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| 型号： | XRP7603EDB-F |
| 厂商： | Exar Corporation |
| 文件页数： | 10/13页 |
| 文件大小： | 0K |
| 描述： | IC LED DRVR HIGH PWR 8HSOICN-EP |
| 标准包装： | 46 |
| 恒定电流： | 是 |
| 拓扑： | PWM，降压（降压） |
| 输出数： | 1 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 通用 |
| 类型 - 次要： | 白色 LED |
| 频率： | 960kHz ~ 1.55MHz |
| 电源电压： | 4.5 V ~ 29 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm Width）裸露焊盘 |
| 供应商设备封装： | 8-SOIC |
| 包装： | 管件 |
| 其它名称： | 1016-1338-5 |
X R P 7 6 0 3
5 0 0 m A 2 9 V N o n - S y n c . B u c k H i g h P o w e r L E D D r i v e r
Equ.3: L =
Vo × ( Vin ? Vo )
Vin × f × Δ I L
Ceramic capacitors are recommended for input
filtering due to their low Equivalent Series
Resistance (ESR), Equivalent Series
Equ.5 : If ≥ 1 ?
× Io
Where Vin is converter input voltage and Vo is
converter output voltage. Since voltage across
Rset is small, Vo approximately equals Vf (for
a string of series connected LEDs Vo equals
total Vf)
Δ I L is inductor current ripple (nominally set to
30% of Io)
Inductor Isat and Irms must allow sufficient
safeguard over output current Io. As a rule of
thumb these parameters should be 50%
higher than Io. Where high efficiency is
required a low DCR inductor should be used.
I NPUT CAPACITOR SELECTION
Select the input capacitor for capacitance and
ripple current rating. Use the capacitances
listed in the table 1 as a starting point and if
needed increase Cin.
inductance (ESL) and small form factor.
S CHOTTKY RECTIFIER SELECTION
Select the Schottky D1 for Voltage rating VR
and current rating If. Recommended schottky
diode voltage rating for 12V and 24V
applications is 30V and 40V respectively.
Current rating can be calculated from:
Vo
Vin
Note that in applications where duty cycle is
low, Schottky losses comprise a larger
percentage of converter losses. In order to
improve the efficiency in these applications
choose a Schottky that meets the calculated
current rating and has a lower Vf.
F EEDBACK RESISTOR RFB
I O (A)
<0.7
0.71 to 1.2
>1.2
Cin (μF)
2.2
4.7
2 x 4.7
R2 is part of XRP7603 loop compensation
network. Use a 30k R2 for Vin of 20V and
larger. Use R2 of 60K for Vin less than 20V.
Table 1: Cin Selection
Calculate the ripple current requirement from:
Equ.4: Irip = Io × D × ( 1 ? D )
C APACITOR C5
This is the decoupling capacitor for the power
supply for the internal driver. Use a 0.1uF and
place as closely to VDR and SVIN pins as
possible.
Where D =
Vo
Vin
? 2009 Exar Corporation
10/13
Rev. 1.0.0
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相关代理商/技术参数 |
参数描述 |
|---|---|
| XRP7603EDB-F/TR | 功能描述:电压模式 PWM 控制器 0.5A 29V Non-Sync Buck High Power RoHS:否 制造商:Texas Instruments 输出端数量:1 拓扑结构:Buck 输出电压:34 V 输出电流: 开关频率: 工作电源电压:4.5 V to 5.5 V 电源电流:600 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 封装 / 箱体:WSON-8 封装:Reel |
| XRP7603EDBTR-F | 功能描述:LED照明驱动器 Power LED Driver RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N |
| XRP7603EVB | 功能描述:电源管理IC开发工具 Eval Board for XRP7603 Series RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| XRP7604 | 制造商:EXAR 制造商全称:EXAR 功能描述:1A 29V Non-Sync. Buck High Power LED Driver |
| XRP7604EDB-F | 功能描述:LED照明驱动器 1A 29V Non-Sync Buck High Power RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N |
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