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参数资料
| 型号： | IR3513ZMTRPBF |
| 厂商： | International Rectifier |
| 文件页数： | 18/36页 |
| 文件大小： | 0K |
| 描述： | IC CTRL XPHASE3 POL 32-MLPQ |
| 标准包装： | 3,000 |
| 系列： | XPhase3™ |
| 应用： | 处理器 |
| 电流 - 电源： | 3mA |
| 电源电压： | 8 V ~ 16 V |
| 工作温度： | 0°C ~ 125°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) |
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VCC
ENABLE
VREF
SS/DEL
EAOUT
VOUT
PG
0.8V
3.2V
3.12V
1.4V
NOT RECOMMENDED FOR NEW DESIGNS
REPLACEMENT PRODUCT – IR3513ZMTRPBF
SOFT START
IR3513
START DELAY
TIME
PG DELAY TIME
NORMAL OPERATION
Figure 8 - Start-up sequence
Constant Over-Current Control during Soft Start
The over-current limit threshold is set by a resistor connected between OCSET and VREF pins. If the IIN pin
voltage, which is proportional to the average current plus VREF voltage, exceeds the OCSET voltage during soft
start, the constant over-current control is activated.
Figure 9 shows the constant over-current control with delay during soft start. The delay is required since over-
current conditions can occur as part of normal operation due to inrush current.
If an over-current occurs during soft start (before PG is asserted), the SS/DEL voltage is regulated by the over
current amplifier to limit the output current below the threshold set by OCSET voltage. If the over-current condition
persists after the delay time is reached, the fault latch will be set pulling the error amplifier’s output low and inhibiting
switching in the phase ICs. The SS/DEL capacitor will discharge until it reaches 0.2V and the fault latch is reset
allowing a normal soft start to occur. If an over-current condition is again encountered during the soft start cycle, the
constant over-current control actions will repeat and the converter will be in hiccup mode. The delay time is
controlled by a counter, which is triggered by the oscillator. The counter values vary with switching frequency per
phase in order to have a similar delay time for different switching frequencies.
Over-Current Hiccup Protection after Soft Start
The over current limit threshold is set by a resistor connected between OCSET and VREF pins. Figure 9 shows the
constant over-current control with delay after PG is asserted. The delay is required since over-current conditions
can occur as part of normal operation due to load transients or margin transitions.
If the IIN pin voltage, which is proportional to the average current plus VREF voltage, exceeds the OCSET voltage
after PG is asserted, it will initiate the discharge of the capacitor at SS/DEL. If the over-current condition persists
long enough for the SS/DEL capacitor to discharge below the 120mV offset of the delay comparator, the fault latch
will be set pulling the error amplifier’s output low and inhibiting switching in the phase ICs and de-asserting the PG
signal. The output current is not controlled during the delay time. The SS/DEL capacitor will discharge until it
reaches 200 mV and the fault latch is reset allowing a normal soft start to occur. If an over-current condition is
again encountered during the soft start cycle, the over-current action will repeat and the converter will be in hiccup
mode.
Page 18
May 11, 2008
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相关代理商/技术参数 |
参数描述 |
|---|---|
| IR3513ZMTRPBF-CUT TAPE | 制造商:IR 功能描述:IR3513 Series 16 V 3 mA Surface Mount XPhase3 POL Control IC - MLPQ-32 |
| IR3514 | 制造商:IRF 制造商全称:International Rectifier 功能描述:XPHASE3TM AMD HYBRID CONTROL IC |
| IR3514MPBF | 制造商:International Rectifier 功能描述: |
| IR3514MTRPBF | 功能描述:开关变换器、稳压器与控制器 COMPLETE AMD SVID OR PVID PWR SOLUTION 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 |
| IR3515SPBF | 制造商:International Rectifier 功能描述:MOSFET, Power;N-Ch;VDSS 150V;RDS(ON) 0.045Ohm;ID 41A;D2Pak;PD 200W;VGS +/-30V |
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