参数资料
| 型号： | IR3510MPBF |
| 厂商： | International Rectifier |
| 文件页数： | 28/36页 |
| 文件大小： | 0K |
| 描述： | IC XPHASE CONTROL 32-MLPQ |
| 标准包装： | 100 |
| 系列： | XPhase™ |
| 应用： | 处理器 |
| 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： | 剪切带 (CT) |
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
IR3510
VCC,CX and VBIAS Caps
Both VCC and VBIAS require a 0.1 uF 16V 0603 cap. For Charge Pump output cap CX, a 0.1uF 50V 0603 cap is
needed since the charge pump voltage can be up to 27V.
Oscillator Resistor Rosc
The oscillator of IR3510 generates a triangle waveform to synchronize the phase ICs, and the switching frequency
of the each phase equals the oscillator frequency, which is set by the external resistor R OSC according to the curve
in Fig. 16.
1000
950
900
850
800
750
700
650
600
550
500
450
400
350
300
250
200
150
Oscillator Frequency versus ROSC
125
115
105
95
85
75
65
55
45
35
25
15
5
Irosc Currents vs ROSC
10
15
20
25
30
35
40
45
50
55
60
65
70
75
80
85
90
95
100
10
15
20
25
30
35
40
45
50
55
60
65
70
75
80
85
90
95
100
ROSC (K Ohms)
Fig. 16 Switching frequency Vs. Rosc
ROSC (K Ohm)
Fig. 17 Irosc Current Vs. Rosc
Soft Start Capacitor C SS
The soft start capacitor C SS programs the soft start time for both the voltage regulator input voltage, which is the
voltage after the input FET, and the converter output voltage. An internal 70uA current source charges the soft-
start cap until it reaches the final charge-up voltage, which is typical 3.8V. It sets the input voltage ramp-up time,
the output delay time, the output voltage ramp-up time and the VRRDY delay time.
The input voltage ramp-up time is determined by the input soft-start regulator gain Kss, which is typical 4.5, Vin
and the input voltage applied before the input FET. Assume the input FET gate charge is small enough, so the
gate voltage can follow the soft-start cap voltage,
Tir =
C SS * Vin
I CHG * Kss
=
C SS * 12
70 * 10 ? 6 * 4 . 5
If the input FET has large gate charge or more than one input FETs are paralleled, the gate charge current may
not be large enough to keep the voltage following the soft-start cap voltage, resulting in longer ramp-up time.
There is a delay time added in the soft-start of the converter output. The voltage error amplifier output is held
LOW until the soft-start cap reaches 1.35v, resulting in the delay time.
Tod =
C SS * 1. 35
I CHG
=
C SS * 1.35
70 * 10 ? 6
After the soft-start cap voltage moves above 1.35V, the voltage error amplifier is released and the feedback
voltage VFB follows the soft-start cap voltage until it reaches the VSET voltage. Assuming the final VFB is less
than the soft-start charge-up voltage, the converter output voltage ramp-up time is,
Page 28 of 36
IR Confidential
May 18, 2009
相关PDF资料 |
PDF描述 |
|---|---|
| IR3513ZMTRPBF | IC CTRL XPHASE3 POL 32-MLPQ |
| IR3514MTRPBF | IC XPHASE3 CONTROL HYBRD 40-MLPQ |
| IR3521MTRPBF | IC CTRL XPHASE3 SVID 32-MLPQ |
| IR3522MTRPBF | IC CTRL XPHASE3 DDR/VVT 32-MLPQ |
| IR3523MTRPBF | IC XPHASE3 CTLR VR11.1 40-MLPQ |
相关代理商/技术参数 |
参数描述 |
|---|---|
| IR3510MTRPBF | 功能描述:热插拔功率分布 HOT-SWAP N+1 XPHASE CTRL IC RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制: 电源电压-最大:7 V 电源电压-最小:- 0.3 V 工作温度范围: 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Tube |
| IR3513MTRPBF | 功能描述:开关变换器、稳压器与控制器 2 CH OR 2 PHASE SYNC PWM CNTRLR 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 |
| IR3513XMTRPBF | 功能描述:功率驱动器IC RoHS:否 制造商:Micrel 产品:MOSFET Gate Drivers 类型:Low Cost High or Low Side MOSFET Driver 上升时间: 下降时间: 电源电压-最大:30 V 电源电压-最小:2.75 V 电源电流: 最大功率耗散: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Tube |
| IR3513Z | 制造商:IRF 制造商全称:International Rectifier 功能描述:XPHASE3TM POL CONTROL IC |
| IR3513ZMPBF | 制造商:IRF 制造商全称:International Rectifier 功能描述:XPHASE3TM POL CONTROL IC |
发布紧急采购，3分钟左右您将得到回复。