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| 型号： | TPS40200HD |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封装： | PLASTIC, SOIC-8 |
| 文件页数： | 9/45页 |
| 文件大小： | 917K |
| 代理商： | TPS40200HD |
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8
5
+
1.3V
VDD
GND
200K
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545k
RUN
TPS40200
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36K
www.ti.com
SGLS400B – OCTOBER 2009 – REVISED MAY 2010
MOSFET Gate Drive
The output driver sinking current is approximately 200 mA and is designed to drive P-channel power FETs. When
the driver pulls the gate charge of the FET, it is controlling to –8 V, the drive current folds back to a low level so
that high power dissipation only occurs during the turnon period of the FET. This feature is particularly valuable
when turning on a FET at high input voltages, where leaving the gate drive current on would otherwise cause
unacceptable power dissipation.
Undervoltage Lockout (UVLO) Protection
UVLO protection ensures proper startup of the device only when the input voltage has exceeded minimum
operating voltage. Undervoltage protection incorporates hysteresis, which eliminates hiccup starting in cases
where input supply impedance is high.
Figure 29. Undervoltage Lockout
Undervoltage protection ensures proper startup of the device only when the input voltage has exceeded
minimum operating voltage. The UVLO level is measured at the VDD pin with respect to GND. Startup voltage is
typically 4.3 V, with approximately 200 mV of hysteresis. The part shuts off at a nominal 4.1 V. As shown in
Figure 29, when the input VDD voltage rises to 4.3 V , the 1.3-V comparator’s threshold voltage is exceeded and
a RUN signal occurs. Feedback from the output closes the switch and shunts the 200-k
resistor so that an
approximate 200-mV lower voltage, or 4.1 V, is required before the part shuts down.
Copyright 2009–2010, Texas Instruments Incorporated
17
Product Folder Link(s): TPS40200-HT
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TPS40200-HT | 制造商:TI 制造商全称:Texas Instruments 功能描述:WIDE-INPUT-RANGE NONSYNCHRONOUS VOLTAGE-MODE CONTROLLER |
| TPS40200MDREP | 功能描述:DC/DC 开关控制器 Mil Enhanced Nonsync Vltg-Mode Cntrlr RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| TPS40200MDREPG4 | 功能描述:电压模式 PWM 控制器 EP DC/DC CONTROLLER RoHS:否 制造商:Texas Instruments 输出端数量:1 拓扑结构:Buck 输出电压:34 V 输出电流: 开关频率: 工作电源电压:4.5 V to 5.5 V 电源电流:600 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 封装 / 箱体:WSON-8 封装:Reel |
| TPS40200-Q1 | 制造商:TI 制造商全称:Texas Instruments 功能描述:WIDE-INPUT-RANGE NONSYNCHRONOUS VOLTAGE-MODE CONTROLLER |
| TPS40200QDRQ1 | 功能描述:DC/DC 开关控制器 Wide-Inp-Rng Nonsync Vltg-Mode Cntrlr RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
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