- 您现在的位置：买卖IC网 > PDF目录69252 > PTH04T240FAD (TEXAS INSTRUMENTS INC) 1-OUTPUT DC-DC REG PWR SUPPLY MODULE PDF资料下载
参数资料
| 型号： | PTH04T240FAD |
| 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： | DIP-11 |
| 文件页数： | 11/35页 |
| 文件大小： | 3835K |
| 代理商： | PTH04T240FAD |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页当前第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页
UNDERVOLTAGE LOCKOUT (UVLO)
R
UVLO +
68.54 * VTHD
V
THD * 2.07
kW
(4)
V
I
Inhibit/
UVLO Prog
GND
PTH04T240F
3
2
R
UVLO
C
I
11
4
+
GND
UDG-08161
V
I
www.ti.com ............................................................................................................................................... SLTS293A – DECEMBER 2008 – REVISED MARCH 2009
The PTH04T240F power modules incorporate an input undervoltage lockout (UVLO). The UVLO feature
prevents the operation of the module until there is sufficient input voltage to produce a valid output voltage. This
enables the module to provide a clean, monotonic powerup for the load circuit, and also limits the magnitude of
current drawn from the regulator input source during the power-up sequence.
The UVLO characteristic is defined by the ON threshold (VTHD) voltage. Below the ON threshold, the Inhibit
control is overridden, and the module does not produce an output. The hysteresis voltage, which is the difference
between the ON and OFF threshold voltages, is set at 500 mV. The hysteresis prevents start-up oscillations,
which can occur if the input voltage droops slightly when the module begins drawing current from the input
source.
The UVLO feature of the PTH04T240F module allows for limited adjustment of the ON threshold voltage. The
adjustment is made via the Inhbit/UVLO Prog control pin (pin 11) using a single resistor (see Figure 16). When
pin 11 is left open circuit, the ON threshold voltage is internally set to the 1.95-V default value. The ON threshold
might need to be raised if the module is powered from a tightly regulated 5-V bus. Adjusting the threshold
prevents the module from operating if the input bus fails to completely rise to its specified regulation voltage.
Equation 4 determines the value of RUVLO required to adjust VTHD to a new value. The default value is 1.95 V,
and it may be adjusted to a higher value only.
Table 6 lists the standard resistor values for RUVLO for different values of the on-threshold (VTHD) voltage.
Table 6. Standard RUVLO values for Various VTHD values
VTHD(V)
2.5
3.0
3.5
4.0
4.5
RUVLO (kΩ)
154
71.5
53.6
33.2
26.7
Figure 16. Undervoltage Lockout Adjustment Resistor Placement
Copyright 2008–2009, Texas Instruments Incorporated
19
Product Folder Link(s): PTH04T240F
相关PDF资料 |
PDF描述 |
|---|---|
| PTH04T240FAZT | 1-OUTPUT DC-DC REG PWR SUPPLY MODULE |
| PTH04T240FAS | 1-OUTPUT DC-DC REG PWR SUPPLY MODULE |
| PTH04T240FAZ | 1-OUTPUT DC-DC REG PWR SUPPLY MODULE |
| PTH04T240FAST | 1-OUTPUT DC-DC REG PWR SUPPLY MODULE |
| PTH04T240WAD | 1-OUTPUT DC-DC REG PWR SUPPLY MODULE |
相关代理商/技术参数 |
参数描述 |
|---|---|
| PTH04T240FAS | 功能描述:DC/DC转换器 10A,2.2V-5.5V Inp 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: |
| PTH04T240FAST | 功能描述:DC/DC转换器 10A,2.2V-5.5V Inp 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: |
| PTH04T240FAZ | 功能描述:DC/DC转换器 10A,2.2V-5.5V Inp 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: |
| PTH04T240FAZT | 功能描述:DC/DC转换器 10A,2.2V-5.5V Inp 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: |
| PTH04T240W | 制造商:TI 制造商全称:Texas Instruments 功能描述:10-A, 2.2-V to 5.5-V INPUT, NON-ISOLATED, WIDE-OUTPUT, ADJUSTABLE POWER MODULE WITH TURBOTRANS⑩ |
发布紧急采购，3分钟左右您将得到回复。