参数资料
| 型号： | IR3084UMPBF |
| 厂商： | International Rectifier |
| 文件页数： | 22/47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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IR3084U
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 which turns off the Phase IC drivers. The VRRDY pin also drives
low. The SS/DEL capacitor will discharge down to 0.215V through a 6.5μA current source. If the fault has cleared
when SS/DEL falls to 0.215V then 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
IR3084U on and off.
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 OVER-CURRENT
PROTECTION
RESTART
AFTER
OCP
NORMAL
OPERATION
DELAY
Figure 11 – Over-Current Protection Waveforms (VID = 1.1V for simplicity)
Over-Current Protection Delay and Hiccup Mode
Figure 11 depicts the operating waveforms of the Over Current Protection (OCP). A delay is included if an over-
current condition occurs after a successful soft start sequence. This delay 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 over-current discharge current of 40μA 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 Se, the error amp’s output will be pulled low,
switching in the phase ICs will be inhibited, and the VRRDY signal will be de-asserted.
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 11.2 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 SS/DEL pin is pulled below 0.85V, the converter can be disabled.
Page 22 of 47
June 1, 2009
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相关代理商/技术参数 |
参数描述 |
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| IR3084UMTRPBF | 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 |
| IR3086 | 制造商:IRF 制造商全称:International Rectifier 功能描述:PHASE IC WITH OVP, FAULT AND OVERTEMP DETECT |
| IR3086A | 制造商:IRF 制造商全称:International Rectifier 功能描述:XPHASETM PHASE IC WITH OVP, FAULT AND OVERTEMP DETECT |
| IR3086AM | 制造商:IRF 制造商全称:International Rectifier 功能描述:XPHASETM PHASE IC WITH OVP, FAULT AND OVERTEMP DETECT |
| IR3086AMPBF | 功能描述:IC PHASE CONTROLLER OVP 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 |
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