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参数资料
| 型号： | IR3500VMTRPBF |
| 厂商： | International Rectifier |
| 文件页数： | 25/34页 |
| 文件大小： | 0K |
| 描述： | IC XPHASE3 CTLR VR11.1 32-MLPQ |
| 标准包装： | 1 |
| 系列： | XPhase3™ |
| 应用： | 处理器 |
| 电流 - 电源： | 6.5mA |
| 电源电压： | 4.75 V ~ 7.5 V |
| 工作温度： | 0°C ~ 100°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： | 标准包装 |
| 其它名称： | IR3500VMTRPBFDKR |
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IR3500V
TD 2 =
C SS / DEL * 1. 1
I CHG
=
C SS / DEL * 1. 1
52 . 5 * 10 ? 6
(3)
TD 3 =
C SS / DEL * ( 3 ? 1. 4 ? 1 . 1)
I CHG
=
C SS / DEL * 0. 7
52 . 5 * 10 ? 6
(4)
TD 4 =
C SS / DEL * V DAC ? 1 .1
I CHG
=
C SS / DEL * V DAC ? 1.1
52 . 5 * 10 ? 6
(5)
TD 5 =
C SS / DEL * (3.92 ? 3)
I CHG
? TD 4 =
C SS / DEL * 0.92
52 . 5 * 10 ? 6
? TD 4
(6)
The minimum over-current fault latch delay time t OCDEL is determined by the value of C SS/DEL and can be
quantified as
t OCDEL =
C SS / DEL * 0 .12
I DISCHG
=
C SS / DEL * 0. 12
55 * 10 ? 6
(7)
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
(8), where I SINK is the sink current of VDAC pin. The slew rate of VDAC up-slope is the same as that of down-
slope.
C VDAC =
I SINK
SR DOWN
=
44 * 10 ? 6
SR DOWN
(8)
The resistor R VDAC is used to compensate VDAC circuit and can be calculated as follows
R VDAC = 0 . 5 +
3 . 2 ? 10 ? 15
C VDAC 2
(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 (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 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
(11)
The over-current limit is set by the external resistor R OCSET and is given by (12). 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 (13).
Page 25 of 34
July 28, 2008
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相关代理商/技术参数 |
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| IR3502 | 制造商:IRF 制造商全称:International Rectifier 功能描述:XPHASE3TM CONTROL IC |
| IR3502_09 | 制造商:IRF 制造商全称:International Rectifier 功能描述:XPHASE3TM CONTROL IC |
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| IR3502AMTRPBF | 功能描述:IC XPHASE CTRL VR11.0/1 32-MLPQ RoHS:是 类别:集成电路 (IC) >> PMIC - 电源管理 - 专用 系列:XPhase3™ 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 |
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