Calculation tool
TPS92691-Q1
Automotive multi-topology LED driver with rail-to-rail current sense amplifier
Data sheet
TPS92691-Q1
- Wide Input Voltage: 4.5 V to 65 V
- Wide Output Voltage Range: 2 V to 65 V
- Low Input Offset Rail-to-Rail Current Sense Amplifier
- Better than ±3% LED Current Accuracy over 25°C to 140°C Junction Temperature Range
- Compatible With High-Side and Low-Side Current Sense Implementations
- High-Impedance Analog LED Current Adjust Input (IADJ) With over 15:1 Contrast Ratio
- Over 1000:1 Series FET PWM Dimming Ratio With Integrated Series N-Channel Dim Driver Interface
- Continuous LED Current Monitor Output for System Fault Detection and Diagnoses
- Programmable Switching Frequency With External Clock Synchronization Capability
- Programmable Soft-Start and Slope Compensation
- Comprehensive Fault Protection Circuitry Including VCC Undervoltage Lockout (UVLO), Output Overvoltage Protection (OVP), Cycle-by-Cycle Switch Current Limit, and Thermal Protection
- TPS92691-Q1: Automotive Q100 Grade 1 Qualified
The TPS92691/-Q1 is a versatile LED controller that can support a range of step-up or step-down driver topologies. The device implements a fixed-frequency peak current mode control technique with programmable switching frequency, slope compensation, and soft-start timing. It incorporates a high voltage (65-V) rail-to-rail current sense amplifier that can directly measure LED current using either a high-side or a low-side series sense resistor. The amplifier is designed to achieve low input offset voltage and attain better than ±3% LED current accuracy over junction temperature range of 25°C to 140°C and output common-mode voltage range of 0 to 60 V.
LED current can be independently modulated using either analog or PWM dimming techniques. Linear analog dimming response with 15:1 range is obtained by varying the voltage from 140 mV to 2.25 V across the high impedance analog adjust (IADJ) input. PWM dimming of LED current is achieved by modulating the PWM input pin with the desired duty cycle and frequency. Optional DDRV gate driver output can be used to enable series FET dimming functionality to get over 1000:1 contrast ratio.
The TPS92691/-Q1 supports continuous LED status check through the current monitor (IMON) output. This allows for LED short circuit or open circuit detection and protection. Additional fault protection features include VCC UVLO, output OVP, switch cycle-by-cycle current limit, and thermal protection.
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Technical documentation
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View all 6 | Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | TPS92691/-Q1 Multi-Topology LED Driver With Rail-to-Rail Current Sense Amplifier datasheet | PDF | HTML | 11 Dec 2015 |
| White paper | LED Drivers for Automotive Exterior Applications (Rev. B) | 27 Mar 2018 | ||
| Selection guide | 汽车外部照明应用的LED驱动器 | 15 Mar 2018 | ||
| Technical article | Lighting the road ahead: LEDs in automotive front lighting | PDF | HTML | 29 Sep 2016 | |
| EVM User's guide | TPS92691 Boost and Boost-to-Battery LED Driver Evaluation Board | 11 Mar 2016 | ||
| EVM User's guide | TPS92691 SEPIC LED Driver Evaluation Board | 09 Dec 2015 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.
Evaluation board
TPS92691EVM-001 — TPS92691 SEPIC LED Driver Evaluation Board
The TPS92691EVM-001 is a fully assembled and tested SEPIC LED driver designed to power a single string of series connected LEDs. Acurate closed-loop LED current regulation is achieved using a low-offset rail-to-rail curren sense amplifier that is compatible with either a high side or a low side (...)
User guide: PDF
Evaluation board
TPS92691EVM-752 — TPS92691-Q1 Boost and Boost-to-Battery LED Driver Evaluation Board
The TPS92691EVM-752 is a fully assembled and tested LED driver that can be configured as either a boost or a boost-to-battery topology to power a single string of series-connected LEDs. Accurate closed-loop LED current regulation is achieved using a low-offset rail-to-rail current-sense amplifier (...)
User guide: PDF
Simulation model
TPS92691-Q1 Boost and SEPIC PSpice Transient Model (Rev. A)
SLVMBE8A.ZIP (153 KB) - PSpice Model
Simulation tool
PSPICE-FOR-TI — PSpice® for TI design and simulation tool
PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Reference designs
TIDA-01382 — Automotive Daytime Running Light (DRL) LED Driver Reference Design with Linear Thermal Foldback
The TIDA-01382 reference design is a precision pulse width modulation (PWM) dimming solution for daytime running lights (DRL) including thermal foldback without requiring a microcontroller (MCU). The design includes key peripherals like electromagnetic interference (EMI) filtering, electromagnetic (...)
Reference designs
PMP15003 — Dimmable LED Driver Reference Design For Aftermarket Light Bars, Spot Lights, and Flood Lights
This in an automotive boost LED driver designed to drive an LED string of up to 34V at a maximum of 34W of output power. This solution as designed passes CISPR 25 class 3 EMC requirements and is capable of 10:1 analog dimming. High side current sensing allows one end of the LED string to be tied (...)
Reference designs
PMP15027 — High-Current SEPIC Reference Design for Automotive Lighting and ADAS Systems
This reference design is ideal for high-current pulse operation of IR LEDs at up to 3A for automotive ADAS systems. It is capable of continuous and pulsed operation even through load dump and warm crank events. Other features include analog dimming and CISPR-25 class 3 EMI filtering.
Reference designs
TIDA-01381 — Automotive Multiple Channel Temperature Sensing for LED Headlight Reference Design
This reference design details how to drive a string of matrix LED headlights, measure the temperature of the LEDs and implement support for thermal foldback which reduces the current in the LEDs as the LED temperature rises to prevent damage to the LEDs. The design uses temperature sensing (...)
Reference designs
TIDA-01183 — Precision PWM Dimming LED Driver Reference Design for Automotive Lighting
This reference design shows how to use pulse width modulation (PWM) to dim an automotive headlight or tail light with precision of better than 2% duty cycle without the necessity of using a microcontroller. This allows the design to be cost competitive. Devices used in this design are the (...)
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| HTSSOP (PWP) | 16 | Ultra Librarian |
Ordering & quality
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