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参数资料
| 型号： | IR3086M |
| 厂商： | International Rectifier |
| 文件页数： | 19/34页 |
| 文件大小： | 0K |
| 描述： | IC PHASE CONTROLLER 20-MLPQ |
| 标准包装： | 5 |
| 系列： | XPhase™ |
| 应用： | 处理器 |
| 电流 - 电源： | 10mA |
| 电源电压： | 8.4 V ~ 14 V |
| 工作温度： | 0°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-MLPQ |
| 供应商设备封装： | 20-MLPQ（4x4） |
| 包装： | 剪切带 (CT) |
| 其它名称： | *IR3086M |
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IR3086
R CP =
C CP =
( 2 π ? f C ) 2 ? L E ? C E ? R FB ? V PWMRMP
V O * 1 + ( 2 π * f C * C * R C ) 2
10 ? L E ? C E
R CP
(27)
(28)
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 Equations (29) and (30), where R LE is the equivalent resistance of inductor DCR.
f C 1 =
R DRP
2 π * C E ? G CS * R FB ? R LE
(29)
θ C 1 = 90 ? A tan( 0 . 5 ) ?
180
π
(30)
Choose the desired crossover frequency fc around fc1 estimated by Equation (29) 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
/Dec around the crossover frequency. Choose resistor R FB1 according to Equation (31), and determine C FB and
R DRP from Equations (32) and (33).
R FB 1 =
1
2
R FB
to
R FB 1 =
2
3
R FB
(31)
C FB =
1
4 π ? f C ? R FB 1
(32)
C DRP =
( R FB + R FB 1 ) ? C FB
R DRP
(33)
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 Equations (34) and (35).
R CP =
C CP =
( 2 π ? f C ) 2 ? L E ? C E ? R FB ? V PWMRMP
V O
10 ? L E ? C E
R CP
(34)
(35)
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 FB is chosen according to Equations (15), and 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 Equation (36), and determine the component values based on Equations (37) to
π θ
(41),
K = tan[ ? ( C + 1 . 5 )]
4 180
Page 19 of 34
(36)
9/30 /04
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| IR3087 | 制造商:IRF 制造商全称:International Rectifier 功能描述:XPHASE PHASE IC WITH OPTI-PHASE, OVP, AND OVERTEMP DETECT |
| IR3087M | 功能描述:IC XPHASE W/OVP/TM CTRL 20-MLPQ RoHS:否 类别:集成电路 (IC) >> PMIC - 电源管理 - 专用 系列:XPhase™ 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 |
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