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| 型号： | TPS61201DRCR |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | 1.5 A BATTERY CHARGE CONTROLLER, 1650 kHz SWITCHING FREQ-MAX, PDSO10 |
| 封装： | 3 X 3 MM, GREEN, PLASTIC, SON-10 |
| 文件页数： | 6/28页 |
| 文件大小： | 1012K |
| 代理商： | TPS61201DRCR |
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Softstart and Short-Circuit Protection
Undervoltage Lockout
Overtemperature Protection
SLVS577B – MARCH 2007 – REVISED FEBRUARY 2008
After being enabled, the device starts operating. At first it keeps the main output VOUT disconnected, and
charges the capacitor at VAUX. If the capacitor at VAUX is charged to about 2.5 V, the device switches to
normal operation. This means VOUT is turned on and the capacitor at VOUT is charged while the load
connected to the device is supplied. To ramp up the output voltage in a controlled way, the average current limit
is set to 400 mA and rise proportional to the increase of the output voltage. At an output voltage of about 1.2 V,
the current limit is at its nominal value. If the output voltage does not increase, the current limit will not increase.
There is no timer implemented. Thus the output voltage overshoot at startup, as well as the inrush current, is
kept at a minimum. The device ramps up the output voltage in a controlled manner even if a large capacitor is
connected at the output. When the output voltage does not increase above 1.2 V, the device assumes a
short-circuit at the output, and keeps the current limit low to protect itself and the application. When there is a
short at the output during operation, the current limit is decreased accordingly.
An undervoltage lockout function prevents the main output at VOUT from being supplied if the voltage at UVLO
drops below 0.25 V. When using a resistive divider at the voltage to be monitored, for example the supply
voltage, any threshold for the monitored voltage can be programmed. If in undervoltage lockout mode, the device
still maintains its supply voltage at VAUX, but it is not turned off until EN is programmed low. This undervoltage
lockout function is implemented in order to prevent the malfunctioning of the converter.
The device has a built-in temperature sensor which monitors the internal IC temperature. If the temperature
exceeds the programmed threshold (see electrical characteristics table), the device stops operating. As soon as
the IC temperature has decreased below the programmed threshold, it starts operating again. There is a built-in
hysteresis to avoid unstable operation at IC temperatures at the overtemperature threshold.
14
Copyright 2007–2008, Texas Instruments Incorporated
Product Folder Link(s): TPS61200 TPS61201 TPS61202
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| TPS61201DRCRG4 | 功能描述:直流/直流开关调节器 0.3V In 3.3V Out Vltg Boost Converter RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| TPS61201DRCT | 功能描述:直流/直流开关调节器 0.3V In Vltg Boost RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| TPS61201DRCT | 制造商:Texas Instruments 功能描述:DC/DC Charge Pump Converter (DC-DC) IC |
| TPS61201DRCTG4 | 功能描述:直流/直流开关调节器 0.3V In 3.3V Out Vltg Boost Converter RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| TPS61201EVM-179 | 功能描述:电源管理IC开发工具 TPS1201EVM-179 Evaluation Module RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
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