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| 型号： | SP7600EN2-L |
| 厂商： | Exar Corporation |
| 文件页数： | 10/13页 |
| 文件大小： | 0K |
| 描述： | IC LED DRVR PWM STP-DWN 8HNSOIC |
| 标准包装： | 98 |
| 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 ~ 1.44MHz |
| 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-EP |
| 包装： | 管件 |
| 工作温度： | -40°C ~ 125°C |
| 配用： | 1016-1233-ND - EVAL BOARD FOR SP7600 |
| 其它名称： | SP7600EN2-L-ND |
S P 7 6 0 0
2 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
a string of series connected LEDs Vo equals
Resistance (ESR),
Equivalent Series
Equ.5 : If ≥ 1 ?
× Io
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 capacitanceand
ripple current rating. Use the capacitances
listed in the table 1 as a starting point and if
needed increase Cin.
I O (A) Cin (μF)
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
<0.7
0.71 to 1.2
>1.2
2.2
4.7
2 x 4.7
current rating and has a lower Vf.
F EEDBACK RESISTOR RFB
Table 1: Cin Selection
Calculate the ripple current requirement from:
R2 is part of SP7600 loop compensation
network. Use a 30k R2 for Vin of 20V and
larger. Use R2 of 60K for Vin less than 20V.
Equ.4: Irip = Io ×
D × ( 1 ? D )
C APACITOR C5
Where D =
Vo
Vin
Ceramic capacitors are recommended for input
filtering due to their low Equivalent Series
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.
? 2009 Exar Corporation
10/13
Rev. 2.0.0
相关PDF资料 |
PDF描述 |
|---|---|
| SPB2 | PANEL SWING KIT |
| SPIKECUBE | SURGE SUPPRESSR 1OUT DIRECT PLUG |
| SPIKESTIK | SURGE SUPPRESSOR SPIKE STIK 6OUT |
| SPS-615-HG | SURGE SUPP 6OUT 15'CORD HOSP GRD |
| SR202 | SHELF FIXED 4-POST HEAVY DUTY |
相关代理商/技术参数 |
参数描述 |
|---|---|
| SP7600EN2-L/TR | 功能描述:LED照明驱动器 2A 29V NON-SYNC BUCK HIGH PWR 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 |
| SP7601 | 制造商:EXAR 制造商全称:EXAR 功能描述:29V High Voltage LED Driver |
| SP7601_EB | 制造商:EXAR 制造商全称:EXAR 功能描述:29V High Voltage LED Driver |
| SP7601EB | 功能描述:LED 照明开发工具 Eval Board for SP7601 Series RoHS:否 制造商:Fairchild Semiconductor 产品:Evaluation Kits 用于:FL7732 核心: 电源电压:120V 系列: 封装: |
| SP7601EK1-L | 功能描述:LED照明驱动器 High Curr DC-to-DC Buck LED Drvr 1.2MHz 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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