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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： | 11/31页 |
| 文件大小： | 615K |
| 代理商： | TPS43000PWRG4 |
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TPS43000
SLUS489 OCTOBER 2001
19
www.ti.com
APPLICATION INFORMATION
For a boost converter, the average output current is related to the peak inductor current by the following
equation:
I
pk +
V
OUT
I
OUT
h
V
IN
)
V
IN
D
2
f
SW
L
where fSW is the switching frequency, L is the inductor value, and D is the duty cycle. The duty cycle for a boost
converter is defined as:
D
+
V
OUT *
V
IN
V
OUT
Note that in these equations the voltage drop across the rectifier has been neglected.
nonsynchronous boost converter
The TPS43000 can also be used in non-synchronous applications to provide output voltages greater than 8 V
from low voltage inputs. Figure 6 shows the TPS43000 in a non-synchronous boost converter (750 kHz)
application with an input voltage range of 2.5 V to 9.0 V, an output voltage of 12 V, and a load current from 0
A to 1 A. Since none of the device pins are exposed to the boosted voltage, the output voltage is limited only
by the ratings of the external MOSFET, rectifier, and filter capacitor. At these higher output voltages, good
efficiency is maintained since the rectifier drop is small compared to the output voltage. Note that the PFM mode
can still be used to maintain high efficiency at light load.
Since all the power supply pins (VIN, VOUT, VP) operate off the input voltage, it must be greater than 2.5 V and
high enough to assure proper gate drive to the charge MOSFET.
(19)
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 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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