The ISL97632 is an efficient and highly integrated PWM boost LED driver that is suitable for 1.8” to 3.5” LCDs that employ 2 to 6 white LEDs for backlighting. With integrated Schottky diode, OVP, and dynamic digital dimming capability, the ISL97632 provides a simple, reliable, and flexible solution to the backlight designers.
The ISL97632 is an efficient, highly integrated PWM boost LED driver designed for LCD backlighting. It operates from 2.4 V to 5.5 V, supports -40 °C to +85 °C ambient temperature, and is offered in an 8‑lead TDFN package.
It features a single‑wire 5‑bit digital interface that provides 32 linear dimming steps, an enable pin for shutdown or zero‑brightness mode, and selectable over‑voltage protection (14 V, 18 V, 26 V) for 3‑, 4‑, or 6‑LED configurations.
| Number of LEDs (series) | up to 6 LEDs |
|---|---|
| Digital Dimming Resolution | 5‑bit (32 steps) |
| Switching Frequency | ~1.45 MHz |
| Efficiency | up to 86 % |
| Package Type | 8‑lead TDFN (2 mm × 3 mm) |
| OVP Options | 14 V, 18 V, 26 V |
| Quiescent Current (shutdown) | 1 pA |
| Operating Temperature Range | -40 °C to +85 °C |
It can drive up to six LEDs in series.
Brightness is set with a 5‑bit single‑wire digital interface providing 32 linear steps.
OVP thresholds are 14 V for 3 LEDs, 18 V for 4 LEDs, and 26 V for 6 LEDs.