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Description
The AP5724 is a step-up DC/DC converter specifically designed to
drive white LEDs with a constant current. The device can drive 2 ~ 6
Pb
AP5724
WHITE LED STEP-UP CONVERTER
Pin Assignments
(Top View)
LEDs in series from a Li-Ion cell. Series connection of the LEDs
provides identical LED currents resulting in uniform brightness and
SW
1
6
V IN
eliminates the need for ballast resistors. For driving higher number of
LEDs, AP5724 also supports a single feedback of parallel connected
GND
2
5
OVP
multiple strings of equal number of LEDs.
The AP5724 switches at 1.2MHz that allows the use of tiny external
FB
3
74
EN
components. A low 0.1V feedback voltage minimizes power loss in
the current setting resistor for better efficiency
Features
SOT26 / TSOT23-6
(Top View)
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High Efficiency: 84% Typical
Fast 1.2MHz Switching Frequency
Current Limit and UVLO Protections
Internal Thermal Shutdown
SW
V IN
OVP
1
2
3
6
5
4
GND
FB
EN
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Internal Over Voltage Protection
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Integrated Soft-Start Function
SOT26, TSOT26 and U-DFN2020-6: Available in “Green”
Molding Compound (No Br, Sb)
Lead-Free Finish; RoHS Compliant (Notes 1 & 2) ?
U-DFN2020-6
Applications
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Cellular Phones
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PDAs, Hand held Computers
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Digital Cameras
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MP3 Players
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GPS Receivers
Notes:
1. EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant. All applicable RoHS exemptions applied.
2. See http://www.diodes.com/quality/lead_free.html for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green"
and Lead-free.
Typical Applications Circuit
V IN
C IN
1uF
L1
22uH
V IN
SW
D1
2~6 LEDs
C OUT
1uF
FB
ON OFF
PWM Dimming
AP5724
Document number: DS31843 Rev. 4 - 2
AP5724 OVP
EN
GND
Figure 1 Typical Application Circuit
1 of 15
www.diodes.com
R SET
5
December 2013
? Diodes Incorporated
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相关代理商/技术参数
AP5724WUG-7 功能描述:开关变换器、稳压器与控制器 WH LED STEP-UP DC/DC CONV 2-6 LED 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
AP5725 制造商:DIODES 制造商全称:Diodes Incorporated 功能描述:WHITE LED STEP-UP CONVERTER
AP5725_10 制造商:DIODES 制造商全称:Diodes Incorporated 功能描述:WHITE LED STEP-UP CONVERTER
AP5725FDCG-7 功能描述:开关变换器、稳压器与控制器 WH LED STEP-UP DC/DC CONV 2-6 LED 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
AP5725WG-7 功能描述:开关变换器、稳压器与控制器 WH LED STEP-UP DC/DC CONV 2-6 LED 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
AP5725WUG-7 功能描述:开关变换器、稳压器与控制器 WH LED STEP-UP DC/DC CONV 2-6 LED 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
AP5726 制造商:DIODES 制造商全称:Diodes Incorporated 功能描述:WHITE LED STEP-UP CONVERTER
AP5726_10 制造商:DIODES 制造商全称:Diodes Incorporated 功能描述:WHITE LED STEP-UP CONVERTER