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| 型号： | IR3502MTRPBF |
| 厂商： | International Rectifier |
| 文件页数： | 26/39页 |
| 文件大小： | 0K |
| 描述： | IC XPHASE3 CONTROLLER 32-MLPQ |
| 标准包装： | 1 |
| 系列： | XPhase3™ |
| 应用： | 处理器 |
| 电流 - 电源： | 8mA |
| 电源电压： | 8 V ~ 16 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 |
| 产品目录页面： | 1383 (CN2011-ZH PDF) |
| 其它名称： | IR3502MTRPBFDKR |
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IR3502
DESIGN PROCEDURES - IR3502 AND IR3507 CHIPSET
IR3502 EXTERNAL COMPONENTS
Oscillator Resistor Rosc
The oscillator of IR502 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 OSC according to
the curve in Figure 18. The CLKOUT frequency equals the switching frequency multiplied by the phase number.
The Rosc sets the reference current used for no load offset which is given by Figure 19 and equals:
ISETPT =
0.595
Rosc
(1)
Soft Start Capacitor C SS/DEL
The soft start capacitor C SS/DEL programs five different time parameters. They include soft start delay time, soft
start time, VID sample delay time, VR ready delay time and over-current fault latch delay time after VR ready.
For the converter using VID with boot voltage, the SS/DEL pin voltage controls the slew rate of the converter
output voltage, as shown in Figure 9. After the ENABLE pin voltage rises above 0.85V, there is a soft-start delay
time TD1 , after which the error amplifier output is released to allow the soft start of output voltage. The soft start
time TD2 represents the time during which converter voltage rises from zero to 1.1V . The VID sample delay time
(TD3) is the time period when VID stays at boot voltage of 1.1V. VID rise or fall time (TD4) is the time when VID
changes from boot voltage to the final voltage. The VR ready delay time (TD5) is the time period from VR
reaching the final voltage to the VR ready signal being issued, which is determined by the delay comparator
threshold.
C SS/DEL = 0.1uF meets all the specifications of TD1 to TD5, which are determined by (2) to (6) respectively.
TD 1 =
TD 2 =
C SS / DEL *1.4
I CHG
C SS / DEL *1.1
I CHG
=
=
C SS / DEL * 1.4
52 . 5 * 10 ? 6
C SS / DEL *1.1
52 . 5 * 10 ? 6
(2)
(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)
Page 26 of 39
July 28, 2009
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相关代理商/技术参数 |
参数描述 |
|---|---|
| IR3503MTRPBF | 功能描述:开关变换器、稳压器与控制器 X-PHASE IR3503 AMD SVID 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 |
| IR3504MPBF | 制造商:International Rectifier 功能描述:Control IC 32-Pin MLPQ Strip |
| IR3504MTRPBF | 功能描述:开关变换器、稳压器与控制器 X-PHASE IR3504 AMD SVID 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 |
| 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 |
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