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参数资料
| 型号： | IR3094MPBF |
| 厂商： | International Rectifier |
| 文件页数： | 21/29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： | 是 |
| 升压： | 无 |
| 回扫： | 无 |
| 反相： | 无 |
| 倍增器： | 无 |
| 除法器： | 无 |
| Cuk： | 无 |
| 隔离： | 无 |
| 工作温度： | 0°C ~ 150°C |
| 封装/外壳： | 48-MLPQ |
| 包装： | 剪切带 (CT) |
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IR3094PBF
CCP1
CCP1
VO+
RFB
RCP
CCP
RCP
CCP
RFB1
CFB
FB
-
VREF
VO+
RFB
FB
-
EAOUT
EAOU T
VDRP
RDRP
VDAC
+
EAOUT
EAOU T
VDRP
RDRP
VREF
VDAC
+
CDRP
( a) Type II compensation
(b) Type III compensation
( 2 S f C ) 2 L E C E R FB 5
V I * 1 ( 2 S * f C * C * R C ) 2
Figure 9. Voltage loop compensation networks
Type II Compensation for Voltage Droop Applications
Determine the compensation at no load, the worst case condition. Choose the crossover frequency fc between 1/10
and 1/5 of the switching frequency per phase. Assume the time constant of the resistor and capacitor across the
output inductors matches that of the inductor, and determine R CP and C CP from (16) and (17), where L E and C E are
the equivalent inductance of output inductors and the equivalent capacitance of output capacitors respectively.
R CP (16)
C CP
10 L E C E
R CP
(17)
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 Voltage Droop 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 (18) and (19), where R LE is the equivalent resistance of inductor DCR.
2 S * C E G CS * R FB R LE
f C 1
R DRP
(18)
T C 1
90 A tan( 0 . 5 )
180
S
(19)
Choose the desired crossover frequency fc around fc1 estimated by (18) 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 (20), and determine C FB and C DRP from (21)
and (22).
Page 21 of 29
09/26/05
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相关代理商/技术参数 |
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|---|---|
| IR3094MTRPBF | 功能描述:开关变换器、稳压器与控制器 XPHASE VRD10 CTRL IC CTRL IC 200 to 700mV 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 |
| IR3094PBF | 制造商:IRF 制造商全称:International Rectifier 功能描述:3 PHASE PWM CONTROLLER FOR POINT OF LOAD |
| IR30BQ060TR | 制造商:International Rectifier 功能描述: |
| IR3101 | 功能描述:马达/运动/点火控制器和驱动器 Half-Bridge FredFET iMotion 1.6A 500V RoHS:否 制造商:STMicroelectronics 产品:Stepper Motor Controllers / Drivers 类型:2 Phase Stepper Motor Driver 工作电源电压:8 V to 45 V 电源电流:0.5 mA 工作温度:- 25 C to + 125 C 安装风格:SMD/SMT 封装 / 箱体:HTSSOP-28 封装:Tube |
| IR3101-EL | 制造商:International Rectifier 功能描述: |
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