Overview
Description
The ISL6745ALEVAL3Z is a low cost, high performance LED driver with power factor correction (PFC) function that is compatible with widely used wall dimmers. It uses Renesas' ISL6745A voltage mode PWM controller to operate a SEPIC converter in discontinuous conduction mode (DCM).
The ISL6745A is a low-cost, double-ended voltage-mode PWM controller designed for half-bridge and full-bridge power supplies and line-regulated bus converters. It provides precise control of switching frequency, adjustable soft-start and overcurrent shutdown.
The evaluation board design gives high flexibility on both the input side and output load. With the same circuit configuration, it works well with and without a triac dimmer.
Features
- Input VAC: 50V ~ 140V
- Typical power factor PF: 0.98
- Typical efficiency η: 80%
- Output current ILED: 10mA ~ 670mA
- Output voltage VOUT: 10V ~ 46V
- Switching frequency FS: 100kHz
- Output voltage ripple VRPP: 50mV(P-P)
Applications
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