参数资料
型号: IR3514MTRPBF
厂商: International Rectifier
文件页数: 25/46页
文件大小: 0K
描述: IC XPHASE3 CONTROL HYBRD 40-MLPQ
产品变化通告: (EP) Parts Discontinuation 25/May/2012
标准包装: 1
系列: XPhase3™
应用: 处理器
安装类型: 表面贴装
封装/外壳: 40-MLPQ
供应商设备封装: 40-MLPQ(6x6)
包装: 标准包装
产品目录页面: 1383 (CN2011-ZH PDF)
其它名称: IR3514MTRPBFDKR
IR3514
Figure 12b Sending 1.55 VID to both outputs and turning off PSI mode
Over-Current Hiccup Protection after Soft Start
The over current limit threshold is set by a resistor connected between OCSETx and VDACx pins. Figure 13 shows
the hiccup over-current protection with delay after VRRDY is asserted. The delay is required since over-current
conditions can occur as part of normal operation due to load transients or VID transitions.
If the IINx pin voltage, which is proportional to the average current plus VDACx voltage, exceeds the OCSETx
voltage after VRRDY is asserted, it will initiate the discharge of the capacitor at SS/DELx through the discharge
current 47uA. If the over-current condition persists long enough for the SS/DELx 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 VRRDY signal. The SS/DEL capacitor will then continue to
discharge through the 4.5uA discharge current until it reaches 200 mV and the fault latch is reset allowing a normal
soft start to occur. The output current is not controlled during the delay time. 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 25 of 46
10/30/2007
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