参数资料
型号: IR3084UMPBF
厂商: International Rectifier
文件页数: 37/47页
文件大小: 0K
描述: IC XPHASE CONTROL 28-MLPQ
标准包装: 100
系列: XPhase™
应用: 处理器
电流 - 电源: 14mA
电源电压: 9.5 V ~ 16 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)
IR3084U
Using the calculated value of C VDAC , find the positive VID voltage rise time (TD4) to the specified nominal DAC
voltage of 1.300V during startup with Boot Mode using Equation 4a;
TD 4 =
C VDAC
I SOURCE
? ( VDAC ? 1 . 1 V ) =
33 nF
90 uA
* ( 1 . 300 V ? 1 . 1 V ) = 73 . 3 us
No Load Output Voltage Setting Resistor RVSETPT, R FB and Adaptive Voltage Positioning Resistor R DRP
First, use Equations (19) and (20) to calculate the current sense resistors R CS+ and R CS? , respectively. For this
design, in the next section, R CS+ is determined to be 10K
and R CS? is found to be 6.19K .
Second, calculate the total input offset voltage (V CS_TOFST ) of the current sense amplifiers using Equation (6).
From the IR3086A data sheet, typical values for the I CSIN+ and I CSIN? bias currents are determined to be 0.25μA
and 0.40μA, respectively.
V CS_TOFST = V CS_OFST + ( I CSIN + ? R CS + ) ? ( I CSIN ? ? R CS ? )
= 0 . 55 mV + ( 0 . 25 * 10 ? 6 * 10 K ? ) ? ( 0 . 40 * 10 ? 6 * 6 . 19 K ? ) = 0 . 574 mV
Next, derive the intermediate calculations (A,B,C,D) as shown below before finally calculating R VSETPT and RDRP
using Equations (7) and (8). From Figure 15 on page Error! Bookmark not defined. , the I VSETPT bias current is
determined to be 40μA at R OSC =30.1k
and a typical value for the offset voltage of the error amplifier is 0.0mV.
A =
Io * R L * G CSA
n
+ V CS _ TOFST * G CSA + V OS _ EA =
130 * 0 . 60 * 10 ? 3 * 34
7
+ 0 . 574 * 10 ? 3 * 34 + 0 . 0 mV
= 0 . 3984
B = V O _ NLOFST + Io * Ro ? V OS _ EA = 15 * 10 ? 3 + 130 * 1 . 20 * 10 ? 3 ? 0 . 0 mV = 0 . 1710
C = V CS_TOFST *G CSA + V OS_EA = 0.574*10 ? 3 *34 + 0.0mV = 0.0.0195
D = V O _ NLOFST ? V OS _ EA = 15 * 10 ? 3 ? 0 . 0 mV = 0 . 015
VSETPT =
A * D ? C * B
( A + B ? C ? D )
=
0 . 3984 * 0 . 015 ? 0 . 0195 * 0 . 1710
0 . 3984 + 0 . 1710 ? 0 . 0195 ? 0 . 015
= 0 . 00494 V
RVSETPT =
VSETPT
I VSETPT
=
0 . 00494
40 x 10 ? 6
= 123 . 5 ohms
Choose the closest standard resistor value to this with 1% tolerance or RVESTPT = 124ohms.
Page 37 of 47
June 1, 2009
相关PDF资料
PDF描述
IR3086AMPBF IC PHASE CONTROLLER OVP 20MLPQ
IR3086MPBF IC CONTROLLER PHASE 20MLPQ
IR3087MPBF IC XPHASE W/OVP/TM CTRL 20MLPQ
IR3087M IC XPHASE W/OVP/TM CTRL 20-MLPQ
IR3088AMPBF IC XPHASE CONTROL 20L-MLPQ
相关代理商/技术参数
参数描述
IR3084UMTRPBF 功能描述:开关变换器、稳压器与控制器 VR10 VR11 Athlon64 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
IR3086 制造商:IRF 制造商全称:International Rectifier 功能描述:PHASE IC WITH OVP, FAULT AND OVERTEMP DETECT
IR3086A 制造商:IRF 制造商全称:International Rectifier 功能描述:XPHASETM PHASE IC WITH OVP, FAULT AND OVERTEMP DETECT
IR3086AM 制造商:IRF 制造商全称:International Rectifier 功能描述:XPHASETM PHASE IC WITH OVP, FAULT AND OVERTEMP DETECT
IR3086AMPBF 功能描述:IC PHASE CONTROLLER OVP 20MLPQ 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