L99LD01 ,High Efficiency Constant Current Led DriverApplicationsAutomotive day time running light, LED • Automotive qualifiedHeadLamps• Constant curren ..
L99MC6-LF , Configurable 6-channel device
L99MD01XPTR ,Standard Functions, Motor DriversAbsolute maximum ratings . 13Table 5. ESD protection . . 13Table 6. Operating junction ..
L99PD08 ,AMICO 8 Channel Pre Diagnosis Device
L99PM62GXP ,Power Management IC with LIN and high speed CANBlock diagram and pin descriptions . . . . 92 Detailed description 122.1 Voltage regulator ..
L99PM62XP ,Power management IC with LIN and high speed CANBlock diagram and pin descriptions . . . . 92 Description 122.1 Voltage regulators . ..
LC7533 ,3V Electronic Volume ControlPin AssignmentNote 1 : No bonding exists on the inside of NC pin.It is recommended that the outside ..
LC75341 ,Single-Chip Volume and Tone Control SystemAbsolute Maximum Ratings at Ta = 25°C, V = 0 VSSParameter Symbol Pin Conditions Ratings UnitMaximum ..
LC75341 ,Single-Chip Volume and Tone Control SystemElectrical Characteristics at Ta = 25°C, V = 9 V, V = 0 VDD SSInput BlockRatingsParameter Symbol Pi ..
LC75341M ,Single-Chip Volume and Tone Control SystemElectrical Characteristics at Ta = 25°C, V = 9 V, V = 0 VDD SSInput BlockRatingsParameter Symbol Pi ..
LC75342 ,Single-Chip Volume and Tone Control SystemElectrical Characteristics at Ta = 25°C, V = 9 V, V = 0 VDD SSInput BlockRatingsParameter Symbol Pi ..
LC75343 ,Electronic Volume Control System on-ChipFeatures• On-chip buffer amplifier cuts down number of externalFunctionscomponents • Volume: 0 dB t ..
L99LD01
High Efficiency Constant Current Led Driver
June 2014 DocID025319 Rev 1 1/69
L99LD01High efficiency constant current LED driver for automotive
applications
Datasheet - preliminary data
Features Automotive qualified Constant current operation Current LED settable by external sensing
resistor and adjustable via SPI Converter switching frequency adjustable by
external resistor (RSF) EMC reduction by internal spread spectrum
dither oscillator Low frequency PWM dimming operation. Maximum input current limiter Maximum switching duty cycle limiter Slope compensation adjustable by external
resistor (R9) Battery overvoltage shut down protection (ext.
R3, R4 resistors required) Led chain OV detection (ext. R5, R6) Multiplexed output for monitoring and control of
LED temperature (external NTC resistor
required), voltage of LED chain, and low
frequency PWM SPI communication serial interface transceiver
(SDI, SDO, SCK, CSN) Regulated output for micro supply 5 V ± 2%
-20 mA Parameter programming and settings of
internal memory registers by the dedicated SPI
interface: LED current reference adjusting (± 66.7 %) Maximum input current limiter reference
adjusting (± 55.5 %) Random dither frequency sweeping,
modulation frequency and deviation
percentage Power on reset pin output ESD protection
ApplicationsAutomotive day time running light, LED
HeadLamps
DescriptionL99LD01 is a complete constant current DC–DC
converter LED driver, manufactured in a BCD5S V technology and assembled in a LQFP32™
package.
The device is designed to be used in Boost, Buck-
Boost and Fly back converter topologies. An
internal random dither oscillator works in low
frequency modulation, allowing the RF spectrum
of the switching frequency to spread so to reduce
EMC emissions. The slope compensation
ensures good converter loop stability whatever is
the duty cycle needed by the application.
The converter is able to work either in full power
mode or in low frequency dimming mode.
The device includes an internal low drop voltage
regulator, that can be used to supply a
microcontroller, and a reset pin, that is useful for
resetting the microcontroller at the start up and
every time that the regulated output voltage falls
down below an established voltage threshold.
Contents L99LD012/69 DocID025319 Rev 1
Contents Block diagram and pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82.1 Operating modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.1.1 Operation with an external microcontroller . . . . . . . . . . . . . . . . . . . . . . . 8
2.1.2 Stand alone operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.1.3 Start-up fail . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.1.4 Normal mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.1.5 Software limp home . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.1.6 Limp home mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.2 Protections and functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
2.2.1 LED current adjust and temperature control . . . . . . . . . . . . . . . . . . . . . 16
2.2.2 Slope compensation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
2.2.3 LED chain overvoltage detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
2.2.4 Battery overvoltage shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
2.2.5 Regulators thermal shut down . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
2.2.6 Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
2.2.7 Watchdog . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
2.2.8 Standby and wake up by ENABLE pin . . . . . . . . . . . . . . . . . . . . . . . . . . 20
2.2.9 Frequency setting and dither effect . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
2.2.10 Start up LED overvoltage management . . . . . . . . . . . . . . . . . . . . . . . . . 23
2.2.11 Programming the over/under voltage threshold . . . . . . . . . . . . . . . . . . . 27
2.2.12 Input overvoltage programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
SPI functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 313.1 Serial peripheral interface (ST SPI standard) . . . . . . . . . . . . . . . . . . . . . . 31
3.2 Signal description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
3.3 SPI protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
3.3.1 SDI, SDO format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
3.3.2 Global status byte description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
3.3.3 Operating code definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
3.4 Address mapping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
3.5 Control registers (RAM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
3.6 Status registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
DocID025319 Rev 1 3/69
L99LD01 Contents Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 444.1 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46 SPI electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 546.1 DC characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
6.2 AC characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
6.3 Dynamic characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Application circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59 Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 658.1 ECOPACK® . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
8.2 LQFP32™ package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Order codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
List of tables L99LD01
4/69 DocID025319 Rev 1
List of tables
Table 1. Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Table 2. Limp home mode: recovery paths . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Table 3. Suggested KL value and overvoltage thresholds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Table 4. Command byte (8 bit) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Table 5. Input data byte . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Table 6. Global status byte . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Table 7. Output data byte . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Table 8. Global status byte . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Table 9. Operation code definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Table 10. RAM memory map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Table 11. ROM memory map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Table 12. Internal oscillator frequency deviation settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Table 13. Internal oscillator frequency modulation settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Table 14. Watchdog timer status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Table 15. Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Table 16. Thermal data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Table 17. VS and VCC1 pin characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Table 18. VCC2 and C5V pin characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Table 19. NRES and LMODE pin characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Table 20. G1 driver 1 pin characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Table 21. G2 pin characteristics (driver2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Table 22. Converter oscillator and RSF pin characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Table 23. PWM_L, PWM, MOUT pin characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Table 24. ISENSE+, ISENSE- pin, and O.T.A. characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Table 25. SC pin characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Table 26. VLED pin characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Table 27. INP_OV pin characteristics (input overvoltage shut down). . . . . . . . . . . . . . . . . . . . . . . . . 52
Table 28. NTC pin characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Table 29. ENABLE, LHM pin characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Table 30. Power on reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Table 31. Watchdog and timers parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Table 32. SPI DC characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Table 33. SPI AC characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Table 34. SPI dynamic characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Table 35. LQFP32™ mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
Table 36. Device summary. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Table 37. Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
DocID025319 Rev 1 5/69
L99LD01 List of figures
List of figures
Figure 1. Block diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Figure 2. Connection diagram (top view – not in scale). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Figure 3. Operating modes, main states . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Figure 4. Normal start up vs VS ramp up and VCC1 voltage dips. . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Figure 5. VCC1_FAIL or VCC1 reset under voltage (VS >VSMIN) at start up . . . . . . . . . . . . . . . . . . . . 14
Figure 6. VCC1 reset under voltage at start up (VS < VSMIN) and fast VS ramp down . . . . . . . . . . . . 15
Figure 7. Slow vs ramp down. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Figure 8. Internal structure of the slope compensation circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Figure 9. Operation with a standalone LIN and ENABLE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Figure 10. Operation with PM device and ENABLE (FSO active Low) . . . . . . . . . . . . . . . . . . . . . . . . 21
Figure 11. Internal structure of main converter oscillator. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Figure 12. Converter frequency range vs RSF and IRSF vs frequency. . . . . . . . . . . . . . . . . . . . . . . . . 23
Figure 13. Correct start UP with no LED overvoltage failure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Figure 14. LED overvoltage after tDStart. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Figure 15. Device behavior in case the low to high transition of PWM_L signal happens after tDStart
expiration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Figure 16. LED overvoltage event not caused by a VS overvoltage event . . . . . . . . . . . . . . . . . . . . . 26
Figure 17. LED overvoltage detection due to a possible battery VS overvoltage . . . . . . . . . . . . . . . . 27
Figure 18. Behavior of LED overvoltage recovery bit with low on-time of PWM_L . . . . . . . . . . . . . . . 27
Figure 19. LED chain overvoltage thresholds settings. An example for boost and fly back
converters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Figure 20. Input overvoltage programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Figure 21. Clock polarity and clock phase . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Figure 22. SPI global error information output. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Figure 23. SPI write operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Figure 24. SPI read operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Figure 25. SPI read and clear operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Figure 26. SPI read device information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Figure 27. Principle of the WD_Status bits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Figure 28. Voltage and current conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Figure 29. SPI timing parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Figure 30. SPI input and output timing parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Figure 31. SPI maximum clock frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Figure 32. NRES pin open drain structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Figure 33. Handshake procedure at start up with microcontroller on board . . . . . . . . . . . . . . . . . . . . 58
Figure 34. Boost application circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Figure 35. Fly back application circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Figure 36. Buck-boost application circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Figure 37. Stand alone application example for boost topology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
Figure 38. Reverse battery protection: an example for boost topology . . . . . . . . . . . . . . . . . . . . . . . . 63
Figure 39. External MOS required during PWM dimming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Figure 40. LQFP32™ package dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
