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参数资料
| 型号： | IR3094MTRPBF |
| 厂商： | International Rectifier |
| 文件页数： | 12/29页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM VM 48MLPQ |
| 产品变化通告： | (EP) Parts Discontinuation 25/May/2012 |
| 标准包装： | 1 |
| 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： | 标准包装 |
| 产品目录页面： | 1381 (CN2011-ZH PDF) |
| 其它名称： | IR3094MPBFDKR |
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IR3094PBF
50% INTERNAL OSCILLATOR RAMP
DUTY CYCLE
CLK1
CLK2
CLK3
RAMP3 MIN DUTY
CYCLE ADJUST
RAMP3 MAX DUTY
CYCLE ADJUST
EAOUT
RAMP3
FIXED RAMP1
RAMP2
0.6V
RAMP1 SLOPE = 50mV / % DC
THE SHARE ADJUST ERROR AMPLIFIER CAN
CHANGE THE PULSE WIDTH OF RAMPS 2 & 3 FROM
0.5 x RAMP1 TO 2.0 X RAMP1 TO FORCE
CURRENT SHARING.
Figure 3 – 3 Phase Oscillator and PWM Waveforms
The RSFF is reset dominant allowing both phases to go to zero duty cycle within a few tens of nanoseconds in
response to a load step decrease. Phases can overlap and go to 100% duty cycle in response to a load step
increase with turn-on gated by the clock pulses. An Error Amplifier output voltage greater than the common mode
input range of the PWM comparator results in 100% duty cycle regardless of the voltage of the PWM ramp. This
arrangement guarantees the Error Amplifier is always in control and can demand 0 to 100% duty cycle as required.
It also favors response to a load step decrease which is appropriate given the low output to input voltage ratio of
most systems. The inductor current will increase much more rapidly than decrease in response to load transients.
This control method is designed to provide “single cycle transient response” where the inductor current changes in
response to load transients within a single switching cycle maximizing the effectiveness of the power train and
minimizing the output capacitor requirements.
Body Braking
TM
In a conventional synchronous buck converter, the minimum time required to reduce the current in the inductor in
response to a load step decrease is;
T SLEW = [L x (I MAX - I MIN )] / Vout
(1)
The slew rate of the inductor current can be significantly increased by turning off the synchronous rectifier in
response to a load step decrease. The switch node voltage is then forced to decrease until conduction of the
synchronous rectifier’s body diode occurs. This increases the voltage across the inductor from Vout to Vout + V BODY
DIODE . The minimum time required to reduce the current in the inductor in response to a load transient decrease is
now;
Page 12 of 29
T SLEW = [L x (I MAX - I MIN )] / (Vout + V BODY DIODE )
(2)
09/26/05
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 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: |
| IR3103 | 功能描述:马达/运动/点火控制器和驱动器 Half-Bridge FredFET iMotion 0.75A 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 |
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