參數(shù)資料
型號(hào)： TPS60402DBVRG4
廠商： TEXAS INSTRUMENTS INC
元件分類： 穩(wěn)壓器
英文描述： SWITCHED CAPACITOR CONVERTER, 70 kHz SWITCHING FREQ-MAX, PDSO5
封裝： GREEN, PLASTIC, SOT-23, 5 PIN
文件頁數(shù)： 6/28頁
文件大?。?/td> 787K
代理商： TPS60402DBVRG4
TPS60400, TPS60401, TPS60402, TPS60403
UNREGULATED 60mA CHARGE PUMP VOLTAGE INVERTER
SLVS324A JULY 2001 REVISED NOVEMBER 2004
14
WWW.TI.COM
APPLICATION INFORMATION
RC-post filter
TPS60400
OUT
C1+
IN
C1
GND
1
2
3
5
4
C(fly)
1
F
CO
1
F
CP
CI
1
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 (RP) and a capacitor (CP). Cutoff frequency is given by:
c +
1
2
pR
PCP
(1)
and ratio VO/VOUT is:
V
O
V
OUT
+
1
) 2pR
PCP
2
(2)
with RP = 50 , CP = 0.1 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
F
CO
1
F
CP
CI
1
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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