Update: 28 September, 2023
The ML4818 is a complete phase modulation control IC suitable for full bridge soft switching converters. Unlike conventional PWM circuits, the phase modulation technique allows for zero-voltage switching transitions and square wave drive across the transformer. The IC modulates the phases of the two sides of the bridge to control output power. The ML4818 can be operated in current mode. The delay times for the outputs are externally programmable to allow the zero-voltage switching transitions to take place. Pulse-by-pulse current limit, integrating fault detection, and soft start reset are provided. The under-voltage lockout circuit features a 6V hysteresis with a low starting current to allow off-line start up with a low power bleed resistor. A shutdown function powers down the IC, putting it into a low quiescent state.
File format: PDF
Size: -
MD5 Checksum: 0B60F83B61ECC531714A60E9BC2FA227
Publication date: 09 May, 2012
Downloads: -
PDF Link: FAIRCHILD SEMICONDUCTOR ML4818 Manual PDF