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参数资料
| 型号： | IR3500MTRPBF |
| 厂商： | International Rectifier |
| 文件页数： | 30/47页 |
| 文件大小： | 0K |
| 描述： | IC XPHASE3 CONTROLLER 32-MLPQ |
| 产品变化通告： | (EP) Parts Discontinuation 25/May/2012 |
| 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 |
| 产品目录页面： | 1383 (CN2011-ZH PDF) |
| 其它名称： | IR3500MTRPBFDKR |
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IR3500
DESIGN PROCEDURE
Oscillator Resistor Rosc
The oscillator of IR500 generates square-wave pulses to synchronize the phase ICs. The switching frequency of
each phase converter equals the PHSOUT frequency, which is set by the external resistor R OSC according to the
curve in Figure 23. The CLKOUT frequency equals the switching frequency multiplied by the phase number. The
Rosc sets the reference current used for the no load offset and OCSET which is given by Figure 23 and equals:
ISETPT = IOCSET =
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 VR11 VID with boot voltage, the SS/DEL pin voltage controls the slew rate of the
converter output voltage, as shown in Figure 10. 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)
For the converter using VR 11 VID without boot voltage or AMD 5-bit and 6-bit VIDs, the SS/DEL pin voltage
controls the slew rate of the converter output voltage, as shown in Figure 11. After the ENABLE pin voltage rises
above 0.85V/1.2V, there is a soft-start delay time TD1 , after which 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 Vo . VR
ready delay time (TD3) is the time period from VR reaching the final 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 O
=
TD 2 * 52 . 5 * 10 ? 6
V O
(7)
Page 30 of 47
May 18, 2009
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相关代理商/技术参数 |
参数描述 |
|---|---|
| IR3500V | 制造商:IRF 制造商全称:International Rectifier 功能描述:XPHASE3TM VR11.1 CPU VTT CONTROL IC |
| IR3500VMPBF | 制造商:IRF 制造商全称:International Rectifier 功能描述:XPHASE3TM VR11.1 CPU VTT CONTROL IC |
| IR3500VMTRPBF | 功能描述:开关变换器、稳压器与控制器 X-PHASE IR3500V 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 |
| 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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