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参数资料
| 型号： | TPS2012APWPG4 |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 电源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO14 |
| 封装： | PLASTIC, HTSSOP-14 |
| 文件页数： | 22/28页 |
| 文件大小： | 1282K |
| 代理商： | TPS2012APWPG4 |
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DETAILED DESCRIPTION
POWER SWITCH
CHARGE PUMP
DRIVER
ENABLE (EN)
CURRENT SENSE
THERMAL SENSE
UNDERVOLTAGE LOCKOUT
SLVS189C – DECEMBER 1998 – REVISED SEPTEMBER 2007
The power switch is an N-channel MOSFET with a maximum on-state resistance of 50 m
(VI(IN) = 5V).
Configured as a high-side switch, the power switch prevents current flow from OUT to IN and IN to OUT when
disabled.
An internal charge pump supplies power to the driver circuit and provides the necessary voltage to pull the gate
of the MOSFET above the source. The charge pump operates from input voltages as low as 2.7 V and requires
very little supply current.
The driver controls the gate voltage of the power switch. To limit large current surges and reduce the associated
electromagnetic interference (EMI) produced, the driver incorporates circuitry that controls the rise times and fall
times of the output voltage. The rise and fall times are typically in the 2-ms to 9-ms range.
The logic enable disables the power switch, the bias for the charge pump, driver, and other circuitry to reduce the
supply current to less than 10
μA when a logic high is present on EN . A logic zero input on EN restores bias to
the drive and control circuits and turns the power on. The enable input is compatible with both TTL and CMOS
logic levels.
A sense FET monitors the current supplied to the load. The sense FET measures current more efficiently than
conventional resistance methods. When an overload or short circuit is encountered, the current-sense circuitry
sends a control signal to the driver. The driver, in turn, reduces the gate voltage and drives the power FET into
its saturation region, which switches the output into a constant current mode and holds the current constant while
varying the voltage on the load.
An internal thermal-sense circuit shuts off the power switch when the junction temperature rises to approximately
140
°C. Hysteresis is built into the thermal sense circuit. After the device has cooled approximately 20°C, the
switch turns back on. The switch continues to cycle off and on until the fault is removed.
A voltage sense circuit monitors the input voltage. When the input voltage is below approximately 2 V, a control
signal turns off the power switch.
Copyright 1998–2007, Texas Instruments Incorporated
3
Product Folder Link(s): TPS2010A, TPS2011A TPS2012A, TPS2013A
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TPS2012APWPR | 功能描述:电源开关 IC - 配电 2.0A 2.7-5.5V Single Hi-Side MOSFET RoHS:否 制造商:Exar 输出端数量:1 开启电阻（最大值）:85 mOhms 开启时间（最大值）:400 us 关闭时间（最大值）:20 us 工作电源电压:3.2 V to 6.5 V 电源电流（最大值）: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOT-23-5 |
| TPS2012APWPRG4 | 功能描述:电源开关 IC - 配电 2.0A 2.7-5.5V Single Hi-Side MOSFET RoHS:否 制造商:Exar 输出端数量:1 开启电阻（最大值）:85 mOhms 开启时间（最大值）:400 us 关闭时间（最大值）:20 us 工作电源电压:3.2 V to 6.5 V 电源电流（最大值）: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOT-23-5 |
| TPS2012B | 功能描述:台式示波器 Digital ColorDisplay 100MHz 1GS/s 2-Ch RoHS:否 制造商:Teledyne LeCroy 通道:4 带宽:1 GHz 采样比:2.5 GS/s 显示器类型:Color TFT, LCD 输入电压:100 VAC to 240 VAC 设备类型:Digital Oscilloscopes 电缆类型:Global Power Cord Sets Included |
| TPS2012D | 功能描述:电源开关 IC - 配电 2.0A 2.7-5.5V Single Hi-Side MOSFET RoHS:否 制造商:Exar 输出端数量:1 开启电阻（最大值）:85 mOhms 开启时间（最大值）:400 us 关闭时间（最大值）:20 us 工作电源电压:3.2 V to 6.5 V 电源电流（最大值）: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOT-23-5 |
| TPS2012DG4 | 功能描述:电源开关 IC - 配电 2.0A 2.7-5.5V Single Hi-Side MOSFET RoHS:否 制造商:Exar 输出端数量:1 开启电阻（最大值）:85 mOhms 开启时间（最大值）:400 us 关闭时间（最大值）:20 us 工作电源电压:3.2 V to 6.5 V 电源电流（最大值）: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOT-23-5 |
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