收藏本站
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
发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

*型号 *数量 厂商 批号 封装
添加更多采购

我的联系方式

*
*
*
相关PDF资料
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
SR204 SHELF FIXED 2U CANTILEVER
SR205 SHELF SLIDING 4-POST 1U
SR206 SHELF SLIDING 4-POST 2U
相关代理商/技术参数
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
SP7601EK1-L/TR 功能描述:LED照明驱动器 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
SP7606 制造商:EXAR 制造商全称:EXAR 功能描述:Wide Input Voltage Boost Controller
SP7606ER-L 制造商:EXAR 制造商全称:EXAR 功能描述:Wide Input Voltage Boost Controller