High Performance Current Mode Controllers
The UC3842B, UC3843B series are high performance fixed frequency current mode controllers. They are specifically designed for OffâLine and DCâDC converter applications offering the designer a costâeffective solution with minimal external components. These integrated circuits feature a trimmed oscillator for precise duty cycle control, a temperature compensated reference, high gain error amplifier, current sensing comparator, and a high current totem pole output ideally suited for driving a power MOSFET.
Features
⢠Trimmed Oscillator for Precise Frequency Control
⢠Oscillator Frequency Guaranteed at 250 kHz
⢠Current Mode Operation to 500 kHz
⢠Automatic Feed Forward Compensation
⢠Latching PWM for CycleâByâCycle Current Limiting
⢠Internally Trimmed Reference with Undervoltage Lockout
⢠High Current Totem Pole Output
⢠Undervoltage Lockout with Hysteresis
⢠Low Startup and Operating Current
⢠This is a PbâFree and HalideâFree Device
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