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| 型号： | PTH12030WAZT |
| 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 PACKAGE-13 |
| 文件页数： | 9/26页 |
| 文件大小： | 794K |
| 代理商： | PTH12030WAZT |
PREBIAS STARTUP CAPABILITY
VI (5 V/div)
t Time 5 ms/div
Startup
Period
UVLO Threshold
VO (1 V/div)
www.ti.com .................................................................................................................................................... SLTS211H – MAY 2003 – REVISED DECEMBER 2008
Notes on Use of Auto-Track
TM
1. The Track pin voltage must be allowed to rise above the module set-point voltage before the module
regulates at its adjusted set-point voltage.
2. The Auto-Track function tracks almost any voltage ramp during power up, and is compatible with ramp
speeds of up to 1 V/ms.
3. The absolute maximum voltage that may be applied to the Track pin is the input voltage VI.
4. The module cannot follow a voltage at its track control input until it has completed its soft-start initialization.
This takes about 40 ms from the time that a valid voltage has been applied to its input. During this period, it
is recommended that the Track pin be held at ground potential.
5. The Auto-Track function is disabled by connecting the Track pin to the input voltage (VI). When Auto-Track is
disabled, the output voltage rises at a quicker and more linear rate after input power has been applied.
The capability to start up into an output prebias condition is now available to all the 12-V input, PTH series of
power modules. (Note that this is a feature enhancement for the many of the W-suffix products).[1]
A prebias startup condition occurs as a result of an external voltage being present at the output of a power
module prior to its output becoming active. This often occurs in complex digital systems when current from
another power source is backfed through a dual-supply logic component, such as an FPGA or ASIC. Another
path might be via clamp diodes, sometimes used as part of a dual-supply power-up sequencing arrangement. A
prebias can cause problems with power modules that incorporate synchronous rectifiers. This is because under
most operating conditions, such modules can sink as well as source output current. The 12-V input PTH modules
all incorporate synchronous rectifiers, but will not sink current during startup, or whenever the Inhibit pin is held
low. Startup includes an initial delay (approximately 8 ms–15 ms), followed by the rise of the output voltage
under the control of the module’s internal soft-start mechanism; see Figure 18.
Figure 18. Startup Waveforms
Copyright 2003–2008, Texas Instruments Incorporated
17
Product Folder Link(s): PTH12030W/L
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PDF描述 |
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| PTH12030WAZ | 1-OUTPUT DC-DC REG PWR SUPPLY MODULE |
| PTH12030LAH | 1-OUTPUT DC-DC REG PWR SUPPLY MODULE |
| PTH12030WAS | 1-OUTPUT DC-DC REG PWR SUPPLY MODULE |
| PTH12030LAST | 1-OUTPUT DC-DC REG PWR SUPPLY MODULE |
| PTH12030LAZT | 1-OUTPUT DC-DC REG PWR SUPPLY MODULE |
相关代理商/技术参数 |
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| PTH12040 | 制造商:EMERSON-NETWORKPOWER 制造商全称:Emerson Network Power 功能描述:DC-DC CONVERTERS |
| PTH12040W | 制造商:TI 制造商全称:Texas Instruments 功能描述:50-A, 8-V to 14-V INPUT, NON-ISOLATED WIDE-OUTPUT ADJUST POWER MODULE |
| PTH12040WAD | 功能描述:DC/DC转换器 50-A 8-14V-Inp Wide Out 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: |
| PTH12040WADT | 制造商:ARTESYN 制造商全称:Artesyn Technologies 功能描述:DC-DC CONVERTERS POLA Non-isolated |
| PTH12040WAH | 功能描述:DC/DC转换器 50-A 8-14V-Inp Wide Out 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: |
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