utc3845d chip Chinese information:
The power supply block utc3845d parameters are lead-free process, more environmentally friendly, so utc3845d and uc3845an can be interchangeable.
Utc3845d pin function detailed explanation:
1 pin error amplifier output end, control error amplifier gain.
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Pin 2: Error amplifier inverting input, its role is to sample feedback input.
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3 Pin current detection input, when the current is detected, the chip will automatically turn off, protect the switch tube and peripheral circuit.
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4 pin internal oscillator timing end, through this pin external capacitor resistor.
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5 Ground pins.
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6 pin drives the signal output end of the external switch tube, which is used to control the on and off of the external switch tube.
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7 Pin power supply.
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8 pin internal voltage reference output, can provide a reference voltage to the external circuit.