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参数资料
| 型号： | IR3094MPBF |
| 厂商： | International Rectifier |
| 文件页数： | 13/29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
Since the voltage drop in the body diode is often higher than output voltage, the inductor current slew rate can be
increased by 2X or more. This patent pending technique is referred to as “body braking” and is accomplished
through the “0% Duty Cycle Comparator”. If the Error Amplifier’s output voltage drops below 0.575V, this
comparator turns off the low side gate driver.
Figure 4 depicts PWM operating waveforms under various conditions
CLK1
PULSE
EAOUT
PWM
Ramp1
GATEH1
GATEL1
0.6V
0.575V
STEADY-STATE
OPERATION
DUTY CYCLE INCREASE
DUE TO LOAD
DUTY CYCLE DECREASE DUE TO LOAD
DECREASE (BODY BRAKING) OR FAULT
STEADY-STATE
OPERATION
INCREASE
Figure 4 – PWM Operating Waveforms
Current Sense Amplifier
A high speed differential current sense amplifier is shown in Figure 5. Its gain decreases with increasing
temperature and is nominally 24 at 25oC and 20.9 at 125oC (-1400 ppm/oC). This reduction of gain tends to
compensate the 3850 ppm/oC increase in inductor DCR. Since in most designs the IR3094 IC junction is hotter than
the inductors these two effects tend to cancel such that no additional temperature compensation of the load line is
required.
The current sense amplifier can accept positive differential input up to 75mV and negative up to -25mV before
clipping. The output of the current sense amplifier is summed with the VREF voltage which is used for over current
protection, voltage positioning and current sharing.
v L
CO
i L
CSA
L
R s
R L
C s
v c
V o
C o
Figure 5 – Inductor Current Sensing and Current Sense Amplifier
Page 13 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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