参数资料
型号: IR3080MTR
厂商: International Rectifier
文件页数: 29/41页
文件大小: 0K
描述: IC PHASE CONTROLLER 32L MLPQ
标准包装: 3,000
系列: XPhase™
应用: 处理器
电流 - 电源: 11mA
电源电压: 9.5 V ~ 14 V
工作温度: 0°C ~ 100°C
安装类型: 表面贴装
封装/外壳: 32-VFQFN 裸露焊盘
供应商设备封装: 32-MLPQ(5x5)
包装: 带卷 (TR)
IR3080
R DRP =
R FB ? R L _ MAX ? G CS _ MIN
n ? R O
=
365 ? 0 . 61 * 10 ? 3 ? 30 . 2
6 ? 0 . 91 * 10 ? 3
= 1 . 21 k ?
Control IC Over Temperature Setting Resistors R HOTSETC1 and R HOTSETC2
Set the temperature threshold at 115 oC, which corresponds to the IC die temperature of 116 oC. Calculate the
HOTSET threshold voltage corresponding to the temperature thresholds.
V HOTSET = 4 . 73 * 10 ? 3 * T J + 1 . 241 = 4 . 73 * 10 ? 3 ? 116 + 1 . 241 = 1 . 79 V , Choose R HOTSETC1 =20.0k ? ,
R HOTSETC 2 =
R HOTSETC 1 ? V HOTSET
V BIAS ? V HOTSET
=
20 * 10 3 ? 1 . 79
6 . 8 ? 1 . 79
= 7 . 15 k ?
Body Braking Related Resistors R BBFB and R BBDRP
N/A. The body braking during Dynamic VID is disabled.
IR3086 EXTERNAL COMPONENTS
PWM Ramp Resistor R PWMRMP and Capacitor C PWMRMP
Set PWM ramp magnitude V PWMRMP =0.8V. Choose 220pF for PWM ramp capacitor C PWMRMP , and calculate the
resistor R PWMRMP ,
R PWMRMP =
V O
V IN ? f SW ? C PWMRMP ? [ln( V IN ? V DAC ) ? ln( V IN ? V DAC ? V PWMRMP )]
=
1 . 33
12 ? 400 * 10 3 ? 220 * 10 ? 12 ? [ln( 12 ? 1 . 35 ) ? ln( 12 ? 1 . 35 ? 0 . 8 )]
= 16 . 1 k ? , Choose R PWMRMP =16.2k ?
Inductor Current Sensing Capacitor C CS+ and Resistors R CS+ and R CS-
Choose C CS+ =47nF and calculate R CS+,
R CS + =
L R L
C CS +
=
220 * 10 ? 9 /( 0 . 47 * 10 ? 3 )
47 * 10 ? 9
= 10 . 0 k ?
The bias currents of CSIN+ and CSIN- are 0.25uA and 0.4uA respectively. Calculate resistor R CS- ,
R CS ? =
0 . 25
0 . 4
? R CS + =
0 . 25
0 . 4
? 10 . 0 * 10 3 = 6 . 2 k ? , Choose R CS- =6.19k ?
Over Temperature Setting Resistors R HOTSET1 and R HOTSET2
Use central over temperature setting and set the temperature threshold at 115 oC, which corresponds the IC die
temperature of 116 oC. Calculate the HOTSET threshold voltage corresponding to the temperature thresholds.
V HOTSET = 4 . 73 * 10 ? 3 * T J + 1 . 241 = 4 . 73 * 10 ? 3 ? 116 + 1 . 241 = 1 . 79 V
Pre-slect R HOTSET1 =10.0k ? ,
R HOTSET 2 =
R HOTSET 1 ? V HOTSET
V BIAS ? V HOTSET
=
10 * 10 3 ? 1 . 79
6 . 8 ? 1 . 79
= 3 . 57 k ?
Phase Delay Timing Resistors R PHASE1 and R PHASE2
Use central over temperature setting and set the temperature threshold at 115 oC, which corresponds the IC die
temperature of 116 oC. Calculate the HOTSET threshold voltage corresponding to the temperature thresholds.
Page 29 of 41
9 /30/04
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