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.
| 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 | 29 Sep 2016 | ||
| Technical article | Here's how body electronics and lighting technology are changing the driving experience | 26 Sep 2016 | ||
| Technical article | LED brightness adjustment: high-frequency PWM dimming | 26 Aug 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 | ||
| Technical article | Take better selfies with innovative LED flashes | 18 Nov 2014 |
For additional terms or required resources, click any title below to view the detail page where available.
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 (...)
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 (...)
| Package | Pins | Download |
|---|---|---|
| HTSSOP (PWP) | 16 | View options |
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