ISL6753 is a high-performance, low-pin-count alternative, zero-voltage switching (ZVS) full-bridge PWM controller. Like the ISL6551, it achieves ZVS operation by driving the upper bridge FETs at a fixed 50% duty cycle while the lower bridge FETS are trailing-edge modulated with adjustable resonant switching delays. Compared to the more familiar phase-shifted control method, this algorithm offers equivalent efficiency and improved overcurrent and light- load performance with less complexity in a lower pin count package. This advanced BiCMOS design features low operating current, adjustable oscillator frequency up to 2MHz, adjustable soft-start, internal over temperature protection, precision deadtime and resonant delay control, and short propagation delays. Additionally, Multi-Pulse Suppression ensures alternating output pulses at low duty cycles where pulse skipping may occur.
The ISL6753 is a high‑performance, low‑pin‑count zero‑voltage‑switching (ZVS) full‑bridge PWM controller. It offers adjustable oscillator frequency up to 2 MHz, soft‑start, over‑temperature protection, and precise dead‑time control.
The document provides absolute maximum ratings, recommended operating conditions, electrical specifications, pin descriptions, layout guidelines, and package dimensions for the QSOP‑16 lead package.
| Supply Voltage (VDDGND) | 0.3 V to +20.0 V |
|---|---|
| Peak Gate Current | 0.1 A |
| Oscillator Frequency | up to 2 MHz |
The device can be powered from 0.3 V up to +20.0 V.
The internal oscillator can be programmed up to 2 MHz.
The peak gate current is rated at 0.1 A.