CCFL-Inverter SCF-0275 ( For 4W ✕ 4 Lamps ) ■Features ●For CCFL 4 lamps ●Built in On/Off control function ●Regulated lamp current ●Built in PWM Mode dimming control circuit. ●Applications: LCD size 15 inches for monitor Suitable Sanken's CCFL: Lamp length 300 to 340 mm : Exterior Diameter φ2.6mm 120.0± 0.5 113.0± 0.2 (3.5) (3.5) (3.5) ■Outline 50.0± 0.5 4-φ3.0 43.0± 0.2 CN3 CN2 Top View 8.2max CN1 Side View PWB (Printed wiring board): FR-4 or CEM-3 (t =1.0) Weight: 39.5g typ Unit : mm ■Connector terminal number and Function Connector No. CN1✽ (Input) CN 2 (Output 1, 2) CN 3 (Output 3, 4) Terminal No. Symbol Function 1, 2 VIN DC input voltage 3, 4 GND GND 5 Vbr Dimming control 6 N. C 7 Vrmt On-Off control 1 Lamp1-H Output 1 high side 2 Lamp 2-H Output 2 high side 4 Lamp1, 2-L Output 1, 2 low side 1 Lamp 3-H Output 3 high side 2 Lamp 4 -H Output 4 high side 4 Lamp 3, 4-L Output 3, 4 low side Connector type name/Manufacturer S7B-PH-SM3-TB/JST SM03 (7-D1)B-BHS-TB/JST SM03 (7-D1) B-BHS-TB/JST ✽Connect parallel with 1st and 2nd pin, in the same way 3rd and 4th pin too. It's short of current capacity with mono-pin. SCF-0275 ■Standard External Circuit CN1 1, 2 VIN H 12V CN2,3 SW 7 L Lamp(1, 3)-H 1 Lamp(2, 4)-H 2 Lamp-L 4 Vrmt RL 3,4 GND 5 0 to 2.5V Vbr (for Dimming) Cold-Cathode Fluorescent Lamp RL SW H: enable 2.5V to VIN L : disable 0 to 0.5V Inverter Unit ■Absolute maximum ratings Parameter Symbol Ratings Unit DC input voltage VIN 0 to 14.4 V On-Off voltage Vrmt 0 to 14.4 V Dimming voltage Vbr 0 to 3.0 V Output power PL 4.4 W Operating temp. Topr 0 to 60 °C Storage temp. Tstg – 20 to 80 °C Humidity RH 95 %RH Remarks Per 1 lamp Maximum wet-bulb temp. 38°C No dew condensation ■Electrical characteristics Conditions : at Topr=25°C, VIN=12V (unless otherwise stated) min Ratings typ max Parameter Symbol DC input voltage VIN 10.8 12 13.2 V Input current IIN — — 1500 mA VIN=12V Driving frequency fsw 50 55 60 kHz RL=83kΩ Output current IL — 7.0 — mArms Per 1 lamp RL=83kΩ, Vbr=0V — 3.5 — mArms Per 1 lamp RL=83kΩ, Vbr=2.5V Dimming control frequency fPWM 240 300 Hz Output Power PL — 4.7 — W Open voltage VO 1500 — — Vrms ■Dimming characteristics Output Current (mArms) 16.0 IL 2 12.0 IL 1 8.0 4.0 0.0 0.0 0.5 1.0 1.5 2.0 2.5 Dimming voltage (Vbr) 3.0 3.5 (2 Lamps) Remarks Unit RL=83kΩ VIN=10.8V, RL=100MΩ