ISL97691
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),...
