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| 型号： | IR3082AMTRPBF |
| 厂商： | International Rectifier |
| 文件页数： | 7/33页 |
| 文件大小： | 0K |
| 描述： | IC XPHASE CONTROL 9.6V 20-MLPQ |
| 标准包装： | 1 |
| 系列： | XPhase™ |
| 应用： | 处理器 |
| 电流 - 电源： | 12mA |
| 电源电压： | 8.05 V ~ 16 V |
| 工作温度： | 0°C ~ 100°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-MLPQ |
| 供应商设备封装： | 20-MLPQ（5x5） |
| 包装： | 标准包装 |
| 产品目录页面： | 1381 (CN2011-ZH PDF) |
| 其它名称： | IR3082AMTRPBFDKR |
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The PWM block diagram of the XPhase
architecture is shown in Figure 3. Feed-forward voltage mode control with
IR3082A
PWM Control Method
TM
trailing edge modulation is used. A high-gain wide-bandwidth voltage type error amplifier in the Control IC is used
for the voltage control loop. An external RC circuit connected to the input voltage and ground is used to program the
slope of the PWM ramp and to provide the feed-forward control at each phase. The PWM ramp slope will change
with the input voltage and automatically compensate for changes in the input voltage. The input voltage can change
due to variations in the silver box output voltage or due to drops in the PCB related to changes in load current.
VIN
CONTROL IC
SYSTEM
PHASE IC
50%
DUTY
CYCLE
RAMP GENERATOR
VPEAK
VVALLEY
RMPOUT
RPHS1
BIASIN
RAMPIN+
RAMPIN-
REFERENCE
VOLTAGE
CLOCK
PULSE
GENERATOR
PWM
COMPARATOR
PWM
LATCH
S
RESET
DOMINANT
GATEH
VOSNS+
VOUT
+
-
VBIAS
REGULATOR
VDAC
VBIAS
VDAC
VOSNS-
EAOUT
RPHS2
RPWMRMP
CPWMRMP
EAIN
PWMRMP
SCOMP
CSCOMP
RAMP
SLOPE
ADJUST
SHARE
ADJUST
-
+
ENABLE
RAMP
DISCHARGE
CLAMP
R
BODY
BRAKING
COMPARATOR
GATEL
COUT
GND
VOSNS-
ERROR
AMP
RVFB
ERROR
AMP
X 0.9
IFB
IROSC
FB
RDRP
ISHARE
10K
+
-
20mV
+
+
CURRENT
SENSE
AMPLIFIER
X34
CSIN+
CSIN-
CCS
RCS
VDRP
AMP
VDRP
IIN
DACIN
SYSTEM
PHASE IC
BIASIN
REFERENCE
VOLTAGE
PWM
RPHS1
RAMPIN+
RAMPIN-
EAIN
CLOCK
PULSE
GENERATOR
PWM
COMPARATOR
-
+
LATCH
S
RESET
DOMINANT
R
GATEH
GATEL
RPHS2
RPWMRMP
CPWMRMP
PWMRMP
SCOMP
RAMP
SLOPE
ADJUST
ENABLE
RAMP
DISCHARGE
CLAMP
BODY
BRAKING
COMPARATOR
CSCOMP
SHARE
ADJUST
ERROR
AMP
X 0.9
ISHARE
10K
+
-
20mV
CURRENT
SENSE
AMPLIFIER
CSIN+
CCS
RCS
+
+
X34
CSIN-
DACIN
Figure 3 – IR3082A PWM Block Diagram
Frequency and Phase Timing Control
The oscillator is located in the Control IC and its frequency is programmable from 150kHz to 1MHZ by an external
resistor. The output of the oscillator is a 50% duty cycle triangle waveform with peak and valley voltages of
approximately 5V and 1V. This signal is used to program both the switching frequency and phase timing of the
Phase ICs. The Phase IC is programmed by resistor divider RRAMP1 and RRAMP2 connected between the VBIAS
reference voltage and the Phase IC LGND pin. A comparator in the Phase ICs detects the crossing of the oscillator
waveform with the voltage generated by the resistor divider and triggers a clock pulse that starts the PWM cycle.
The peak and valley voltages track the VBIAS voltage reducing potential Phase IC timing errors. Figure 4 shows the
Phase timing for an 8 phase converter. Note that both slopes of the triangle waveform can be used for
synchronization by swapping the RAMP+ and RAMP- pins, as shown in Figure 3.
Page 7 of 33
05/02/2006
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相关代理商/技术参数 |
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|---|---|
| IR3082M | 制造商:IRF 制造商全称:International Rectifier 功能描述:XPHASE AMD OPTERON/ATHLON 64 CONTROL IC |
| IR3082MPBF | 功能描述:IC XPHASE CONTROL 20-MLPQ 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 |
| IR3082MPBF | 制造商:International Rectifier 功能描述:Controller IC Package/Case:20-MLPQ |
| IR3082MTR | 制造商:IRF 制造商全称:International Rectifier 功能描述:XPHASE AMD OPTERON/ATHLON 64 CONTROL IC |
| IR3082MTRPBF | 功能描述:IC CTLR XPHASE 20-MLPQ 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 |
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