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参数资料
| 型号： | IR3721MTRPBF |
| 厂商： | International Rectifier |
| 文件页数： | 4/16页 |
| 文件大小： | 0K |
| 描述： | IC POWER SUPPLY MONITOR 10-DFN |
| 产品变化通告： | (EP) Parts Discontinuation 25/May/2012 |
| 标准包装： | 1 |
| 系列： | TruePower™ |
| 应用： | 电源监控器 |
| 电源电压： | 3.135 V ~ 3.465 V |
| 电流 - 电源： | 350µA |
| 工作温度： | 0°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-VFDFN 裸露焊盘 |
| 供应商设备封装： | 10-DFN-EP（3x3） |
| 包装： | 标准包装 |
| 产品目录页面： | 1384 (CN2011-ZH PDF) |
| 其它名称： | IR3721MTRPBFDKR |
IR3721
DATA SHEET
IC PIN FUNCTIONS
VDD PINS
These pins provide operational bias current to circuits
internal to the IR3721. Bypass them with a high
quality ceramic capacitor to the GND pins.
GND PINS
These pins return operational bias current to system
ground. VO is measured with respect to GND. The
GND pin sinks reference current established by the
external resistor R T .
VO PIN
Since this pin measures DCR voltage drop it is critical
that it be Kelvin connected to the buck inductor
output. Power accuracy may be degraded if the
voltage at this pin is below VO min .
VRT PIN
A voltage reference internal to the IR3721 drives the
V RT pin while the pin current is monitored and used to
set the amplitude of the current monitor switched
current source I REF . Connect this pin to GND through
a precision resistor network R T . This network may
include provision for canceling the positive
temperature coefficient of the buck inductor’s DC
resistance (DCR).
VK PIN
The voltage of the VK pin is used to modulate the
amplitude of the DI pin. This is one of the terms used
to determine the product of the multiplier output. If VK
is connected to a fixed voltage then the output of the
multiplier is proportional to current. If VK is connected
to the buck converter output voltage then the output
of the DI driven RC filter is proportional to power.
VCS PIN
A switched current source internal to the IR3721
maintains the average voltage of this pin equal to the
voltage of the VO pin. The average current into this
pin is therefore proportional to buck inductor current.
DI PIN
The Dl pin output has a duty ratio proportional to the
current into VCS, and an amplitude equal to the
voltage at the VK pin. The DI pin is intended to drive
an external low pass filter. The output of this filter is
the product of the current and voltage terms.
Page 4 of 16
www.irf.com
09/15/08
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相关代理商/技术参数 |
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| IR3725 | 制造商:IRF 制造商全称:International Rectifier 功能描述:INPUT POWER MONITOR WITH DIGITAL INTERFACE |
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| IR3725MPBF | 制造商:International Rectifier 功能描述:Power Monitor 12-Pin DFN EP 制造商:International Rectifier 功能描述:IR3725 Series 3.9 V 1126 kHz Input Power Monitor with Digital Interface - DFN-12 |
| IR3725MTRPBF | 功能描述:电流和电力监控器、调节器 INPUT PWR MONITOR IC 12V Rail 3.1 VDD RoHS:否 制造商:STMicroelectronics 产品:Current Regulators 电源电压-最大:48 V 电源电压-最小:5.5 V 工作温度范围:- 40 C to + 150 C 安装风格:SMD/SMT 封装 / 箱体:HPSO-8 封装:Reel |
| IR3741 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Analog IC |
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