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| 型号： | IR3082AMPBF |
| 厂商： | International Rectifier |
| 文件页数： | 20/33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
VDAC Slew Rate Programming Capacitor C VDAC and Resistor R VDAC
The slew rate of VDAC down-slope SR DOWN can be programmed by the external capacitor C VDAC as defined in
Equation (7), where I SINK is the sink current of VDAC pin as shown in Figure 15. The resistor R VDAC is used to
compensate VDAC circuit and is determined by Equation (8). The slew rate of VDAC up-slope SR UP is proportional
to that of VDAC down-slope and is given by Equation (9), where I SOURCE is the source current of VDAC pin as
shown in Figure15.
C VDAC
I SINK
SR DOWN
(7)
C VDAC
R VDAC
0 . 5
3 . 2 ? 10 15
2
(8)
SR UP
I SOURCE
C VDAC
(9)
Over Current Setting Resistor R OCSET
The inductor DC resistance is utilized to sense the inductor current. The copper wire of inductor has a constant
temperature coefficient of 3850 PPM, and therefore the maximum inductor DCR can be calculated from Equation
(10), where R L_MAX and R L_ROOM are the inductor DCR at maximum temperature T L_MAX and room temperature
T_ ROOM respectively.
R L _ MAX
R L _ ROOM ? [ 1 3850 ? 10
6
? ( T L _ MAX T ROOM )]
(10)
The current sense amplifier gain of IR3086A decreases with temperature at the rate of 1470 PPM, which
compensates part of the inductor DCR increase. The phase IC die temperature is only a couple of degrees Celsius
higher than the PCB temperature due to the low thermal impedance of MLPQ package. The minimum current sense
amplifier gain at the maximum phase IC temperature T IC_MAX is calculated from Equation (11).
G CS _ MIN
G CS _ ROOM ? [ 1 1470 ? 10 6 ? ( T IC _ MAX T ROOM )]
(11)
The total input offset voltage (V CS_TOFST ) of current sense amplifier in phase ICs is the sum of input offset
(V CS_OFST) of the amplifier itself and that created by the amplifier input bias currents flowing through the current
sense resistors R CS+ and R CS- .
V CS _ TOFST
V CS _ OFST I CSIN ? R CS I CSIN ? R CS
(12)
The over current limit is set by the external resistor R OCSET as defined in Equation (13), where I LIMIT is the required
over current limit. I OCSET, the bias current of OCSET pin, changes with switching frequency setting resistor R OSC
and is determined by the curve in Figure 14. K P is the ratio of inductor peak current over average current in each
phase and is calculated from Equation (14).
R OCSET
[
I LIMIT
n
? R L _ MAX ? ( 1 K P ) V CS _ TOFST ] ? G CS _ MIN / I OCSET
(13)
K P
Page 20 of 33
( V I V O ) ? V O /( L ? V I ? f SW ? 2 )
I O / n
(14)
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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