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参数资料
| 型号： | IR3514MTRPBF |
| 厂商： | International Rectifier |
| 文件页数： | 32/46页 |
| 文件大小： | 0K |
| 描述： | IC XPHASE3 CONTROL HYBRD 40-MLPQ |
| 产品变化通告： | (EP) Parts Discontinuation 25/May/2012 |
| 标准包装： | 1 |
| 系列： | XPhase3™ |
| 应用： | 处理器 |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 40-MLPQ |
| 供应商设备封装： | 40-MLPQ（6x6） |
| 包装： | 标准包装 |
| 产品目录页面： | 1383 (CN2011-ZH PDF) |
| 其它名称： | IR3514MTRPBFDKR |
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IR3514
C VDAC
I SINK
SR DOWN
(5)
3 . 2 10
R VDAC
0 . 5
15
C VDAC 2
(6)
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 (7),
where R L_MAX and R L_ROOM are the inductor DCR at maximum temperature T L_MAX and room temperature
T L _ ROOM respectively.
R L _ MAX
R L _ ROOM [ 1 3850 * 10 6 ( T L _ MAX T L _ ROOM )]
(7)
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
(8)
The over current limit is set by the external resistor R OCSET as defined in (9). I LIMIT is the required over current
limit. I OCSET is the bias current of OCSET pin and can be calculated with the equation in the ELECTRICAL
CHARACTERISTICS Table. G CS is the gain of the current sense amplifier. K P is the ratio of inductor peak current
over average current in each phase and can be calculated from (10).
R OCSET
[
I LIMIT
n
R L _ MAX ( 1 K P ) V CS _ TOFST ] G CS / I OCSET
(9)
K P
( V I V O ) V O /( L V I f SW 2 )
I O / n
(10)
VCCL Programming Resistor R VCCLFB1 and R VCCLFB2
Since VCCL voltage is proportional to the MOSFET gate driver loss and inversely proportional to the
MOSFET conduction loss, the optimum voltage should be chosen to maximize the converter efficiency. VCCL
linear regulator consists of an external NPN transistor, a ceramic capacitor and a programmable resistor
divider. Pre-select R VCCLFB1 , and calculate R VCCLFB2 from (11).
R VCCLFB 2
R VCCLFB 1 * 1. 23
VCCL 1 . 23
(11)
No Load Offset Setting Resistor RFB11, RFB13, RTHERM1 and Adaptive Voltage Positioning Resistor
RDRP11 for Output1
Define R FB_R is the effective offset resistor at room temperature equals to R FB11 //(R FB13 +R THERM1 ). Given the
offset voltage V O_NLOFST above the DAC voltage, calculate the sink current from the FB1 pin I FB1 using the
equation in the ELECTRICAL CHARACTERISTICS Table, then the effective offset resistor value R FB1 can be
determined from (12).
Page 32 of 46
10/30/2007
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相关代理商/技术参数 |
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| 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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| IR3521 | 制造商:IRF 制造商全称:International Rectifier 功能描述:XPHASE3TM AMD SVID CONTROL IC |
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