Epson S1F70000 EXAMPLE OF REFERENCE EXTERNAL CONNECTION

S1F76620 Series

EXAMPLE OF REFERENCE EXTERNAL CONNECTION

2 Times Step-up

2 times step-up output of VO (2 × VDD) is obtained from the circuit shown in Figure 1.

	1	POFF	VO	8		2 •VI
	2	GND	CAP1+	7	+
VI	3	OSC1	CAP1–	6	–	+
						–
	4	OSC2	VDD	5

Figure 1 2 Time Step-up Operation

Parallel Connection

It is possible to make the output impedance (RO) small when several pieces of the circuit shown in Figure 1 are connected. Parallel connection of n circuits reduces RO to 1/n approximately. One piece of the smoothing capacitor C2 can be commonly used.

					1	POFF	VO	8
					2	GND	CAP1+	7	+
1	POFF	VO	8
									_
					3	OSC1	CAP1–	6
2	GND	CAP1+	7	+
					4	OSC2	VDD	5
VI				_ +
	OSC1	CAP1–	6
3				_
4	OSC2	VDD	5

Figure 2 Parallel Connection

S1F76620 Series

S1F70000 Series Technical Manual

EPSON 1–21