TC4626EPA datasheet(6/18 Pages) MICROCHIP

Part #	TC4626EPA

Description	Power CMOS Drivers With Voltage Tripler

PDF	18 Pages

Scroll/Zoom	100%

Manufacturer	MICROCHIP [Microchip Technology]

Direct Link	http://www.microchip.com

Logo

6 / 18 page

TC4626/TC4627

DS21426C-page 6

 2001-2012 Microchip Technology Inc.

3.1

BOOSTER FUNCTION

The voltage booster is an unregulated voltage tripler

circuit. The tripler consists of three sets of internal

switches and three external capacitors. S1a and S1b

charge capacitor C1 to VDD potential. S2a and S2b add

C1 potential to VDD input to charge C2 to 2 x VDD. S3a

and S3b add C1 potential to C2 to charge C3 to 3 x

VDD. The position of the switches is controlled by the

internal 4 phase clock.

FIGURE 3-3:

VOLTAGE BOOSTER

FIGURE 3-4:

POSITION OF SWITCHES

S1a

S1b

GND

S2a

S2b

2 x VDD

3 x VDD, VBOOST

S3b

S3a

(4 to 6V)

VDD

Pin 2

Voltage

Pin 1

Voltage

3 x VDD

2 x VDD

VDD

2 x VDD

VDD

Off

Pin 1 & 2 Waveforms

TC4626EPA Datasheet(PDF) 6 Page - Microchip Technology