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| 型号： | IRS27952SPBF |
| 厂商： | International Rectifier |
| 文件页数： | 13/28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
Application Information and Additional Details
Information regarding the following topics is included as subsections within this section of the datasheet.
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General Description
IC Supply Circuit & Low start-up current
Multi-function 2 Pin Oscillator
Frequency and Dead-time Calculation
User initiated Micropower Sleep mode
Gate Drive Capability
System Protection Features
PCB Layout Tips
Additional Documentation
General Description
The IRS2795(1,2)(4) is a double-ended controller for the resonant half-bridge topology. It provides complementary
outputs with 50% (max) duty cycle; the high-side and low-side bridge devices are driven 180° out-of-phase for
exactly the same time. A programmable dead-time inserted between the turn-OFF of one switch and the turn-ON of
the other one guarantees soft-switching operation. The IC incorporates a multi-function oscillator that allows the
designer to program all the necessary features to control a half bridge resonant switch-mode power supply featuring
low standby power. The IC also incorporates additional protection features for robust operation and provides a high
performance solution while minimizing external components, design time, and printed circuit board real estate.
The IC enables the designer to externally program all the following features using a 2 pin RC oscillator – operating
frequency range (start-up, minimum and maximum frequency), dead time, soft-start time and sleep mode operation.
IRS2795(1,2)(4) also uses IR’s proprietary high-voltage technology to implement a VS sensing circuitry that
monitors the current through the low-side half bridge MOSFET for short circuit faults. By using the R DSON of the low-
side MOSFET, the IRS2795(1,2)(4) eliminates the need for an additional current sensing resistor, filter and current-
sensing pin. This protection feature is latched and the thresholds are fixed at 2V for IRS27951 and 3V for
IRS27952(4).
Finally, the controller IC also features a micro power startup current (ICC<100μA) and a user initiated sleep mode
during which the IC power consumption is less than 200μA (@ Vcc=15V). The sleep mode function allows system
designs with reduced standby power consumption and can be used to meet stringent energy standards from Blue
Angel, Energy Star etc.
IC Supply Circuit & Low start-up current
The UVLO circuit maintains the IC in UVLO mode if the VCC pin voltage is less than the VCC turn-on threshold,
VCCON. If the VCC pin voltage drops below the UVLO threshold VCCUVLO at anytime after start-up, the IC is
pushed back into UVLO mode. The current consumption in this mode is less than 100uA.
VCC
VCCON
VCCUVLO
UVLO
NORMAL
UVLO
Figure 1: VCC Under Voltage Lockout
November 8 , 2012
13
? 2012 International Rectifier
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 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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