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LED-Backlight-Ansteuerung

LED-252280

Produktkatalog

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Auswahlsanleitung

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The LED-252280 driving board is designed to drive LED backlight module. It is a constant frequency and current mode controller especially applied for LED arrays. In constant current LED applications, the LED-252280 provides an especially wide PWM dimming range, which allows PWM pulse widths as short as several converter switching periods.
Additional power protection feature is able to protect LED module from damage by overcurrent and overvoltage.

High dimming ratio (3000:1)

Low profile and compact design

Constant LED current (280mA)

PWM dimming control

Short circuit and overload protection

External power On/Off control

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Mechanical Characteristics

Dimension (L x W x H): 100mm x 30mm x 7.5mm
Weight: 24g

LCD Application

LCD Model: Prime View-PD080SL3

Operating Condition

Item	Symbol	Condition	Min.	Max.	Unit
Input Voltage	Vin		3.3	15	V
Operating Temperature	Top	Ha≦90%RH	-20	85	°C
Storage Temperature	Tstg	Ha≦95%RH	-30	100	°C
Operating Humidity	Hop	Ta=0 ~ 55°C	20	90	%RH
Storage Humidity	Hstg	Ta=20 ~ 80°C	-	95	%RH

Operating Characteristics

Unless otherwise noted Vin=5 Volts DC and T=25°C

Item	Symbol	Min.	Typ.	Max.	Unit
Input Voltage	Vin	3.3	12	15	V
Output Voltage	V-led	-	11	-	V
Dimming Ratio	H		3000:1
Output Current	I-out	-	280	-	mA
PWM Control Duty Ratio		10	-	100	%
PWM Control Frequency		180	-	25K	HZ
PWM Swing Voltage		2.0	-	5.5	V
Brightness Control		5		0	V

(CN1) Input Connector

Pin No.	Symbol	Description
1	BKLT	VDD
2	BKLT	VDD
3	GND	Ground
4	GND	Ground
5	ENA	Enable ( ON=+5V; OFF=0V)
6	PWM	Brightness Control (0V-MAX, +5V-MIN)
7	AR	NC

(CN8) Output Connector

Pin No.	Symbol	Description
1	Vout	Anode
2	LGND	Cathod

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