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| 型号： | IR3082AMPBF |
| 厂商： | International Rectifier |
| 文件页数： | 19/33页 |
| 文件大小： | 0K |
| 描述： | IC XPHASE CONTROL 9.6V 20-MLPQ |
| 标准包装： | 100 |
| 系列： | XPhase™ |
| 应用： | 处理器 |
| 电流 - 电源： | 12mA |
| 电源电压： | 8.05 V ~ 16 V |
| 工作温度： | 0°C ~ 100°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-MLPQ |
| 供应商设备封装： | 20-MLPQ（5x5） |
| 包装： | 剪切带 (CT) |
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IR3082A
DESIGN PROCEDURES – IR3082A AND IR3086A CHIPSET
IR3082A EXTERNAL COMPONENTS
Oscillator Resistor Rosc
The oscillator of IR3082A generates a triangle waveform to synchronize the phase ICs, and the switching frequency
of the each phase converter equals the oscillator frequency, which is set by the external resistor R OSC according to
the curve in Figure 13.
Soft Start Capacitor C SS/DEL and Resistor R SS/DEL
Because the capacitor C SS/DEL programs three different time parameters, i.e. soft start time, over current latch
delay time, and the frequency of hiccup mode, they should be considered together while choosing C SS/DEL .
The SS/DEL pin voltage controls the slew rate of the converter output voltage, as shown in Figure 10. After the
ENABLE pin voltage rises above 1.27V, there is a soft-start delay time t SSDEL, after which the error amplifier output
is released to allow the soft start. The soft start time t SS represents the time during which the output voltage rises
from zero to Vo. t SS can be programmed by an external capacitor, which is determined by Equation (1).
C SS / DEL
I CHG ? t SS
V O
55 ? 10 6 ? t SS
V O
(1)
Once C SS/DEL is chosen, the soft start delay time t SSDEL , the over-current fault latch delay time t OCDEL, and the
delay time t VccPG from output voltage (Vo) in regulation to Power Good are fixed and shown in Equations (2), (3), (4)
and (5) respectively.
t SSDEL
t OCDEL
C SS / DEL ? 1. 3
I CHG
C SS / DEL ? 0. 11
I DISCHG
C SS / DEL ? 1. 3
55 ? 10 6
C SS / DEL ? 0. 11
5 ? 10 6
(2)
(3)
t VccPG
C SS / DEL ? (3. 83 . V O 1 .3)
I CHG
C SS / DEL ? (3. 83 V O 1 .3)
55 ? 10 6
(4)
The hiccup mode duty cycle of over current protection is determined by the charge current I CHG and discharge
current I DISCHG of C SS/DEL and is fixed at 9%. However, the hiccup frequency is determined by the load current and
over-current set value.
Page 19 of 33
05/02/2006
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相关代理商/技术参数 |
参数描述 |
|---|---|
| IR3082AMTRPBF | 功能描述:开关变换器、稳压器与控制器 9.6V 5Bit VID 300mV 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 |
| IR3082M | 制造商:IRF 制造商全称:International Rectifier 功能描述:XPHASE AMD OPTERON/ATHLON 64 CONTROL IC |
| IR3082MPBF | 功能描述:IC XPHASE CONTROL 20-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 |
| IR3082MPBF | 制造商:International Rectifier 功能描述:Controller IC Package/Case:20-MLPQ |
| IR3082MTR | 制造商:IRF 制造商全称:International Rectifier 功能描述:XPHASE AMD OPTERON/ATHLON 64 CONTROL IC |
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