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参数资料
| 型号： | IR3502AMTRPBF |
| 厂商： | International Rectifier |
| 文件页数： | 10/38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
connected to the phase clock input PHSIN of the first phase IC, and PHSOUT of the first phase IC is connected to
PHSIN of the second phase IC, etc. The PHSOUT of the last phase IC is connected back to PHSIN of the control IC.
During power up, the control IC sends out clock signals from both CLKOUT and PHSOUT pins and detects the
feedback at PHSIN pin to determine the phase number and monitor any fault in the daisy chain loop. Figure 4 shows
the phase timing for a four phase converter. The switching frequency is set by the resistor ROSC. The clock frequency
equals the number of phase times the switching frequency.
Control IC CLKOUT
(Phase IC CLKIN)
Control IC PHSOUT
(Phase IC1 PHSIN)
Phase IC1
PWM Latch SET
Phase IC 1 PHSOUT
(Phase IC2 PHSIN)
Phase IC 2 PHSOUT
(Phase IC3 PHSIN)
Phase IC 3 PHSOUT
(Phase IC4 PHSIN)
Phase IC4 PHSOUT
(Control IC PHSIN)
Figure 4 Four Phase Oscillator Waveforms
PWM Operation
The PWM comparator is located in the phase IC. With the PHSIN voltage high, upon receiving the falling edge of 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 turned on after the non-overlap time. When the PWMRMP voltage exceeds the error amplifier’s
output voltage, the PWM latch is reset. This turns off the high side driver and then turns on the low side driver after the
non-overlap time. Along with that, it activates the ramp discharge clamp, which quickly discharges the PWMRMP
capacitor to the output voltage of share adjust amplifier in phase 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 up to 100% duty cycle in response to a load step
increase with turn-on gated by the clock pulses. An error amplifier 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 amplifier 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. The error
amplifier is a high speed amplifier with wide bandwidth and fast slew rate incorporated in the control IC. It is not unity
gain stable.
This control method is designed to provide “single cycle transient response,” where the inductor current changes in
response to load transients within a single switching cycle maximizing the effectiveness of the power train and
minimizing the output capacitor requirements. An additional advantage of the architecture is that differences in the
ground or input voltage at the phases have no effect on operation since the PWM ramps are referenced to VDAC.
Figure 5 depicts PWM operating waveforms under various conditions.
Page 10 of 38
December 17, 2009
相关PDF资料 |
PDF描述 |
|---|---|
| IR3502BMTRPBF | IC REG XPH INTEL VR11.1 32-MLPQ |
| IR3502MTRPBF | IC XPHASE3 CONTROLLER 32-MLPQ |
| IR3503MTRPBF | IC CTRL XPHASE VR11.0/1 32-MLPQ |
| IR3504MTRPBF | IC CTRL XPHASE3 SVID 32-MLPQ |
| IR3505MPBF | IC XPHASE3 CONTROL 16-MLPQ |
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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