参数资料
型号: IR3521MTRPBF
厂商: International Rectifier
文件页数: 31/45页
文件大小: 0K
描述: IC CTRL XPHASE3 SVID 32-MLPQ
标准包装: 3,000
系列: XPhase3™
应用: 处理器
电流 - 电源: 10mA
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: 带卷 (TR)
IR3521
IDD Dynamic OC Limit Capacitor
The latest AMD processors require two over current limits: one for normal thermal design current (TDC) operation and
the other for system IDD_Spike. TDC over-current is set by following instructions outlined in the Over Current Setting
Resistor Rocset section. IDD_Spike occur when the load current exceeds the TDC for a very short duration (10 ms).
Figure 18 shows the boundaries of an event. The current over a moving average of 10 ms does not exceed the TDC
limit. Higher IDD-Spike will last for a shorter duration.
OCP-IDDSpike
IDDSpike
OCP-TDC
TDC
1
2
3
4
5 6
7
8
9
10
Time (ms)
Figure 18 Showing IDD_Spike Boundaries
The IDD_Spike over current threshold can be implemented by incorporation a properly sized capacitor between
the OCSET (18) and the IN1 (21) pins (see Figure 19).
Phase IC
1
Phase IC
2
IOUT
IOUT
High-pass filter
C IDDSpike
IIN
Phase IC
3
IOUT
R OCSET
OCSET1
VDAC
OCSET
comparator
Control IC
R VDAC
Phase IC
4
IOUT
C VDAC
Figure 19 C IDDSpike and R OCSET form a High Pass Filter
Page 31
V3.03
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