The LED-21215 driving board is designed to drive 2 strings of LED backlight module. LED-21215 is able to drive upto 10 white LEDs in series per string with constnat current. Onboard high quality converter drives LED strings and control the dimming of LED strings independently.It is a high efficiency and low profile driving board. Wide diming control allow users to set LED brightness smoothly. Additional power protection feature is able to protect LED module from damage by overcurrent or overvoltage.

Applicable to 2 LED strings
Low profile and compact design
Constant LED current (15mA)
PWM/Or DC Voltage Dimming Control
Short circuit and overload protection
External power On/Off control

Mechanical Characteristics

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

LCD Application

LCD Model: OPTREX-T55226D043J-LW-A-AAN

Operating Condition

Item Symbol Conditions MIN MAX Unit Input Voltage Vin 3.3 15 V Operating Temperature Top Ha≦90%RH -20 85 ℃ Storage Temperature Tstg Ha≦95%RH -30 100 ℃ Operating Humidity Hop Ta=0~55℃ 20 90 %RH Storage Humidity Hstg Ta=20~80℃ - 95 %RH

Operating Characteristics

Unless otherwise noted Vin=12 Volts DC and T=25°C Item Symbol MIN TYP MAX Unit Input Voltage Vin 3.3 12.0 15 V Input Current I-in 310 320 340 mA LED String Voltage V-led - 16 17.5 V Efficiency H 78 80 82 % PWM Control Duty Ratio 10 - 100 % PWM Control Frequency 180 - 25K HZ PWM Swing Voltage 2.0 - 5.5 V Output Current (per String) I-out 13.5 15 16.3 mA DC Voltage Dimming Control 0 5 V

(CN1) Input Connector

Pin No. Symbol Description 1 BKLT DC+12V 2 BKLT DC+12V 3 GND Ground 4 GND Ground 5 ENA Enable (ON=+5V ; OFF=0V) 6 Brightness PWM/DC Voltage 7 AR NC

(CN2) Input Connector

Pin No. Symbol Description 1 LEDIN1 Anode1 2 LEDIN2 Anode2 3 LEDIN3 NC 4 LEDIN4 NC 5 LEDIN5 NC 6 LEDIN6 NC 7 LEDO1 Cathod1 8 LEDO2 Cathod2 9 LEDO3 NC 10 LEDO4 NC 11 LEDO5 NC 12 LEDO6 NC 13 ENA Enable 14 Brightness Dimming Control 15 VCC NC