参数资料
| 型号： | IR3084AMPBF |
| 厂商： | International Rectifier |
| 文件页数： | 20/45页 |
| 文件大小： | 0K |
| 描述： | IC XPHASE CONTROL 28-MLPQ |
| 标准包装： | 100 |
| 系列： | XPhase™ |
| 应用： | 处理器 |
| 电流 - 电源： | 14mA |
| 电源电压： | 9.5 V ~ 16 V |
| 工作温度： | 0°C ~ 100°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-MLPQ |
| 供应商设备封装： | 28-MLPQ（5x5） |
| 包装： | 剪切带 (CT) |
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IR3084A
Fault Modes
Under Voltage Lock Out, VID = FAULT, as well as a low signal on the ENABLE input immediately sets the fault
latch. This causes the EAOUT pin to drive low turning off the Phase IC drivers. The VRRDY pin also drives low.
The SS/DEL capacitor will discharge down to 0.215V through a 6.5uA current source. If the fault has cleared the
fault latch will be reset by the discharge comparator allowing a normal start-up sequence to occur. If a VID =
FAULT condition is latched it can only be cleared by cycling power to the IR3084A on and off.
Over ? Current Protection Delay and Hiccup Mode
Figure 11 depicts the operating waveforms of the Over-Current protection. A delay is included if an over-current
condition occurs after a successful soft start sequence. This is required because over-current conditions can
occur as part of normal operation due to load transients or VID transitions. If an over-current fault occurs during
normal operation it will activate the SS/DEL discharge current of 40uA but will not set the fault latch immediately.
If the over-current condition persists long enough for the SS/DEL capacitor to discharge below the 100mV offset
of the delay comparator, the Fault latch will be set pulling the error amp’s output low inhibiting switching in the
phase ICs and de-asserting the VRRDY signal.
The SS/DEL capacitor will continue to discharge until it reaches 0.215V and the fault latch is reset allowing a
normal soft start to occur. If an over-current condition is again encountered during the soft start cycle the fault
latch will be set without any delay and hiccup mode will begin. During hiccup mode the 10.8 to 1 charge to
discharge current ratio results in a 9% hiccup mode duty cycle regardless of at what point the over-current
condition occurs.
If the voltage at the SS/DEL pin is pulled below the SS/DEL to FB Input Offset Voltage (0.85V min), the converter
can be disabled.
SS/DEL
(3.85V DURING
NORMAL
OPERATION)
3.75V
1.3V
3.77V
DISCHARGE VOLTAGE
(0.215V)
VOUT
VRRDY
OCP THRESHOLD
IOUT
NORMAL
OPERATION
OCP
HICCUP MODE
OVER-CURRENT PROTECTION
RESTART
AFTER
OCP
NORMAL
OPERATION
DELAY
Figure 11 – Over-Current Protection Waveforms (VID = 1.1V for simplicity)
Page 20 of 45
3/3/2009
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相关代理商/技术参数 |
参数描述 |
|---|---|
| IR3084AMTRPBF | 功能描述:开关变换器、稳压器与控制器 VR10 VR11 Athlon64 XPHASE 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 |
| IR3084MPBF | 功能描述:IC XPHASE CONTROL 28-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 |
| IR3084MTRPBF | 功能描述:开关变换器、稳压器与控制器 VR10 VR11 Athlon64 XPHASE 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 |
| IR3084U | 制造商:IRF 制造商全称:International Rectifier 功能描述:XPHASETM VR10, VR11 & OPTERON/ATHLON64 CONTROL IC |
| IR3084UMPBF | 功能描述:IC XPHASE CONTROL 28-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 |
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