Datasheet > AL5809-40QP1-7

AL5809-40QP1-7

更新时间： 2022-02-26 10:21:15

品牌	Logo	应用领域
美台 - DIODES		驱动
页数	文件大小	规格书
12页	520K
描述
AUTOMOTIVE COMPLIANT 60V TWO TERMINAL CONSTANT CURRENT LED DRIVER

阅读下载

中文翻译

获取价格

如果您发现信息不准确，欢迎纠错

AL5809-40QP1-7 数据手册

AL5809Q

Application Information (Cont.)

PWM Dimming

The AL5809Q can be used to provide LED current dimming driving the Out Pin via an external MOSFET switch to Ground (Figure 6a) for high-

side connected LEDs or a high-side switch for Ground-connected LEDs. The Out Pin current is then effectively switched on and off causing the

LED current to turn on and off. The dimming effect can be achieved by varying the PWM signal duty cycle.

a) PWM Dimming by External MOSFET

b) PWM Dimming by Power Supply VIN ON/OFF

Figure 6 PWM Dimming

Recommended PWM Frequency and Dimming Range

Duty Cycle (%)

Minimum Maximum

PWM Frequency

(Hz)

100

200

Test conditions (Figure 6a): PWM frequency 100Hz–200Hz Square

wave, 0-4V gate voltage, V_IN= 6V, 1 LED, AL5809-30mA

Use the following formulae to calculate the Min and Max duty cycle:

Min. Duty cycle (%) =

Max. Duty cycle (%) =

Notes: t_{ON_MIN}= 500µs (Min. value), and t_{OFF_MIN}= 500µs (Min. value) as

listed in the Recommended Operating Conditions – see also Figure 7.

Figure 7 Minimum On Pulse Width (tON_MIN)

PWM Dimming Performance

Figure 8 PWM Dimming 30mA vs. Duty Cycle

Figure 9 Low Duty Cycle Zoomed-in of Figure 7

7 of 12

www.diodes.com

August 2017

AL5809Q

Document number: DS38233 Rev. 2 - 2

1...4 5 678 9 10...12

中文翻译

下载PDF

型号	品牌	描述	获取价格	数据表
AL5809-40S1-7	DIODES	LED Driver,	获取价格
AL5809-50P1-7	DIODES	LED Driver,	获取价格
AL5809-50QP1-7	DIODES	AUTOMOTIVE COMPLIANT 60V TWO TERMINAL CONSTANT CURRENT LED DRIVER	获取价格
AL5809-50S1-7	DIODES	LED Driver,	获取价格
AL5809-60P1-7	DIODES	LED Driver,	获取价格
AL5809-60QP1-7	DIODES	LED Driver,	获取价格