參數(shù)資料
型號： PTB78560CAZ
廠商： TEXAS INSTRUMENTS INC
元件分類： 電源模塊
英文描述： 1-OUTPUT 30 W DC-DC REG PWR SUPPLY MODULE
封裝： ROHS COMPLIANT, DIP11
文件頁數(shù)： 6/27頁
文件大小： 643K
代理商： PTB78560CAZ
www.ti.com
R
SET + RO
V
R
V
O * VMIN
* RP
(1)
1
3
4
5
9
10
8
7
6
2
CI
100
F
Track
Sense
+VI
VI
NEN
PTB78560A
PEN
+Sense
VO Bus
VO Adjust
VO COM
RSET
VI
+VI
CO
220
F
SLTS249 – JUNE 2005
Table 1. Standard Values of RSET for Common Output Voltages
PTB78560A
PTB78560B
PTB78560C
VO (Required)
RSET
VO (Actual)
RSET
VO (Actual)
RSET
VO (Actual)
1.8 V
–
Open
1.802 V
–
2 V
–
200 k
2.004 V
–
2.5 V
–
40.2 k
2.498 V
–
3.3 V
–
5.36 k
3.300 V
–
3.6 V
Open
3.611 V
309
3.600 V
–
5 V
14.3 k
5.005 V
–
9 V
–
Open
9.015 V
10 V
–
73.2 k
9.993 V
12 V
–
9.09 k
12 V
13.2 V
–
0
13.23 V
For other output voltages, the value of the required adjust resistor may be calculated using Equation 1.
Table 2 gives the output voltage adjust range and the required equation constants for the converter model
selected. To calculate the required value of RSET, simply locate the applicable constants and substitute these
into the formula along with the desired output voltage.
Table 2. Adjust Ranges and Equation Constants
Model #
PTB78560A
PTB78560B
PTB78560C
VR
1.24 V
2.5 V
RO
49.91 k
36.55 k
37.27 k
RP
30.1 k
24.9 k
22.1 k
VMIN
3.61 V
1.8 V
9.02 V
VMAX
5.5 V
3.6 V
13.2 V
Figure 22. Output Voltage Adjustment
14
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