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12-channel automotive 40V highside LED driver with flexwire interface

Availability: 1


Package | PIN: HTSSOP (PWP) | 24
Temp: Q (-40 to 125)
Package qty | Carrier: 2,000 | LARGE T&R
Qty Price
1-99 $2.49
100-249 $2.18
250-999 $1.53
1,000+ $1.23


  • AEC-Q100-qualified for automotive applications:
    • Temperature grade 1: –40°C to +125°C, TA
  • Functional safety capable
    • Documentation available to aid functional safety systemdesign
  • 12-Channel precision high-side current output:
    • Supply voltage 4.5 V to 40 V
    • Up to 75 mA channel current set by resistor
    • 2-Bit global, 6-bit independent current setting
    • High current accuracy < ±5% at 5 mA to 75 mA
    • High current accuracy < ±10% at 1 mA
    • Low voltage drop 500 mV at 50 mA
    • 12-Bit independent PWM dimming
    • Programmable PWM frequency up to 20 kHz
    • Linear and exponential dimmingmethod
  • FlexWire control interface
    • Up to 1-MHz clock frequency
    • Maximum 16 devices on one FlexWire bus
    • Up to 8 bytes data transaction in one frame
    • 5-V LDO output to supply CANtransceiver
  • Diagnostic and protection:
    • Programmable fail-safe state
    • LED open-circuit detection
    • LEDshort-circuit detection
    • Single-LED short-circuitdiagnostic
    • Programmable low-supply detection
    • Open-drain ERR for faultindication
    • Watchdog and CRC for FlexWire interface
    • 8-Bit ADC for pin voltage measurement
    • Overtemperature protection

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Texas Instruments  PTPS929120QPWPRQ1

With increasing demand for animation in automotive lighting, LEDs must be controlledindependently. Therefore, LED drivers with digital interfaces are essential to effectively drivepixel-controlled lighting applications. In exterior lighting, multiple lamp functions are typicallylocated on different PCB boards with off-board wires connected to each other. It is difficult for atraditional single-ended interface to meet the strict EMC requirements. By using anindustrial-standard CAN physical layer, the UART-based FlexWire interface of the TPS929120-Q1easily accomplishes long distance off-board communication without impacting EMC.

The TPS929120-Q1 is a 12-channel, 40-V high-side LED driver that controls the 8-bitoutput current and 12-bit PWM duty cycles. The device meets multiple regulation requirements withLED open-circuit, short-to-ground, and single LED short-circuit diagnostics. A configurablewatchdog also automatically sets fail-safe states when the MCU connection is lost, and, withprogrammable EEPROM, TPS929120-Q1 can flexibly be set for different applicationscenarios.