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参数资料
| 型号： | TPS43000PWRG4 |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | SWITCHING CONTROLLER, 2000 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封装： | GREEN, TSSOP-16 |
| 文件页数： | 31/31页 |
| 文件大小： | 615K |
| 代理商： | TPS43000PWRG4 |
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TPS43000
SLUS489 OCTOBER 2001
9
www.ti.com
APPLICATION INFORMATION
general information
The TPS43000 is a high-frequency, synchronous PWM controller optimized for distributed power, or
battery-powered applications where size and efficiency are of critical importance. It includes high-speed,
high-current MOSFET drivers for those applications requiring low RDS(on) external MOSFETs. (See functional
block diagram).
optimizing efficiency
The TPS43000 optimizes efficiency and extends battery life with its low quiescent current and its synchronous
rectifier topology. The additional features of low-power (LP) mode and PFM mode maintain high efficiency over
a wide range of load current.
modes of operation
The TPS43000 has four distinct modes of operation:
D fixed PWM with discontinuous conduction mode (DCM) possible
D fixed PWM with forced continuous conduction mode (CCM)
D automatic pulse frequency modulation (PFM) with DCM possible
D PFM with forced CCM
The device mode is controlled by the CCM and PFM pins. The CCM pin lets the user decide whether to allow
DCM by connecting the pin to ground or to force CCM by connecting the pin to VIN. The PFM pin lets the user
decide whether to allow automatic PFM by connecting the pin to ground or to force fixed PWM by connecting
the pin to VIN.
fixed PWM with DCM possible (PFM tied to VIN; CCM tied to ground)
In this mode, the device behaves like a standard switching regulator with the addition of a synchronous rectifier.
Shortly after the energizing MOSFET turns off, the synchronous rectifier turns on. The synchronous rectifier
turns off either when the inductor current goes discontinuous (DCM) or just prior to the start of the next clock
cycle (CCM) when the energizing MOSFET turns on. During the small time interval when neither the energizing
MOSFET nor the synchronous rectifier are turned on, the synchronous rectifier MOSFET body diode (or an
optional small external Schottky diode in parallel) carries the current to the output until it goes discontinuous.
The efficiency drops off at light loads as the losses become a larger percentage of the delivered load.
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相关代理商/技术参数 |
参数描述 |
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| TPS43060 | 制造商:TI 制造商全称:Texas Instruments 功能描述:Low Quiescent Current Synchronous Boost DC-DC Controller with Wide VIN Range |
| TPS43060EVM-199 | 功能描述:电源管理IC开发工具 TPS43060 EVAL MOD 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 |
| TPS43060RTER | 功能描述:DC/DC 开关控制器 Sync Boost Cntlr Wide Input Vtg 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 |
| TPS43060RTET | 功能描述:DC/DC 开关控制器 Sync Boost Cntlr Wide Input Vtg 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 |
| TPS43061EVM-198 | 功能描述:电源管理IC开发工具 TPS43061 EVAL MOD 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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