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参数资料
型号： IR3500
厂商： International Rectifier
英文描述： XPHASE3TM VR11.0 & AMD PVID CONTROL IC
中文描述： XPHASE3TM VR11.0
文件页数： 34/47页
文件大小： 778K
代理商： IR3500
IR3500
Page 34 of 47
June 12, 2007
2
2
)
*
*
*
2
+
1
*
5
)
2
C
C
I
FB
E
E
C
CP
R
C
f
V
R
C
L
f
R
π
π
=
(26)
CP
E
E
CP
R
C
L
C
=
10
(27)
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 AVP Applications
Determine the compensation at no load, the worst case condition. Assume the time constant of the resistor and
capacitor across the output inductors matches that of the inductor, the crossover frequency and phase margin of
the voltage loop can be estimated by (28) and (29), where R
LE
is the equivalent resistance of inductor DCR.
R
f
*
*
2
π
LE
FB
CS
E
DRP
C
R
R
G
C
=
1
(28)
π
θ
180
)
tan(
90
1
=
A
C
(29)
Choose the desired crossover frequency fc around fc1 estimated by (28) or choose fc between 1/10 and 1/5 of
the switching frequency per phase, and select the components to ensure the slope of close loop gain is -20dB
per decade around the crossover frequency. Choose resistor R
FB1
according to (30), and determine C
FB
and
C
DRP
from (31) and (32).
1
1
=
to
FB
FB
R
R
3
1
FB
R
f
π
FB
FB
R
R
2
2
1
=
(30)
1
4
FB
C
C
=
(31)
DRP
FB
FB
FB
DRP
R
C
R
R
C
+
=
)
(
1
(32)
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 (33) and (34).
2
=
I
FB
E
E
C
CP
V
R
C
L
f
R
5
)
2
π
(33)
CP
E
E
CP
R
C
L
C
=
10
(34)
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 Non-AVP Applications
Resistor R
DRP
and capacitor C
DRP
are not needed. Choose the crossover frequency fc between 1/10 and 1/5 of
the switching frequency per phase and select the desired phase margin
θ
c. Calculate K factor from (35), and
determine the component values based on (36) to (40),
θ
π
)]
5
+
180
(
4
tan[
=
C
K
(35)
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相关代理商/技术参数
参数描述
IR3500A 制造商:IRF 制造商全称:International Rectifier 功能描述:XPHASE3TM VR11.0 & AMD PVID CONTROL IC
IR3500AMPBF 功能描述:IC CTRL XPHASE3 VR11.0 32-MLPQ RoHS:是 类别:集成电路 (IC) >> PMIC - 电源管理 - 专用 系列:XPhase3™ 应用说明:Ultrasound Imaging Systems Application Note 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:37 系列:- 应用:医疗用超声波成像，声纳 电流 - 电源:- 电源电压:2.37 V ~ 6 V 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:56-WFQFN 裸露焊盘 供应商设备封装:56-TQFN-EP（8x8） 包装:管件
IR3500AMTRPBF 功能描述:开关变换器、稳压器与控制器 IR3500 IC xPHASE3 AMD PVID CTRL IC 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
IR3500MPBF 功能描述:IC XPHASE3 CONTROL 32-MLPQ RoHS:是 类别:集成电路 (IC) >> PMIC - 电源管理 - 专用 系列:XPhase3™ 应用说明:Ultrasound Imaging Systems Application Note 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:37 系列:- 应用:医疗用超声波成像，声纳 电流 - 电源:- 电源电压:2.37 V ~ 6 V 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:56-WFQFN 裸露焊盘 供应商设备封装:56-TQFN-EP（8x8） 包装:管件
IR3500MTRPBF 功能描述:开关变换器、稳压器与控制器 COMPLETE VR11.0 OR AMD PVID PWR SOLTION 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
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