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参数资料
| 型号： | IR3513ZMTRPBF |
| 厂商： | International Rectifier |
| 文件页数： | 27/36页 |
| 文件大小： | 0K |
| 描述： | IC CTRL XPHASE3 POL 32-MLPQ |
| 标准包装： | 3,000 |
| 系列： | XPhase3™ |
| 应用： | 处理器 |
| 电流 - 电源： | 3mA |
| 电源电压： | 8 V ~ 16 V |
| 工作温度： | 0°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 32-VFQFN 裸露焊盘 |
| 供应商设备封装： | 32-MLPQ（5x5） |
| 包装： | 带卷 (TR) |
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NOT RECOMMENDED FOR NEW DESIGNS
REPLACEMENT PRODUCT – IR3513ZMTRPBF
IR3513
Over Current Setting Resistor R OCSET
The inductor DC resistance is utilized to sense the inductor current. The copper wire of the inductor has a
constant temperature coefficient of 3850 ppm/°C, and therefore the maximum inductor DCR can be calculated
from (5). R L_MAX and R L_ROOM are the inductor DCR value 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 )]
(5)
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 current flowing through the current
sense resistor R CS .
V CS _ TOFST = V CS _ OFST + I CSIN + ? R CS
(6)
The over-current limit is set by the external resistor, R OCSET, as defined in (7), where I LIMIT is the required over
current limit. I OCSET, the bias current of OCSET pin, changes with switching frequency set by resistor R OSC and is
determined by equation (9). G CS is the gain of the current sense amplifier. In a multiphase architecture the peak
to peak ripple of the net inductor current is much smaller than the stand alone phase due to interleaving. The ratio
of the peak to average current in this case can be approximated using (8).
R OCSET = [
I LIMIT
n
? R L _ MAX ? ( 1 + K P ) + V CS _ TOFST ] ? G CS / I OCSET
(7)
? V I ? D ? ( 1 ? D ) ? n ? ( D ? n ) ? ( n
? D ) ?
K P =
? ?
? m m + 1 ?
( I LIMIT / n ) ? L ? f sw ? 2 ? D ? ( 1 ? D )
(8)
Iocset =
600
Rosc ( K ? )
(9)
Where
I LIMIT =Maximum over current limit
n=Number of phases
K P =Ratio of the peak to average current for the inductor
G CS =Gain of the current sense amplifier
I OCSET = Determined by the ROSC and given (9)
D=Vo/V I
m=Maximum integer that doesn’t exceed (n*D)
Vout Programming Resistor R FB1 and R FB3
The Feedback pin (FB) is connected to an external resistor divider to set the output voltage. The error amplifier
has a 0.8 V reference (Typical) and the output voltage is determined by selecting resistor divider values (See
Figure 1).
Page 27
R FB 3 =
R FB 1 * 0 . 8
Vout ? 0 . 8
(10)
May 11, 2008
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相关代理商/技术参数 |
参数描述 |
|---|---|
| IR3513ZMTRPBF-CUT TAPE | 制造商:IR 功能描述:IR3513 Series 16 V 3 mA Surface Mount XPhase3 POL Control IC - MLPQ-32 |
| IR3514 | 制造商:IRF 制造商全称:International Rectifier 功能描述:XPHASE3TM AMD HYBRID CONTROL IC |
| IR3514MPBF | 制造商:International Rectifier 功能描述: |
| IR3514MTRPBF | 功能描述:开关变换器、稳压器与控制器 COMPLETE AMD SVID OR PVID PWR SOLUTION 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 |
| IR3515SPBF | 制造商:International Rectifier 功能描述:MOSFET, Power;N-Ch;VDSS 150V;RDS(ON) 0.045Ohm;ID 41A;D2Pak;PD 200W;VGS +/-30V |
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