L6699 is an enhanced high-voltage resonant controller with symmetrical duty cycle, variable frequency control and resonant half bridge. It also features self-adjusting adaptive deadtime, high-accuracy oscillator, 2-level OCP, PFC controller interface, anti-capacitive-mode protection, light load burst-mode operation, input for brownout protection or power-on/off sequencing, and “Safe-start” procedure prevents hard switching at startup. The device is compatible with 600 V rails and features an integrated bootstrap diode and high dv/dt immunity high-side gate driver, as well as -300/800 mA high-side and low-side gate drivers with UVLO pull-down. It is packaged in SO16N and is suitable for LCD TVs, desktop and AIO PCs, servers, Telecom power, AC-DC adapter, and open frame SMPS.
The L6699 is a double-ended controller designed specifically for series-resonant half bridge topologies, supporting both LLC and LCC configurations. It provides symmetrical complementary duty cycle control and output voltage regulation through frequency modulation. The device features a high-accuracy externally programmable oscillator and an integrated bootstrap diode capable of withstanding more than 600 V.
| Junction temperature operating range | -40 to 150 °C |
|---|---|
| Storage temperature | -55 to 150 °C |
| Max. thermal resistance, junction-to-ambient | 120 °C/W |
| Power dissipation @tamb = 50 °C | 0.83 W |
The device can operate with a junction temperature ranging from -40 to 150 °C.
The capacitor is charged by 350 µA current pulses whenever the voltage on the ISEN pin exceeds 0.8 V.