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参数资料
| 型号： | TC1219ECHTR |
| 元件分类： | 稳压器 |
| 英文描述： | SWITCHED CAPACITOR CONVERTER, 20 kHz SWITCHING FREQ-MAX, PDSO6 |
| 封装： | EIAJ, SC-74, SOT-23A, 6 PIN |
| 文件页数： | 11/16页 |
| 文件大小： | 482K |
| 代理商： | TC1219ECHTR |
TC1219/TC1220
DS21366B-page 4
2002 Microchip Technology Inc.
3.0
DETAILED DESCRIPTION
The TC1219/TC1220 charge pump converters invert
the voltage applied to the VIN pin. Conversion consists
of a two-phase operation (Figure 3-1). During the first
phase, switches S2 and S4 are opened and 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 opened. This action connects C1 across C2,
restoring charge to C2.
FIGURE 3-1:
IDEAL SWITCHED
CAPACITOR CHARGE
PUMP
VOUT = – (VIN)
C1
C2
TC1219/1220
Phase 1
VIN
S1
S3
S4
S2
OSC
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