Datasheet > AMLDLW-3035Z

AMLDLW-3035Z

更新时间： 2024-01-10 10:34:16

品牌	Logo	应用领域
AIMTEC		驱动器
页数	文件大小	规格书
11页	322K
描述
Up to 1000mA \| LED Driver

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中文翻译

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数据手册

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AMLDLW-3035Z 数据手册

Series AMLDLW-Z

Up to 1000mA | LED Driver

Recommended Class B EMI Filter:

Model Number

Inductor Value (µH)

+Vout

-Vout

+Vin

-Vin

1^stLED

AMLDLW-3035Z

AMLDLW-3050Z

AMLDLW-3070Z

AMLDLW-30100Z

10uF

AMLDLW-Z

Last LED

VADJ

Analogue DIM

PWM Dim/ON/OFF

Thermal Feedback Circuit

+Vin

4.7K

+Vout

BZX284C6V2

+Vin

VADJ

1^stLED

10K

AMLDLW-Z

-Vin

10K

-Vout

10K

Last LED

Thermistor

B 3900

GND

Thermally Connected

The selection of components for the thermal feedback circuit is depends on the choice of R2 and R3 and the effectiveness of

the LED heatsink. To optimize the LED brightness control at high temperatures, the LEDs must have a sufficient thermal

extraction path, if not the reduction in drive current will not be optimal.

The thermal control threshold points are set by adjusting R2. Three values (33K, 22K, and 10K) were tested. These values

were chosen to provide thermal break points of approximately 25ºC, 40ºC, and 60ºC.

Note, that the LED drive current will not continually dim to zero – the thermal controls applying DC control to that VADJ pin

has a dimming ratio from maximum current of approximately 5:1.

Once the reduced DC level drops below the shutdown threshold of around 200mV, the LED drive current will fall to zero and

the LEDs will be off.

The slope of the current reduction is determined by the beta value of the thermistor. The larger the Beta value the sharper

will be the resultant current control response. The slope of the current reduction is also affected by Q1’s base emitter voltage

variation with temperature.

www.aimtec.com

F 051e R9

Tel: +1 514 620 2722

6 of 11

Toll free: + 1 888 9 AIMTEC

(924 6832)

North America only

1...3 4 567 8 9...11

中文翻译

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