ISL78223 Datasheet | Intersil

feature set are average current monitoring and soft-start. The average current signal may be used for average current limiting, current sharing circuits and average current mode control. Additionally, the ISL78223 supports both voltage- and current-mode control. The ISL78223 features plemented PWM outputs for synchronous rectifier (SR) control. The plemented outputs may be dynamically advanced or delayed relative to the PWM outputs using an external control voltage. This advanced Bi CMOS design features precision deadtime and resonant delay control, and an oscillator adjustable to 2MHz operating frequency. Additionally, Multi-Pulse Suppression ensures alternating output pulses at low duty cycles where pulse skipping may occur. The ISL78223 is AEC - Q100 rated. The ISL78223 is rated for the automotive temperature range (-40°C to +105°C). Features - Adjustable resonant delay for ZVS operation - Synchronous rectifier control outputs with adjustable delay/advance - Voltage- or current-mode control - 3% current limit threshold - Adjustable average current limit - Adjustable deadtime control - 175µA start-up current - Supply UVLO - Adjustable oscillator frequency up to 2MHz - Internal over-temperature protection - Buffered oscillator sawtooth output - Fast current sense to output delay - Adjustable cycle-by-cycle peak current limit - 70ns leading edge blanking - Multi-pulse suppression - AEC - Q100 qualified - Pb-free (Ro HS pliant) Applications - ZVS full-bridge converters - Tele and data power - Wireless base station power - File server power - Industrial power systems December 7, 2013 FN7936.2 FIGURE 1. BOARD LAYOUT EFFICIENCY 10.0 0.95 0.90 0.85 0.80 0.75 0.70 0.65 VIN = 250V VIN = 350V VIN = 450V VO =...