参数资料
型号: PTH04T231WAST
厂商: TEXAS INSTRUMENTS INC
元件分类: 电源模块
英文描述: 1-OUTPUT DC-DC REG PWR SUPPLY MODULE
封装: DIP-10
文件页数: 3/36页
文件大小: 1160K
代理商: PTH04T231WAST
APPLICATION INFORMATION
ADJUSTING THE OUTPUT VOLTAGE
R
SET + 10 kW
0.69
V
O * 0.69
* 1.43 kW
(1)
UDG06043
RSET
1%
0.05 W
VO
+Sense
Sense
VoAdj
GND
3
4
5
6
7
+Sense
Sense
GND
VO
PTH04T230/231W
www.ti.com ............................................................................................................................................. SLTS271C – SEPTEMBER 2006 – REVISED MARCH 2009
The VO Adjust control (pin 7) sets the output voltage of the PTH04T230/231W. The adjustment range of the
PTH04T230/231W is 0.69V to 3.6V. The adjustment method requires the addition of a single external resistor,
RSET, that must be connected directly between the VO Adjust and the –Sense pins. Table 1 gives the standard
value of the external resistor for a number of standard voltages, along with the actual output voltage that this
resistance value provides.
For other output voltages, the value of the required resistor can either be calculated using the following formula,
or simply selected from the range of values given in Table 2. Figure 9 shows the placement of the required
resistor.
Table 1. Preferred Values of RSET for Standard Output Voltages
VO (Standard) (V)
RSET (Standard Value) (kΩ)
VO (Actual) (V)
3.3 (1)
1.21
3.304
2.5 (1)
2.37
2.506
1.8 (1)
4.75
1.807
1.5 (1)
6.98
1.510
1.2
12.1
1.200
1.0
20.5
1.004
0.7
681
0.700
(1)
The minimum input voltage is 2.2 V or (VO + 0.5) V, whichever is greater.
(1)
RSET: Use a 0.05 W resistor with a tolerance of 1% and temperature stability of 100 ppm/°C (or better). Connect the
resistor directly between pins 7 and 6, as close to the regulator as possible, using dedicated PCB traces.
(2)
Never connect capacitors from VO Adjust to either GND, VO, or +Sense. Any capacitance added to the VO Adjust pin
affects the stability of the regulator.
Figure 9. VO Adjust Resistor Placement
Copyright 2006–2009, Texas Instruments Incorporated
11
Product Folder Link(s): PTH04T230W PTH04T231W
相关PDF资料
PDF描述
PTH04T230WAST 1-OUTPUT DC-DC REG PWR SUPPLY MODULE
PTH04T231WAD 1-OUTPUT DC-DC REG PWR SUPPLY MODULE
PTH04T230WAZT 1-OUTPUT DC-DC REG PWR SUPPLY MODULE
PTH04T231WAZT 1-OUTPUT DC-DC REG PWR SUPPLY MODULE
PTH04T230WAD 1-OUTPUT DC-DC REG PWR SUPPLY MODULE
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