Download the MAX5974B datasheet PDF.
This datasheet also covers the MAX5974A variant, as both devices belong to the same current-mode pwm controllers family and are provided as variant models within a single manufacturer datasheet.
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.
Key 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 switching (ZVS). Under lightload conditions, the devices reduce the switching frequency (frequency foldback) to reduce switching losses. The MAX5974A/MAX5974B feature unique circuitry to achieve output regulation without using an optocoupler, while the MAX5974C/MAX5974D utilize the traditiona.
Note: The manufacturer provides a single datasheet file (MAX5974A_MaximIntegratedProducts.pdf) that lists specifications for multiple related part numbers.
Full PDF Text Transcription for MAX5974B (Reference)
Note: Below is a high-fidelity text extraction (approx. 800 characters) for
MAX5974B. For precise diagrams, and layout, please refer to the original PDF.
www.DataSheet4U.com 19-5331; Rev 0; 6/10 Active-Clamped, Spread-Spectrum, Current-Mode PWM Controllers General Description The MAX5974_ provide control for wide-input-vol...
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rs 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 telecom input range, while the MAX5974B/ MAX5974D also accommodate 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 switching (ZVS).
More Datasheets from Maxim Integrated (now Analog Devices)
MAX5974B Datasheet
