Datasheet Summary
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19-5331; Rev 0; 6/10
Active-Clamped, Spread-Spectrum, Current-Mode PWM Controllers
General Description
The MAX5974_ provide control for wide-input-voltage, active-clamped, current-mode PWM, forward converters in Power-over-Ethernet (PoE) powered device (PD) applications. The MAX5974A/MAX5974C are well-suited for universal or tele input range, while the MAX5974B/ MAX5974D also acmodate low input voltage down to 10.5V. The devices include several Features to enhance supply efficiency. The AUX driver recycles magnetizing current instead of wasting it in a dissipative clamp circuit. Programmable dead time between the AUX and main driver allows for zero-voltage...