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参数资料
| 型号： | PTN78060HAH |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 电源模块 |
| 英文描述： | 1-OUTPUT 45 W DC-DC REG PWR SUPPLY MODULE |
| 封装： | DIP-7 |
| 文件页数： | 10/28页 |
| 文件大小： | 1948K |
| 代理商： | PTN78060HAH |
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Output On/Off Inhibit
Inhibit
GND
PTN78060
1
4
6
2
3
Adjust
GND GND
VO
VI
V = 12 V
I
V = 5 V
O
Inhibit
7
5
Sense
+
L
O
A
D
CI
2.2 F
m
Ceramic
RSET
21 kW
0.05 W
1%
C
O
100 F
m
Q1
BSS138
PTN78060W, PTN78060H
SLTS229A – NOVEMBER 2004 – REVISED APRIL 2005
To use the output voltage sense feature, simply connect the VO Sense input (pin 5) to VO, close to the device
that draws the most supply current. If an external voltage sense is not desired, the VO Sense input may be left
open circuit. An internal resistor (15
or less), connected between this input and V
O, ensures that the output
remains in regulation.
With VO Sense connected, the difference between the voltage measure directly between the VO and GND, and
that measured from VO Sense to GND, represents the amount of IR-voltage drop being compensated by the
regulator. This should be limited to a maximum of 0.3 V.
Note: The external voltage sense is not designed to compensate for the forward drop of nonlinear or
frequency-dependent components that may be placed in series with the regulator's output. Examples include
OR-ing diodes, filter inductors, ferrite beads, and fuses. When these components are enclosed by the external
sense connection, they are effectively placed inside the regulation control loop. This can adversely affect the
stability of the module.
The inhibit feature can be used wherever there is a requirement for the output voltage to be turned off. The
power module functions normally when the Inhibit control (pin 3) is left open-circuit, providing a regulated output
whenever a valid source voltage is connected to VI with respect to GND. Figure 30 shows the the circuit used to
demonstrate the inhibit function. Note the discrete transistor (Q1). Turning Q1 on applies a low voltage to the
Inhibit control pin and turns the module off. The output voltage decays as the load circuit discharges the
capacitance. The current drawn at the input is reduced to typically 17 mA. If Q1 is then turned off, the module
executes a soft-start power up. A regulated output voltage is produced within 20 ms. Figure 31 shows the typical
rise in the output voltage, following the turn off of Q1. The turn off of Q1 corresponds to the fall in the waveform,
Q1 Vgs. The waveforms were measured with a 2.8-A resistive load.
Figure 30. On/Off Inhibit Control Circuit
18
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相关代理商/技术参数 |
参数描述 |
|---|---|
| PTN78060HAH | 制造商:Texas Instruments 功能描述:ISR HORIZONTAL 3A ADJ O/P 78060 |
| PTN78060HAH | 制造商:Texas Instruments 功能描述:DC-DC CONV LINEAR REG 1 O/P 45W 3A 制造商:Texas Instruments 功能描述:DC-DC CONV, LINEAR REG, 1 O/P, 45W, 3A |
| PTN78060HAS | 功能描述:DC/DC转换器 3A Wide-In Wide Output Adj 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: |
| PTN78060HAST | 功能描述:DC/DC转换器 3A Wide-In Wide Output Adj 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: |
| PTN78060HAZ | 功能描述:DC/DC转换器 3A Wide-In Wide Output Adj 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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