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| 型号： | PTB48560BAH |
| 厂商： | Texas Instruments |
| 文件页数： | 16/29页 |
| 文件大小： | 0K |
| 描述： | CONV DC/DC 3.3V 8A HZ T/H 11DIP |
| 标准包装： | 12 |
| 系列： | PTB48560 |
| 类型： | 隔离 |
| 输出数： | 1 |
| 电压 - 输入（最小）： | 36V |
| 电压 - 输入（最大）： | 75V |
| Voltage - Output 1： | 1.8 ~ 3.6 V |
| 电流 - 输出（最大）： | 8A |
| 电源（瓦） - 制造商系列： | 30W |
| 电压 - 隔离： | 1.5kV（1500V） |
| 安装类型： | 通孔 |
| 封装/外壳： | 11-DIP 模块 |
| 尺寸/尺寸： | 2.05" L x 1.05" W x 0.39" H（51.9mm x 26.5mm x 10.0mm） |
| 包装： | 托盘 |
| 工作温度： | -40°C ~ 85°C |
| 效率： | 82% |
| 电源（瓦特）- 最大： | 30W |
| 产品目录页面： | 2703 (CN2011-ZH PDF) |
| 其它名称： | 296-20341 PTB48560BAH-ND |
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PTB48560A, PTB48560B
PTB48560C
SLTS236A – MARCH 2005 – REVISED OCTOBER 2005
www.ti.com
Sequenced Power Up with POL Modules
Overview
The main output from the PTB48560x converters is V O Bus. In power sequencing applications, V O Bus is used as
the intermediate supply voltage for powering one or more downstream nonisolated power modules that
incorporate Auto-Track? 1 . The output voltage from Auto-Track compliant modules can be sequenced using a
control input called Track. The Track input directly controls the output of a module from zero to its set-point
voltage. The control is on a volt-for-volt basis, and allows multiple modules to follow a common analog signal
during power-up events.
The Track signal attempts to start rising when the nonisolated modules are first powered from V O Bus. However,
for proper sequencing, the voltage must be held at ground potential for at least 20 ms (40 ms for 12-V input
modules) after V O Bus is in regulation. This is necessary to allow time for the nonisolated modules to complete
their power-up initialization. The Track pin of each PTB48560x converter has an internal open-drain transistor
that automatically holds the Track signal at ground potential to comply with this requirement.
The PTB48560B (1.8 V to 3.6 V) has a V O Seq output. V O Seq is internally derived from V O Bus and regulated to
the same set-point voltage. It has the added feature of being controlled by the Track input. During power up, this
output can sequence with the outputs of the nonisolated modules powered from V O Bus.
Auto-Track Features
Figure 18 shows a block diagram of the converter Auto-Track features. The components shaded are only present
in the PTB48560B. During power up, V O Bus rises promptly, after the converter is connected to a valid input
source and its output is enabled. V O Seq (PTB48560B) is the Auto-Track compatible output that is controlled by
the voltage presented at the Track terminal. The control is active from 0 V up to a voltage just below the V O Bus
output. Between these limits, the voltage at V O Seq follows that at the Track terminal. Once the Track voltage is
at the V O Bus voltage, raising it higher has no further effect. The voltage at V O Seq cannot go higher than V O Bus,
and if connected to +Sense, it regulates at the set-point voltage. 2
The Track input to the PTB48560x series of converters include a pullup resistor (R TRK ) to V O Bus, and a 1-μF
capacitor (C TRK ) to -Sense. These components are standard on all Auto-Track compatible modules. They form
an R–C time constant that cause the Track voltage to rise when the internal MOSFET is turned off. The
unity-gain relationship between V O Seq and the Track input is the same as all other Auto-Track compliant
outputs. 3 The V O Seq output also follows a compatible external ramp waveform applied to the Track pin. 4, 5 The
internal MOSFET is designed to hold the Track voltage at ground potential for the required period after the
V O Bus output is in regulation.
16
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相关代理商/技术参数 |
参数描述 |
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| PTB48560BAS | 功能描述:DC/DC转换器 30-W 1.8V to 3.6V Adj DC/DC Converter 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: |
| PTB48560BAZ | 功能描述:DC/DC转换器 30-W 1.8V to 3.6V Adj DC/DC Converter 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: |
| PTB48560C | 制造商:TI 制造商全称:Texas Instruments 功能描述:30-W, 48-V INPUT DC/DC CONVERTERS WITH AUTO-TRACK TM SEQUENCING |
| PTB48560CAH | 功能描述:DC/DC转换器 30-W 9V to 13.2V Adj DC/DC Converter 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: |
| PTB48560CAS | 功能描述:DC/DC转换器 30-W 9V to 13.2V Adj DC/DC Converter 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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