参数资料
| 型号： | IR3081MPBF |
| 厂商： | International Rectifier |
| 文件页数： | 19/40页 |
| 文件大小： | 0K |
| 描述： | IC PHASE CONTROLLER 28MLPQ |
| 标准包装： | 100 |
| 系列： | XPhase™ |
| 应用： | 处理器 |
| 电流 - 电源： | 11mA |
| 电源电压： | 9.5 V ~ 14 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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IR3081PBF
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)
R VDAC = 0 . 5 +
3 . 2 ? 10 ? 15
C VDAC 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/°C, 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 IR3086 decreases with temperature at the rate of 1470 ppm/°C, 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 =
( V I ? V O ) ? V O /( L ? V I ? f SW ? 2)
I O / n
(14)
No Load Output Voltage Setting Resistor R FB and Adaptive Voltage Positioning Resistor R DRP
A resistor between FB pin and the converter output is used to create output voltage offset V O_NLOFST, which is the
difference between V DAC voltage and output voltage at no load condition. Adaptive voltage positioning further
lowers the converter voltage by R O *I O, where R O is the required output impedance of the converter.
R FB is not only determined by I FB , the current flowing out of FB pin as shown in Figure 14, but also affected by the
adaptive voltage positioning resistor R DRP and total input offset voltage of current sense amplifiers. R FB and R DRP
are determined by (15) and (16) respectively.
Page 19 of 40
10/01 /04
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| IR3081MTR | 功能描述:IC PHASE CONTROLLER 28L 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 |
| IR3081MTRPBF | 功能描述:IC PHASE CONTROLLER 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 |
| IR3082 | 制造商:IRF 制造商全称:International Rectifier 功能描述:XPHASE AMD OPTERON/ATHLON 64 CONTROL IC |
| IR3082AMPBF | 功能描述:IC XPHASE CONTROL 9.6V 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 |
| 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 |
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