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UC1842, UC2842, UC3842, UC1843, UC2843, UC3843 UC1844, UC2844, UC3844, UC1845, UC2845, UC3845
SLUS223H – APRIL 1997 – REVISED OCTOBER 2024
UCx84x Current-Mode PWM Controllers
1 Features
• Optimized for off-line and DC-to-DC converters • Low start-up current (< 1mA) • Automatic feedforward compensation • Pulse-by-pulse current limiting • Enhanced load-response characteristics • Undervoltage lockout with hysteresis • Double-pulse suppression • High-current totem-pole output • Internally trimmed bandgap reference • Up to 500kHz operation • Error amplifier with low output resistance
2 Applications
• Switching regulators of any polarity • Transformer-coupled DC-DC converters
3 Description
The UCx84x series of control integrated circuits provide the features that are necessary to implement off-
UC2844 Datasheet
