- 您现在的位置：买卖IC网 > Sheet目录310 > AL5801W6-7 (Diodes Inc)IC LED DRVR HIGH BRIGHT 26SOT
AL5801
PWM Dimming
(a)
(b)
Figure 16 Application Circuits for LED Driver with PWM Dimming Functionality (a) MOSFET driving and (b) Transistor driving
PWM dimming can be achieved by driving the BIAS pin (1). An external open-collector NPN transistor or open-drain N-channel MOSFET can be
used to drive the BIAS pin as shown in Figure 16. Dimming is achieved by turning the LEDs ON and OFF for a portion of a single cycle. The
PWM signal can be provided by a micro-controller or by analog circuitry.
Figure 17 shows the LED current against the PWM signal duty ratio when the AL5801 is used to drive three series connected LEDs from a 12V
supply. The PWM dimming frequency is set to 200Hz. The PWM signal is supplied to the open-Drain small signal MOSFET’s gate as shown in
Figure 16a. The BIAS pin signal is an inversion of the PWM drive to the MOSFET’s gate. Therefore, a PWM signal duty cycle of 0% provides the
maximum LED current. Sufficiently large PCB copper area is used for heat sinking of the AL5801 in order to minimize the device self-heating at
+25 °C ambient.
Figure 17 LED Current against PWM Dimming Signal Duty Ratio at 200Hz PWM Frequency
AL5801
Document number: DS35555 Rev. 3 - 2
9 of 11
www.diodes.com
July 2012
? Diodes Incorporated
发布紧急采购，3分钟左右您将得到回复。
相关PDF资料
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
ALC60481R05
PWR SUP AC-DC 6-48V 1.05A 50.4W
ALV100362R5
POWER SUPPLY AC-DC 36V 2.5A 90W
相关代理商/技术参数
AL5801W6Q-7
制造商:Diodes Incorporated 功能描述:DISCRETE LED DRIVER SOT26 T&R 3K - Tape and Reel
AL5802
制造商:DIODES 制造商全称:Diodes Incorporated 功能描述:30V, ADJUSTABLE CURRENT SINK LINEAR LED DRIVER
AL5802-7
功能描述:LED照明驱动器 Discrete LED Driver Driver,SOT26,3K
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
AL5802EV1
功能描述:AL5802 1, Non-Isolated Output LED Driver Evaluation Board 制造商:diodes incorporated 系列:- 零件状态:有效 电流 - 输出/通道:120mA 输出和类型:1，非隔离 电压 - 输出:- 特性:- 电压 - 输入:4.5 V ~ 30 V 所含物品:板 使用的 IC/零件:AL5802 标准包装:1
AL5802LP4-7
功能描述:LED 驱动器 IC 1 输出 线性 PWM 调光 100mA X2-DFN1310-6 制造商:diodes incorporated 系列:- 包装:剪切带（CT） 零件状态:有效 类型:线性 拓扑:- 内部开关:是 输出数:1 电压 - 供电（最低）:4.5V 电压 -?供电（最高）:30V 电压 - 输出:30V 电流 - 输出/通道:100mA 频率:- 调光:PWM 应用:标牌 工作温度:-40°C ~ 125°C（TA） 安装类型:表面贴装 封装/外壳:6-XFDFN 裸露焊盘 供应商器件封装:X2-DFN1310-6 标准包装:1
AL5802LP-7
功能描述:LED 驱动器 IC 1 输出 线性 PWM 调光 150mA U-DFN1616-6 制造商:diodes incorporated 系列:- 包装:剪切带（CT） 零件状态:有效 类型:线性 拓扑:- 内部开关:是 输出数:1 电压 - 供电（最低）:4.5V 电压 -?供电（最高）:30V 电压 - 输出:30V 电流 - 输出/通道:150mA 频率:- 调光:PWM 应用:标牌 工作温度:-40°C ~ 125°C（TA） 安装类型:表面贴装 封装/外壳:6-XFDFN 裸露焊盘 供应商器件封装:U-DFN1616-6 标准包装:1
AL5802LPL-7
功能描述:FUNCTIONAL ARRAY U-DFN3030-6 T&R 制造商:diodes incorporated 系列:* 零件状态:有效 标准包装:3,000
AL5802QW6-7
功能描述:LED 驱动器 IC 1 输出 线性 PWM 调光 120mA SOT-26 制造商:diodes incorporated 系列:- 包装:剪切带（CT） 零件状态:过期 类型:线性 拓扑:- 内部开关:是 输出数:1 电压 - 供电（最低）:4.5V 电压 -?供电（最高）:30V 电压 - 输出:0.8 V ~ 30 V 电流 - 输出/通道:120mA 频率:- 调光:PWM 应用:标牌 工作温度:-40°C ~ 125°C（TA） 安装类型:表面贴装 封装/外壳:SOT-23-6 供应商器件封装:SOT-26 标准包装:1