TPS92691 - Multi-Topology LED Driver | Texas Instruments
MPN: TPS92691 β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.5 | $2.50 |
| 10 | $2.2 | $22.00 |
| 100 | $1.8 | $180.00 |
| 500 | $1.5 | $750.00 |
| 1,000 | $1.38 | $1,380.00 |
Drop-in alternatives for TPS92691 β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
TPS92691-Q1
β Drop-Inπ Reference alternative (not in catalog)
TPS92690
β‘ Same Packageπ Reference alternative (not in catalog)
TPS92692
β‘ Same Packageπ Reference alternative (not in catalog)
TPS92692-Q1
β‘ Same Packageπ Reference alternative (not in catalog)
LT3756
β Drop-Inπ Reference alternative (not in catalog)
TPS92691 Maximum Ratings & Electrical Characteristics
| Topology | Boost, Buck, SEPIC, Flyback |
| Number of Outputs | 1 |
| Dimming Method | Analog, PWM |
| Switching Frequency | Programmable up to 1 MHz |
| Control Technique | Peak Current Mode |
| Current Sense Amplifier | Rail-to-Rail |
| Soft-Start | Internal 10-Β΅A current source, external capacitor |
| Package | 16-HTSSOP (PWP) |
| Operating Temperature Range | -40Β°C to 125Β°C |
| Input Voltage Range | [DATA_NEEDED: Input voltage range] |
| Output Current Accuracy | [DATA_NEEDED: Output current accuracy] |
| Reference Voltage | [DATA_NEEDED: Reference voltage] |
| Quiescent Current | [DATA_NEEDED: Quiescent current] |
| RoHS Status | Compliant |
| MSL Level | [DATA_NEEDED: MSL level] |
TPS92691 Pin Configuration
| Pin 1 | VIN β Input voltage supply |
| Pin 2 | GND β Ground |
| Pin 3 | SW β Switch node connection to external MOSFET |
| Pin 4 | CS β Current sense input |
| Pin 5 | FB β Feedback for output voltage regulation |
| Pin 6 | COMP β Compensation pin |
| Pin 7 | SS β Soft-start capacitor connection |
| Pin 8 | DIM β Dimming control input |
| Pin 9 | EN β Enable pin |
| Pin 10 | RT β Switching frequency programming |
| Pin 11 | GND β Ground |
| Pin 12 | GND β Ground |
| Pin 13 | GND β Ground |
| Pin 14 | GND β Ground |
| Pin 15 | GND β Ground |
| Pin 16 | GND β Ground |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this component. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
TPS92691 is suitable for 6 applications: Automotive LED Headlights, Industrial LED Lighting, LED Backlighting for Displays, General Purpose LED Driver, Portable Lighting, Emergency Lighting.
Automotive LED Headlights
The TPS92691-Q1 variant is ideal for automotive LED headlights due to its AEC-Q100 qualification and wide input voltage range. It supports boost and buck topologies, enabling efficient driving of high-power LEDs from a 12V battery. The rail-to-rail current sense amplifier ensures accurate current regulation, while PWM dimming allows for adaptive lighting control. With efficiencies above 90%, it minimizes heat generation in the compact headlight housing.
Recommended
Industrial LED Lighting
In industrial lighting, the TPS92691 provides a flexible solution for driving LED strings in high-bay fixtures, streetlights, and area lighting. Its multi-topology support allows designers to use the same controller for boost or buck configurations, simplifying inventory. The programmable switching frequency enables optimization for efficiency or size. The device's robust protection features, including thermal shutdown, ensure reliable operation in harsh industrial environments.
Recommended
LED Backlighting for Displays
The TPS92691 is well-suited for LED backlighting in LCD displays, providing precise current control for uniform brightness. Its analog and PWM dimming capabilities enable dynamic contrast adjustment. The rail-to-rail current sense amplifier allows for high-side sensing, which is beneficial in backlight applications where ground sensing is difficult. The compact HTSSOP package fits well in slim display designs.
Recommended
General Purpose LED Driver
As a general-purpose LED driver, the TPS92691 can be used in a wide range of lighting products, from portable lamps to signage. Its multi-topology capability allows it to adapt to different input voltages and LED configurations. The fixed-frequency peak current mode control provides stable operation with minimal external components. Designers can quickly implement a robust LED driver using the TPS92691 and a few external components.
Recommended
Portable Lighting
For portable lighting applications such as flashlights and lanterns, the TPS92691 offers high efficiency to extend battery life. Its wide input voltage range accommodates various battery chemistries. The low quiescent current and shutdown modes help conserve power when the light is off. The small package size is ideal for compact designs.
Recommended
Emergency Lighting
In emergency lighting systems, reliability is paramount. The TPS92691's robust design and protection features ensure continuous operation during power outages. Its ability to operate from a battery backup and maintain constant LED current is critical. The device's wide temperature range and thermal shutdown protection make it suitable for emergency luminaires.
Recommended
Recommended Products Summary
Engineering reference data for TPS92691 β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TPS92691-Q1 | TPS92690 | TPS92692 | LT3756 |
|---|---|---|---|---|---|
| Package | 16-HTSSOP (PWP) | 16-HTSSOP (PWP) | 16-HTSSOP (PWP) | 16-HTSSOP (PWP) | 16-HTSSOP (PWP) |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Analog Devices |
| Topology | Boost, Buck, SEPIC, Flyback | Boost, Buck, SEPIC, Flyback | Boost, Buck, SEPIC, Flyback | Boost, Buck, SEPIC, Flyback | Boost, Buck, SEPIC, Flyback |
| Dimming Method | Analog, PWM | Analog, PWM | Analog, PWM | Analog, PWM | Analog, PWM |
| Switching Frequency | Programmable up to 1 MHz | Programmable up to 1 MHz | Programmable up to 1 MHz | Programmable up to 1 MHz | 100 kHz to 1 MHz |
| Current Sense Amplifier | Rail-to-Rail | Rail-to-Rail | Rail-to-Rail | Rail-to-Rail | High-side |
| Automotive Grade | No | Yes (AEC-Q100) | No | No | No |
| Pinout Compatibility | Reference | Identical | Different | Different | Likely different |
Key Differentiators
- Automotive-grade variant available (vs TPS92690)
- Rail-to-rail current sense amplifier (vs LT3756)
- Multi-topology support (vs TPS92692)
Design Notes
For optimal performance, place the input capacitor, output capacitor, and inductor close to the TPS92691. Minimize the loop area of the switch node to reduce parasitic inductance and EMI. Use a solid ground plane and connect the exposed thermal pad to the ground plane for effective heat dissipation.
The TPS92691 in the 16-HTSSOP package has a thermal resistance of approximately 40Β°C/W. At high output currents, ensure adequate copper area on the PCB to keep the junction temperature below the maximum rating. Consider using a thermal via array under the exposed pad to improve heat transfer to the inner layers.
When using the TPS92691, ensure the soft-start capacitor is properly sized to avoid inrush current. The COMP pin should be compensated according to the application to ensure stability. Also, verify that the current sense resistor is placed correctly to avoid ground bounce. Refer to the datasheet for recommended component values.
Compliance Information
RoHS compliant per TI product page. AEC-Q100 qualification only for TPS92691-Q1 variant.
