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TCM828ECT Datasheet(PDF) 11 Page - Microchip Technology

Part # TCM828ECT
Description  Switched Capacitor Voltage Converters
PDF  26 Pages
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

TCM828ECT Datasheet(HTML) 11 Page - Microchip Technology

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© 2010 Microchip Technology Inc.
DS21488B-page 11
TCM828/TCM829
4.0
DETAILED DESCRIPTION
The TCM828/TCM829 charge pump converters invert
the voltage applied to the VIN pin. Conversion consists
of a two phase operation (Figure 4-1). During the first
phase, switches S2 and S4 are open, while S1 and S3
are closed. During this time, C1 charges to the voltage
on VIN and load current is supplied from C2. During the
second phase, S2 and S4 are closed, and S1 and S3
are open. This action connects C1 across C2, restoring
charge to C2.
FIGURE 4-1:
Ideal Switched Capacitor
Charge Pump.
VOUT = -(VIN)
C1
C2
IN
S1
S3
S4
S2
TCM828/
TCM829



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