收藏本站
AL3158
HIGH EFFICIENCY 1x/2x CHARGE PUMP
FOR WHITE LED APPLICATIONS
Description
The AL3158 is a low noise, constant frequency charge pump
DC/DC converter that uses a Dual mode load switch (1x), and (2x)
conversion for white LED applications. The AL3158 is capable of
driving three groups of three LED channels at 20mA from a 2.7V to
5.5V input. The current sinks may be operated using three simple
PWM dimming inputs individually or in parallel for driving higher-
current LEDs. Low external part counts (one 1μF flying capacitor
and two 2.2μF capacitors at V IN and V OUT ) make this part ideally
suited for small, battery-powered applications.
AL3158 PWM dimming inputs are used to enable, disable device
and dimming LED current with a fixed default current settings at
20mA or other factory programming options available.
Each output of the AL3158 is equipped with built-in protection for
V OUT short circuit and auto-disable for LED short conditions. Built-in
soft-start circuitry prevents excessive inrush current during start-up
and mode switching. A low-current shutdown feature disconnects
the load from V IN to reduce quiescent current less than 1μA.
The AL3158 is available in a lead-free, space-saving, thermally
enhanced 20-pin 3 x 3mm QFN package.
Features
Pin Assignments
Applications
?
?
?
?
?
?
?
?
?
?
?
?
?
V IN Range: 2.7V to 5.5V
Up to 93% Max Power Efficiency
1% Current Matching Accuracy Between Channels
Three simple PWM dimming for RGB or WLED
Low transition threshold voltage typical 150 mV
Dual-Mode 1x and 2x Charge Pump
Drives up to 3 + 3 + 3 Channels of LEDs
1.2 MHz Constant Switching Frequency
V OUT short circuit and Thermal Protections
Soft Start for reducing inrush current
Under Voltage Lockout Protection
I Q <1μA in Shutdown
Thermally-Enhanced QFN3030-20 Package: Available in “Green”
?
?
?
Mobile Phone White LED Backlighting and Indicators
PDA White LED Backlighting
Battery-operated Phone Main and Sub Screen White LED
Backlighting
Molding Compound (No Br, Sb)
?
Lead Free Finish/ RoHS Compliant (Note 1)
Notes:
1. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at
http://www.diodes.com/products/lead_free.html
Typical Application Circuit
V IN
2.2uF
C IN
8
V IN
AL3158
C P
C N
V OUT
9
7
11
D1
LED
D2
LED
1uF
C 1
D3
LED
EN1
D4
LED
D5
LED
D6
LED
EN2
D7
LED
D8
LED
D9
LED
EN3
2.2uF
C OUT
EN1
3
EN1
D1
12
D2
13
EN2
5
EN2
D3
D4
14
15
D5 16
EN3
4
EN3
PGND
6
D6 18
20
D7
1
D8
2
D9
GND
17
AL3158
Document number: DS35047 Rev. 2 - 2
1 of 10
www.diodes.com
January 2011
? Diodes Incorporated
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
AL3159FSG-7 IC LED DRVR CHG/PMP QFN3030-20
AL5801W6-7 IC LED DRVR HIGH BRIGHT 26SOT
AL5802-7 IC LED DRVR LINEAR 30V SOT26
AL8400SE-7 IC CTRLR LED DRIVER SOT353
AL8805W5-7 IC REG SW CONV BUCK ASYNC SOT-23
AL8806MP8-13 IC LED DVR CONS CURR 8MSOP
AL8807W5-7 IC LED DRVR DCDC BUCK SOT25
AL9910AS-13 IC LED DRVR HIGH BRIGHT SO8EP
相关代理商/技术参数
AL3159 制造商:DIODES 制造商全称:Diodes Incorporated 功能描述:HIGH EFFICIENCY 1x/2x CHARGE PUMP FOR WHITE LED APPLICATIONS
AL3159_11 制造商:DIODES 制造商全称:Diodes Incorporated 功能描述:HIGH EFFICIENCY 1x/2x CHARGE PUMP FOR WHITE LED APPLICATIONS
AL3159FSG 制造商:DIODES 制造商全称:Diodes Incorporated 功能描述:HIGH EFFICIENCY 1x/2x CHARGE PUMP FOR WHITE LED APPLICATIONS
AL3159FSG-7 功能描述:电荷泵 High EFF 2.7V - 5.5V 9-Ch LED 1.2 Mhz RoHS:否 制造商:Maxim Integrated 功能:Inverting, Step Up 输出电压:- 1.5 V to - 5.5 V, 3 V to 11 V 输出电流:100 mA 电源电流:1 mA 最大工作温度:+ 70 C 封装 / 箱体:SOIC-8 Narrow 封装:Tube
AL-317EGW 制造商:A-BRIGHT 制造商全称:A-BRIGHT Inc 功能描述:3mm Round LED Lamps
AL-319EGW-C 制造商:A-BRIGHT 制造商全称:A-BRIGHT Inc 功能描述:3mm Round LED Lamps
AL31BK 制造商:Pentair Technical Products / Hoffman 功能描述:Slotted black latch kit , fits DL Wall-Mtg. , Steel
A-L31BK 制造商:Pentair Technical Products / Hoffman 功能描述:ENCLOSURE ((NW)) 制造商:Pentair Technical Products / Hoffman 功能描述:Slotted black latch kit