Pin function:
The regulation of pin FB, Cv and Cc is based on the implementation of voltage sampling of this pin.
2 pin CS, Cs is the current detection pin of the Ic, according to the Cs pin voltage, the internal circuit will turn off the power transistor.
3-pin VCc, the Vcc pin provides power to the integrated circuit, in order to get the correct operation of the Ic, a low Esr capacitor should be placed on the Vcc pin as much as possible.
Pin 4 E, the emitter E of the built-in triode.
5.6 Pin C, collector C of the built-in power triode.
7 pin Gnd, the Gnd pin is the Ic ground, when the power transistor is off, the fast reverse fast sinking current will flow from this pin to the Bjt gate, pay attention to the Pcb layout.
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pin1:fb feedback 2: cs sheet Option 3: vcc power supply 4: emitter E 5 6: collector c 7: GND ground