参数资料
型号: ISL62881CIRTZ
厂商: Intersil
文件页数: 23/37页
文件大小: 0K
描述: IC REG PWM SGL PHASE 28TQFN
标准包装: 75
应用: 控制器,Intel IMVP-6.5?
输入电压: 4.5 V ~ 25 V
输出数: 1
输出电压: 0.013 V ~ 1.5 V
工作温度: -40°C ~ 100°C
安装类型: 表面贴装
封装/外壳: 28-WFQFN 裸露焊盘
供应商设备封装: 28-TQFN-EP(4x4)
包装: 管件
配用: ISL62881CCPUEVAL2Z-ND - EVAL BOARD ISL62881CCPU 28QFN
Compensation & Current Sensing Network Design for Intersil Multiphase R^3 Regulators for IMVP-6.5
Jia Wei, jwei@intersil.com, 919-405-3605
Attention: 1. "Analysis ToolPak" Add-in is required. To turn on, go to Tools--Add-Ins, and check "Analysis ToolPak".
2. Green cells require user input
Operation Parameters
Compensator Parameters
Current Sensing Network Parameters
K Z i ? Z i ? ¨¨ 1  
? ? ¨ 1  
?
s ? ¨ 1  
? ? ¨ 1  
?
2 S f p 1 ? 1 ¨ ?
2 S f p 2 ? 1
?
Controller Part Number: ISL6288x
Phase Number:
Vin:
Vo:
Full Load Current:
Estimated Full-Load Efficiency:
Number of Output Bulk Capacitors:
2
12 volts
1.15 volts
50 Amps
87 %
3
A V ( s )
§ s · § s ·
¨
§ s · § s ·
1 ? 1
? 2 S f z 1 ? ¨ 2 S f z 2 ?
Capacitance of Each Output Bulk Capacitor:
ESR of Each Output Bulk Capacitor:
ESL of Each Output Bulk Capacitor:
Number of Output Ceramic Capacitors:
Capacitance of Each Output Ceramic Capacitor:
ESR of Each Output Ceramic Capacitor:
ESL of Each Output Ceramic Capacitor:
Switching Frequency:
Inductance Per Phase:
CPU Socket Resistance:
Desired Load-Line Slope:
Desired ISUM- Pin Current at Full Load:
470 uF
4.5 m :
0.6 nH
30
10 uF
3 m :
3 nH
300 kHz
0.36 uH
0.9 m :
1.9 m :
33.1 uA
Recommended Value User-Selected Value
R1 2.870 k : R1 2.87 k :
R2 387.248 k : R2 412 k :
R3 0.560 k : R3 0.562 k :
C1 188.980 pF C1 150 pF
C2 498.514 pF C2 390 pF
C3 32.245 pF C3 32 pF
Use User-Selected Value (Y/N)? N
Performance and Stability
T1 Bandwidth: 190kHz T2 Bandwidth: 52kHz
(This sets the over-current protection level) T1 Phase Margin: 63.4°
T2 Phase Margin: 94.7°
Operation Parameters
Changing the settings in red requires deep understanding of control loop design
Place the 2nd compensator pole fp2 at: 1.9 x fs (Switching Frequency)
Tune K i to get the desired loop gain bandwidth
Tune the compensator gain factor K i: 1.15
(Recommended K i range is 0.8~2)
Inductor DCR
Rsum
Rntc
Rntcs
Rp
0.88 m :
3.65 k :
10 k :
2.61 k :
11 k :
   
  
  
  
  
 
   
Loop Gain, Gain Curve
7  V 
7  V 
 
 
 
 
 
 
 
 
Output Impedance, Gain Curve
Recommended Value
Cn 0.294 uF
Ri 1014.245 :
User Selected Value
Cn 0.294 uF
Ri 1000 :
   
 
  (   
  (   
  (      (   
  (   
  (   
  (   
  (   
  (   
  (   
  (   
  (   
)UHTXHQF  +] 
)UHTXHQF  +] 
  
 
   
    
Loop Gain, Phase Curve
7  V 
7  V 
  
  
 
   
Output Impedance, Phase Curve
    
  (   
  (   
  (      (   
)UHTXHQF  +] 
  (   
  (   
   
  (   
  (   
  (      (   
)UHTXHQF  +] 
  (   
  (   
FIGURE 23. SCREENSHOT OF THE COMPENSATOR DESIGN SPREADSHEET
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