参数资料
型号: PTB48520WAS
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: 5/18页
文件大小: 427K
代理商: PTB48520WAS
www.ti.com
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6
4
2
15
6
4
2
1
2
3
4
8
10
9
7
6
5
VOAdjust
VOBus
VOSeq
Track
+Sense
VOCOM
Sense
+VI
VI
VOEnable
PTB48520W
+VI
VI
R1
887 W
U1
U2
3
C1
100 mF
R2
2.21 kW
C3
100 mF
C4
100 mF
C2
100 mF
3
U3
VI
PTH03050W V
O
Track
Inhibit GND Adjust
VI
PTH03050W V
O
Track
Inhibit GND Adjust
R3
5.49 kW
VOSEQ (3.3 V)
V(POL)1 (2.5 V)
V(POL)2 (1.8 V)
Stand-Alone Operation
PTB48520W
SLTS233A–NOVEMBER 2004–REVISED APRIL 2005
Figure 10. Power-Up Sequencing With Non-Isolated POL Modules
The wide output voltage adjust range makes the PTB48520W an attractive product as a stand-alone dc/dc
converter. In these applications, it is not required to power up or sequence with any non-isolated POL modules.
The output voltage can be adjusted to any value over the range, 1.8 V to 3.6 V, and the Auto-Track features
simply disregarded.
Figure 11 shows the recommended configuration when the module is used as a stand-alone converter. In this
case, a sequenced output voltage is not required, and the main output (VO Bus) can be used to supply the load.
Both the Track pin and the VO Seq output are simply left open circuit. The (+)Sense pin is connected to the VO
Bus output for improved load regulation.
When the converter is operated in this mode, the output from VO Bus rises promptly on power up. The converter
also exhibits slightly less power dissipation along with a corresponding improvement in operating efficiency.
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