IN
µC
10
VSET
GND
12
VSET RSET1
Cfilter
GND
12
3
VIVCC = +5V RSET2 CIVCC
10 1
4
IVCC
VIVCC = +5V Rfilter CIVCC
1
IVCC
SET GND
12
10
SET GND
12
VSET RSET1
Cfilter
VSET ~ VIVCC
Cfilter
5
+5V CIVCC
PWM
1
IVCC
PWM output
10
Rfilter
SET
µC (e.g. XC866)
Cfilter
VSET
GND
12
Figure 18
Analog Dimming in various applications
Datasheet
30
Rev. 1.0, 2010-10-13
TLD5098EL
Analog Dimming
10.3
Table 6
Electrical Characteristics
EC Analog Dimming
VIN = 8V to 34V; Tj = -40 ⋅C to +150 ⋅C, all voltages with respect to ground, positive current flowing into pin; (unless
otherwise specified) Pos. Parameter Symbol Min. Analog Dimming Range 10.3.1 SET programming range Limit Values Typ. – Max. 1.6 V
1)
Unit
Conditions
VSET
0
refer to Figure 16
1) Specified by design; not subject to production test.
Datasheet
31
Rev. 1.0, 2010-10-13
TLD5098EL
Application Information
11
Application Information
Note: The following information is given as a hint for the implementation of the device only and shall not be regarded as a description or warranty of a certain functionality, condition or quality of the device.
IBO DRV VBATT C1 C2 TSW
2
L1 CIN
VIN
LBO
DBO ISW
VBO CBO
RFB
IN IVCC SWO SWCS
VREF
14
Provisional Parts
1
4
D1 RCS D2 ROVH Classic Boost Setup: VOUT > VIN D3 D4
CIVCC VCC or V IVCC SGND PWM PWM - Output
10 3
Rfilter
SET
OVFB
9
IC2 Microcontroller (e.g. XC866)
Output Input Output
Cfilter
IC1 TLD5098
13 11 8
ROVL
D5 D6 D7 D8
EN / PWMI FREQ / SYNC COMP FBH FBL
6
D9
7
ILED
TDIM
D10
CCOMP PWMO RFREQ RCOMP GND
12 5
Figure 19
LED Low Side Return Application Circuit (Boost to GND, B2G)
Part Number LW W5SM SS3H10 EEEFK1H101GP X7R
MLCC CCNPZC105KBW X7R
Reference Designator D1 - 10 DBO CIN , CBO CCOMP CIVCC IC1 IC2 LBO RCOMP RFB RFREQ ROVH ROVL RCS TDIM,TSW
Value White Schottky, 3 A, 100 VR 100 uF, 50V 10 nF 1uF , 6.3V --100 uH 10 kΩ, 1% 820 mΩ, 1% 20 kΩ, 1% 33.2 kΩ, 1% 1 kΩ, 1% 50 mΩ, 1%
Dual N-ch enh. (60V, 20A) alternativ: 100V N-ch, 35A
Manufacturer Osram Vishay Panasonic EPCOS EPCOS Infineon Infineon Coilcraft Panasonic Panasonic Panasonic Panasonic Panasonic Panasonic Infineon Infineon Infineon
Type LED Diode Capacitor Capacitor Capacitor IC IC Inductor Resistor Resistor Resistor Resistor Resistor Resistor Transistor Transistor Transistor
Quantity 10 1 2 1 1 1 1 1 1 1 1 1 1 1 1 2 2
TLD5098 XC866 MSS1278T-104ML ERJ3EKF1002V ERJ14BQFR82U ERJ3EKF2002V ERJ3EKF3322V ERJ3EKF1001V ERJB1CFR05U IPG20N06S4L-26 IPD35N10S3L-26 BSP318S
alternativ : 60V N-ch, 2.6A
Figure 20 Datasheet
Bill of Materials for LED Low Side Return Application Circuit 32 Rev. 1.0, 2010-10-13
TLD5098EL
Application Information
Lfilter DRV VBATT C1 C2 CIN VIN
L1
CSEPIC
DBO
ISW L2 SWO SWCS TSW
2
RFB
CBO
VREF
14
IN
Provisional Parts
4
ILED
RCS D1 ROVH
VCC or V IVCC SGND PWM PWM - Output Rfilter
10 3
SET
OVFB
9
IC2 Microcontroller (e.g. XC866)
Output Input Output
Cfilter
IC1 TLD5098
13 11 8
ROVL
EN / PWMI FREQ / SYNC COMP FBH FBL
6
Number of LEDs could be variable! This means the following configurations are possible: 1) VOUT < VIN (Buck) 2) VOUT > VIN (Boost)
7
CCOMP IVCC RFREQ RCOMP PWMO GND
12 5 1
BAS1603W DPOL CIVCC
RPOL 10kΩ
Dn
Startup Circuit TDIM
Figure 21
SEPIC Application Circuit
Value White Schottky, 3 A, 100 VR 3.3 uF, 20V 100 uF, 50V 10 nF 1uF , 6.3V --47 uH
alternativ: 22uH coupled inductor
Reference Designator D1 - n DBO CSEPIC CIN , CBO CCOMP CIVCC IC1 IC2 L1 , L2
Manufacturer Osram Vishay EPCOS Panasonic EPCOS EPCOS Infineon Infineon Coilcraft Coilcraft Panasonic Infineon Panasonic Panasonic Panasonic Panasonic Panasonic Infineon Infineon Infineon
Part Number LW W5SM SS3H10 X7R, Low ESR EEEFK1H101GP X7R
MLCC CCNPZC105KBW X7R
Type LED Diode Capacitor Capacitor Capacitor Capacitor IC IC Inductor Inductor Resistor Diode Resistor Resistor Resistor Resistor Resistor Transistor Transistor Transistor
Quantity variable 1 1 2 1 1 1 1 2 1 2 1 1 1 1 1 1 1 2 2
TLD5098 XC866 MSS1278T-473ML MSD1278-223MLD ERJ3EKF1002V BAS1603W ERJ14BQFR82U ERJ3EKF2002V ERJ3EKF3322V ERJ3EKF1001V ERJB1CFR05U IPG20N06S4L-26 IPD35N10S3L-26 BSP318S
RCOMP, RPOL DPOL RFB RFREQ ROVH ROVL RCS TDIM,TSW
10 kΩ, 1% 80V Diode 820 mΩ , 1% 20 kΩ, 1% 33.2 k Ω, 1% 1 kΩ, 1% 50 mΩ, 1%
Dual N-ch enh. (60V, 20A) alternativ: 100V N-ch, 35A
alternativ : 60V N-ch, 2.6A
Figure 22 Datasheet
Bill of Materials for SEPIC Application Circuit 33 Rev. 1.0, 2010-10-13
TLD5098EL
Application Information
CBO DSC1: Low Power Diode Rlim:10kΩ range DSC2: Low Power Diode
VIN DRV VBATT C1 C2 L1 CIN D3 Power Schottky Diode
RFB
TDIM2 Dn VOUT is always higher than VIN Therefore: Number of LEDs could be variable! Short to GND Short to GND D1 DZ
RDIM2
RDIM1
Provisional Parts
LBO TDIM1
5
DBO I SW
I LED
VOUT PWMO SWO SWCS
6 2 4
TSW
FBH FBL IN SET SGND OVFB
3
R CS ROVH
VCC or V IVCC PWM PWM-Output
7 14 10
9
IC2 Microcontroller (e.g. XC866)
Input Output Output
Rfilter
Cfilter
IC1 TLD5098
13 11
ROVL
EN / PWMI FREQ / SYNC COMP
8
IVCC
1
C COMP CIVC C
RFREQ
GND
12
R COMP
Figure 23
LED High Side Return Application Circuit (Boost to Vbb, B2B)
Reference Designator D1 - n DBO , D3 DSC1 , DSC2 DZ CBO CIN CCOMP CIVCC IC1 IC2 LBO Value White Schottky, 3 A, 100 VR Low Power Diode Zener Diode 100 uF, 80V 100 uF, 50V 10 nF 1 uF, 6.3V --100 uH 10 kΩ, 1% 820 mΩ, 1% 20 kΩ, 1% 33.2 kΩ, 1% 1 kΩ, 1% 50 mΩ, 1% 60V Dual N-ch (3.1A) and P-ch. enh. (2A)
alternativ: 100V N-ch (0.37A), alternativ: 60V P-ch (1.9A)
Manufacturer Osram Vishay Infineon -Panasonic Panasonic EPCOS EPCOS Infineon Infineon Coilcraft Panasonic Panasonic Panasonic Panasonic Panasonic Panasonic Infineon Infineon Infineon Infineon Infineon Infineon
Part Number LW W5AP SS3H10 BAS16-03W -EEVFK1K101Q EEEFK1H101GP X7R
MLCC CCNPZC105KBW X7R
Type Diode Diode Diode Diode Capacitor Capacitor Capacitor Capacitor IC IC Inductor Resistor Resistor Resistor Resistor Resistor Resistor Transistor Transistor Transistor Transistor Transistor Transistor
Quantity
variable
2 2 1 1 1 1 1 1 1 1 4 1 1 1 1 1 1 1 1
AppDiagLED _HSR_HSSBOM .vsd
TLD5098 XC866 MSS1278T-104ML_ ERJ3EKF1002V ERJ14BQFR82U ERJ3EKF2002V ERJP06F5102V ERJ3EKF1001V ERJB1CFR05U BSO615CG BSP123 BSP171P IPD35N10S3L-26 IPD30N06S4L-23 BSP318S
RCOMP, RDIM1, RDIM2, Rlim RFB RFREQ ROVH ROVL RCS TDIM1,TDIM2
TSW
N-ch, OptiMOS-T2 100V, 35A alternativ: 60V N-ch, 30A
1 1 1
alternativ : 60V N-ch, 2.6A
Figure 24 Datasheet
Bill of Materials for LED High Side Return Application Circuit 34 Rev. 1.0, 2010-10-13
TLD5098EL
Application Information
IBO DRV VBATT C1 C2 SWO
14 2
L1 CIN
VIN
LBO ISW
DBO
VBO CBO
ILoad constant VOUT
RL TSW
IN IVCC SWCS
4
Provisional Parts
CIVCC
VCC or V IVCC PWM
1
RCS
3
SGND
10
ROVH
IC2 Microcontroller (e.g. XC866)
Input Output Output
Rfilter
SET
OVFB
9
Cfilter
5
PWMO
IC1 TLD5098
FBH
6
ROVL
RFB1
13 11 8
EN / PWMI FREQ / SYNC COMP FBL
7
RFB2
VREF
CCOMP
RFREQ
RCOMP
GND
12
RFB3
Figure 25
Boost Voltage Application Circuit
Part Number SS3H10 EEVFK1K101Q EEEFK1H101GP TBD EEFHD0J101R TLD5098 XC886 MSS1278T-104ML_ TBD ERJ3EKF5102V ERJ3EKF1001V ERJ3EKF2002V ERJP06F5102V ERJ3EKF1001V ERJB1CFR05U IPD22N08S2L-50
Reference Designator DBO CBO CIN CCOMP CIVCC IC1 IC2 LBO RCOMP RFB1,RFB3 RFB2 RFREQ ROVH ROVL RCS TSW
Value Schottky, 3 A, 100 VR 100 uF, 80V 100 uF, 50V 10 nF 100 uF, 6.3V --100 uH 10 kΩ 51 kΩ, 1% 1 kΩ, 1% 20 kΩ, 1% 51 kΩ, 1% 1 kΩ, 1% 50 mΩ, 1% N-ch, 75 V, 65 mΩ
Manufacturer Vishay Panasonic Panasonic TBD Panasonic Infineon Infineon Coilcraft TBD Panasonic Panasonic Panasonic Panasonic Panasonic Panasonic Infineon
Type Diode Capacitor Capacitor Capacitor Capacitor IC IC Inductor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Transistor
Quantity 1 1 1 1 1 1 1 1 1 1 1 2 1 1 1 1
Figure 26
Bill of Materials for Boost Voltage Application Circuit
Note: This is a very simplified example of an application circuit. The function must be verified in the real application. Datasheet 35 Rev. 1.0, 2010-10-13
TLD5098EL
Application Information
11.1
Further Application Information
In fixed frequency mode where an external resistor configures the switching frequency the minimum boost inductor is given by the formula in Figure 27. • • • • LMIN = Minimum Inductance Required During Fixed Frequency Operation VBO = Boost Output Voltage RCS = Current Sense Resistor fFREQ = Switching Frequency
V BO [ V ] × R CS [ Ω ] L MIN ≥ ------------------------------------------------------------------–3 106 ×10 [ V ] × f FREQ [ Hz ]
Figure 27 Minimum Inductance Required During Fixed Frequency Operation (B2G configuration)
In synchronization mode where an external clock source configures the switching frequency the minimum boost inductor is given by the formula in Figure 28. • • • LSYNC = Minimum Inductance Required During Synchronization Operation VBO = Boost Output Voltage RCS = Current Sense Resistor
V BO [ V ] × R CS [ Ω ] ----------------------------------------------------------L SYNC ≥ –3 106 ×10 [ V ] × 250kHz
Figure 28 • • •
Minimum Inductance Required During Synchronization Operation (B2G configuration)
Please contact us for information regarding the FMEA pin. Existing App. Note (Title) For further information you may contact http://www.infineon.com/
Datasheet
36
Rev. 1.0, 2010-10-13
TLD5098EL
Package Outlines
12
Package Outlines
0.35 x 45˚
Stand Off (1.45)
1.7 MAX.
3.9 ±0.11)
0.1 C D
0 ... 0.1
0.19 +0.06
0.08 C 6 ±0.2
0.65 0.25 ±0.05 2)
C
0.64 ±0.25
D 0.2
8˚ MAX.
M
0.15 M C A-B D 14x
D 8x
A
14 8
Bottom View 3 ±0.2
1 7
1
7
B 0.1 C A-B 2x
Exposed Diepad
14
8
4.9 ±0.11)
Index Marking
1) Does not include plastic or metal protrusion of 0.15 max. per side 2) Does not include dambar protrusion
PG-SSOP-14-1,-2,-3-PO V02
2.65 ±0.2
PG-SSOP-14
Figure 29
PG-SSOP-14
Green Product (RoHS compliant) To meet the world-wide customer requirements for environmentally friendly products and to be compliant with government regulations the device is available as a green product. Green products are RoHS-Compliant (i.e Pb-free finish on leads and suitable for Pb-free soldering according to IPC/JEDEC J-STD-020).
For further package information, please visit our website: http://www.infineon.com/packages. Datasheet 37
Dimensions in mm Rev. 1.0, 2010-10-13
TLD5098EL
Revision History
13
Revision 1.0
Revision History
Date 2010-10-13 Changes Initial Datasheet
Datasheet
38
Rev. 1.0, 2010-10-13
Edition 2010-10-13 Published by Infineon Technologies AG 81726 Munich, Germany © 2010 Infineon Technologies AG All Rights Reserved. Legal Disclaimer The information given in this document shall in no event be regarded as a guarantee of conditions or characteristics. With respect to any examples or hints given herein, any typical values stated herein and/or any information regarding the application of the device, Infineon Technologies hereby disclaims any and all warranties and liabilities of any kind, including without limitation, warranties of non-infringement of intellectual property rights of any third party. Information For further information on technology, delivery terms and conditions and prices, please contact the nearest Infineon Technologies Office (www.infineon.com). Warnings Due to technical requirements, components may contain dangerous substances. For information on the types in question, please contact the nearest Infineon Technologies Office. Infineon Technologies components may be used in life-support devices or systems only with the express written approval of Infineon Technologies, if a failure of such components can reasonably be expected to cause the failure of that life-support device or system or to affect the safety or effectiveness of that device or system. Life support devices or systems are intended to be implanted in the human body or to support and/or maintain and sustain and/or protect human life. If they fail, it is reasonable to assume that the health of the user or other persons may be endangered.
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