- 您现在的位置：买卖IC网 > PDF目录1809 > IR3505ZMTRPBF (International Rectifier)IC XPHASE3 CTLR 2.5A 16-MLPQ PDF资料下载
参数资料
| 型号： | IR3505ZMTRPBF |
| 厂商： | International Rectifier |
| 文件页数： | 8/20页 |
| 文件大小： | 0K |
| 描述： | IC XPHASE3 CTLR 2.5A 16-MLPQ |
| 标准包装： | 1 |
| 系列： | XPhase3™ |
| 应用： | 处理器 |
| 电流 - 电源： | 3mA |
| 电源电压： | 8 V ~ 16 V |
| 工作温度： | 0°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-MLPQ |
| 供应商设备封装： | 16-MLPQ（3x3） |
| 包装： | 标准包装 |
| 其它名称： | IR3505ZMTRPBFDKR |
IR3505Z
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 2 Four Phase Oscillator Waveforms
PWM Operation
The PWM comparator is located in the phase IC. Upon receiving the falling edge of a clock pulse, the PWM latch is
set; the PWM ramp 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 PWM ramp voltage exceeds the error amplifier’s output voltage the PWM latch
is reset. This turns off the high side driver, turns on the low side driver after the non-overlap time, and activates the
ramp discharge clamp. The clamp drives the PWM ramp voltage to the level set by the share adjust amplifier 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.
An additional advantage of this PWM modulator is that differences in ground or input voltage at the phases have no
effect on operation since the PWM ramps are referenced to VDAC.
Figure 3 depicts PWM operating waveforms under various conditions.
Page 8 of 20
March 17, 2009
相关PDF资料 |
PDF描述 |
|---|---|
| IR3506MTRPBF | IC CTRL XPHASE3 DDR 16-MLPQ |
| IR3507MTRPBF | IC XPHASE3 CONTROL 20-MLPQ |
| IR3507ZMTRPBF | IC CTRL XPHASE3 20-MLPQ |
| IR3508MTRPBF | IC XPHASE3 CTLR 20-MLPQ |
| IR3508ZMTRPBF | IC CTRL XPHASE3 20MLPQ |
相关代理商/技术参数 |
参数描述 |
|---|---|
| IR3506 | 制造商:IRF 制造商全称:International Rectifier 功能描述:XPHASE3TM DDR & VTT PHASE IC |
| IR3506MTRPBF | 功能描述:开关变换器、稳压器与控制器 XPHASE3 DDR VTT 7V 2A 3 Wire 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 |
| IR3507 | 制造商:IRF 制造商全称:International Rectifier 功能描述:XPHASE3TM PHASE IC |
| IR3507MPBF | 制造商:International Rectifier 功能描述: |
| IR3507MTRPBF | 功能描述:开关变换器、稳压器与控制器 XPHASE3 DDR VTT 7V 2A 3 Wire 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 |
发布紧急采购，3分钟左右您将得到回复。