Document
SFDEB3893F
Specifications and Applications Information
03/03/09 Preliminary Package Configuration
Smar t F or ce LED Smart For orce Driver
The ERG Smart Force Series of LED Drivers are specifically designed for applications which require wide dimming and LCD brightness stability over a wide input voltage range. The SFDEB3893F is designed to provide backlighting for the Sharp LQ150X1LG82. Designed, manufactured and supported within the USA, the SFDE features:
9 9 9 9 9 9
Wide input voltage range Constant LED current External dimming High dimming ratio Soft start One year warranty 3.150 [80,01]
.830 [21,08] 1
Output
.910 [23,11]
2.105 [53,47]
Input Connector Molex 53261-0571 J1-1 J1-2 J1-3 J1-4 J1-5 Vin(+) Vin(+) GND GND Enable
Connectors Output Connector * Molex 53261-1271 J2-1 J2-2 J2-3 J2-4 J2-5 J2-6 Cathode 3 Anode 3 (do not use) (do not use) Cathode 2 Anode 2 J2-7 J2-8 J2-9 J2-10 J2-11 J2-12 (do not use) (do not use) Cathode 1 Anode 1 (do not use) (do not use) .125 [3,18] Dia. (2x) 1 Input .135 [3,43]
1.11 [28,19]
* Requires harness ERG part number H12406XXX recommended
Mass: 13 grams
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PCB components are shown for reference only. Actual product may differ from that shown.
9
8 mm or less in height
SFDEB3893F
Absolute Maximum Ratings
Rating Input Voltage Range Storage Temperature Enable Input Voltage Symbol Vin Tstg VEnable Value -0.3 to +20.0 -40 to +85 0 to Vin Units V dc
o
C
V dc
Operating Characteristics
Unless otherwise noted Vin = 12.00 Volts dc and Ta = 25oC.
Characteristic Input Voltage Component Surface Temperature (Note 1) Input Current Peak Inrush Current (Note 2) LED String Voltage Efficiency Output Current (per string) Enable Pin (Note 3) Turn-on Threshold Turn-off Threshold Enable Input Impedance (Note 4)
Symbol V in Ts I in I peak V LE D h I out
Min +10.0 -20 0.73 28.8 78.0
Typ +12.0 0.86 2.5 32.0 77 82.1
Max +20.0 +80 0.99 34.9 86.2
Units V dc
o
C
A dc A dc V dc % mAdc
Vthon Vthoff REnable
0.8 -
5
2.0 -
V dc V dc kOhms
Specifications subject to change without notice. Note 1 Note 2 Note 3 Note 4 Surface temperature must not exceed 80°C. SOT89 package to be at or below 110°C. SOT89 package is 75°C at 25°C ambient temperature. Peak inrush occurs over a 1 to 3 ms time period, during initial startup. The input voltage to the driver must be within its operating characteristic before the driver is enabled, otherwise the driver may not start or may shut down unexpectedly. Input impedance is 5.0 kOhms to GND.
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SFDEB3893F
Application Information
The ERG SFDEB3893F has been designed to be configured in multiple ways: NO DIMMING • OPERATION: The SFD driver can be configured to operate without dimming by pulling up the Enable Pin (J1-5). • Pins 1 and 2 of connector J1 must be connected to +Vin, between 10 and 20 Vdc. Pins 3 and 4 of connector J1 must be connected to GND. EXTERNAL PWM DIMMING • • • OPERATION: External PWM configuration as shown in Figure 1 allows the user to control d.