参数资料
型号: PTV08T250WAD
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
文件页数: 14/30页
文件大小: 795K
代理商: PTV08T250WAD
FEATURES OF THE PTH/PTV FAMILY OF NONISOLATED POWER MODULES
Soft-Start Power Up
CI
PTV08T250W
6,7
13,14
20,21
4
5
11
VI
15
Track
GND
VI
GND
V (5V/div)
I
I (2 A/div)
I
t-Time=4ms/div
V
(1V/div)
O
www.ti.com .......................................................................................................................................... SLTS260E – OCTOBER 2005 – REVISED NOVEMBER 2008
The Auto-Track feature allows the power-up of multiple PTH/PTV modules to be directly controlled from the
Track pin. However in a stand-alone configuration, or when the Auto-Track feature is not being used, the Track
pin should be directly connected to the input voltage, VI (see Figure 19).
Figure 19. Soft-Start Power-Up Application Circuit
When the Track pin is connected to the input voltage the Auto-Track function is permanently disengaged. This
allows the module to power up entirely under the control of its internal soft-start circuitry. When power up is
under soft-start control, the output voltage rises to the set-point at a monotonic and quicker rate.
From the moment a valid input voltage is applied, the soft-start control introduces a short time delay (typically
8 ms–15 ms) before allowing the output voltage to rise.
Figure 20. Power-Up Waveform
Copyright 2005–2008, Texas Instruments Incorporated
21
Product Folder Link(s): PTV08T250W
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