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參數資料
型號: TPS5102IDBR
英文描述: Analog IC
中文描述: 模擬IC
文件頁數: 16/31頁
文件大小: 1083K
代理商: TPS5102IDBR
TPS5102
DUAL, HIGH-EFFICIENCY CONTROLLER FOR NOTEBOOK PC POWER
SLVS239 - SEPTEMBER 1999
16
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
output capacitor RMS current
Assuming the inductor ripple current totally goes through the output capacitor to ground, the RMS current in the
output capacitor can be calculated as:
Iorms
I
12
Where Io(rms)is the maximum RMS current in the output capacitor (A);
Iis the peak-to-peak inductor ripple
current (A).
Example:
I = 2 A, so Io(rms) = 0.58 A
input capacitor RMS current
Assuming the input ripple current totally goes into the input capacitor to the power ground, the RMS current in
the input capacitor can be calculated as:
Iirms
Io
2
D
(1–D)
1
Iripple
2
Where Ii(rms) is the input RMS current in the input capacitor (A); Iois the output current (A); Iripple is the
peak-to-peak output inductor ripple current; Dis the duty cycle. From the equation, it can be seen that the
highest input RMS current usually occurs at the lowest input voltage, so it is the worst case design for input
capacitor ripple current.
Example: Io = 5 A; D = 0.36; Iripple = 2 A,
Then, Ii(rms) = 2.42 A
soft-start
The soft-start timing can be adjusted by selecting the soft-start capacitor value. The equation is
C
soft
2
T
soft
Where C
soft
is the soft-start capacitance (
μ
F) (C9 or C13 in EVM design); T
soft
is the start-up time (S).
Example: Tsoft = 5 mS, so Csoft = 0.01
μ
F.
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TPS5102IDBTR 功能描述:DC/DC 開關控制器 Dual Output Synch Buck Cntrlr RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK
TPS5102IDBTRG4 功能描述:DC/DC 開關控制器 Dual Output Synch Buck Cntrlr RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK
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