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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > LED Drivers

Texas Instruments TPS92691QPWPQ1

Name: TPS92691QPWPQ1
Brand: Texas Instruments
SKU: TPS92691QPWPQ1
Price: 2.40 USD
Availability: InStock
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Part No.:: TPS92691QPWPQ1

Manufacturer:: Texas Instruments

Category:: LED Drivers

Package:: 16-PowerTSSOP (0.173", 4.40mm Width)

Datasheet:: TPS92691QPWPQ1.pdf

Description:: IC LED DRIVER CTRLR PWM 16HTSSOP

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Product details

Overview

TPS92691QPWPQ1 from Texas Instruments is an automotive-grade LED controller IC supporting boost, buck, and buck-boost topologies for constant-current LED string driving. It operates from 4.5 V to 65 V input, delivers up to 65 V output, achieves ±3% LED current accuracy over –40°C to 140°C, and integrates a rail-to-rail current sense amplifier with 0–60 V common-mode range - used in exterior automotive lighting systems requiring high reliability and thermal robustness.

For engineers reviewing the TPS92691QPWPQ1 datasheet, TPS92691QPWPQ1 pinout, TPS92691QPWPQ1 application, or TPS92691QPWPQ1 equivalent, key selection criteria include its programmable 80–700 kHz switching frequency, 1000:1 PWM dimming ratio with integrated DDRV gate driver, analog dimming via IADJ (140 mV–2.25 V), cycle-by-cycle current limiting, and AEC-Q100 Grade 1 qualification.

Technical Context

The TPS92691QPWPQ1 implements fixed-frequency peak current mode control with programmable slope compensation and soft-start timing. Its rail-to-rail current sense amplifier supports both high-side and low-side shunt configurations, enabling flexible topology implementation across wide output voltage ranges (2 V–65 V) while maintaining better than ±3% LED current accuracy from –40°C to 140°C junction temperature.

It features dual gate drivers - GATE for main power switch control and DDRV for external series N-channel FET dimming - plus comprehensive fault protection including OVP (programmable hysteresis), VCC UVLO (4.1 V rise / 4.0 V fall), thermal shutdown (175°C), and cycle-by-cycle current limit (525 mV threshold). The IMON output provides continuous linear LED current monitoring for open/short detection.

Key Specifications

Parameter	Value and Actual Design Meaning
Input Voltage Range	4.5 V to 65 V - supports cold-crank (4.5 V) and load-dump transients in automotive systems without external pre-regulation.
Output Voltage Range	2 V to 65 V - enables driving 1–20+ white LEDs in series across boost/buck/buck-boost configurations.
LED Current Accuracy	Better than ±3% over –40°C to 140°C - ensures stable luminance in under-hood and headlamp environments.
Switching Frequency	80 kHz to 700 kHz (programmable via RT resistor) - balances EMI, efficiency, and MOSFET loss trade-offs.
PWM Dimming Ratio	Over 1000:1 - achieved using DDRV-driven external series FET, critical for adaptive driving beam (ADB) systems.
Analog Dimming Range	15:1 linear response - enabled by high-impedance IADJ input (140 mV–2.25 V), supporting thermal derating and calibration.
Current Sense Common-Mode	0 V to 60 V - allows direct high-side or low-side sensing without level-shifting circuitry.
AEC-Q100 Grade	Grade 1 (–40°C to 125°C ambient) - qualified for front-end automotive lighting including headlights and DRLs.

Pinout & Package

TPS92691QPWPQ1 is housed in a thermally enhanced 16-pin HTSSOP (PWP) package with exposed PowerPAD™ measuring 5.10 mm × 6.60 mm. The PowerPAD must be soldered to PCB ground plane using multiple vias for optimal thermal performance and electrical integrity.

Pin/Terminal	Circuit Role	Design Meaning
VIN	Input supply rail	Bypassed to AGND with 100 nF capacitor; powers internal LDO generating VCC (7.5 V).
SS	Soft-start control	Capacitor-connected node sets startup ramp time; shorting to AGND disables switching.
RT/SYNC	Oscillator programming/synchronization	Resistor sets switching frequency (80–700 kHz); AC-coupled external clock enables synchronization.
PWM	Digital dimming input	Schmitt-trigger input (2.0–2.7 V thresholds); controls GATE/DDRV and oscillator enable/disable.
COMP	Error amplifier output	Transconductance output (121 µA/V) requiring external RC network for loop stability.
IADJ	Analog current reference	High-impedance input (90 nA bias) accepting 140 mV–2.25 V to set LED current threshold linearly.
IMON	LED current monitor	Linear output: V_IMON = 14 × I_LED × R_CS; used for fault detection (open/short) and diagnostics.
AGND	Analog ground reference	Return for internal references and analog circuitry; must connect to PowerPAD and system AGND.
CSN / CSP	Current sense differential inputs	Rail-to-rail inputs (0–60 V common-mode) measuring V_CSP–CSN across sense resistor R_CS.
DDRV	Dimming FET gate driver	Push-pull N-channel driver (6.1 Ω high-side / 5.2 Ω low-side) for external series dimming FET.
OVP	Overvoltage protection input	Resistor-divider input setting OVP threshold (1.24 V typical) with programmable hysteresis.
PGND	Power ground return	Return path for GATE/DDRV drivers and IS current sense; connects to PowerPAD and system PGND.
IS	Switch current sense	Monitors MOSFET source current via R_IS; triggers cycle-by-cycle limit at 525 mV threshold.
GATE	Main switch gate driver	N-channel driver (5.4 Ω high-side / 4.3 Ω low-side) capable of 500 mA peak current.
VCC	Bias supply output	Regulated 7.5 V output (±0.5 V) powering internal circuitry; bypassed with 2.2–4.7 µF ceramic cap to PGND.

Key Features

Feature	Design Value
Rail-to-rail current sense amplifier	0–60 V common-mode range with <±5.9 mV offset over –40°C to 140°C - enables accurate high-side sensing in boost configurations without level shifters.
Integrated DDRV gate driver	Optimized for series N-FET dimming with 5.2–12.8 Ω drive strength - delivers >1000:1 contrast ratio required for ADB and matrix lighting.
Programmable soft-start & slope compensation	SS pin capacitor sets ramp time; internal slope compensation prevents subharmonic oscillation in duty cycles >50% - ensures stable operation across topologies.
Continuous LED current monitor (IMON)	Linear 14× gain output referenced to AGND - enables real-time open/short detection and cable harness diagnostics independent of driver topology.
Comprehensive fault protection	Includes VCC UVLO (4.1 V/4.0 V), OVP (1.24 V threshold), thermal shutdown (175°C), and cycle-by-cycle current limit (525 mV) - meets ASIL-B functional safety requirements.
AEC-Q100 Grade 1 qualification	Validated for –40°C to 125°C ambient operation with HBM ±2000 V / CDM ±500 V ESD robustness - certified for front-of-vehicle lighting applications.

Applications

Automotive Headlamps	Adaptive Driving Beam (ADB)
Use Scenario: High-brightness LED arrays in projector-based headlamps requiring precise current regulation and thermal stability under hood temperatures up to 125°C ambient. IC Role / Device Role / Timing Role: Constant-current LED controller implementing boost topology with rail-to-rail current sensing and DDRV-driven series dimming FETs. Use Value: ±3% current accuracy over temperature ensures consistent lumen output; IMON enables real-time LED open-circuit detection for fail-safe beam shaping.	Use Scenario: Pixelated LED modules where individual segments are dynamically dimmed to avoid glare while illuminating road signs and pedestrians. IC Role / Device Role / Timing Role: PWM dimming controller with >1000:1 contrast ratio via DDRV output, synchronized across multiple channels using RT/SYNC pin. Use Value: Sub-100 ns PWM-to-DDRV propagation delay (54 ns rise / 72 ns fall) enables precise segment timing; programmable OVP protects against transient-induced overvoltage during rapid dimming transitions.
Daytime Running Lights (DRL)	Commercial Vehicle Lighting
Use Scenario: Compact, thermally constrained DRL modules mounted near grille or bumper, subject to wide input voltage swings (6–16 V battery + load dump). IC Role / Device Role / Timing Role: Buck-boost LED controller supporting 4.5–65 V input, regulating constant current despite battery voltage fluctuations and cold-crank conditions. Use Value: Wide VIN range eliminates need for pre-regulator; soft-start (SS pin) prevents inrush current during ignition; VCC UVLO ensures clean startup at 4.1 V.	Use Scenario: Heavy-duty truck tail lamps and marker lights requiring long-life, high-reliability LED drivers operating in harsh vibration and temperature cycling environments. IC Role / Device Role / Timing Role: Robust LED controller with AEC-Q100 Grade 1 qualification, thermal shutdown (175°C), and hysteresis-based OVP for sustained outdoor exposure. Use Value: 140°C max junction temperature rating and PowerPAD thermal design support 20+ year field life; IMON output interfaces directly with vehicle CAN bus diagnostics.

Automotive Headlamps

Adaptive Driving Beam (ADB)

Use Scenario: High-brightness LED arrays in projector-based headlamps requiring precise current regulation and thermal stability under hood temperatures up to 125°C ambient.

IC Role / Device Role / Timing Role: Constant-current LED controller implementing boost topology with rail-to-rail current sensing and DDRV-driven series dimming FETs.

Use Value: ±3% current accuracy over temperature ensures consistent lumen output; IMON enables real-time LED open-circuit detection for fail-safe beam shaping.

Use Scenario: Pixelated LED modules where individual segments are dynamically dimmed to avoid glare while illuminating road signs and pedestrians.

IC Role / Device Role / Timing Role: PWM dimming controller with >1000:1 contrast ratio via DDRV output, synchronized across multiple channels using RT/SYNC pin.

Use Value: Sub-100 ns PWM-to-DDRV propagation delay (54 ns rise / 72 ns fall) enables precise segment timing; programmable OVP protects against transient-induced overvoltage during rapid dimming transitions.

Daytime Running Lights (DRL)

Commercial Vehicle Lighting

Use Scenario: Compact, thermally constrained DRL modules mounted near grille or bumper, subject to wide input voltage swings (6–16 V battery + load dump).

IC Role / Device Role / Timing Role: Buck-boost LED controller supporting 4.5–65 V input, regulating constant current despite battery voltage fluctuations and cold-crank conditions.

Use Value: Wide VIN range eliminates need for pre-regulator; soft-start (SS pin) prevents inrush current during ignition; VCC UVLO ensures clean startup at 4.1 V.

Use Scenario: Heavy-duty truck tail lamps and marker lights requiring long-life, high-reliability LED drivers operating in harsh vibration and temperature cycling environments.

IC Role / Device Role / Timing Role: Robust LED controller with AEC-Q100 Grade 1 qualification, thermal shutdown (175°C), and hysteresis-based OVP for sustained outdoor exposure.

Use Value: 140°C max junction temperature rating and PowerPAD thermal design support 20+ year field life; IMON output interfaces directly with vehicle CAN bus diagnostics.

Equivalent & Alternatives

The following parts are listed as comparable options for similar LED controller applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
LM3410XQMF/NOPB	Fixed 1.6 MHz switching frequency; no DDRV output; no IMON; lower VIN max (42 V); no AEC-Q100 grade.	Limited to low-power, non-automotive boost LED drivers without diagnostic capability or high-contrast dimming.	Select only for cost-sensitive, non-safety-critical interior lighting where 1000:1 dimming and diagnostics are unnecessary.
TPS92515QDGQRQ1	Integrated 2-A MOSFET; fixed 2.2 MHz frequency; no RT/SYNC; no DDRV; supports only buck topology; smaller 10-pin WQFN.	Targeted at space-constrained, single-topology (buck-only) automotive lighting with lower current (<2 A) and no series-FET dimming requirement.	Choose when board area is critical and system uses only buck configuration with ≤2 A LED current - trades flexibility for integration.

Compared with LM3410XQMF/NOPB and TPS92515QDGQRQ1, the TPS92691QPWPQ1 uniquely combines multi-topology support, DDRV-driven 1000:1 PWM dimming, IMON-based diagnostics, and full AEC-Q100 Grade 1 qualification - making it the only option for high-performance, safety-compliant automotive exterior lighting requiring topology flexibility and system-level fault visibility.

Availability

TPS92691QPWPQ1 is available at Aetrix Electronics and suitable for automotive headlamps, adaptive driving beam systems, and commercial vehicle lighting requiring stable component supply, long-term lifecycle support, and AEC-Q100 compliance.

Supply support for TPS92691QPWPQ1 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 power management technologies with decades of automotive IC experience.

The TPS92691QPWPQ1 belongs to TI's automotive LED controller product line, designed specifically for high-reliability exterior lighting applications demanding wide input range, precise current regulation, and comprehensive fault diagnostics.

FAQ

What is the maximum LED string voltage supported by the TPS92691QPWPQ1?

The TPS92691QPWPQ1 supports an output voltage range up to 65 V, enabling it to drive LED strings with forward voltages up to that limit - sufficient for 15–20 white LEDs in series. Its rail-to-rail current sense amplifier maintains accuracy across the full 0–60 V common-mode range, ensuring stable regulation even at high output voltages. This capability is confirmed in the datasheet's "Wide Output Voltage Range: 2 V to 65 V" specification and Figure 14 (VIMON vs V(CSP-CSN)).

Does the TPS92691QPWPQ1 support both high-side and low-side current sensing?

Yes, the TPS92691QPWPQ1 supports both high-side and low-side current sensing via its rail-to-rail current sense amplifier with inputs CSP and CSN. The amplifier operates over a 0–60 V common-mode voltage range, allowing direct connection to either side of the sense resistor regardless of topology - explicitly stated in the "Features" section as "Compatible With High-Side and Low-Side Current Sense Implementations."

How is PWM dimming implemented on the TPS92691QPWPQ1?

PWM dimming on the TPS92691QPWPQ1 is implemented through the dedicated PWM pin, which directly controls GATE and DDRV outputs and modulates the internal oscillator. For >1000:1 contrast ratio, the DDRV output drives an external series N-channel FET. The datasheet specifies 54 ns rise and 72 ns fall propagation delays from PWM to DDRV, enabling high-speed, precise dimming essential for adaptive driving beam systems.

What protection features does the TPS92691QPWPQ1 include?

The TPS92691QPWPQ1 includes VCC undervoltage lockout (UVLO), output overvoltage protection (OVP), cycle-by-cycle switch current limiting, thermal shutdown (175°C), and remote shutdown via SS pin. OVP threshold is programmable via resistor divider on the OVP pin (1.24 V typical), and UVLO has 4.1 V rising / 4.0 V falling thresholds with 100 mV hysteresis - all verified in Section 6.5 Electrical Characteristics.

Is the TPS92691QPWPQ1 pin-compatible with any other TI LED controllers?

No, the TPS92691QPWPQ1 is not pin-compatible with other TI LED controllers such as TPS92515QDGQRQ1 or LM3410XQMF/NOPB. Its 16-pin HTSSOP layout, PowerPAD grounding scheme, and unique pin functions (e.g., DDRV, IMON, RT/SYNC dual-role) are specific to this device. Pin compatibility is not claimed in the datasheet, and substitution requires PCB redesign.

TPS92691QPWPQ1 Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: -

Package/Case:: 16-PowerTSSOP (0.173", 4.40mm Width)

Packaging:: Tube

Product Status:: Active

Type:: DC DC Controller

Topology:: Flyback, SEPIC, Step-Down (Buck), Step-Up (Boost)

Internal Switch(s):: No

Number of Outputs:: 1

Voltage - Supply (Min):: 4.5V

Voltage - Supply (Max):: 65V

Voltage - Output:: 65V

Current - Output / Channel:: -

Frequency:: 80kHz ~ 700kHz

Dimming:: Analog, PWM

Applications:: Lighting

Operating Temperature:: -40°C ~ 125°C (TA)

Grade:: Automotive

Qualification:: AEC-Q100

Mounting Type:: Surface Mount

Supplier Device Package:: 16-HTSSOP

TPS92691QPWPQ1 FAQ

1.How can I place an order for TPS92691QPWPQ1 through Aetrix?

Please submit a Request for Quotation (RFQ) for TPS92691QPWPQ1 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 TPS92691QPWPQ1 reliable?

The price and inventory of TPS92691QPWPQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS92691QPWPQ1 is usually 5 days.

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Once your TPS92691QPWPQ1 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 TPS92691QPWPQ1?

For technical support, including TPS92691QPWPQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS92691QPWPQ1 requirements.

6.How does Aetrix verify that TPS92691QPWPQ1 is sourced from the original manufacturer or authorized distributors?

All TPS92691QPWPQ1 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 TPS92691QPWPQ1 meets industry standards.

7.What is the process for return or replacement of TPS92691QPWPQ1?

All TPS92691QPWPQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS92691QPWPQ1, 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 TPS92691QPWPQ1 part is unused and in its original packaging.

Return procedure for TPS92691QPWPQ1:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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