ISL97691 Datasheet | Renesas

features dynamic headroom control that monitors the highest LED forward voltage string and uses its feedback signal for the minimum output regulation. The ISL97691 incorporates extensive protection functions including string open and short circuit detections, OVP, and OTP. The switching frequency can be adjusted from 400k Hz to 1.5MHz. The device is offered in a 16 Ld TQFN 3x3mm package and can operate in ambient temperature from -40°C to +85°C. Features - 2.4V minimum input voltage, no need for higher voltage supplies - 4 x 60m A (Note 1) and 4 x 40m A (Note 2) LED current - 2 groups of independent analog and pwm current controls - 1-wire interfaces for 6-bit analog dimming - PWM inputs for PWM dimming - 0.005% minimum PWM dimming duty cycle at 100Hz - Low 0.8m A quiescent current - ±2.5% current matching - Adjustable switching frequency from 400k Hz to 1.5MHz - Fault protection - OVP, OTP, channel open/short circuit protections NOTES: 1. Not exceeding 30% of the frame rate (1/t FRAME), with VIN > 2.7V and TA < +55°C. 2. VIN > 2.7V Applications - Tablet, notebook PC, and smart phone displays LED backlighting - Mobile displays for 2D or 3D LED backlighting Related Literature - For a full list of related documents, visit our website - ISL97691 product page VIN = 2.7V~5.5V 4.7µF 10 L1 10µH D1 VOUT = 24.5V, 4 x 60m A- 4.7µF 4.7µF 1µF 15n F 12k 17.8k VIN P LX OVP ISET AGND PGND 100p F 470k 2.2n F 23.7k 143k 1-WIRE_1 1-WIRE_2 PWM2 PWM_1 CH1 CH2 CH3...