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參數資料
型號: TPS40054QPWPRQ1
廠商: TEXAS INSTRUMENTS INC
元件分類: 穩壓器
英文描述: SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PDSO16
封裝: PLASTIC, HTSSOP-16
文件頁數: 19/28頁
文件大小: 571K
代理商: TPS40054QPWPRQ1
www.ti.com
G +
1
A
MOD(f)
+
1
0.304
+ 3.29
(75)
f
Z2 +
1
2p
R1
C3
N C3 +
1
2p
100 kW
4.93 kHz
+ 323 pF, choose 330 pF
(76)
f
P2 +
1
2p
R3
C3
N R3 +
1
2p
330 pF
73.3 kHz
+ 6.55 kW, choose 6.49 kW
(77)
f
C +
1
2p
R1
C2
G
N C2 +
1
2p
100 kW
3.29
20 kHz
+ 24.2 pF, choose 22 pF
(78)
f
P1 +
1
2p
R2
C2
N R2 +
1
2p
22 pF
73.3 kHz
+ 98.2 kW, choose 97.6 kW
(79)
f
Z1 +
1
2p
R2
C1
N C1 +
1
2p
97.6 kW
4.93 kHz
+ 331 pF, choose 330 pF
(80)
R
BIAS +
0.7 V
R1
V
O * 0.7 V
+
0.7 V
100kW
3.3 V * 0.7 V
+ 26.9 kW, choose 26.7 kW
(81)
CALCULATING THE BOOST AND BP10V BYPASS CAPACITANCE
C
BOOST +
Qg
DV
+
18 nC
0.5 V
+ 36 nF
(82)
C
BP(10 V) +
Q
gHS ) QgSR
DV
+
2
Qg
DV
+
36 nC
0.5 V
+ 72 nF
(83)
TPS40054-Q1, TPS40055-Q1, TPS40057-Q1
SLAS482A – AUGUST 2005 – REVISED NOVEMBER 2005
DESIGN EXAMPLE (continued)
Choose R1 = 100 k
The poles and zeros for a type III network are described in Equation 25 and Equation 26.
Calculate the value of RBIAS from Equation 81 with R1 = 100 k.
The size of the bypass capacitor depends on the total gate charge of the MOSFET being used and the amount
of droop allowed on the bypass cap. The BOOST capacitance for the Si7860DP, allowing for a 0.5-V droop on
the BOOST pin from Equation 29 is:
and the BP10V capacitance from Equation 32 is
For this application, a 0.1-F capacitor is used for the BOOST bypass capacitor and a 1-F capacitor is used for
the BP10V bypass.
26
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相關代理商/技術參數
參數描述
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TPS40055EVM-002 功能描述:電源管理IC開發工具 Wide Input Range Converter RoHS:否 制造商:Maxim Integrated 產品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V
TPS40055MPWPREP 功能描述:DC/DC 開關控制器 Mil Enh Wide Input 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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