iT6801

iT6801 SELF-OSCILLATING HALF-BRIDGE DRIVER 1. Description iT6801 is a half-bridge driver with programmable oscillator within a SOP-8L package to drive both lower MOSFET and floating upper MOSFET. It is suitable for electronic ballast of fluorescent lamp. It is equipped with internal clamp of 17.2 V zener diode, so the VCC voltage is easily regulated. For proper operation assurance and low power startup, it is designed with internal under voltage lockout (UVLO), so it takes little current for supply capacitor voltage to builds up. Oscillator frequency is controlled by the current drawn out from RT, which acts as minimum base frequency. The same current is duplicated internally to double base frequency for preheat. 2. Features Built in preheat function Lamp open or End-Of-Life detection Micro power start-up Integrated 600 V half-bridge gate driver Increased under-voltage lockout Hysteresis Lower power level-shifting circuit Constant LO, HO pulse widths at startup Lower di / dt gate driver for better noise immunity z Excellent latch immunity on all inputs and outputs z z z z z z z z 3. Applications z Electronic Ballast 4. Pin Assignments 1 2 3 4 V CC FB RT COM VB HO VS LO 8 7 6 5 S O P -8L 5. Marking Information Product Name iT6801 Marking iT6801 XXXXX X : Date Code 1 Version 1.0 iT6801 6. Ordering Code Assembly Material G: Halogen and Lead Free Device Note: inergy defines “ Green ” as lead-free (RoHS compliant) and halogen free (Br or Cl does not exceed 900 ppm by weigh...