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参数资料
| 型号： | IR3500MTRPBF |
| 厂商： | International Rectifier |
| 英文描述： | XPHASE3TM VR11.0 & AMD PVID CONTROL IC |
| 中文描述： | XPHASE3TM VR11.0 |
| 文件页数： | 22/47页 |
| 文件大小： | 778K |
| 代理商： | IR3500MTRPBF |
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IR3500
Page 22 of 47
June 12, 2007
OVER-CURRENT
PROTECTION
(OUTPUT SHORTED)
NORMAL
OPERATION
3.88V
1.1V
EA
HICCUP OVER-CURRENT
PROTECTION (OUTPUT
SHORTED)
POWER-DOWN
OCP
DELAY
START-UP WITH
OUTPUT SHORTED
NORMAL
OPERATION
3.92V
SS/DEL
IOUT
VOUT
VRRDY
ENABLE
OCP THRESHOLD
4.0V
NORMAL
START-UP
(OUTPUT
SHORTED)
NORMAL
START-UP
INTERNAL
OC DELAY
Figure 13 - Over Current Protection waveforms during and after soft start
Linear Regulator Output (VCCL)
The IR3500 has a built-in linear regulator controller, and only an external NPN transistor is needed to create a linear
regulator. The output voltage of the linear regulator can be programmed between 4.75V and 7.5V by the resistor
divider at VCCLFB pin. The regulator output powers the gate drivers and other circuits of the phase ICs along with
circuits in the control IC, and the voltage is usually programmed to optimize the converter efficiency. The linear
regulator can be compensated by a 4.7uF capacitor at the VCCL pin. As with any linear regulator, due to stability
reasons, there is an upper limit to the maximum value of capacitor that can be used at this pin and it’s a function of
the number of phases used in the multiphase architecture and their switching frequency. Figure 14 provides Bode
plots for the linear regulator with 5 phases switching at 750 kHz.
An external 5V can be connected to this pin to replace the linear regulator with appropriate selection of the VCCLFB
resistor divider, and VCCLDRV resistor. While using an external VCCL its essential to adjust it such that VCCLFB is
slightly higher than the 1.19V reference voltage. This condition ensures that the VCCLDRV pin doesn’t load the
ROSC pin. The switching frequency, VSETPT, and OCSET are derived from the loading current of ROSC pin.
Figure 14 - VCCL regulator stability with 5 phases and PHSOUT equals 750 kHz.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 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 |
| IR3502_09 | 制造商:IRF 制造商全称:International Rectifier 功能描述:XPHASE3TM CONTROL IC |
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