参数资料
型号: IR3092MPBF
厂商: International Rectifier
文件页数: 27/37页
文件大小: 0K
描述: IC VID VOLTAGE PROGRAMMER 48MLPQ
标准包装: 100
应用: VID 电压编程器
电源电压: 7.3 V ~ 21 V
电流 - 电源: 29mA
工作温度: 0°C ~ 125°C
安装类型: 表面贴装
封装/外壳: 48-MLPQ
供应商设备封装: 48-MLPQ(7x7)
包装: 剪切带 (CT)
Output Impedance: R O =1.3 m ?
Output Inductor(per phase): L=0.45 uH, R L =0.7 m ? (1m ? when winding temperatures around 120C)
IR3092PbF
DESIGN EXAMPLE
IR3092 Demo Board Rev.2 for VRD10.0 FMB1.5
Specifications:
Input Voltage: V I =12 V
DAC Voltage: V DAC =1.35 V
No Load Output Voltage Offset: V O_NLOFST =25 mV
Output Current: I O =80 A DC
Output Current Limit set point: I LIMIT =100 A
VCC Ready to VCC Power Good Delay: t VccPG =0-10mS
Soft Start Time: t SS =2 mS
Dynamic VID Down-Slope Slew Rate: SR DOWN =2.5mV/uS
Power Stage Design
Control IC: IR3092
Phase Number: n=2
Switching Frequency: f SW =180 kHz
Output Capacitors: C E =0.011F, R CE =1 m ?
External Components
Oscillator Resistor Rosc
Once the switching frequency is chosen, R OSC can be determined from the curve in this datasheet. For
switching frequency of 180 kHz per phase,
Choose R OSC =47.5k ?
Soft Start Capacitor C SS
Calculate the soft start capacitor from the required soft start time 6mS.
1 . 35   25 * 10 3
C SS
I CHG * t SS
V O
55 * 10 6 * 2 * 10 3
8 . 3 * 10 8 F
Choose C SS = 0.1 uF
With the selected Css value, we can calculate the following delay times:
The Over-Current fault latch delay time t OCDEL will be:
t OCDEL
C SS * ' V
I DISCHG
0 .1 * 10 6 * 0. 25
50 . 5 * 10 6
0 . 5 mS
Page 27 of 37
09/07/05
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