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Texas Instruments TPS929240AQDCPRQ1
- Part No.:
- TPS929240AQDCPRQ1
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 38-PowerTFSOP (0.173", 4.40mm Width)
- Datasheet:
-
TPS929240AQDCPRQ1.pdf
- Description:
- AUTOMOTIVE 24-CHANNEL 40-V HIGH-
- Quantity:
- Payment:
- Shipping:
Inventory:1,369
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Product details
Overview
TPS929240AQDCPRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive 24-channel high-side LED driver with FlexWire™ interface, supporting 4.5–40V device supply and 4–36V LED supply, ±5% current accuracy at 5–100mA per channel, and 12-bit independent PWM dimming up to 20kHz - deployed in pixel-controlled rear/headlight systems.
For engineers reviewing the TPS929240AQDCPRQ1 datasheet, TPS929240AQDCPRQ1 pinout, TPS929240AQDCPRQ1 application, or TPS929240AQDCPRQ1 equivalent, key selection criteria include fail-safe state programmability, single-LED short-circuit diagnostics, 8-bit ADC for supply monitoring, and FlexWire bus scalability to 16 devices with CRC and watchdog protection.
Technical Context
The TPS929240AQDCPRQ1 implements a UART-based FlexWire™ interface using a synchronization frame to eliminate external crystals, supports CAN/LIN physical layers via optional transceivers, and embeds CRC and watchdog for robust automotive serial communication. Its 24 high-side current sources feature independent 6-bit current scaling and 12-bit PWM with phase-shift capability to reduce EMI.
Diagnostics include LED open-circuit detection (200–700mV threshold), short-to-ground (0.8–1.3V), and per-channel single-LED short detection (2.35–3.05V), all with configurable deglitch timers (8–100µs). Fail-safe operation is managed by EEPROM-programmable state machine enabling stand-alone mode without MCU presence.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels | 24 independent high-side constant-current outputs for individual LED string control |
| Supply Range | VBAT: 4.5–40V; SUPPLY: 4–36V - enables direct connection to automotive battery and flexible LED rail design |
| Current Accuracy | ±5% at 5–100mA - ensures consistent brightness across temperature (–40°C to +125°C) and unit-to-unit variation |
| PWM Resolution | 12-bit independent per channel - supports fine-grained dimming steps (4096 levels) and linear/exponential curves |
| FlexWire Speed | Up to 1MHz clock - allows fast configuration of all 24 channels within sub-millisecond frame times |
| Diagnostic Coverage | LED open, short-to-ground, and single-LED short detection with dedicated thresholds and deglitch timers |
| LDO Output | 5V ±5%, 80mA - powers external CAN transceivers (e.g., TCAN1042-Q1) without secondary regulator |
Pinout & Package
TPS929240AQDCPRQ1 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 EMC resilience.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RX / TX | FlexWire serial interface I/O | Asynchronous UART-based master-slave communication with built-in CRC and synchronization frame |
| VLDO | 5V LDO output | Supplies external CAN transceiver; requires 1–10µF ceramic capacitor for stability |
| ERR | Open-drain fault indicator | Asserts low on any diagnostic fault (open/short/overtemp); pulled down during POR/INIT |
| FS0 / FS1 | Fail-safe input selection | Hardware-selectable fail-safe mode (e.g., one-fails-all-fail or one-fails-others-on) |
| ADDR0–ADDR2 | 3-bit device address | Enables up to 8 unique addresses on same FlexWire bus; internal 240kΩ pull-down resistors |
| OUTA0–OUTH2 | 24 high-side current outputs | Each drives LED strings with programmable current (via REF resistor) and PWM duty cycle |
| REF | Current reference input | Resistor-set global current scale (64–512× gain); supports 1–100mA range with 8.45kΩ default |
| SUPPLY (×2) | LED string supply input | Dual pins reduce IR drop and improve thermal distribution for high-current operation |
| VBAT | Main device bias supply | Powers analog/digital core; includes UVLO (4.2V rising) and POR circuitry |
Key Features
| Feature | Design Value |
|---|---|
| FlexWire™ Interface | UART-based, crystal-free, CRC-protected, watchdog-monitored bus supporting up to 16 devices and 24-byte frames |
| Fail-Safe State Machine | EEPROM-programmable behavior during MCU loss - supports stand-alone operation with preconfigured outputs |
| Single-LED Short Detection | Per-channel voltage threshold (2.5V typical) distinguishes single-LED failure from full-string short |
| On-Chip 8-Bit ADC | Measures V(SUPPLY) or channel voltages for real-time load monitoring and diagnostics without external components |
| Phase-Shift PWM | Configurable timing offset between channels reduces peak current and improves system-level EMC performance |
| Thermal Protection | Two-stage overtemperature response: pre-warning at 135°C, shutdown at 175°C with 15°C hysteresis |
Applications
| Automotive Exterior Rear Light | Automotive Exterior Headlight |
|---|---|
|
Use Scenario: Sequential turn signals, dynamic brake lights, and adaptive light signatures using individually addressable LED segments. IC Role / Device Role / Timing Role: High-side current driver with per-channel PWM dimming and phase-shift control to minimize EMI in long-harness wiring. Use Value: Enables animation fidelity with <±5% current matching across 24 channels and fail-safe fallback to static patterns during MCU interruption. |
Use Scenario: Matrix beam headlight systems requiring precise pixel-level control of LED arrays for glare-free high-beam modulation. IC Role / Device Role / Timing Role: Constant-current source with 12-bit PWM resolution and independent channel enable/disable for real-time beam shaping. Use Value: Supports >200Hz flicker-free dimming and diagnostic coverage for open/short faults - critical for ASIL-B functional safety compliance. |
| Automotive Interior Ambient Light | Automotive Cluster Display |
|
Use Scenario: Soft ambient lighting zones with smooth color transitions and localized brightness tuning across door panels, footwells, and consoles. IC Role / Device Role / Timing Role: Flexible current output driver with linear/exponential dimming curves and integrated 5V LDO for local sensor/transceiver power. Use Value: Eliminates need for external regulators and enables synchronized multi-zone dimming via single FlexWire bus. |
Use Scenario: Backlighting for TFT instrument clusters with variable intensity zones (e.g., speedometer vs. warning icons). IC Role / Device Role / Timing Role: High-accuracy current sink driving parallel LED strings with independent PWM control per segment. Use Value: Delivers uniform luminance across temperature (–40°C to +125°C) and maintains <750mV dropout at 100mA for efficient thermal design. |
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 |
|---|---|---|---|
| TPS929230AQDCPRQ1 | 24-channel, identical FlexWire interface and diagnostics, but limited to 30V max SUPPLY (vs. 36V) and no VLDO output | Suitable for lower-voltage LED rails (<30V); cannot power external CAN transceivers | Select when system supply is ≤30V and external 5V rail is available |
| TPS92692QPWPRQ1 | 16-channel, analog+PWM dimming, no FlexWire - uses SPI interface; includes boost controller and 6-bit current DAC | Targets simpler, cost-sensitive designs without multi-device daisy-chaining or CAN integration needs | Choose for SPI-based systems requiring integrated boost regulation and lower channel count |
Compared with TPS929230AQDCPRQ1 and TPS92692QPWPRQ1, the TPS929240AQDCPRQ1 uniquely combines 36V LED supply support, integrated 5V LDO, and FlexWire scalability - making it optimal for complex, multi-node automotive lighting architectures requiring EMC-robust off-board communication.
Availability
TPS929240AQDCPRQ1 is available at Aetrix Electronics and suitable for automotive exterior lighting, interior ambient systems, and digital cluster displays requiring stable component supply across extended temperature and long product lifecycles.
Supply support for TPS929240AQDCPRQ1 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-grade ICs with decades of AEC-Q100 qualification expertise.
The TPS929240AQDCPRQ1 belongs to TI's FlexWire™ automotive LED driver family, designed specifically for pixel-level, animation-capable lighting systems requiring robust diagnostics, fail-safe autonomy, and scalable serial control.
FAQ
What is the maximum number of TPS929240AQDCPRQ1 devices supported on a single FlexWire bus?
The TPS929240AQDCPRQ1 supports up to 16 devices on one FlexWire bus using 3-bit hardware address lines (ADDR0–ADDR2) and automatic frame arbitration. Each device responds only to its assigned address, enabling daisy-chained or star-topology configurations without bus contention or external address decoding logic.
Does the TPS929240AQDCPRQ1 require an external crystal oscillator for FlexWire operation?
No, the TPS929240AQDCPRQ1 does not require an external crystal oscillator. Its FlexWire interface uses an internal 32.15MHz oscillator with synchronization frames to maintain timing accuracy across devices - eliminating BOM cost and board space for external timing components while maintaining robust UART-based communication.
How does the fail-safe functionality of the TPS929240AQDCPRQ1 operate during MCU communication loss?
Upon loss of FlexWire communication, the TPS929240AQDCPRQ1 automatically enters a user-programmed FAIL-SAFE state stored in EEPROM. This includes configurable outputs (on/off per channel), fault response modes (one-fails-all-fail or selective disable), and optional use of FS0/FS1 pins for hardware override - enabling safe illumination states without MCU intervention.
Can the TPS929240AQDCPRQ1 drive LEDs directly from a 40V automotive supply rail?
Yes, the TPS929240AQDCPRQ1 accepts VBAT up to 40V and supports SUPPLY rails up to 36V, allowing direct connection to boosted or unregulated automotive supplies. Its 750mV dropout at 100mA ensures efficient operation even at high currents, and thermal metrics (RθJA = 27.7°C/W) support reliable performance in sealed headlight enclosures.
What diagnostic capabilities does the TPS929240AQDCPRQ1 provide for LED string integrity?
The TPS929240AQDCPRQ1 provides three-tier LED diagnostics: open-circuit detection (200–700mV VSUPPLY–VOUT threshold), short-to-ground (0.8–1.3V), and per-channel single-LED short detection (2.35–3.05V). All include programmable deglitch timers (8–100µs) and generate ERR flag assertion with register-accessible fault flags for precise root-cause identification.
TPS929240AQDCPRQ1 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:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 38-HTSSOP
TPS929240AQDCPRQ1 FAQ
1.How can I place an order for TPS929240AQDCPRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS929240AQDCPRQ1 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 TPS929240AQDCPRQ1 reliable?
The price and inventory of TPS929240AQDCPRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS929240AQDCPRQ1 is usually 5 days.
3.What payment methods are accepted for TPS929240AQDCPRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS929240AQDCPRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS929240AQDCPRQ1?
TPS929240AQDCPRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS929240AQDCPRQ1 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 TPS929240AQDCPRQ1?
For technical support, including TPS929240AQDCPRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS929240AQDCPRQ1 requirements.
6.How does Aetrix verify that TPS929240AQDCPRQ1 is sourced from the original manufacturer or authorized distributors?
All TPS929240AQDCPRQ1 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 TPS929240AQDCPRQ1 meets industry standards.
7.What is the process for return or replacement of TPS929240AQDCPRQ1?
All TPS929240AQDCPRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS929240AQDCPRQ1, 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 TPS929240AQDCPRQ1 part is unused and in its original packaging.
Return procedure for TPS929240AQDCPRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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