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| 型号： | IR3502AMTRPBF |
| 厂商： | International Rectifier |
| 文件页数： | 9/38页 |
| 文件大小： | 0K |
| 描述： | IC XPHASE CTRL VR11.0/1 32-MLPQ |
| 标准包装： | 1 |
| 系列： | XPhase3™ |
| 应用： | 处理器 |
| 电流 - 电源： | 8mA |
| 电源电压： | 8 V ~ 16 V |
| 工作温度： | 0°C ~ 100°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 32-VFQFN 裸露焊盘 |
| 供应商设备封装： | 32-MLPQ（5x5） |
| 包装： | 标准包装 |
| 其它名称： | IR3502AMTRPBFDKR |
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IR3502A
SYSTEM THEORY OF OPERATION
System Description
The system consists of one control IC and a scalable array of phase converters, each requiring one phase IC. The
control IC communicates with the phase ICs using three digital buses, i.e., CLOCK, PHSIN, PHSOUT and three analog
buses, i.e., VDAC, EA, IIN. The digital buses are responsible for switching frequency determination and accurate
phase timing control without any external component. The analog buses are used for PWM control and current sharing
among interleaved phases. The control IC incorporates all the system functions, i.e., VID, CLOCK signals, error
amplifier, fault protections, current monitor, etc. The Phase IC implements the functions required by each phase of the
converter, i.e., the gate drivers, PWM comparator and latch, over-voltage protection, Phase disable circuit, current
sensing and sharing, etc.
CONTROL IC
GATE DRIVE
VOLTAGE
PHSOUT
VIN
PHASE IC
VCC
CLOCK GENERATOR
CLKOUT
CLKIN
CLK Q
D
VCCH
PHSOUT
PHSIN
PHSIN
PWM
1
2
RESET
U246
DOMINANT
D Q
CLK Q
VID6
OFF
GATEH
SW
CBST
VOSNS+
VOUT
REMOTE SENSE
AMPLIFIER
EAIN
COMPARATOR
-
+
ENABLE
VID6
DFFRH
PWM LATCH
BODY
BRAKING
VID6
VCCL
GATEL
PGND
COUT
GND
VOSNS-
VO
RAMP
DISCHARGE
COMPARATOR
OFF
CLAMP
VDAC
LGND
SHARE ADJUST
ERROR AMPLIFIER
PSI
PSI
VDAC
ERROR
AMPLIFIER
EAOUT
CEA1
CEA
RFB1
RFB
ISHARE
3K
-
VID6
VID6
+
VID6
VID6 +
CURRENT
SENSE
AMPLIFIER
CSIN+
CCS
RCS
REA
+
CSIN-
FB
RVSETPT
CFB1
DACIN
PHSOUT
IVSETPT
IROSC
VSETPT
IMON
RDRP
CLKIN
CLK Q
PHASE IC
VCC
VDRP
AMP
VDAC
Thermal
Compensation
VDRP
VN
RTHERM
RTCMP1
RTCMP2
PHSIN
EAIN
D
1
PWM
COMPARATOR
-
+
2
RESET
U248
DOMINANT
D Q
CLK Q
DFFRH
PWM LATCH
VID6
OFF
VCCH
GATEH
SW
VCCL
CBST
VDAC_BUFF
ENABLE
IIN
RTCMP3
VID6
RAMP
DISCHARGE
BODY
BRAKING
COMPARATOR
VID6
GATEL
PGND
CLAMP
OFF
SHARE ADJUST
ERROR AMPLIFIER
CURRENT
PSI
PSI
ISHARE
3K
-
VID6
VID6
+
SENSE
AMPLIFIER
CSIN+
VID6
DACIN
VID6 +
+
CSIN-
CCS
RCS
Figure 3 System Block Diagram
PWM Control Method
The PWM block diagram of the XPhase3 TM architecture is shown in Figure 3. 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. Input voltage is sensed in phase ICs and feed-forward control is realized. 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.
Frequency and Phase Timing Control
The oscillator is located in the control IC and the system clock frequency is programmable from 250kHz to 9MHZ by an
external resistor. The control IC system clock signal CLKOUT is connected to CLKIN of all the phase ICs. The phase
timing of the phase ICs is controlled by the daisy chain loop, where control IC phase clock output PHSOUT is
Page 9 of 38 December 17, 2009
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相关代理商/技术参数 |
参数描述 |
|---|---|
| IR3502B | 制造商:IRF 制造商全称:International Rectifier 功能描述:XPHASE3TM CONTROL IC |
| IR3502BMTRPBF | 功能描述:开关变换器、稳压器与控制器 X-PHASE CONTROL IC AMD SVID CTRL IC 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 |
| IR3502MPBF | 制造商:International Rectifier 功能描述:IR3502 Series 16 V 1.65 MHz Surface Mount XPHASE3TM Control IC- MLPQ-32 制造商:IR 功能描述:IR3502 Series 16 V 1.65 MHz Surface Mount XPHASE3TM Control IC- MLPQ-32 |
| IR3502MPBFTR | 制造商:IRF 制造商全称:International Rectifier 功能描述:XPHASE3TM CONTROL IC |
| IR3502MTRPBF | 功能描述:开关变换器、稳压器与控制器 COMPLETE VR11.0 OR VR11.1 PWR SOLUTION 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 |
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