参数资料
型号: IR3094MPBF
厂商: International Rectifier
文件页数: 22/29页
文件大小: 0K
描述: IC REG CTRLR BUCK PWM VM 48MLPQ
标准包装: 200
PWM 型: 电压模式
输出数: 3
频率 - 最大: 540kHz
占空比: 100%
电源电压: 8 V ~ 16 V
降压:
升压:
回扫:
反相:
倍增器:
除法器:
Cuk:
隔离:
工作温度: 0°C ~ 150°C
封装/外壳: 48-MLPQ
包装: 剪切带 (CT)
IR3094PBF
R FB 1
1
2
R FB
to
R FB 1
2
3
R FB
(20)
4 S   f C   R FB 1
C FB
C DRP
1
( R FB   R FB 1 )   C FB
R DRP
(21)
(22)
( 2 S   f C ) 2   L E   C E   R FB   5
V I
R CP and C CP have limited effect on the crossover frequency, and are used only to fine tune the crossover frequency
and transient load response. Determine R CP and C CP from (23) and (24).
R CP (23)
C CP
10   L E   C E
R CP
(24)
switching frequency per phase and select the desired phas H PDUJLQ F  &DOFXODWH . IDFWRU IURP   25), and determine
C CP1 is optional and may be needed in some applications to reduce the jitter caused by the high frequency noise. A
ceramic capacitor between 10pF and 220pF is usually enough.
Type III Compensation for No Droop Applications
Resistor R DRP and capacitor C DRP are not needed. Choose the crossover frequency fc between 1/10 and 1/5 of the
the component values based on (26) to (30),
tan[   ( C   1 . 5 )]
R FB  
2 S   f C   R CP
2 S   f C   K   R CP
2 S   f C   R FB
2 S   f C   K   C FB
Page 22 of 29
K
R CP
C CP
C CP 1
C FB
R FB 1
4 180
S T
( 2 S   L E   C E   f C ) 2   5
V I   K
K
1
K
1
(25)
(26)
(27)
(28)
(29)
(30)
09/26/05
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