Update: 29 September, 2023
The FAN1577A is a high-efficiency, voltage-mode, dual-channel, synchronous DC/DC PWM controller for two independent outputs. The two channels are operated out of phase. The internal reference voltage is trimmed to 0.7V±1.0%. It is connected to the error amplifier's positive terminal for voltage feedback regulation. A soft-start circuit ensures the output voltage can be gradually and smoothly increased from zero to its final regulated value. The soft-start pin can also be used for chip-enable function. When two soft-start pins are grounded, the chip is disabled, and the total operation current can be reduced to under 0.7mA. The fixed-frequency is programmable from 61kHz to 340kHz. It also includes features such as programmable over-current protection (OCP) and output over-voltage protection (OVP).
File format: PDF
Size: -
MD5 Checksum: 72634BC9FBCAB490CCEC2348946355FD
Publication date: 12 July, 2012
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PDF Link: FAIRCHILD FAN1577A Dual Synchronous DC/DC Controller handbook PDF