參數(shù)資料
型號(hào)： T520X477M006SE018
廠商： Texas Instruments, Inc.
英文描述： 60-A, 3.3/5-V INPUT, NONISOLATED WIDE-OUTPUT ADJUST POWER MODULE
中文描述： 60甲，3.3/5-V輸入，非隔離寬輸出調(diào)節(jié)電源模塊
文件頁(yè)數(shù)： 11/24頁(yè)
文件大?。?/td> 947K
代理商： T520X477M006SE018
www.ti.com
ADJUSTING THE OUTPUT VOLTAGE OF THE PTH04040W WIDE-OUTPUT ADJUST POWER
MODULE
The
V
O
Adjust
control (pin 17) sets the output voltage of the PTH04040W to a value higher than 0.8 V. The
adjustment range is from 0.8 V to 2.5 V. For an output voltage other than 0.8 V a single external resistor, R
SET
1,
must be connected directly between the
V
Adjust
(pin 17) and the output
GND
(pin 16)
(2)
.
Table 2
gives the
preferred value of the external resistor for a number of standard voltages, along with the actual output voltage
that this resistance value provides.
Rset
10 k
0.8 V
Vout
0.8 V
2.49 k
(1)
R
SET
1
%
0
.
0
5
W
PTH04040W
12
15
9
10
13
GND
16
11
14
18
V
O
V
O
C
O
+Sense
Sense
T
r
a
c
k
Adjust
17
G
N
D
G
N
D
PTH04040W
SLTS238A–SEPTEMBER 2005–REVISED FEBRUARY 2006
For other output voltages, the value of the required resistor is calculated using the following formula, or by
selecting from the range of values given in
Table 3
.
Figure 9
shows the placement of the required resistor.
Table 2. Preferred Values of R
set
for Standard Output Voltages
V
OUT
(Standard)
(1)
R
SET
(Preferred Value)
2.5 V
2 V
1.8 V
1.5 V
1.2 V
1 V
0.8 V
V
OUT
(Actual)
2.502 V
2.010 V
1.803 V
1.504 V
1.202 V
1.005 V
0.8 V
2.21
4.12
5.49
8.87
17.4
36.5
Open
(1)
The nominal input voltage must be at least 2
×
V
. Output voltage regulation is guaranteed with an input voltage within
±
10% from
nominal 3.3 V or 5 V. For example, for V
I
= 5 V and V
O
= 2.5 V, the input can vary between 4.5 V and 5.5 V.
Figure 9. V
O
Adjust Resistor Placement
11
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