CCFL-Inverter SCF-0274 ( For 4.7W ✕ 2 Lamps ) ■Features ●For CCFL 2 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 ■Outline 66.5± 0.2 CN3 CN2 CN1 25± 0.5 Top View 18± 0.2 (3.5) (3.5) 180.0 ± 0.5 80 .0 ± 0.2 8.0max 3-φ3.0 Side View PWB (Printed wiring board): FR-4 or CEM-3(t =1.0) Weight: 29.6g typ Unit : mm ■Connector terminal number and Function Connector No. Terminal No. Symbol Function 1 VIN DC input voltage 2 GND GND 3 Vbr Dimming control 4 N. C 5 Vrmt On-Off control CN 2 (Output 1) 1 Lamp1-H Output 1 high side 3 Lamp1-L Output 1 low side CN 3 (Output 2) 1 Lamp 2-H Output 2 high side 3 Lamp 2-L Output 2 low side CN 1 (Input) Connector type name/Manufacturer S5B-PH-SM3-TB/JST SM02(8.0)B-BHS-TB/JST SM02(8.0) B-BHS-TB/JST SCF-0274 ■Application CN1 H 12V 1 VIN 5 Vrmt 2 GND 3 Vbr CN2, 3 SW L 0 to 2.5V SW H: enable 2.5V to VIN L : disable 0 to 0.5V Lamp-H 1 Lamp-L 3 RL Cold-Cathode Fluorescent Lamp 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 5.0 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 Driving frequency fsw 50 55 60 kHz — 8.0 — mArms Per 1 lamp RL=73kΩ, Vbr=0V — 2.5 — mArms Per 1 lamp RL=73kΩ, Vbr=2.5V 300 Hz Output current IL Dimming control frequency fPWM 240 Output Power PL — 4.7 — W Open voltage VO 1500 — — Vrms ■Dimming characteristics PWM Dimming Vbr=0 to 0.65V ➝ Duty 100% Output Current (mArms) 9.0 8.0 6.0 4.0 2.0 0.0 0.0 0.5 1.0 1.5 2.0 Dimming voltage (Vbr) 2.5 3.0 Remarks Unit VIN=12V RL=73kΩ RL=73kΩ VIN=10.8V, RL=100MΩ