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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： | 26/47页 |
| 文件大小： | 778K |
| 代理商： | IR3500MTRPBF |
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IR3500
Page 26 of 47
June 12, 2007
VID + 0.13V
VCCL - 1V
SS/DEL
3.92V (4V-0.08V)
ROSC/OVP
OUTPUT
VOLTAGE
(VOSEN+)
VCCL+0.7V
VCCL+0.7V
0.6V
VCCLDRV
VCCL UVLO
1.73V
VCC
12V
Figure 18 - Over-voltage protection with pre-charging converter output VID + 0.13V <Vo < 1.73V
During dynamic VID down, OVP may be triggered when output voltage can not follow VDAC voltage change at light
load with large output capacitance. Therefore, over-voltage threshold is raised to 1.73V from VDAC+130mV
whenever dynamic VID is detected and the difference between output voltage and VDAC is more than 50mV, as
shown in Figure 19. The over-voltage threshold is changed back to VDAC+130mV if the difference is smaller than
50mV.
The overall system must be considered when designing for OVP. In many cases the over-current protection of the
AC-DC or DC-DC converter supplying the multiphase converter will be triggered and provide effective protection
without damage as long as all PCB traces and components are sized to handle the worst-case maximum current. If
this is not possible, a fuse can be added in the input supply to the multiphase converter.
Open Remote Sense Line Protection
The IR3500 checks for open remote sense lines every time it is enabled and will not power on if there is an open
sense line fault. If either remote sense line VOSEN+ or VOSEN- or both are open, the output of the remote sense
amplifier (VO) drops. The IR3500 monitors its VO pin voltage continuously during normal operation. If the VO
voltage is lower than 200 mV, two separate pulse currents are applied to VOSEN+ and VOSEN- pins respectively to
check if the sense lines are open. If VOSEN+ is open, a voltage higher than 90% of V(VCCL) will be present at
VOSEN+ pin and the output of open line detect comparator will be high. If VOSEN- is open, a voltage higher than
700mV will be present at VOSEN- pin and the output of open-line-detect comparator will be high. The open sense
line fault latch is set, which pulls the error amplifier output low immediately and shuts down the converter. The
SS/DEL voltage is discharged and the fault latch can only be reset by cycling VCCL power.
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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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