Status
All versions are Not Recommended for New Designs.
Description
The MAX5042/MAX5043 isolated multimode PWM power
ICs feature integrated switching power MOSFETs connected
in a voltage-clamped, two-transistor, power-circuit
configuration. These devices operate from a wide 20V to
76V input voltage range. The MAX5042 includes a hotswap
controller for use with an external power MOSFET to
limit inrush current for applications where the power supply
is plugged into a live power backplane. The MAX5043
does not include a hot-swap controller.
The voltage-clamped power topology of the MAX5042/MAX5043 enables full recovery of stored magnetizing
and leakage inductive energy for enhanced efficiency
and reliability. Operating at up to 500kHz switching frequency,
these devices provide up to 50W of output
power. The MAX5042/MAX5043 allow the implementation
of both forward and flyback voltage or current-mode
converter topologies. A dedicated latched external shutdown
provides protection in addition to internal thermal
shutdown.
The MAX5042/MAX5043 achieve higher efficiency when
used with secondary-side synchronous rectification.
These devices generate a look-ahead signal for driving
secondary-side synchronous rectifiers.
The MAX5042/MAX5043 are rated for operation over the
-40°C to +125°C and -40°C to +85°C temperature
range, respectively, and are available in a small surfacemount
56-pin thin QFN package.
Warning: The MAX5042/MAX5043 are designed to work with high voltages. Exercise caution.
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