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参数资料
| 型号： | IR3088AM |
| 厂商： | International Rectifier |
| 英文描述： | XPHASETM PHASE IC WITH FAULT AND OVERTEMP DETECT |
| 中文描述： | XPHASETM相集成电路及超温故障检测 |
| 文件页数： | 7/34页 |
| 文件大小： | 1264K |
| 代理商： | IR3088AM |
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IR3088A
PWM Control Method
The PWM block diagram of the
XPhase
TM
architecture is shown in Figure 2. Feed-forward voltage mode control with
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 the wire and PCB-trace voltage drop related to changes in
load current.
+
-
10K
+
-
SHARE
ADJUST
ERROR
AMPLIFIER
CURRENT
SENSE
AMPLIFIER
X34
X
0.91
20mV
+
-
+
-
+
-
10K
SHARE
ADJUST
ERROR
AMPLIFIER
CURRENT
SENSE
AMPLIFIER
X34
20mV
X
0.91
+
-
+
-
+
-
+
-
+
-
DACIN
PWMRMP
BIASIN
RAMPIN-
RAMPIN+
GATEH
SCOMP
ISHARE
CSIN+
GATEL
EAIN
CSIN-
SYSTEM
REFERENCE
VOLTAGE
ENABLE
CLOCK
PULSE
GENERATOR
BODY
BRAKING
COMPARATOR
RAMP
DISCHARGE
CLAMP
PWM
LATCH
S
RESET
DOMINANT
PHASE IC
R
PWM
COMPARATOR
RDRP
RPWMRMP
RPHS2
CSCOMP
+
-
RPHS1
+
-
+
-
RCS
RVFB
+
-
CPWMRMP
CSCOMP
CCS
RPWMRMP
RCS
+
-
CPWMRMP
+
-
+
-
CCS
RPHS2
RPHS1
+
-
GND
VOUT
BIASIN
VDAC
VBIAS
DACIN
PWMRMP
RAMPIN+
VOSNS-
VOSNS+
VOSNS-
ISHARE
RAMPIN-
IIN
VDRP
EAIN
GATEH
SCOMP
CSIN-
CSIN+
GATEL
EAOUT
RMPOUT
VIN
FB
IROSC
SYSTEM
REFERENCE
VOLTAGE
VDAC
BODY
BRAKING
COMPARATOR
RAMP
DISCHARGE
CLAMP
ENABLE
CLOCK
PULSE
GENERATOR
VBIAS
REGULATOR
IFB
VDRP
AMP
50%
DUTY
CYCLE
RAMP GENERATOR
VVALLEY
VPEAK
ERROR
AMP
R
S
RESET
DOMINANT
PWM
LATCH
PHASE IC
COUT
CONTROL IC
PWM
COMPARATOR
Figure 2. PWM Block Diagram
Frequency and Phase Timing Control
An oscillator with programmable frequency is located in the Control IC. The output of the oscillator is a 50% duty
cycle triangle waveform with peak and valley voltages of approximately 5V and 1V respectively. 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 R
PHS1
and R
PHS2
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 over 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 3 shows the Phase timing for an 8 phase converter. Note
that both slopes of the triangle waveform can be used for phase timing by swapping the RMPIN+ and RMPIN– pins,
as shown in Figure 2.
Page 7 of 34
9/30
/04
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相关代理商/技术参数 |
参数描述 |
|---|---|
| IR3088AMPBF | 功能描述:IC XPHASE CONTROL 20L-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 |
| IR3088AMTR | 功能描述:IC XPHASE W/FAULT DET 20L-MLPQ RoHS:否 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 |
| IR3088AMTRPBF | 功能描述:开关变换器、稳压器与控制器 XPHASE IC W/ FAULT OVERTEMP DETECT 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 |
| IR3088APBF | 制造商:IRF 制造商全称:International Rectifier 功能描述:XPHASETM PHASE IC WITH FAULT AND OVERTEMP DETECT |
| IR3088M | 功能描述:IC XPHASE W/FAULT DET 20L-MLPQ RoHS:否 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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