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参数资料
| 型号： | IR3513ZMTRPBF |
| 厂商： | International Rectifier |
| 文件页数： | 28/36页 |
| 文件大小： | 0K |
| 描述： | IC CTRL XPHASE3 POL 32-MLPQ |
| 标准包装： | 3,000 |
| 系列： | XPhase3™ |
| 应用： | 处理器 |
| 电流 - 电源： | 3mA |
| 电源电压： | 8 V ~ 16 V |
| 工作温度： | 0°C ~ 125°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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NOT RECOMMENDED FOR NEW DESIGNS
REPLACEMENT PRODUCT – IR3513ZMTRPBF
IR3513
VCCL Programming Resistor R VCCLFB1 and R VCCLFB2
Since VCCL voltage is proportional to the MOSFET gate driver loss and inversely proportional to the
MOSFET conduction loss, the optimum voltage should be chosen to maximize the converter efficiency. VCCL
linear regulator consists of an external NPN transistor, a ceramic capacitor and a programmable resistor
divider. Pre-select R VCCLFB1 , and calculate R VCCLFB2 from (11).
R VCCLFB 2 =
R VCCLFB 1 * 1.19
VCCL ? 1 . 19
(11)
VCCL Capacitor C VCCL
The capacitor is selected based on the stability requirement of the linear regulator and the load current to be
driven. The linear regulator supplies the bias and gate drive current of the phase ICs. A 4.7uF normally ensures
stable VCCL performance for most applications.
VCCL Regulator Drive Resistor R VCCLDRV
The drive resistor is primarily dependent on the load current requirement of the linear regulator and the
minimum input voltage requirements. The following equation gives an estimate of the average load current of
the switching phase ICs.
I drive _ avg = ( Q gb + Q gt ) ? n + I VCCL _ PHS ? ( n ? 1 ) + I VCCL _ C
(12)
Q gb and Q gt are the gate charge of the top and bottom FET, I VCCL_PHS is the VCCL current of the phase IC-s,
I VCCL_C is the VCCL current of the controller and n is the number of phases. For a minimum input voltage and
a maximum VCCL, the maximum R VCCLDRV required to use the full pull-down current of the VCCL driver is
given by
R VCCLDRV =
V I (min) ? 0 . 7 ? VCCL (max)
I drive _ avg / β min
(13)
Due to limited pull down capability of the VCCLDRV pin, make sure the following condition is satisfied.
V I (max) ? 0 . 7 ? VCCL (min)
R VCCLDRV
< 10 mA
(14)
In the above equation, V I ( min) and V I ( max) is the minimum and maximum anticipated input voltage. If the
above condition is not satisfied there is a need to use a device with higher β min or Darlington configuration can
be used instead of a single NPN transistor.
Inductor Current Sensing Capacitor C CS and Resistor R CS
The DC resistance of the inductor is utilized to sense the inductor current. Usually the resistor R CS and capacitor
C CS in parallel with the inductor are chosen to match the time constant of the inductor, and therefore the voltage
across the capacitor C CS represents the inductor current. If the two time constants are not the same, the AC
component of the capacitor voltage is different from that of the real inductor current. The time constant mismatch
does not affect the average current sharing among the multiple phases, but affects the current signal ISHARE.
Measure the inductance L and the inductor DC resistance R L . Pre-select the capacitor C CS and calculate R CS as
follows.
Page 28
R CS =
L R L
C CS
(15)
May 11, 2008
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相关代理商/技术参数 |
参数描述 |
|---|---|
| IR3513ZMTRPBF-CUT TAPE | 制造商:IR 功能描述:IR3513 Series 16 V 3 mA Surface Mount XPhase3 POL Control IC - MLPQ-32 |
| IR3514 | 制造商:IRF 制造商全称:International Rectifier 功能描述:XPHASE3TM AMD HYBRID CONTROL IC |
| IR3514MPBF | 制造商:International Rectifier 功能描述: |
| IR3514MTRPBF | 功能描述:开关变换器、稳压器与控制器 COMPLETE AMD SVID OR PVID PWR SOLUTION 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 |
| IR3515SPBF | 制造商:International Rectifier 功能描述:MOSFET, Power;N-Ch;VDSS 150V;RDS(ON) 0.045Ohm;ID 41A;D2Pak;PD 200W;VGS +/-30V |
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