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Texas Instruments TPS929120AQPWPRQ1
- Part No.:
- TPS929120AQPWPRQ1
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 24-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TPS929120AQPWPRQ1.pdf
- Description:
- IC LED DRIVER RGLTR PWM 24HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,959
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Product details
Overview
TPS929120AQPWPRQ1 from Texas Instruments is an AEC-Q100 Grade 1 (–40°C to +125°C) automotive 12-channel high-side LED driver with FlexWire interface, 4.5 V–40 V supply range, ±5% current accuracy at 5–75 mA per channel, and 12-bit independent PWM dimming up to 20 kHz - deployed in pixel-controlled rear/headlight modules requiring robust off-board communication.
For engineers reviewing the TPS929120AQPWPRQ1 datasheet, TPS929120AQPWPRQ1 pinout, TPS929120AQPWPRQ1 application, or TPS929120AQPWPRQ1 equivalent, key selection criteria include FlexWire bus scalability (up to 16 devices), fail-safe state programmability via EEPROM, integrated 5-V/80-mA LDO for CAN transceivers, and dual-level diagnostics (LED open/short + single-LED short detection).
Technical Context
The TPS929120AQPWPRQ1 implements a UART-based FlexWire interface using a synchronization frame to eliminate external crystals, supports up to 1-MHz clock frequency, and embeds CRC and watchdog for fault-tolerant communication in automotive EMC-critical environments. Its digital core manages 12 independent high-side current sources with 2-bit global + 6-bit per-channel current control and linear/exponential dimming modes.
Each output channel integrates analog current regulation with <500 mV dropout at 50 mA, while on-chip 8-bit ADC enables real-time voltage monitoring of external pins. Fail-safe operation is enforced by configurable state machine logic that activates pre-programmed EEPROM settings upon MCU disconnect or communication timeout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 4.5 V to 40 V - directly interfaces automotive battery rail without external DC/DC pre-regulation |
| Channel Count | 12 independent high-side constant-current outputs - enables per-pixel control in segmented lighting arrays |
| Max Output Current | 75 mA per channel - set by external REF resistor and CONF_REFRANGE register configuration |
| Current Accuracy | ±5% at 5–75 mA - ensures uniform brightness across LED strings under thermal and supply variation |
| PWM Resolution | 12-bit independent dimming - supports >4000-step grayscale control per channel for smooth animation |
| FlexWire Speed | Up to 1 MHz - enables sub-100 µs frame transmission for real-time dynamic lighting updates |
| LDO Output | 5 V / 80 mA - powers external CAN transceivers (e.g., TCAN1042) without auxiliary regulator |
| Diagnostic Coverage | LED open-circuit, short-to-ground, and single-LED short detection - reduces need for external sensing circuitry |
Pinout & Package
TPS929120AQPWPRQ1 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 receive input | Asynchronous UART data input; accepts 0–5 V logic levels with internal 100-kΩ pull-down |
| 2 VLDO | 5-V LDO output | Regulated 5-V supply for external CAN/LIN transceivers; supports up to 80 mA load |
| 3 GND | Device ground reference | Common return path for analog/digital circuits and thermal pad connection |
| 4 TX | FlexWire transmit output | Open-drain UART output with 5-V tolerant capability; requires external pull-up |
| 5 ERR | Open-drain error indicator | Asserts low on fault (open/short/overtemp); supports wired-OR fault bus with other devices |
| 6,7 SUPPLY | Main power input | Dual-pin connection for low-impedance 4.5–40 V supply routing and thermal conduction |
| 8 FS | Fail-safe state select | Hardware-selectable between two pre-programmed EEPROM fail-safe configurations |
| 9 ADDR2/CLK | Address bit 2 or PWM clock | Configurable as device address input (external mode) or internal PWM clock source |
| 10 ADDR1/PWM1 | Address bit 1 or PWM input | Supports internal PWM injection for OUT6–OUT11 when external addressing disabled |
| 11 ADDR0/PWM0 | Address bit 0 or PWM input | Supports internal PWM injection for OUT0–OUT5 when external addressing disabled |
| 12 REF | Reference current setting | Analog input sets full-scale current via external resistor; also used for EEPROM programming |
| 13–24 OUT0–OUT11 | High-side LED current outputs | 12 individually controlled constant-current sinks; each drives cathode of LED string |
Key Features
| Feature | Design Value |
|---|---|
| FlexWire interface | UART-based, crystal-free, CRC-protected bus supporting up to 16 daisy-chained devices with 1-MHz max speed |
| Fail-safe state machine | Automatically enters user-configured EEPROM-defined state on MCU loss, watchdog timeout, or communication failure |
| Integrated 5-V LDO | 80-mA capable regulator with 0.6-V dropout at 50 mA - eliminates need for discrete CAN transceiver supply |
| Multi-level diagnostics | Detects LED open, short-to-ground, and single-LED short conditions with deglitch timers and hysteresis |
| 12-bit independent PWM | Programmable frequency (200 Hz–20 kHz) and dimming method (linear/exponential) per channel |
| EEPROM programmability | Stores fail-safe states, current settings, and configuration registers; supports end-of-line customization |
Applications
| Automotive Exterior Rear Light | Automotive Exterior Headlight |
|---|---|
Use Scenario: Dynamic sequential turn signals and brake light animations using segmented LED arrays. IC Role / Device Role / Timing Role: High-side current controller for 12 independent LED segments with synchronized PWM dimming. Use Value: Enables precise per-segment brightness control and real-time animation updates via FlexWire without EMI-sensitive parallel wiring. |
Use Scenario: Adaptive driving beam (ADB) systems requiring individual LED pixel enable/disable and intensity modulation. IC Role / Device Role / Timing Role: Constant-current driver for ADB matrix elements with fail-safe illumination fallback on communication loss. Use Value: Meets ASIL-B functional safety requirements through configurable fail-safe states and diagnostic coverage. |
| Automotive Interior Ambient Light | Automotive Cluster Display |
Use Scenario: RGB ambient lighting zones with smooth color transitions and adaptive dimming based on cabin conditions. IC Role / Device Role / Timing Role: Multi-channel current source enabling independent control of red/green/blue LED strings. Use Value: Delivers ±5% current matching across channels for consistent white-point stability and flicker-free dimming. |
Use Scenario: Backlighting for TFT instrument clusters with localized dimming zones and high-contrast display rendering. IC Role / Device Role / Timing Role: High-voltage (40 V) high-side driver for LED strings behind segmented LCD layers. Use Value: Supports 40-V headroom for long LED strings and maintains <500 mV dropout at 50 mA for thermal efficiency. |
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 |
|---|---|---|---|
| TPS929120QPWPRQ1 | Same silicon; lacks 'A' suffix indicating production revision with updated EEPROM defaults and register reset values | No functional difference in lighting control; identical pinout, specs, and FlexWire protocol | Select TPS929120AQPWPRQ1 for latest factory-programmed EEPROM defaults and documented register behavior per SLVSE03B Rev B |
| TPS92633QPWPRQ1 | 3-channel, 40-V high-side driver with SPI interface; no FlexWire, no integrated LDO, no single-LED short detection | Suitable for simpler lighting functions where bus scalability and advanced diagnostics are not required | Choose only if system uses SPI master and does not require CAN transceiver power or per-LED fault isolation |
Compared with TPS929120QPWPRQ1, the TPS929120AQPWPRQ1 offers verified EEPROM default values and corrected register behaviors per Rev B datasheet; versus TPS92633QPWPRQ1, it delivers 4× channel count, FlexWire bus architecture, and comprehensive diagnostics essential for pixel-level automotive lighting.
Availability
TPS929120AQPWPRQ1 is available at Aetrix Electronics and suitable for automotive exterior lighting, interior ambient systems, and digital cluster displays requiring stable component supply, AEC-Q100 compliance, and long-term lifecycle support.
Supply support for TPS929120AQPWPRQ1 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 company specializing in analog and embedded processing technologies, with leadership in automotive-grade power management and interface solutions.
The TPS929120AQPWPRQ1 belongs to TI's automotive LED driver product line, designed specifically for pixel-controlled exterior and interior lighting systems demanding functional safety, EMC-robust communication, and fail-safe operation.
FAQ
What is the FlexWire interface used in the TPS929120AQPWPRQ1?
The FlexWire interface in the TPS929120AQPWPRQ1 is a UART-based, crystal-free, addressable serial bus supporting up to 16 devices on one bus at speeds up to 1 MHz. It includes built-in CRC, watchdog, and synchronization framing to ensure robust communication in automotive environments. Unlike standard UART, FlexWire eliminates the need for external timing components and supports daisy-chained topologies without signal integrity degradation - critical for off-board LED module interconnects.
How does the TPS929120AQPWPRQ1 handle fail-safe operation during MCU communication loss?
The TPS929120AQPWPRQ1 uses a configurable fail-safe state machine that activates pre-programmed EEPROM settings when communication is lost, watchdog expires, or supply faults occur. Two hardware-selectable states (via FS pin) allow independent ON/OFF configuration per channel. This ensures deterministic lighting behavior - such as maintaining brake light illumination or entering safe dimming mode - without MCU intervention, meeting ASIL-B functional safety requirements.
Can the TPS929120AQPWPRQ1 drive LEDs directly from a 24-V truck battery system?
Yes, the TPS929120AQPWPRQ1 supports 4.5 V to 40 V supply voltage, making it compatible with 12-V and 24-V automotive battery systems including commercial vehicle jump-start and load-dump transients. Its 40-V absolute maximum rating and integrated overvoltage protection allow direct connection to truck battery rails without external clamping or pre-regulation - validated per ISO 7637-2 and ISO 16750-2 test standards.
What diagnostic capabilities does the TPS929120AQPWPRQ1 provide for LED string health monitoring?
The TPS929120AQPWPRQ1 provides three-tier LED diagnostics: (1) LED open-circuit detection using voltage threshold comparison (200–700 mV hysteresis), (2) short-to-ground detection with 0.8–1.3 V thresholds, and (3) single-LED short detection via ADC measurement of OUTx pin voltage. All diagnostics include 5-µs deglitch timers and generate ERR flag assertion - enabling early fault identification before thermal runaway or system-level failure.
Does the TPS929120AQPWPRQ1 include an integrated LDO, and what is its purpose?
Yes, the TPS929120AQPWPRQ1 integrates a 5-V, 80-mA LDO (VLDO pin) optimized to power external CAN transceivers like TCAN1042. It features 0.6-V dropout at 50 mA, 1–10 µF capacitor support, and internal current limiting. This eliminates the need for a separate 5-V regulator in lighting modules, reducing BOM count and PCB area while ensuring stable transceiver operation during battery voltage fluctuations.
TPS929120AQPWPRQ1 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 ~ 1MHz
- Dimming:
- Analog, PWM
- Applications:
- -
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-HTSSOP
TPS929120AQPWPRQ1 FAQ
1.How can I place an order for TPS929120AQPWPRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS929120AQPWPRQ1 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 TPS929120AQPWPRQ1 reliable?
The price and inventory of TPS929120AQPWPRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS929120AQPWPRQ1 is usually 5 days.
3.What payment methods are accepted for TPS929120AQPWPRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS929120AQPWPRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS929120AQPWPRQ1?
TPS929120AQPWPRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS929120AQPWPRQ1 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 TPS929120AQPWPRQ1?
For technical support, including TPS929120AQPWPRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS929120AQPWPRQ1 requirements.
6.How does Aetrix verify that TPS929120AQPWPRQ1 is sourced from the original manufacturer or authorized distributors?
All TPS929120AQPWPRQ1 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 TPS929120AQPWPRQ1 meets industry standards.
7.What is the process for return or replacement of TPS929120AQPWPRQ1?
All TPS929120AQPWPRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS929120AQPWPRQ1, 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 TPS929120AQPWPRQ1 part is unused and in its original packaging.
Return procedure for TPS929120AQPWPRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPS929120AQPWPRQ1 Tags
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BCR402RE6327HTSA1
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LYT1604D-TL
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HV9910CLG-G
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CL2N8-G
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