Fujitsu MB3878 manual PIN Description, Pin No Symbol Descriptions

MB3878

■PIN DESCRIPTION

Pin No.	Symbol	I/O	Descriptions
1	−INC2	I	Current detection amplifier (Current Amp. 2) input pin.
2	OUTC2	O	Current detection amplifier (Current Amp. 2) output pin.
3	+INE2	I	Error amplifier (Error Amp. 2) non-inverted input pin.
4	−INE2	I	Error amplifier (Error Amp. 2) inverted input pin.
5	FB2	O	Error amplifier (Error Amp. 2) output pin.
6	VREF	O	Reference voltage output pin.
7	FB1	O	Error amplifier (Error Amp. 1) output pin.
8	−INE1	I	Error amplifier (Error Amp. 1) inverted input pin
9	+INE1	I	Error amplifier (Error Amp. 3) non-inverted input pin.
10	OUTC1	O	Current detection amplifier (Current Amp. 1) output pin.
			With IC in standby mode, this pin is left open to prevent loss of current
11	OUTD	O	through output voltage setting resistance. Set CTL pin to “H” level and
			OUTD pin to “L” level.
12	−INC1	I	Current detector amplifier (Current Amp. 1) input pin.
13	+INC1	I	Current detector amplifier (Current Amp. 1) input pin.
14	CTL	I	Power supply control pin.
			Setting the CTL pin low places the IC in the standby mode.
15	FB3	O	Error amplifier (Error Amp. 3) output pin.
16	−INE3	I	Error amplifier (Error Amp. 3) inverted input pin.
17	RT		Triangular-wave oscillation frequency setting resistor connection pin.
18	VCC		Power supply pin for reference power supply and control circuit.
19	VH	O	Power supply pin for FET drive circuit (VH = Vcc − 5 V).
20	OUT	O	High-side FET gate drive pin.
21	VCC (O)		Output circuit power supply pin.
22	CS		Soft-start capacitor connection pin.
23	GND		Ground pin.
24	+INC2	I	Current detection amplifier (Current Amp. 2) input pin.

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