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Texas Instruments TPS929120QPWPRQ1
- Part No.:
- TPS929120QPWPRQ1
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 24-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TPS929120QPWPRQ1.pdf
- Description:
- IC LED DRIVER RGLTR PWM 24HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,185
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Product details
Overview
TPS929120QPWPRQ1 from Texas Instruments is an AEC-Q100 Grade 1 (–40°C to +125°C) 12-channel automotive high-side LED driver with FlexWire interface, 4.5 V–40 V supply range, ±5% current accuracy at 5–75 mA per channel, 12-bit independent PWM dimming up to 20 kHz, and integrated 5-V/80-mA LDO for CAN transceiver support - deployed in pixel-controlled rear lighting systems.
For engineers reviewing the TPS929120QPWPRQ1 datasheet, TPS929120QPWPRQ1 pinout, TPS929120QPWPRQ1 application, or TPS929120QPWPRQ1 equivalent, key selection considerations include fail-safe state programmability via EEPROM, single-LED short-circuit diagnostics, FlexWire bus scalability (up to 16 devices), and thermal protection with 160°C overtemperature shutdown.
Technical Context
The TPS929120QPWPRQ1 implements a UART-based FlexWire interface using a synchronization frame to eliminate external crystals, supports multi-device daisy-chaining with CRC and watchdog, and embeds a fail-safe state machine that auto-enters preconfigured output states on MCU communication loss. Its 12 high-side current sources feature dual-stage current control: 2-bit global + 6-bit per-channel scaling, enabling precise analog current setting and independent 12-bit PWM dimming.
Diagnostics include LED open-circuit detection (200–600 mV threshold), short-to-ground (0.8–1.3 V), single-LED short-circuit via ADC voltage sampling, and programmable low-supply detection. The integrated 5-V LDO delivers up to 80 mA with 0.6 V dropout at 50 mA and supports external CAN transceivers without additional regulators.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 40 V - directly interfaces automotive battery rail without pre-regulation |
| Channel Current Accuracy | ±5% at 5–75 mA - ensures consistent luminance across 12 LED strings in safety-critical lighting |
| PWM Resolution & Frequency | 12-bit independent dimming, up to 20 kHz - eliminates audible noise and enables smooth animation |
| FlexWire Interface | Up to 1 MHz clock, 8-byte frames, 16-device bus - enables robust off-board communication meeting EMC requirements |
| LDO Output | 5 V ±5%, 80 mA max - powers external CAN transceivers (e.g., TCAN1042) with no secondary regulator |
| Diagnostic Coverage | LED open, short-to-ground, single-LED short, overtemperature (160°C), and supply UVLO - supports ASIL-B functional safety design |
| Fail-Safe Operation | EEPROM-programmable states with one-fails-all-fail or one-fails-others-on logic - maintains defined lighting behavior during MCU failure |
Pinout & Package
TPS929120QPWPRQ1 is housed in a thermally enhanced HTSSOP-24 (PWP) package measuring 7.80 mm × 4.40 mm with exposed thermal pad for PCB heat dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 RX | FlexWire input | Asynchronous UART receive line; accepts up to 1-MHz data with built-in CRC validation |
| 2 VLDO | 5-V LDO output | Regulated 5-V supply for external CAN/LIN transceivers; supports 80-mA load with soft-start |
| 3 GND | Ground reference | Primary return path for all analog/digital circuits and thermal pad connection |
| 4 TX | FlexWire output | Open-drain UART transmit line; drives external pull-up to 5 V with 0.3-V low-level output |
| 5 ERR | Open-drain fault indicator | Asserts low on any diagnostic event (open/short/overtemp); supports wired-OR fault bus |
| 6,7 SUPPLY | Main power input | Dual pins reduce IR drop and improve thermal performance for 4.5–40 V automotive supply |
| 8 FS | Fail-safe mode select | Hardware-selectable between two preprogrammed fail-safe states (0 = state 0, 1 = state 1) |
| 9 ADDR2/CLK | Address bit 2 or PWM clock | In external addressing: device ID bit; in internal mode: clock input for PWM0–11 synchronization |
| 10 ADDR1/PWM1 | Address bit 1 or PWM input | External address bit or PWM signal source for OUT6–OUT11 in internal PWM mode |
| 11 ADDR0/PWM0 | Address bit 0 or PWM input | External address bit or PWM signal source for OUT0–OUT5 in internal PWM mode |
| 12 REF | Current reference input | Analog pin setting full-scale current via resistor (1–50 kΩ); also used for EEPROM programming |
| 13–24 OUT0–OUT11 | High-side current outputs | 12 independent constant-current sinks; each supports 0.5–75 mA with <500 mV dropout at 50 mA |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient operation - meets automotive exterior lighting thermal requirements |
| FlexWire interface with CRC & watchdog | UART-based protocol with frame-level error correction and automatic fail-safe entry on lost communication |
| Programmable fail-safe states via EEPROM | Two user-defined output configurations stored in nonvolatile memory - enables safe operation without MCU |
| Single-LED short-circuit diagnosis | ADC-based voltage sampling on each output - isolates fault to individual LED string, not entire channel |
| Integrated 5-V/80-mA LDO | Eliminates need for external 5-V regulator when powering CAN transceivers like TCAN1042 |
| 12-bit independent PWM + 6-bit current scaling | Enables >4096 brightness steps per channel plus fine-grained current trimming for binning compensation |
Applications
| Automotive Exterior Rear Light | Automotive Exterior Headlight |
|---|---|
Use Scenario: Dynamic sequential turn signals and brake light animations requiring independent per-LED control. IC Role / Device Role / Timing Role: 12-channel high-side current driver with synchronized 12-bit PWM dimming and fail-safe state retention. Use Value: Enables pixel-level lighting effects while maintaining ASIL-B compliance through open/short diagnostics and EEPROM-configurable fail-safe behavior. |
Use Scenario: Adaptive driving beam (ADB) modules with segmented LED arrays for glare-free high-beam control. IC Role / Device Role / Timing Role: Precision current source for 12 individually dimmed LED segments, interfaced via FlexWire for EMI-robust off-PCB communication. Use Value: Delivers ±5% current matching across channels and <500 mV dropout at 50 mA - critical for uniform photometric output in safety-critical headlight zones. |
| Automotive Interior Ambient Light | Automotive Cluster Display |
Use Scenario: Soft, tunable cabin lighting with smooth dimming transitions and color mixing via RGB LED strings. IC Role / Device Role / Timing Role: High-accuracy analog current controller supporting linear/exponential dimming curves and 20-kHz PWM to prevent flicker. Use Value: Achieves flicker-free illumination with 12-bit resolution and <±10% error down to 1 mA - essential for low-light human-centric lighting. |
Use Scenario: Backlighting for TFT instrument clusters with localized dimming zones and dynamic contrast enhancement. IC Role / Device Role / Timing Role: 12-channel driver managing discrete backlight segments; communicates via FlexWire to reduce wiring harness complexity. Use Value: Integrates 5-V LDO to power local CAN transceivers and supports daisy-chained topology - reduces BOM count and board space in space-constrained cluster designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-side LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS92692QPWPRQ1 | 10-channel, 60-V max, no integrated LDO, SPI interface instead of FlexWire | Lacks FlexWire bus scalability and 5-V LDO; requires external level-shifting for 3.3-V MCUs | Choose when higher voltage margin (60 V) is needed and CAN transceiver power is supplied separately |
| MAX20051ATG/V+T | 8-channel, 45-V max, I²C interface, no EEPROM, no single-LED short diagnosis | Lower channel count, no fail-safe state storage, limited diagnostic granularity | Choose for cost-sensitive interior lighting where EEPROM-less configuration and reduced diagnostics suffice |
Compared with TPS929120QPWPRQ1, TPS929120QPWPRQ1 offers unique FlexWire scalability and EEPROM-based fail-safe persistence, while TPS92692QPWPRQ1 trades interface robustness for higher voltage rating and MAX20051ATG/V+T sacrifices diagnostics and configurability for integration density and I²C compatibility.
Availability
TPS929120QPWPRQ1 is available at Aetrix Electronics and suitable for automotive exterior lighting, instrument cluster backlighting, and interior ambient lighting requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TPS929120QPWPRQ1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and automotive ICs, with decades of AEC-Q100 qualification expertise and functional safety documentation support.
The TPS929120QPWPRQ1 belongs to TI's automotive LED driver product line, engineered specifically for pixel-controlled exterior lighting systems demanding robust off-board communication, fail-safe operation, and high-accuracy current regulation under harsh automotive conditions.
FAQ
What is the maximum number of TPS929120QPWPRQ1 devices supported on a single FlexWire bus?
The TPS929120QPWPRQ1 supports up to 16 devices on one FlexWire bus using hardware address pins (ADDR0–ADDR2) or software-configurable addresses. Each device responds to its unique 4-bit address, enabling scalable daisy-chained topologies without additional arbitration logic - a key advantage for multi-module lighting systems where TPS929120QPWPRQ1 serves as the core driver node.
Does TPS929120QPWPRQ1 support both analog and PWM dimming simultaneously on the same channel?
No - TPS929120QPWPRQ1 uses a combined dimming architecture: the 6-bit current setting (IOUT[5:0]) establishes the full-scale analog current, and the 12-bit PWM duty cycle (PWMOUT[11:0]) modulates that current. Both parameters are independently programmable per channel, but the final output is always PWM-modulated analog current - not simultaneous independent analog + PWM control.
How does the fail-safe state mechanism work in TPS929120QPWPRQ1?
The TPS929120QPWPRQ1 features a hardware watchdog that triggers automatic entry into one of two EEPROM-programmable fail-safe states if FlexWire communication is lost for >100 ms. Each state defines independent ON/OFF status for all 12 outputs, plus behavior for ERR pin and LDO. This allows TPS929120QPWPRQ1 to maintain defined lighting functionality (e.g., "all-off" or "brake-on") even during MCU failure - critical for ASIL-B compliance.
Can TPS929120QPWPRQ1 drive LEDs directly from a 40-V automotive supply without external components?
Yes - TPS929120QPWPRQ1 operates natively from 4.5 V to 40 V on the SUPPLY pin, with 12 high-side current sources rated for 40-V output compliance. No external boost or buck regulators are required. However, a minimum 1-µF ceramic capacitor is mandatory on VLDO, and a precision resistor on REF is needed to set full-scale current - both are essential for stable TPS929120QPWPRQ1 operation.
What diagnostic capabilities does TPS929120QPWPRQ1 provide beyond basic open/short detection?
TPS929120QPWPRQ1 provides three-tier LED diagnostics: (1) LED open-circuit (via voltage threshold on OUTx), (2) short-to-ground (via voltage sampling), and (3) single-LED short-circuit (using internal 8-bit ADC to measure pin voltage and identify which specific LED in a string has failed). It also includes supply UVLO, overtemperature (160°C shutdown), and FlexWire CRC/watchdog faults - all reported via open-drain ERR pin.
TPS929120QPWPRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 24-PowerTSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- DC DC Regulator
- Topology:
- Step-Down (Buck), Step-Up (Boost)
- Internal Switch(s):
- Yes
- Number of Outputs:
- 12
- Voltage - Supply (Min):
- 4.5V
- Voltage - Supply (Max):
- 40V
- Voltage - Output:
- 4.75V ~ 5.25V
- Current - Output / Channel:
- -
- Frequency:
- 10kHz ~ 2MHz
- Dimming:
- PWM
- Applications:
- -
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-HTSSOP
TPS929120QPWPRQ1 FAQ
1.How can I place an order for TPS929120QPWPRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS929120QPWPRQ1 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for TPS929120QPWPRQ1 reliable?
The price and inventory of TPS929120QPWPRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS929120QPWPRQ1 is usually 5 days.
3.What payment methods are accepted for TPS929120QPWPRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS929120QPWPRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS929120QPWPRQ1?
TPS929120QPWPRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS929120QPWPRQ1 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for TPS929120QPWPRQ1?
For technical support, including TPS929120QPWPRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS929120QPWPRQ1 requirements.
6.How does Aetrix verify that TPS929120QPWPRQ1 is sourced from the original manufacturer or authorized distributors?
All TPS929120QPWPRQ1 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TPS929120QPWPRQ1 meets industry standards.
7.What is the process for return or replacement of TPS929120QPWPRQ1?
All TPS929120QPWPRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS929120QPWPRQ1, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The TPS929120QPWPRQ1 part is unused and in its original packaging.
Return procedure for TPS929120QPWPRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPS929120QPWPRQ1 Tags
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