參數(shù)資料
型號(hào): C2012X5R1A335M
廠商: Texas Instruments, Inc.
英文描述: UNREGULATED 60-mA CHARGE PUMP VOLTAGE INVERTER
中文描述: 未穩(wěn)壓60 mA充電泵電壓型逆變器
文件頁(yè)數(shù): 14/23頁(yè)
文件大?。?/td> 430K
代理商: C2012X5R1A335M
TPS60400, TPS60401, TPS60402, TPS60403
UNREGULATED 60-mA CHARGE PUMP VOLTAGE INVERTER
SLVS324
JULY 2001
14
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
RC-post filter
TPS60400
OUT
C1+
IN
C1
GND
1
2
3
5
4
C(fly)
1
μ
F
CO
1
μ
F
CP
CI
1
μ
F
VO (
VI)
GND
VI
GND
RP
Figure 24. TPS60400 and TPS60401 With RC-Post Filter
An output filter can easily be formed with a resistor (R
P
) and a capacitor (C
P
). Cutoff frequency is given by:
1
2 R
P
C
P
c
(1)
and ratio V
O
/V
OUT
is:
V
O
V
OUT
1
1
2
R
P
C
P
2
(2)
with R
P
= 50
, C
P
= 0.1
μ
F and f = 250 kHz:
V
O
V
OUT
0.125
The formula refers only to the relation between output and input of the ac ripple voltages of the filter.
LC-post filter
TPS60400
OUT
C1+
IN
C1
GND
1
2
3
5
4
C(fly)
1
μ
F
CO
1
μ
F
CP
CI
1
μ
F
VO (
VI)
GND
VI
GND
LP
VOUT
Figure 25. LC-Post Filter
Figure 25 shows a configuration with a LC-post filter to further reduce output ripple and noise.
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