The document describes the features and characteristics of the TPS68000 highly efficient phase shift full bridge CCFL controller, including input voltage range, full bridge topology with integrated gate drives, synchronizable constant frequency operation, etc.
The TPS68000 provides a power‑supply controller solution for CCFL backlight applications, supporting an input voltage range of 8 V to 30 V and integrated gate drives for four NMOS switches. It offers programmable phase‑delay, analog and burst dimming, and protection features such as open‑lamp, short‑circuit, over‑temperature, and undervoltage lockout.
The device is supplied in a 30‑pin TSSOP package (6.4 mm × 7.8 mm) and includes detailed pin assignments, electrical characteristics, and recommended operating conditions for designers of desktop monitors, LCD TVs, and notebook backlights.
| Input voltage range | 8 V to 30 V |
|---|---|
| Supply voltage (VCC) operating range | 8.0 V to 30 V |
| Operating temperature range | -40 °C to 85 °C |
| Maximum junction temperature | -40 °C to 150 °C |
The device operates with an input voltage from 8 V up to 30 V.
An automatic strike control smoothly increases lamp voltage by sweeping the operating frequency across the resonant circuit until the lamp current reaches a level for the current control loop to take over.
The controller provides open‑lamp, short‑circuit, over‑temperature, undervoltage lockout, and internal over‑temperature protection.