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参数资料
| 型号： | IR3522MTRPBF |
| 厂商： | International Rectifier |
| 文件页数： | 23/32页 |
| 文件大小： | 0K |
| 描述： | IC CTRL XPHASE3 DDR/VVT 32-MLPQ |
| 标准包装： | 3,000 |
| 系列： | XPhase3™ |
| 应用： | 处理器 |
| 电流 - 电源： | 7mA |
| 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) |
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IR3522
DESIGN PROCEDURES - IR3522 AND IR3506 CHIPSET
IR3522 EXTERNAL COMPONENTS
All the output components are selected using one output but suitable for both unless otherwise specified.
Oscillator Resistor R R osc
The only one oscillator of IR3522 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 11 to determine the R ROSC value. The CLKOUT frequency equals the switching frequency
multiplied by the phase number.
PHSOUT FREQUENCY vs. RROSC
1600
1500
1400
1300
1200
1100
1000
900
800
700
600
500
400
300
200
5
10
15
20
25
30
35
40
45
50
55
RROSC (KOhm)
Figure 11 - PHSOUT Frequency vs. RROSC chart
Soft Start Capacitor C SS/DEL
The Soft Start capacitor C SS/DEL programs three different time parameters, soft start delay time, soft start time,
and soft stop time.
SS/DEL pin voltage controls the slew rate of the converter output voltage, as shown in Figure 10. 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 SVID voltage (or default
voltage) and the SS/DEL pin voltage rises from 1.4V to SVID voltage plus 1.4V. Power good time, TD3, is the
time period from VR reaching the SVID voltage to the PGOOD signal being issued.
Calculate C SS/DEL based on the required soft start time TD2.
Page 23
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相关代理商/技术参数 |
参数描述 |
|---|---|
| IR3523 | 制造商:IRF 制造商全称:International Rectifier 功能描述:XPHASE3TM DUAL OUTPUT CONTROL IC |
| IR3523MPBF | 制造商:IRF 制造商全称:International Rectifier 功能描述:XPHASE3TM DUAL OUTPUT CONTROL IC |
| IR3523MTRPBF | 功能描述:开关变换器、稳压器与控制器 X-PHASE IR3523 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 |
| IR3527 | 制造商:IRF 制造商全称:International Rectifier 功能描述:XPHASE3TM DUAL PHASE IC |
| IR3527MPBF | 制造商:IRF 制造商全称:International Rectifier 功能描述:XPHASE3TM DUAL PHASE IC |
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