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| 型号： | IRS27952SPBF |
| 厂商： | International Rectifier |
| 文件页数： | 12/28页 |
| 文件大小： | 0K |
| 描述： | IC DRIVER HALF-BRIDGE 8SOIC |
| 标准包装： | 95 |
| 输出隔离： | 隔离 |
| 频率范围： | 46.6kHz ~ 285kHz |
| 输入电压： | 12 V ~ 18 V |
| 输出电压： | 12 V ~ 18 V |
| 功率（瓦特）： | 833mW |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SOIC |
| 包装： | 管件 |
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IRS27951S
IRS27952(4)S
State Diagram
DC POWER ON
Gate Inactive
Oscillator Inactive
VCC < VCCUV-
UVLO
Oscillator Inactive
Gates Inactive
VCC > VCCUV+
VCC < VCCUV-
CURRENT FAULT
Oscillator and Gates Inactive
Internally discharge RT and CT pins
VCT < V EN2
VS > V OCP
@ LO=High
SLEEP
Oscillator and Gates Inactive
ICT = ICTSTART
ICC=ISLEEP
VCT > V EN1
NORMAL
Oscillator and Gates Active
ICTCHARGE=IRT
Over Current Protection Active
UVLO Mode
The IC remains in the UVLO condition until the voltage on the V CC pin exceeds the V CC turn on threshold voltage,
V CCUV+ . During the time the IC remains in the UVLO state, the gate drive circuit is inactive and the IC draws a
quiescent current of I CC START . The UVLO mode is accessible from any other state of operation whenever the IC
supply voltage condition of V CC < V CC UV- occurs.
Sleep Mode
When V CC exceeds the V CCUV+ threshold the IRS2795(1,2)(4) starts to charge up CT capacitor with I CT startup
current towards the enable threshold, V EN1 . During this period, the IC is in Sleep mode. The oscillator and gate
drive circuits are disabled and the Ic consumes I SLEEP .
When the voltage at the CT/SD pin exceeds V EN1 , the IC is pulled out of sleep mode and the 2V reference voltage
at the RT pin is enabled.
The IC can be placed in Sleep mode while operating in Normal mode by externally pulling the CT/SD pin below
V EN2 . When this occurs, the RT pin of the IC is internally discharged to COM to ensure a system restart with soft-
start.
Normal Mode
The IC enters in normal operating mode once the UVLO voltage and V EN1 has been exceeded. The RT pin
voltage is 2V under normal mode. Gate drive signal appears at HO and LO with fixed 50% duty-cycle.
During this mode, the over-current protection scheme using the VS sense circuitry is active.
Current Fault Mode
When operating in Normal mode, the IC senses the voltage on the VS pin each time the low-side device is turned
ON (with a leading edge blanking on LO, t blank ). When the voltage sensed exceeds VOCP, the IC terminates the
current gate pulse, disables the oscillator and gate drivers, and enters the Current Fault mode. When the IC
enters this state, RT and CT/SD pins are internally discharged and IC supply voltage must be recycled before the
IC can restart with soft-start again
November 8 , 2012
12
? 2012 International Rectifier
th
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相关代理商/技术参数 |
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|---|---|
| IRS27952STRPBF | 功能描述:功率驱动器IC Resonant 1/2 Brdg Cntrl IC RoHS:否 制造商:Micrel 产品:MOSFET Gate Drivers 类型:Low Cost High or Low Side MOSFET Driver 上升时间: 下降时间: 电源电压-最大:30 V 电源电压-最小:2.75 V 电源电流: 最大功率耗散: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Tube |
| IRS2980 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:功率半导体 |
| IRS2980S | 制造商:未知厂家 制造商全称:未知厂家 功能描述:LED DRIVER CONTROL IC |
| IRS2980SPBF | 功能描述:功率因数校正 IC Fluorescent PFC + Ballast Combo IC RoHS:否 制造商:Fairchild Semiconductor 开关频率:300 KHz 最大功率耗散: 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Reel |
| IRS2980STRPBF | 功能描述:功率因数校正 IC Fluorescent PFC + Ballast Combo IC RoHS:否 制造商:Fairchild Semiconductor 开关频率:300 KHz 最大功率耗散: 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Reel |
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