- 您现在的位置：买卖IC网 > PDF目录1809 > IR3504MTRPBF (International Rectifier)IC CTRL XPHASE3 SVID 32-MLPQ PDF资料下载
参数资料
| 型号： | IR3504MTRPBF |
| 厂商： | International Rectifier |
| 文件页数： | 28/42页 |
| 文件大小： | 0K |
| 描述： | IC CTRL XPHASE3 SVID 32-MLPQ |
| 标准包装： | 3,000 |
| 系列： | XPhase3™ |
| 应用： | 处理器 |
| 电流 - 电源： | 10mA |
| 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： | 带卷 (TR) |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页当前第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页
IR3504
DESIGN PROCEDURES - IR3504 AND IR3505 CHIPSET
IR3504 EXTERNAL COMPONENTS
All the output components are selected using one output but suitable for both unless otherwise specified.
Oscillator Resistor R R osc
The IR3504 generates square-wave pulses to synchronize the phase ICs. The switching frequency of the each
phase converter equals the PHSOUT frequency, which is set by the external resistor R ROSC , use Figure 2 to
determine the R ROSC value. The CLKOUT frequency equals the switching frequency multiplied by the phase
number.
Soft Start Capacitor C SS/DEL
The Soft Start capacitor C SS/DEL programs four different time parameters, soft start delay time, soft start time, VR
ready delay time and over-current fault latch delay time after VR ready.
SS/DEL pin voltage controls the slew rate of the converter output voltage, as shown in Figure 11. Once the
ENABLE pin rises above 1.65V, there is a soft-start delay time TD1 during which SS/DEL pin is charged from
zero to 1.4V. Once SS/DEL reaches 1.4V the error amplifier output is released to allow the soft start. The soft
start time TD2 represents the time during which converter voltage rises from zero to pre-PWROK VID voltage and
the SS/DEL pin voltage rises from 1.4V to pre-PWROK VID voltage plus 1.4V. VR ready delay time TD3 is the
time period from VR reaching the pre-PWROK VID voltage to the VR ready signal being issued.
Calculate C SS/DEL based on the required soft start time TD2.
C SS / DEL =
TD 2 * I CHG
V pre ? PWROK
=
TD 2 * 50 * 10 ? 6
V pre ? PWROK
(1)
The soft start delay time TD1 and VR ready delay time TD3 are determined by equation (2) and (3) respectively.
TD 1 =
C SS / DEL * 1. 1
I CHG
=
C SS / DEL * 1 .1
50 * 10 ? 6
(2)
TD 3 =
C SS / DEL * (3 . 92 ? V pre ? PWROK ? 1 . 1)
I CHG
=
C SS / DEL * (3 . 92 ? V pre ? PWROK ? 1 . 1)
50 * 10 ? 6
(3)
Once C SS/DEL is chosen, use equation (4) to calculate the maximum over-current fault latch delay time t OCDEL.
= 2 . 5 * SS / DEL ? 6
t OCDEL = 2 . 5 *
C SS / DEL * 0 .13
I DISCHG
C * 0 .13
47 * 10
(4)
Due to the exponential turn-on slope of the discharge current (47uA), a correction factor (X2.5) is added to the
equation (4) to accurately predict over-current delay time.
Page 28
July 28, 2009
相关PDF资料 |
PDF描述 |
|---|---|
| IR3505MPBF | IC XPHASE3 CONTROL 16-MLPQ |
| IR3505ZMTRPBF | IC XPHASE3 CTLR 2.5A 16-MLPQ |
| IR3506MTRPBF | IC CTRL XPHASE3 DDR 16-MLPQ |
| IR3507MTRPBF | IC XPHASE3 CONTROL 20-MLPQ |
| IR3507ZMTRPBF | IC CTRL XPHASE3 20-MLPQ |
相关代理商/技术参数 |
参数描述 |
|---|---|
| IR3505 | 制造商:IRF 制造商全称:International Rectifier 功能描述:XPHASE3TM PHASE IC |
| IR3505MPBF | 功能描述:IC XPHASE3 CONTROL 16-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 |
| IR3505MTRPBF | 功能描述:开关变换器、稳压器与控制器 XPHASE3 DDR VTT 7V 2A 3 Wire 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 |
| IR3505Z | 制造商:IRF 制造商全称:International Rectifier 功能描述:XPHASE3TM PHASE IC |
| IR3505ZMPBF | 制造商:IRF 制造商全称:International Rectifier 功能描述:XPHASE3TM PHASE IC |
发布紧急采购，3分钟左右您将得到回复。