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| 型号： | TPS61087DRCRG4 |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | 4.8 A SWITCHING REGULATOR, 1500 kHz SWITCHING FREQ-MAX, PDSO10 |
| 封装： | GREEN, PLASTIC, SON-10 |
| 文件页数： | 29/30页 |
| 文件大小： | 964K |
| 代理商： | TPS61087DRCRG4 |
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COMP
FB
GM Amplifier
Vref
SW
GateDriverof
Power
Transistor
IN
SS
PWM
Generator
Currentlimit
and
SoftStart
t
Generator
OFF
t
ON
PGND
BiasVref = 1.238V
UVLO
ThermalShutdown
AGND
EN
FREQ
VIN
VS
SLVS821B – MAY 2008 – REVISED MARCH 2010
www.ti.com
DETAILED DESCRIPTION
Figure 13. Block Diagram
The boost converter is designed for output voltages up to 18.5 V with a switch peak current limit of 3.2 A
minimum. The device, which operates in a current mode scheme with quasi-constant frequency, is externally
compensated for maximum flexibility and stability. The switching frequency is selectable between 650 kHz and
1.2 MHz and the minimum input voltage is 2.5 V. To limit the inrush current at start-up a soft-start pin is
available.
TPS61087 boost converter’s novel topology using adaptive off-time provides superior load and line transient
responses and operates also over a wider range of applications than conventional converters.
The selectable switching frequency offers the possibility to optimize the design either for the use of small sized
components (1.2 MHz) or for higher system efficiency (650 kHz). However, the frequency changes slightly
because the voltage drop across the rDS(on) has some influence on the current and voltage measurement and
thus on the on-time (the off-time remains constant).
The converter operates in continuous conduction mode (CCM) as soon as the input current increases above half
the ripple current in the inductor, for lower load currents it switches into discontinuous conduction mode (DCM). If
the load is further reduced, the part starts to skip pulses to maintain the output voltage.
8
Copyright 2008–2010, Texas Instruments Incorporated
Product Folder Link(s): TPS61087
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TPS61087DRCT | 功能描述:直流/直流开关调节器 650kHz/1.2MHz Step Up DC-DC 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 |
| TPS61087DRCTG4 | 功能描述:直流/直流开关调节器 650kHz 1.2MHz Step- Up DC-DC Cnvrtr 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 |
| TPS61087DSCR | 功能描述:直流/直流开关调节器 18.5V,3.2A,650kHz DC-DC 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 |
| TPS61087DSCT | 功能描述:直流/直流开关转换器 18.5V,3.2A,650kHz DC-DC Converter RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| TPS61087EVM-317 | 功能描述:电源管理IC开发工具 TPS61087 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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