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Texas Instruments TPS929240QDCPRQ1
- Part No.:
- TPS929240QDCPRQ1
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 38-PowerTFSOP (0.173", 4.40mm Width)
- Datasheet:
-
TPS929240QDCPRQ1.pdf
- Description:
- AUTOMOTIVE 24-CHANNEL 40-V HIGH-
- Quantity:
- Payment:
- Shipping:
Inventory:930
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Product details
Overview
TPS929240QDCPRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive 24-channel high-side LED driver with FlexWire™ interface, supporting 4.5V–40V device supply and 4V–36V LED supply, ±5% current accuracy at 5–100mA per channel, and 12-bit independent PWM dimming up to 20kHz for pixel-level exterior lighting control.
For engineers reviewing the TPS929240QDCPRQ1 datasheet, TPS929240QDCPRQ1 pinout, TPS929240QDCPRQ1 application, or TPS929240QDCPRQ1 equivalent, key selection criteria include fail-safe state programmability via EEPROM, integrated 5V/80mA LDO for CAN transceivers, phase-shift PWM for EMC reduction, and diagnostic coverage for LED open/short and single-LED short circuits.
Technical Context
The TPS929240QDCPRQ1 implements a UART-based FlexWire™ interface with CRC and watchdog, enabling robust multi-drop communication (up to 16 devices) at up to 1MHz without external crystals. Its 24 high-side current sinks feature independent 6-bit current setting (±5% accuracy) and 12-bit PWM with phase-shift capability to reduce EMI in off-board automotive lighting interconnects.
Diagnostics include real-time 8-bit ADC for voltage monitoring, programmable SUPPLY undervoltage detection (2.73–3.02V rising threshold), LED open-circuit detection (200–600mV dropout threshold), and single-LED short-circuit sensing with 2.35–2.65V rising threshold - all supported by fail-safe state machine activation on MCU loss.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels | 24 independent high-side constant-current outputs for individual LED string control |
| Supply Range | VBAT: 4.5V–40V; SUPPLY: 4V–36V - supports direct automotive battery connection and wide LED forward voltage stacks |
| Current Accuracy | ±5% at 5–100mA - enables precise brightness matching across pixels in rear/headlight modules |
| PWM Resolution | 12-bit independent dimming with programmable frequency up to 20kHz - eliminates visible flicker and supports smooth animation |
| FlexWire Speed | Up to 1MHz clock - enables fast configuration of all 24 channels within sub-millisecond frame times |
| LDO Output | 5V ±2.5%, 80mA - powers external CAN transceivers (e.g., TCAN1042-Q1) without secondary regulator |
| Diagnostic Coverage | LED open, short-to-ground, single-LED short, SUPPLY UVLO, overtemperature (160°C trip), and ERR pin fault signaling |
| Fail-Safe Mode | User-programmable EEPROM-based state - maintains defined output behavior (on/off per channel) during MCU communication loss |
Pinout & Package
TPS929240QDCPRQ1 uses the HTSSOP-38 (DCP) package with PowerPAD™ thermal pad (9.70mm × 4.40mm body size), optimized for automotive PCB layouts requiring high power dissipation and compact footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RX / TX | FlexWire™ serial interface I/O | UART-based differential-capable bus interface; supports CRC, watchdog, and synchronization frames for EMC-robust off-board communication |
| VBAT | Main bias supply input | Powers analog/digital core (4.5–40V); triggers POR/UVLO at 4.2V rising threshold |
| SUPPLY (×2) | High-side current channel supply | Drives 24 LED strings (4–36V range); dual pins reduce IR drop and improve thermal distribution |
| OUTA0–OUTH2 (×24) | High-side current output terminals | 24 individually controllable constant-current sinks; 750mV dropout at 100mA enables low-Vf LED operation |
| VLDO | Integrated 5V LDO output | Supplies external CAN transceivers; regulated 5V ±2.5% at up to 80mA with 0.9V max dropout |
| ERR | Open-drain fault indicator | Active-low signal asserting on any diagnostic fault (open/short/UVLO/overtemp); pulled down during POR/INIT |
| FS0 / FS1 | Fail-safe mode select inputs | Hardware-configurable inputs that override EEPROM settings to force predefined safe states |
| ADDR0–ADDR2 | 3-bit device address inputs | Set unique FlexWire™ address (0–7) for multi-device daisy-chain; internal 240kΩ pull-downs |
| REF | Current reference setting | Analog input accepting 1–50kΩ resistor to set global current scaling factor (KREF = 64/128/256/512) |
| GND | Power and signal ground | Common return for VBAT, SUPPLY, and digital logic; connected to exposed PowerPAD™ for thermal conduction |
Key Features
| Feature | Design Value |
|---|---|
| FlexWire™ Interface | UART-based, crystal-free, multi-drop (16-device) bus with CRC, watchdog, and sync-frame timing - eliminates external oscillator and reduces BOM cost |
| Phase-Shift PWM | Programmable channel-to-channel PWM delay - reduces peak current harmonics and improves system-level EMC in multi-string lighting |
| EEPROM-Based Fail-Safe | 8kB user-programmable EEPROM stores fail-safe configurations (per-channel ON/OFF, diagnostics enable/disable) - ensures functional safety without MCU presence |
| Integrated 5V LDO | 80mA 5V regulator with 0.9V dropout at full load - directly powers CAN/LIN transceivers (e.g., TCAN1042-Q1), eliminating discrete LDO |
| Single-LED Short Detection | Dedicated 2.5V threshold comparator per channel - distinguishes single-LED failure from full-string short, enabling granular fault isolation in matrix lighting |
| 8-Bit ADC Monitoring | On-chip ADC measures VLDO, VBAT, SUPPLY, and channel voltages - enables real-time health monitoring and adaptive dimming compensation |
Applications
| Automotive Exterior Rear Light | Automotive Exterior Headlight |
|---|---|
Use Scenario: Dynamic sequential turn signals and brake light animations using individually addressable LED segments. IC Role / Device Role / Timing Role: 24-channel high-side driver providing independent current and PWM control per LED string; FlexWire™ enables synchronized multi-module updates across trunk and tail lamp PCBs. Use Value: ±5% current accuracy ensures uniform luminance across 24 segments; phase-shift PWM reduces conducted EMI below CISPR 25 Class 5 limits. | Use Scenario: Adaptive driving beam (ADB) systems requiring pixel-level LED on/off control for glare-free high-beam projection. IC Role / Device Role / Timing Role: High-voltage (36V) high-side sink enabling long LED strings; 12-bit PWM resolution supports fine-grained intensity control for beam shaping algorithms. Use Value: 750mV dropout at 100mA allows use with low-Vf micro-LEDs; fail-safe EEPROM config maintains safe default beam pattern during MCU reset. |
| Automotive Interior Ambient Light | Automotive Cluster Display |
Use Scenario: Soft, uniform cabin lighting with color-tuning via RGBW LED arrays controlled by centralized lighting controller. IC Role / Device Role / Timing Role: Constant-current source for multiple low-current (5–20mA) ambient strings; VLDO powers local CAN transceiver for distributed control network. Use Value: 2-bit global + 6-bit independent current control enables precise white-point tuning; 8-bit ADC monitors SUPPLY rail for adaptive brightness compensation. | Use Scenario: TFT backlight dimming with localized contrast enhancement using segmented LED zones behind display. IC Role / Device Role / Timing Role: High-accuracy current driver for 24-zone backlight; FlexWire™ allows daisy-chained configuration across instrument cluster and center stack PCBs. Use Value: ±5% channel-to-channel accuracy prevents visible banding; programmable PWM frequency avoids audible noise in 200Hz–20kHz range. |
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 |
|---|---|---|---|
| TPS929230QDCPRQ1 | 24-channel, identical FlexWire™ interface and fail-safe architecture, but limited to 30V SUPPLY max and no integrated VLDO | Suitable for lower-voltage interior lighting only; cannot power external CAN transceivers | Select when 30V LED supply suffices and external 5V rail is available |
| MAX20051ATG/V+T | 12-channel high-side driver with SPI interface, 40V rating, and integrated 5V LDO - lacks phase-shift PWM and single-LED short diagnostics | Targeted at simpler static lighting; requires separate MCU SPI resource and offers half the channel count | Select for cost-sensitive 12-channel designs where FlexWire™ scalability is unnecessary |
Compared with TPS929230QDCPRQ1 and MAX20051ATG/V+T, the TPS929240QDCPRQ1 uniquely combines 24-channel count, 36V LED supply headroom, integrated 5V LDO, phase-shift PWM, and single-LED short detection - making it the only option qualified for AEC-Q100 Grade 1 pixelated exterior lighting with functional safety requirements.
Availability
TPS929240QDCPRQ1 is available at Aetrix Electronics and suitable for automotive exterior rear light, automotive exterior headlight, and automotive cluster display applications requiring stable component supply, AEC-Q100 compliance, and long-term production continuity.
Supply support for TPS929240QDCPRQ1 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 automotive qualification expertise and ISO/TS 16949-certified manufacturing.
The TPS929240QDCPRQ1 belongs to TI's FlexWire™-enabled automotive LED driver product line, designed specifically for pixel-controlled exterior lighting systems requiring robust off-board communication, fail-safe operation, and high channel density in space-constrained modules.
FAQ
What is the maximum number of TPS929240QDCPRQ1 devices supported on a single FlexWire™ bus?
The TPS929240QDCPRQ1 supports up to 16 devices on one FlexWire™ bus using 3-bit hardware address inputs (ADDR0–ADDR2). Each device must have a unique 3-bit address (0–7), and multiple devices can share the same address only if isolated by external logic - however, standard operation assumes distinct addresses for independent register access and diagnostics reporting.
Does the TPS929240QDCPRQ1 require an external crystal oscillator for FlexWire™ operation?
No, the TPS929240QDCPRQ1 does not require an external crystal oscillator. Its FlexWire™ interface uses an internal 32.15MHz oscillator with ±2.5% tolerance and a synchronization frame mechanism to maintain timing integrity across devices - eliminating BOM cost and board space for external crystals while meeting automotive EMC requirements.
How does the fail-safe functionality of the TPS929240QDCPRQ1 operate during MCU communication loss?
Upon loss of FlexWire™ communication, the TPS929240QDCPRQ1's fail-safe state machine activates and loads pre-programmed EEPROM settings to configure each of the 24 outputs as ON, OFF, or PWM-defined - independent of MCU presence. This behavior is configurable per channel and includes options like "one-fails-all-fail" or "one-fails-others-on", ensuring ASIL-B compliant lighting behavior during system faults.
What is the purpose of the VLDO pin on the TPS929240QDCPRQ1, and what load can it drive?
The VLDO pin on the TPS929240QDCPRQ1 provides a regulated 5V ±2.5% output capable of delivering up to 80mA continuous current, designed specifically to power external CAN transceivers such as the TCAN1042-Q1. It features internal current limiting (110mA) and soft-start, and requires a 1–10µF ceramic capacitor for stability - eliminating the need for a discrete 5V regulator in automotive lighting modules.
Can the TPS929240QDCPRQ1 detect a short circuit in just one LED within a multi-LED string?
Yes, the TPS929240QDCPRQ1 provides dedicated single-LED short-circuit detection per channel with a 2.5V rising threshold (2.35–2.65V), enabling identification of partial-string shorts - for example, detecting failure of one LED in a 3-LED series string while keeping remaining LEDs operational. This capability supports advanced diagnostics in matrix lighting architectures where granular fault isolation is required.
TPS929240QDCPRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 38-PowerTFSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Linear
- Topology:
- Constant Current
- Internal Switch(s):
- No
- Number of Outputs:
- 24
- Voltage - Supply (Min):
- 4.5V
- Voltage - Supply (Max):
- 40V
- Voltage - Output:
- 4V ~ 36V
- Current - Output / Channel:
- 100mA
- Frequency:
- 32.15MHz
- Dimming:
- Analog, PWM
- Applications:
- -
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 38-HTSSOP
TPS929240QDCPRQ1 FAQ
1.How can I place an order for TPS929240QDCPRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS929240QDCPRQ1 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 TPS929240QDCPRQ1 reliable?
The price and inventory of TPS929240QDCPRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS929240QDCPRQ1 is usually 5 days.
3.What payment methods are accepted for TPS929240QDCPRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS929240QDCPRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS929240QDCPRQ1?
TPS929240QDCPRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS929240QDCPRQ1 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 TPS929240QDCPRQ1?
For technical support, including TPS929240QDCPRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS929240QDCPRQ1 requirements.
6.How does Aetrix verify that TPS929240QDCPRQ1 is sourced from the original manufacturer or authorized distributors?
All TPS929240QDCPRQ1 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 TPS929240QDCPRQ1 meets industry standards.
7.What is the process for return or replacement of TPS929240QDCPRQ1?
All TPS929240QDCPRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS929240QDCPRQ1, 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 TPS929240QDCPRQ1 part is unused and in its original packaging.
Return procedure for TPS929240QDCPRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPS929240QDCPRQ1 Tags
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