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参数资料
| 型号： | IR3081 |
| 厂商： | International Rectifier |
| 英文描述： | XPHASE VR 10.0 CONTROL IC |
| 中文描述： | XPHASE村10.0控制IC |
| 文件页数： | 8/20页 |
| 文件大小： | 396K |
| 代理商： | IR3081 |
IR3081
Page 8 of 20
9/1/03
R
C
CLK1
VVALLEY (1.00V)
P
VPHASE1&8 (1.5V)
VPHASE3&6 (3.5V)
VPHASE2&7 (2.5V)
VPHASE4&5 (4.5V)
VPEAK (5.0V)
CLK2
50% RAMP
CLK3
CLK4
CLK5
CLK6
CLK7
CLK8
SLOPE = 80mV / % DC
SLOPE = 1.6mV / ns @ 200kHz
SLOPE = 8.0mV / ns @ 1MHz
Figure 3 – 8 Phase Oscillator Waveforms
PWM Operation
The PWM comparator is located in the Phase IC. Upon receiving a clock pulse, the PWM latch is set, the PWMRMP
voltage begins to increase, the low side driver is turned off, and the high side driver is then turned on. When the
PWMRMP voltage exceeds the Error Amp’s output voltage the PWM latch is reset. This turns off the high side
driver, turns on the low side driver, and activates the Ramp Discharge Clamp. The clamp quickly discharges the
PWMRMP capacitor to the VDAC voltage of the Control IC until the next clock pulse.
The PWM latch is reset dominant allowing all 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 Amp 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 Amp 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.
相关PDF资料 |
PDF描述 |
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| IR3081M | XPHASE VR 10.0 CONTROL IC |
| IR3081MTR | XPHASE VR 10.0 CONTROL IC |
| IR3088A | XPHASETM PHASE IC WITH FAULT AND OVERTEMP DETECT |
| IR3088AM | XPHASETM PHASE IC WITH FAULT AND OVERTEMP DETECT |
| IR3088AMTR | XPHASETM PHASE IC WITH FAULT AND OVERTEMP DETECT |
相关代理商/技术参数 |
参数描述 |
|---|---|
| IR3081A | 制造商:IRF 制造商全称:International Rectifier 功能描述:XPHASETM VR 10 CONTROL IC |
| IR3081AM | 制造商:IRF 制造商全称:International Rectifier 功能描述:XPHASETM VR 10 CONTROL IC |
| IR3081AMPBF | 功能描述:IC CTRLR XPHASE VR10.0 28MLPQ RoHS:是 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 |
| IR3081AMPBF | 制造商:International Rectifier 功能描述:Controller IC Package/Case:28-MLPQ |
| IR3081AMTR | 制造商:IRF 制造商全称:International Rectifier 功能描述:XPHASETM VR 10 CONTROL IC |
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