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| 型号： | IR3500AMPBF |
| 厂商： | International Rectifier |
| 文件页数： | 25/48页 |
| 文件大小： | 0K |
| 描述： | IC CTRL XPHASE3 VR11.0 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： | 管件 |
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IR3500A
which pulls error amplifier output low to turn off the converter output. At the same time IIN pin (ISHARE of phase
ICs) is pulled up to VCCL to communicate the over voltage condition to phase ICs, as shown in Figure 15. In each
phase IC, the OVP circuit overrides the normal PWM operation and will fully turn-on the low side MOSFET within
approximately 150ns. The low side MOSFET will remain on until ISHARE pin voltage drops below V(VCCL) -
800mV, which signals the end of over voltage condition. An over voltage fault condition is latched in the IR3500A
and can only be cleared by cycling power to the IR3500A VCCL.
OUTPUT
OVP
VOLTAGE
(VO)
THRESHOLD
130mV
VCCL-800 mV
IIN
(ISHARE)
GATEH
(PHASE IC)
GATEL
(PHASE IC)
FAULT
LATCH
ERROR
AMPLIFIER
OUTPUT
(EAOUT)
VDAC
NORMAL OPERATION
OVP CONDITION
AFTER
OVP
Figure 15 - Over-voltage protection during normal operation
In the event of a high side MOSFET short before power up, the OVP flag is activated with as little supply voltage as
possible, as shown in Figure 16. The VOSEN+ pin is compared against a fixed voltage of 1.73V (typical) for OVP
conditions at power-up. The ROSC/OVP pin will be pulled higher than 1.6V with VCCLDRV voltage as low as 1.8V.
An external MOSFET or comparator should be used to disable the silver box, activate a crowbar, or turn off the
supply source. The 1.8V threshold is used to prevent false over-voltage triggering caused by pre-charging of output
capacitors.
Pre-charging of converter output voltage may trigger OVP. If the converter output is pre-charged above 1.73V as
shown in Figure 17, ROSC/OVP pin voltage will be higher than 1.6V when VCCLDRV voltage reaches 1.8V.
ROSC/OVP pin voltage will be VCCLDRV-1V and rise with VCCLDRV voltage until VCCL is above UVLO threshold,
after which ROSC/OVP pin voltage will be VCCL-1V. The converter cannot start unless the over voltage condition
stops and VCCL is cycled. If the converter output is pre-charged 130mV above VDAC but lower than 1.73V, as
shown in Figure 17, the converter will soft start until SS/DEL voltage is above 3.92V (4.0V-0.08V). Then, over
voltage comparator is activated and fault latch is set.
Page 25 of 48
July 28, 2009
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相关代理商/技术参数 |
参数描述 |
|---|---|
| IR3500AMTRPBF | 功能描述:开关变换器、稳压器与控制器 IR3500 IC xPHASE3 AMD PVID 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 |
| IR3500MPBF | 功能描述:IC XPHASE3 CONTROL 32-MLPQ RoHS:是 类别:集成电路 (IC) >> PMIC - 电源管理 - 专用 系列:XPhase3™ 应用说明:Ultrasound Imaging Systems Application Note 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:37 系列:- 应用:医疗用超声波成像，声纳 电流 - 电源:- 电源电压:2.37 V ~ 6 V 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:56-WFQFN 裸露焊盘 供应商设备封装:56-TQFN-EP（8x8） 包装:管件 |
| 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 |
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