TPS929121 Series
12-channel automotive 40-V high-side LED driver with FlexWire interface
Manufacturer: Texas Instruments
Catalog(1 parts)
| Part | Dimming | Current - Output / Channel▲▼ | Number of Outputs▲▼ | Supplier Device Package | Operating Temperature▲▼ | Operating Temperature▲▼ | Grade | Frequency▲▼ | Frequency▲▼ | Voltage - Supply (Max)▲▼ | Voltage - Supply (Min)▲▼ | Qualification | Voltage - Output▲▼ | Voltage - Output▲▼ | Package / Case | Package / Case▲▼ | Package / Case▲▼ | Type | Mounting Type | Internal Switch(s)▲▼ | Topology |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Texas Instruments TPS929121QPWPRQ1LED Driver IC 12 Output Linear Constant Current Analog, PWM Dimming 75mA 24-HTSSOP | Analog, PWM | 0.07500000298023224 A | 12 ul | 24-HTSSOP | -40 °C | 125 °C | Automotive | 1000000 Hz | 10000 Hz | 40 V | 4.5 V | AEC-Q100 | 5 V | 0 V | 24-PowerTSSOP | 0.004394200164824724 m | 0.004399999976158142 m | Linear | Surface Mount | Constant Current |
Key Features
• AEC-Q100-qualified for automotive applications:Temperature grade 1: –40°C to +125°C, TA12-channel precision high-side current output:Supply voltage 4.5 V to 40 VUp to 75-mA channel current set by resistor2-bit global, 6-bit independent current settingHigh current accuracy < ±5% at 5 mA to 75 mAHigh current accuracy < ±10% at 1 mALow voltage drop 500 mV at 50 mA12-bit independent PWM dimmingProgrammable PWM frequency up to 20 kHzLinear and exponential dimming methodFlexWire control interfaceUp to 1-MHz clock frequencyMaximum 16 devices on one FlexWire busUp to 8-bytes data transaction in one frame5-V LDO output to supply CAN transceiverDiagnostic and protection:Programmable fail-safe stateLED open-circuit detectionLED short-circuit detectionSingle-LED short-circuit diagnosticProgrammable low-supply detectionOpen-drainERRfor fault indicationWatchdog and CRC for FlexWire interface8-Bit ADC for pin voltage measurementOvertemperature protectionAEC-Q100-qualified for automotive applications:Temperature grade 1: –40°C to +125°C, TA12-channel precision high-side current output:Supply voltage 4.5 V to 40 VUp to 75-mA channel current set by resistor2-bit global, 6-bit independent current settingHigh current accuracy < ±5% at 5 mA to 75 mAHigh current accuracy < ±10% at 1 mALow voltage drop 500 mV at 50 mA12-bit independent PWM dimmingProgrammable PWM frequency up to 20 kHzLinear and exponential dimming methodFlexWire control interfaceUp to 1-MHz clock frequencyMaximum 16 devices on one FlexWire busUp to 8-bytes data transaction in one frame5-V LDO output to supply CAN transceiverDiagnostic and protection:Programmable fail-safe stateLED open-circuit detectionLED short-circuit detectionSingle-LED short-circuit diagnosticProgrammable low-supply detectionOpen-drainERRfor fault indicationWatchdog and CRC for FlexWire interface8-Bit ADC for pin voltage measurementOvertemperature protection
Description
AI
With increasing demand for animation in automotive lighting, LEDs must be controlled independently. Therefore, LED drivers with digital interfaces are essential to effectively drive pixel-controlled lighting applications. In exterior lighting, multiple lamp functions are typically located on different PCB boards with off-board wires connected to each other. It is difficult for a traditional single-ended interface to meet the strict EMC requirements. By using an industrial-standard CAN physical layer, the UART-based FlexWire interface of the TPS929121-Q1 easily accomplishes long distance off-board communication without impacting EMC.
The TPS929121-Q1 is a 12-channel, 40-V high-side LED driver that controls the 8-bit output current and 12-bit PWM duty cycles. The device meets multiple regulation requirements with LED open-circuit, short-to-ground, and single LED short-circuit diagnostics. A configurable watchdog also automatically sets fail-safe states when the MCU connection is lost, and, with programmable EEPROM, TPS929121-Q1 can flexibly be set for different application scenarios.
With increasing demand for animation in automotive lighting, LEDs must be controlled independently. Therefore, LED drivers with digital interfaces are essential to effectively drive pixel-controlled lighting applications. In exterior lighting, multiple lamp functions are typically located on different PCB boards with off-board wires connected to each other. It is difficult for a traditional single-ended interface to meet the strict EMC requirements. By using an industrial-standard CAN physical layer, the UART-based FlexWire interface of the TPS929121-Q1 easily accomplishes long distance off-board communication without impacting EMC.
The TPS929121-Q1 is a 12-channel, 40-V high-side LED driver that controls the 8-bit output current and 12-bit PWM duty cycles. The device meets multiple regulation requirements with LED open-circuit, short-to-ground, and single LED short-circuit diagnostics. A configurable watchdog also automatically sets fail-safe states when the MCU connection is lost, and, with programmable EEPROM, TPS929121-Q1 can flexibly be set for different application scenarios.