参数资料
型号: IR3500MPBF
厂商: International Rectifier
文件页数: 39/47页
文件大小: 0K
描述: IC XPHASE3 CONTROL 32-MLPQ
标准包装: 100
系列: XPhase3™
应用: 处理器
电流 - 电源: 6.5mA
电源电压: 4.75 V ~ 7.5 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: 剪切带 (CT)
IR3500
The soft start time is
TD 2 =
C SS / DEL * 1.1
I CHG
=
0. 1 * 10 ? 6 * 1.1
52 . 5 * 10 ? 6
= 2 . 1 mS
The VID sample delay time is
TD 3 =
C SS / DEL * (3. 2 ? 1 .4 ? 1. 1)
I CHG
=
0. 1 *10 ? 6 * 0. 7
52 . 5 * 10 ? 6
= 1 . 33 mS
VID rise time is
TD 4 =
C SS / DEL * V DAC ? 1 .1
I CHG
=
0 .1 * 10 ? 6 * 1 . 3 ? 1 .1
52 . 5 * 10 ? 6
= 0 . 38 mS
The VR ready delay time is
TD 5 =
C SS / DEL * ( 3. 92 ? 3)
I CHG
? TD 4 =
0. 1 * 10 ? 6 * 0. 92
52 . 5 * 10 ? 6
? TD 4 = 1 . 37 mS
Minimum over current fault latch delay time is
t OCDEL =
C SS / DEL * 0 .12
I OCDISCHG
=
0. 1 * 10 ? 6 * 0. 12
55 * 10 ? 6
= 0 . 21 ms
VDAC Slew Rate Programming Capacitor C VDAC and Resistor R VDAC
Calculate the VDAC down-slope slew-rate programming capacitor from the required down-slope slew rate. The
up-slope slew rate is the same as the down-slope slew rate.
C VDAC =
I SINK
SR DOWN
=
44 * 10 ? 6
2 . 5 * 10 ? 3 / 10 ? 6
= 18 nF
Calculate the programming resistor.
R VDAC = 0 . 5 +
3 . 2 * 10 ? 15
C VDAC 2
= 0 . 5 +
3 . 2 * 10 ? 15
( 18 * 10 ? 9 ) 2
= 10 ?
Over Current Setting Resistor R OCSET
The room temperature is 25oC and the target PCB temperature is 100 oC. The phase IC die temperature is about
1 oC higher than that of phase IC, and the inductor temperature is close to PCB temperature.
Calculate Inductor DC resistance at 100 oC,
R L _ MAX = R L _ ROOM ? [ 1 + 3850 * 10 ? 6 ? ( T L _ MAX ? T ROOM )] = 0 . 5 * 10 ? 3 ? [ 1 + 3850 * 10 ? 6 ? ( 100 ? 25 )] = 0 . 64 m ?
Set the over current limit at 135A. From Figure 22, the bias current of OCSET pin (I OCSET ) is 40uA with
R OSC =15k . The total current sense amplifier input offset voltage is 0.3mV, which includes the offset created by
the current sense amplifier (CSA) input bias current through the resistor R CS .
V CS _ TOFST = 0 . 3 mV
Page 39 of 47
May 18, 2009
相关PDF资料
PDF描述
IR3500VMTRPBF IC XPHASE3 CTLR VR11.1 32-MLPQ
IR3502AMTRPBF IC XPHASE CTRL VR11.0/1 32-MLPQ
IR3502BMTRPBF IC REG XPH INTEL VR11.1 32-MLPQ
IR3502MTRPBF IC XPHASE3 CONTROLLER 32-MLPQ
IR3503MTRPBF IC CTRL XPHASE VR11.0/1 32-MLPQ
相关代理商/技术参数
参数描述
IR3500MTRPBF 功能描述:开关变换器、稳压器与控制器 COMPLETE VR11.0 OR AMD PVID PWR SOLTION RoHS:否 制造商:Texas Instruments 输出电压:1.2 V to 10 V 输出电流:300 mA 输出功率: 输入电压:3 V to 17 V 开关频率:1 MHz 工作温度范围: 安装风格:SMD/SMT 封装 / 箱体:WSON-8 封装:Reel
IR3500V 制造商:IRF 制造商全称:International Rectifier 功能描述:XPHASE3TM VR11.1 CPU VTT CONTROL IC
IR3500VMPBF 制造商:IRF 制造商全称:International Rectifier 功能描述:XPHASE3TM VR11.1 CPU VTT CONTROL IC
IR3500VMTRPBF 功能描述:开关变换器、稳压器与控制器 X-PHASE IR3500V AMD SVID CTRL IC RoHS:否 制造商:Texas Instruments 输出电压:1.2 V to 10 V 输出电流:300 mA 输出功率: 输入电压:3 V to 17 V 开关频率:1 MHz 工作温度范围: 安装风格:SMD/SMT 封装 / 箱体:WSON-8 封装:Reel
IR3502 制造商:IRF 制造商全称:International Rectifier 功能描述:XPHASE3TM CONTROL IC