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参数资料
| 型号： | IR3081 |
| 厂商： | International Rectifier |
| 英文描述： | XPHASE VR 10.0 CONTROL IC |
| 中文描述： | XPHASE村10.0控制IC |
| 文件页数： | 11/20页 |
| 文件大小： | 396K |
| 代理商： | IR3081 |
IR3081
Page 11 of 20
9/1/03
IR3081 THEORY OF OPERATION
Block Diagram
The Block diagram of the IR3081 is shown in figure 6 and discussed in the following section.
+
+
-
DISABLE
EAOUT
FB
ERROR
AMP
IFB
+
-
1.3V
IROSC
IROSC
IROSC
+
-
VBIAS
+
-
+
-
+
-
+
-
+
-
+
-
+
-
+
-
+
-
+
-
+
-
+
-
ENABLE
VOSNS-
IIN
OCSET
VID3
VID4
VID5
VID0
VID1
VCC
LGND
ROSC
VID2
VDAC
RMPOUT
SS/DEL
PWRGD
VDRP
VBIAS
IROSC
VID
IIROSC
IROSC
IROSC
IRIROSC
IROSC
IROSC
VID = 11111X
VID DAC OUTPUT
VID STEP-DOWN
6uA
50%
DUTY
CYCLE
ON
1.2V
IDISCHG
1.0V
CURRENT
SOURCE
GENERATOR
RAMP GENERATOR
66uA
SS/DEL
DISCHARGE
IOCSET
BBFB
OC
COMPARATOR
6.8V
VCHG
4V
SOFTSTART
CLAMP
5.0V
VBIAS
REGULATOR
ICHG
VDRP
AMP
ROSC
BUFFER
AMP
0.2V
OFF
90mV
+
-
0.6V
STOP
+
VCC UVLO
COMPARATOR
START
9.1V
8.9V
ENABLE
COMPARATOR
START
STOP
+
-
-
DELAY
COMPARATOR
DISCHARGE
COMPARATOR
OVER
CURRENT
FAULT
LATCH
R
S
S
D
Figure 6 – IR3081 Block Diagram
VID Control
A 6-bit VID voltage compatible with VR 10.0, as shown in Table 1 is available at the VDAC pin. A detailed block
diagram of the VID control circuitry can be found in Figure 7. The VID pins are require an external bias voltage and
should not be floated. The VID input comparators, with 0.6V reference, monitor the VID pins and control the 6 bit
Digital-to-Analog Converter (DAC) whose output is sent to the VDAC buffer amplifier. The output of the buffer amp
is the VDAC pin. The VDAC voltage is post-package trimmed to compensate for the input offsets of the Error Amp
to provide a 1.0%
system
accuracy. The actual VDAC voltage does not determine the system accuracy and has a
wider tolerance.
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| IR3081M | XPHASE VR 10.0 CONTROL IC |
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| IR3088A | XPHASETM PHASE IC WITH FAULT AND OVERTEMP DETECT |
| IR3088AM | XPHASETM PHASE IC WITH FAULT AND OVERTEMP DETECT |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| IR3081A | 制造商:IRF 制造商全称:International Rectifier 功能描述:XPHASETM VR 10 CONTROL IC |
| IR3081AM | 制造商:IRF 制造商全称:International Rectifier 功能描述:XPHASETM VR 10 CONTROL IC |
| IR3081AMPBF | 功能描述:IC CTRLR XPHASE VR10.0 28MLPQ 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 |
| IR3081AMPBF | 制造商:International Rectifier 功能描述:Controller IC Package/Case:28-MLPQ |
| IR3081AMTR | 制造商:IRF 制造商全称:International Rectifier 功能描述:XPHASETM VR 10 CONTROL IC |
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