Epson S1F70000 EPSON, S1F76610 Series, Voltage Multiplier, Double voltage potential levels, Tripled voltage potential levels

S1F76610 Series

FUNCTIONAL DESCRIPTIONS

CR Oscillator

The on-chip CR oscillator network frequency is determined by the external resistor, ROSC, connected between OSC1 and OSC2. This oscillator can be disabled in favor of an external clock by leaving OSC2 open and applying an external clock signal to OSC1.

Voltage Multiplier

The voltage multiplier uses the clock signal from the oscillator to double or triple the input voltage. This requires three external capacitors–two charge-pump capacitors between CAP1+ and CAP1– and CAP2+ and CAP2–, respectively, and a smoothing capacitor between VI and VO.

Oscillator External clock

OSC1		OSC1
	ROSC	External clock
		signal
OSC2		OSC2

Reference Volatge Generator and Voltage Regulator

The reference voltage generator supplies a reference voltage to the voltage regulator to control the output. This voltage can be switched ON and OFF.

VDD
POFF	Control signal
RV	RRV = 100 kΩ to 1 MΩ
VREG

VDD = 0 V

C1

+

1

14

∝

R

10 F

2

13

R1

RV

ROSC

100 kΩ

1 MΩ

to

5 V C2

+

3

12

R2

1 MΩ

10 ∝F

+ C4

4

11

10

∝F

5

10

6

9

VO = –15 V

VREG = –8 V

VI = –5 V

7

8

+

C3

10 ∝F

Double voltage potential levels

VCC

(+5V)

VDD = 0 V

GND

VI = –5 V

(–5V)

VCAP2 – = 2VI = –10 V

Tripled voltage potential levels

VDD = 0 V

VI = –5 V

S1F76610 Series

VO = 3VI = –15 V

S1F70000 Series Technical Manual

EPSON 2–11