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参数资料
| 型号： | PTH04T261WAZ |
| 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： | ROHS COMPLIANT, PLASTIC, DIP-10 |
| 文件页数： | 17/36页 |
| 文件大小： | 1162K |
| 代理商： | PTH04T261WAZ |
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Output On/Off Inhibit
GND
2
3
+
GND
Inhibit/
UVLO
1 = Inhibit
Q1
BSS138
10
VI
CI
UDG06045
PTH04T260/261W
T Time 10 ms/div
VO
(1 V/div)
II
(1 A/div)
VINH
(2 V/div)
Overcurrent Protection
SLTS273E – SEPTEMBER 2006 – REVISED JULY 2009.................................................................................................................................................. www.ti.com
For applications requiring output voltage on/off control, the PTH04T260/261W incorporates an output Inhibit
control pin. The inhibit feature can be used wherever there is a requirement for the output voltage from the
regulator to be turned off.
The power modules function normally when the Inhibit pin is left open-circuit, providing a regulated output
whenever a valid source voltage is connected to VI with respect to GND.
Figure 21 shows the typical application of the inhibit function. Note the discrete transistor (Q1). The Inhibit input
has its own internal pull-up. An external pull-up should never be connected to the inhibit pin. The input is not
compatible with TTL logic devices. An open-collector (or open-drain) discrete transistor is recommended for
control.
Figure 21. On/Off Inhibit Control Circuit
Figure 22. Power-Up Response from Inhibit Control
Turning Q1 on applies a low voltage to the Inhibit control pin and disables the output of the module. If Q1 is then
turned off, the module executes a soft-start power-up sequence. A regulated output voltage is produced within 40
ms. Figure 22 shows the typical rise in both the output voltage and input current, following the turn-off of Q1. The
turn off of Q1 corresponds to the rise in the waveform, VINH. The waveforms were measured with a 3-A constant
current load.
For protection against load faults, all modules incorporate output overcurrent protection. Applying a load that
exceeds the regulator's overcurrent threshold causes the regulated output to shut down. Following shutdown, a
module periodically attempts to recover by initiating a soft-start power-up. This is described as a hiccup mode of
operation, whereby the module continues in a cycle of successive shutdown and power up until the load fault is
removed. During this period, the average current flowing into the fault is significantly reduced. Once the fault is
removed, the module automatically recovers and returns to normal operation.
24
Copyright 2006–2009, Texas Instruments Incorporated
Product Folder Link(s): PTH04T260W PTH04T261W
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相关代理商/技术参数 |
参数描述 |
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| PTH04T261WAZT | 功能描述:DC/DC转换器 3A 2.2V-5.5Vin Adj Pwr Module RoHS:否 制造商:Murata 产品: 输出功率: 输入电压范围:3.6 V to 5.5 V 输入电压（标称）: 输出端数量:1 输出电压（通道 1）:3.3 V 输出电流（通道 1）:600 mA 输出电压（通道 2）: 输出电流（通道 2）: 安装风格:SMD/SMT 封装 / 箱体尺寸: |
| PTH05000 WAZ | 制造商:Texas Instruments 功能描述: |
| PTH05000W | 制造商:未知厂家 制造商全称:未知厂家 功能描述:6 A. 5-V Input Wide-Output Adjust Plug-in Power Module |
| PTH05000WAD | 功能描述:DC/DC转换器 6A 5VInput Wide-Out Adj Plug-in Pwr Mod RoHS:否 制造商:Murata 产品: 输出功率: 输入电压范围:3.6 V to 5.5 V 输入电压（标称）: 输出端数量:1 输出电压（通道 1）:3.3 V 输出电流（通道 1）:600 mA 输出电压（通道 2）: 输出电流（通道 2）: 安装风格:SMD/SMT 封装 / 箱体尺寸: |
| PTH05000WAH | 功能描述:DC/DC转换器 6A 5VInput Wide-Out Adj Plug-in Pwr Mod RoHS:否 制造商:Murata 产品: 输出功率: 输入电压范围:3.6 V to 5.5 V 输入电压（标称）: 输出端数量:1 输出电压（通道 1）:3.3 V 输出电流（通道 1）:600 mA 输出电压（通道 2）: 输出电流（通道 2）: 安装风格:SMD/SMT 封装 / 箱体尺寸: |
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