- 您现在的位置：买卖IC网 > PDF目录1808 > IR3087MPBF (International Rectifier)IC XPHASE W/OVP/TM CTRL 20MLPQ PDF资料下载
参数资料
| 型号： | IR3087MPBF |
| 厂商： | International Rectifier |
| 文件页数： | 9/35页 |
| 文件大小： | 0K |
| 描述： | IC XPHASE W/OVP/TM CTRL 20MLPQ |
| 标准包装： | 5 |
| 系列： | XPhase™ |
| 应用： | 处理器 |
| 电流 - 电源： | 10mA |
| 电源电压： | 8.4 V ~ 21 V |
| 工作温度： | 0°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-MLPQ |
| 供应商设备封装： | 20-MLPQ（4x4） |
| 包装： | 剪切带 (CT) |
第1页第2页第3页第4页第5页第6页第7页第8页当前第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页
IR3087PBF
50% RAMP
DUTY CYCLE
SLOPE = 80mV / % DC
VPEAK (5.0V)
VPHASE4&5 (4.5V)
SLOPE = 1.6mV / ns @ 200kHz
SLOPE = 8.0mV / ns @ 1MHz
VPHASE3&6 (3.5V)
VPHASE2&7 (2.5V)
VPHASE1&8 (1.5V)
VVALLEY (1.00V)
CLK1
CLK2
CLK3
CLK4
CLK5
CLK6
CLK7
CLK8
Figure 3. 8 Phase Oscillator Waveforms
PWM Operation
The PWM comparator is located in the Phase IC. Upon receiving 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 then 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; it activates the
Ramp Discharge Clamp, which quickly discharges the PWMRMP capacitor to the VDAC voltage of the Control 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 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.
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 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 4 depicts PWM operating waveforms under various conditions.
Page 9 of 35
1 /31/05
相关PDF资料 |
PDF描述 |
|---|---|
| IR3087M | IC XPHASE W/OVP/TM CTRL 20-MLPQ |
| IR3088AMPBF | IC XPHASE CONTROL 20L-MLPQ |
| IR3088AMTR | IC XPHASE W/FAULT DET 20L-MLPQ |
| IR3088MTRPBF | IC CTLR XPHASE 28-MLPQ |
| IR3092MTRPBF | IC CONTROLLER 2PHASE 48-MLPQ |
相关代理商/技术参数 |
参数描述 |
|---|---|
| IR3087MTR | 功能描述:IC XPHASE W/OVP/TM CTRL 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 |
| IR3087MTRPBF | 功能描述:IC CONTROLLER PHASE 20MLPQ 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 |
| IR3087PBF | 制造商:IRF 制造商全称:International Rectifier 功能描述:XPHASETM PHASE IC WITH OPTI-PHASETM, OVP, AND OVERTEMP DETECT |
| IR3088 | 制造商:IRF 制造商全称:International Rectifier 功能描述:XPHASE PHASE IC WITH FAULT AND OVERTEMP DETECT |
| IR3088A | 制造商:IRF 制造商全称:International Rectifier 功能描述:XPHASETM PHASE IC WITH FAULT AND OVERTEMP DETECT |
发布紧急采购，3分钟左右您将得到回复。