Features: • Backlight Lamp Ballast and Soft Dimming• Reduce the Number of Components• Wide Range Operating Voltage 9-30V• Precision Voltage Reference Trimmed to 3.4%• Low Standby Current (Typ. 150uA)• Soft Start Function• Dual PWM Control• Analog &am...
FAN7548: Features: • Backlight Lamp Ballast and Soft Dimming• Reduce the Number of Components• Wide Range Operating Voltage 9-30V• Precision Voltage Reference Trimmed to 3.4%• L...
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Characteristics | Symbol | Value | Unit |
Supply Voltage | VCC | 6~30 | V |
Operating Temperature Range | Topr | -25 ~ 85 | °C |
Storage Temperature Range | Tstg | -65 ~ 150 | °C |
Thermal Resistance Junction-Air (Note1,2) | RJA | 112 | °C/W |
Power Dissipation | Pd | 1.1 | W |
The FAN7548 provides the necessary circuit blocks to implement a highly efficient CCFL backlight power supply in a small footpirnt 20 SSOP package. The device features two control stages for operating independent resonant tanks for multi-lamp designs.
External parts count is minimized and system cost is reduced by integration such features as a feedback controlled PWM driver stage, the soft start, the open lamp regulation, the open lamp protection, the UVLO, and the self synchronization circuitry between the buck and Royer stages. It includes an internal shunt regulator, allowing it to operate with input voltage from 9 to 30V. It supports analog and burst dimming modes of operation. It providees the open lamp regulation, and the open lamp protection.