參數(shù)資料
型號: TPS40071PWPR
廠商: TEXAS INSTRUMENTS INC
元件分類: 穩(wěn)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(shù): 28/28頁
文件大小: 655K
代理商: TPS40071PWPR
R
KFF + 0.131
R
T
V
UVLO(on) * 1.61
10*3
V
UVLO(on)
2
) 1.886
V
UVLO * 1.363 * 0.02
R
T * 4.87
10*5
R2
T
RKFF Feedforward Impedance k
100
150
250
300
350
450
200
400
4
2
8
6
10
14
12
18
16
20
V
U
V
L
O
Programmable
UVLO
Threshold
V
UVLOVON
fSW = 300 kHz
UVLOVOFF
VDD Input Voltage V
f O
S
C
Frequency
kHz
490
480
485
505
495
500
520
510
515
525
27
5
9
11
15
17 19
23 25
13
21
29
www.ti.com .................................................................................................................................................. SLUS582J – DECEMBER 2003 – REVISED APRIL 2009
(4)
where
R
T and RKFF are in k
V
UVLO(on) is in V
This yields typical numbers for the programmed startup voltage. The minimum and maximum values may vary up
15% from this number. Figure 5 through Figure 6 show the typical relationship of VUVLO(on), VUVLO(off) and RKFF at
three common frequencies.
FREQUENCY
UNDERVOLTAGE LOCKOUT THRESHOLD
vs
INPUT VOLTAGE
FEEDFORWARD IMPEDANCE
Figure 4.
Figure 5.
Copyright 2003–2009, Texas Instruments Incorporated
9
Product Folder Link(s): TPS40070 TPS40071
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