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參數資料
型號: TPS40071PWPR
廠商: TEXAS INSTRUMENTS INC
元件分類: 穩壓器
英文描述: 2 A SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PDSO16
封裝: GREEN, PLASTIC, HTSSOP-16
文件頁數: 11/28頁
文件大小: 655K
代理商: TPS40071PWPR
SYNCHRONOUS RECTIFIER CONTROL
VDG03175
VOUT
1.8 V
10 A
1
2
3
4
16
15
14
13
ILIM
VDD
BOOST
HDRV
KFF
RT
LVBP
PG
TPS40070PWP
TPS40071PWP
5
6
7
8
12
11
10
9
SW
DBP
LDRV
PGND
SGND
SS
VFB
COMP
+
C3
22 nF
C5
5.6 nF
12 V
+
PWP
C7
10 pF
Q2
Si7856DP
Q1
Si7840DP
+
C6
4.7 nF
C4 470 pF
C12
22
F
C14
22
F
L1
COEV
DXM13061R6
1.6
H
C13
4.7 nF
C15
47
F
C16
470
F
C17
470
F
C18
0.1
F
C8
0.1
F
C9
1
F
C10
0.1
F
R6
165 k
R2
165 k
C2
0.1
F
R5
10 k
R3
5.49 k
R8
226
VDD
R7 8.66 k
R9
2 k
1.5
www.ti.com .................................................................................................................................................. SLUS582J – DECEMBER 2003 – REVISED APRIL 2009
Depending on which device is used the synchronous rectifier is controlled in slightly different ways. Table 2
describes the differences. For proper operation, the total gate charge of the MOSFET connected to LDRV should
be less than 50 nC.
Table 2. Synchronous Rectifier MOSFET States
SYNCHRONOUS RECTIFIER OPERATION DURING
DEVICE
SOFT-START
NORMAL
FAULT
OVERVOLTAGE
Turns OFF when IZERO detected
Turns Off when IZERO detected or
Turns OFF when IZERO detected or
TPS40070
OFF
or start of next cycle
start of next cycle
Turns OFF only at start of next
Turns OFF only at start of next cycle,
TPS40071
Turns OFF only at start of next cycle
ON
cycle
if duty cycle is > 0
Figure 14. 300 kHz, 12 V to 1.8 V
Copyright 2003–2009, Texas Instruments Incorporated
19
Product Folder Link(s): TPS40070 TPS40071
相關PDF資料
PDF描述
TPS40070PWPR 2 A SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PDSO16
TPS40074RHLT 2 A SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PQCC20
TPS40074RHLRG4 2 A SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PQCC20
TPS40074RHL 2 A SWITCHING CONTROLLER, 550 kHz SWITCHING FREQ-MAX, PQCC20
TPS40075RHLR 2 A SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PQCC20
相關代理商/技術參數
參數描述
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TPS40074RHLR 功能描述:DC/DC 開關控制器 Mid Input Sync Buck w/Vltg Feed-Fwd 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
TPS40074RHLRG4 功能描述:DC/DC 開關控制器 Mid Input Sync Buck w/Vltg Feed-Fwd 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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