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Texas Instruments TPS92661QPHPRQ1
- Part No.:
- TPS92661QPHPRQ1
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 48-PowerTQFP
- Datasheet:
-
TPS92661QPHPRQ1.pdf
- Description:
- IC LED DRV RGLTR PWM 48HTQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,250
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Product details
Overview
TPS92661QPHPRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive LED matrix manager IC for dynamic headlight systems. It integrates twelve 225 mΩ shunt MOSFETs, 10-bit per-channel PWM dimming with programmable turn-on/turn-off timing, and multi-drop UART control. It operates from a 5-V supply, supports up to 67-V floating charge pump rail, and enables pixel-level LED control in 12-LED series strings.
For engineers reviewing the TPS92661QPHPRQ1 datasheet, TPS92661QPHPRQ1 pinout, TPS92661QPHPRQ1 application, or TPS92661QPHPRQ1 equivalent, key selection criteria include shunt-switch RDS(on), LED open/short fault detection thresholds (5–6.9 V / 0.52–1.4 V), synchronization capability across multiple devices, thermal performance in 48-pin TQFP with exposed pad, and compatibility with buck-current-regulated high-brightness LED arrays.
Technical Context
The TPS92661QPHPRQ1 implements a 12-channel shunt-FET architecture where each switch floats up to 67 V above GND using an internal charge pump (6.2 V typical output). Each channel features independent 10-bit PWM control with separately programmable LEDxON/LEDxOFF registers and inherent phase-shift capability via staggered timing values.
It uses a multi-drop UART interface with hardware address pins (ADR0–ADR2) supporting up to eight daisy-chained devices on one bus. Synchronization is achieved either via external SYNC pulse alignment or broadcast UART command, ensuring deterministic TCNT rollover across devices for coherent beam shaping in adaptive driving beam (ADB) systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| LED Switch Count | 12 independent shunt MOSFETs for per-LED bypass in series string |
| RDS(on) per Switch | 225 mΩ - determines conduction loss and thermal load per active channel |
| Charge Pump Voltage | 6.2 V typical - enables gate drive for switches floating up to 67 V above GND |
| PWM Resolution | 10-bit (0–1023) - supports fine-grained dimming control and phase shifting |
| LED Fault Detection | Open threshold: 5–6.9 V; Short threshold: 0.52–1.4 V - enables real-time diagnostics over UART |
| Supply Voltage | 4.5–5.5 V - compatible with standard automotive 5-V MCU rails |
| Ambient Temp Range | –40°C to +125°C - meets AEC-Q100 Grade 1 requirements for under-hood use |
Pinout & Package
TPS92661QPHPRQ1 is housed in a thermally enhanced 48-pin TQFP (PHP) package with 7.00 mm × 7.00 mm body size and exposed thermal pad connected to system GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| LED0–LED12 | Switch source/drain terminals | Form 12-series-connected shunt paths across 12-LED string; LED0 connects to cathode of LED1, LED12 to anode of LED12 |
| VIN | 5-V power input | Supplies internal LDO and logic; requires ≥0.1 µF ceramic bypass capacitor |
| VCC | 3.3-V regulated output | Provides I/O buffer voltage; can be shorted to VIN for 5-V logic compatibility |
| CPP | Charge pump output | Drives gate of all shunt switches; must be bypassed to LED12 with ≥0.1 µF capacitor |
| TX/RX | UART data I/O | Multi-drop daisy-chain interface; TX requires 100 kΩ pull-up; RX routes through adjacent device |
| SYNC | Synchronization signal | Enables deterministic TCNT reset across multiple devices; only one master allowed per network |
| ADR0–ADR2 | Hardware address inputs | Set 3-bit device address (0–7); connect to VIN or GND to configure unique UART ID |
| EN | Enable input | Active-high enable; low state forces device into reset; tied to MCU or VCC for power-up enable |
| CLK | System clock input | External clock (0.1–16 MHz) synchronizes internal PWM counter and UART timing |
| GND / Thermal Pad | Ground reference & thermal path | All 11 GND pins and exposed pad must be connected to system ground for EMI control and thermal dissipation |
Key Features
| Feature | Design Value |
|---|---|
| 12-channel shunt FET array | Enables individual LED on/off control in 12-LED series strings without modifying current regulator topology |
| Programmable 10-bit PWM per channel | Supports precise dimming and phase-shifted transitions to reduce input current ripple in multi-string systems |
| Integrated 67-V charge pump | Eliminates need for external high-voltage gate drivers; allows direct connection to high-side LED string nodes |
| LED open/short fault reporting | Real-time diagnostics via UART with dedicated thresholds (5–6.9 V open, 0.52–1.4 V short) and <5 µs reporting delay |
| Multi-drop UART with hardware addressing | Supports up to eight TPS92661QPHPRQ1 devices on single bus using ADR0–ADR2 pins - reduces MCU GPIO count and wiring complexity |
| Feed-through TQFP layout | Optimized pin arrangement enables single-layer metal-core PCB routing on LED load boards - minimizes parasitic inductance near high-di/dt switching nodes |
Applications
| Adaptive Driving Beam (ADB) Headlights | Matrix LED Rear Lighting |
|---|---|
Use Scenario: Dynamic beam shaping in automotive headlights to selectively dim individual LEDs while maintaining full illumination elsewhere, avoiding glare to oncoming traffic. IC Role / Device Role / Timing Role: TPS92661QPHPRQ1 acts as the pixel-level shunt controller, receiving PWM commands from ECU MCU and executing synchronized on/off switching across 12-LED strings. Use Value: Enables sub-100-ms response time for beam adaptation, supported by <5 µs fault reporting and deterministic SYNC-based multi-device timing alignment. | Use Scenario: High-resolution brake/tail light patterns with animated signatures (e.g., sequential turn indicators, dynamic hazard flash) on premium vehicle rear modules. IC Role / Device Role / Timing Role: TPS92661QPHPRQ1 manages per-LED dimming and sequencing in compact 12-LED arrays mounted directly on thermally demanding metal-core boards. Use Value: Feed-through TQFP package and integrated 3.3-V LDO simplify layout on space-constrained rear lamp PCBs while maintaining AEC-Q100 reliability. |
| Automotive DRL/Position Light Arrays | High-Brightness LED Signage Modules |
Use Scenario: Daytime running lights requiring precise luminance uniformity and thermal stability across multiple parallel LED strings in front fascia applications. IC Role / Device Role / Timing Role: TPS92661QPHPRQ1 provides closed-loop brightness control via PWM duty cycle tuning and monitors open-circuit faults to ensure regulatory compliance. Use Value: 225 mΩ RDS(on) and 125°C max junction temperature rating sustain continuous operation at 2 A per channel under hood ambient conditions. | Use Scenario: Outdoor digital signage with high-reliability, high-contrast LED matrices operating in wide temperature ranges and subject to vibration. IC Role / Device Role / Timing Role: TPS92661QPHPRQ1 serves as ruggedized local LED driver node, decoupling MCU timing constraints from high-current switching events via UART buffering. Use Value: Multi-drop UART and hardware address pins allow scalable deployment across large signage panels without bus contention or protocol overhead. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED matrix management applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS92662QPHPRQ1 | Same 48-pin TQFP package and feature set, but includes integrated CAN transceiver for direct ECU bus communication | Eliminates need for external CAN PHY; suited for systems where CAN integration reduces BOM count and board space | Select TPS92662QPHPRQ1 when CAN interface is required and PCB layout allows for additional CAN termination components |
| MAX20051ATG/V+T | 12-channel automotive LED shunt controller with 16-bit PWM, higher RDS(on) (350 mΩ), and SPI interface instead of UART | Offers finer dimming resolution but lacks multi-drop UART and SYNC-based inter-device synchronization | Choose MAX20051ATG/V+T for applications prioritizing dimming granularity over network scalability or deterministic timing alignment |
Compared with TPS92661QPHPRQ1, TPS92662QPHPRQ1 adds CAN physical layer integration at no package or thermal penalty, while MAX20051ATG/V+T trades UART scalability and synchronization fidelity for higher PWM bit depth and SPI compatibility - both require revalidation of fault reporting latency, thermal derating, and PCB layout constraints.
Availability
TPS92661QPHPRQ1 is available at Aetrix Electronics and suitable for automotive headlight systems, adaptive driving beam (ADB) modules, and high-brightness LED matrix lighting requiring stable component supply, AEC-Q100 qualification, and long-term production continuity.
Supply support for TPS92661QPHPRQ1 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, embedded processing, and automotive ICs, with leadership in power management and automotive electronics.
The TPS92661QPHPRQ1 belongs to TI's automotive LED driver portfolio, designed specifically for adaptive front-lighting systems requiring pixel-level control, fault resilience, and seamless integration with buck-current-regulated LED strings.
FAQ
What is the maximum number of TPS92661QPHPRQ1 devices that can be daisy-chained on a single UART bus?
The TPS92661QPHPRQ1 supports up to eight devices on one multi-drop UART bus using its three hardware address pins (ADR0–ADR2), which provide a 3-bit address space (0–7). Each device must have a unique address assigned via VIN/GND connections; no software address programming is required. The TPS92661QPHPRQ1 UART implementation ensures reliable communication even with cable lengths typical in automotive headlight assemblies.
Does the TPS92661QPHPRQ1 require an external gate driver for its shunt MOSFETs?
No, the TPS92661QPHPRQ1 does not require an external gate driver. It integrates an internal charge pump that generates a 6.2-V rail referenced to the floating LED string node, enabling direct gate drive of all 12 shunt switches. This eliminates external high-voltage driver components and simplifies design for systems where the LED string operates up to 67 V above ground - a key feature confirmed in the SLUSBU2A datasheet Section 7.1 and Electrical Characteristics table.
How does the TPS92661QPHPRQ1 detect and report LED open-circuit faults?
The TPS92661QPHPRQ1 detects LED open circuits by monitoring voltage across each shunt switch. When an LED opens, the voltage at the switch node rises above the programmable open threshold (5–6.9 V), triggering internal protection circuitry. Fault status is reported within 5 µs via the UART interface using dedicated fault registers. This behavior is specified in Section 6.5 Electrical Characteristics and validated in Figure 8 of the SLUSBU2A datasheet.
Can the TPS92661QPHPRQ1 operate with a 3.3-V microcontroller interface?
Yes, the TPS92661QPHPRQ1 supports 3.3-V MCU interfacing via its VCC pin, which outputs a regulated 3.3-V supply for I/O buffers. The device accepts 4.5–5.5 V on VIN and internally regulates to 3.3 V on VCC (3.1–3.5 V range). For 3.3-V logic systems, connect MCU TX/RX directly to TPS92661QPHPRQ1's TX/RX pins and tie VCC to MCU VIO. Do not short VIN to VCC in this configuration - that is reserved for 5-V logic compatibility.
What thermal considerations apply to the TPS92661QPHPRQ1 in continuous 2-A per channel operation?
In continuous 2-A operation across all 12 channels, the TPS92661QPHPRQ1 dissipates power primarily via I²R losses in its shunt switches. With RALL(on) of 1.8–3.4 Ω (Section 6.5), worst-case power exceeds 7 W. The 48-pin TQFP package has RθJA = 25.7°C/W; thus, ambient must remain ≤85°C to keep junction temperature below 150°C. Proper thermal pad soldering to a 4-layer PCB with ≥4 thermal vias is mandatory - verified in TI's thermal characterization report SPRA953 and Layout Guidelines (Section 10).
TPS92661QPHPRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 48-PowerTQFP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- DC DC Regulator
- Topology:
- Switched Capacitor (Charge Pump)
- Internal Switch(s):
- Yes
- Number of Outputs:
- 13
- Voltage - Supply (Min):
- 4.5V
- Voltage - Supply (Max):
- 5.5V
- Voltage - Output:
- 60V
- Current - Output / Channel:
- 1.5A (Switch)
- Frequency:
- 2.3MHz
- Dimming:
- PWM
- Applications:
- -
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-HTQFP (7x7)
TPS92661QPHPRQ1 FAQ
1.How can I place an order for TPS92661QPHPRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS92661QPHPRQ1 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 TPS92661QPHPRQ1 reliable?
The price and inventory of TPS92661QPHPRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS92661QPHPRQ1 is usually 5 days.
3.What payment methods are accepted for TPS92661QPHPRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS92661QPHPRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS92661QPHPRQ1?
TPS92661QPHPRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS92661QPHPRQ1 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 TPS92661QPHPRQ1?
For technical support, including TPS92661QPHPRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS92661QPHPRQ1 requirements.
6.How does Aetrix verify that TPS92661QPHPRQ1 is sourced from the original manufacturer or authorized distributors?
All TPS92661QPHPRQ1 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 TPS92661QPHPRQ1 meets industry standards.
7.What is the process for return or replacement of TPS92661QPHPRQ1?
All TPS92661QPHPRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS92661QPHPRQ1, 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 TPS92661QPHPRQ1 part is unused and in its original packaging.
Return procedure for TPS92661QPHPRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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