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2022-09-24 23:18:44
MAX5042-Dual switching power supply IC with integrated power MOSFETs and hot-swap controller
General description
The MAX5042/MAX5043 isolated multimode PWM power ICs feature integrated switching power MOSFETs connected in a voltage-clamped, dual-transistor, power circuit configuration. These devices operate from a 20V to wide 76V input voltage range. The MAX5042 includes a hot-swappable controller for use with external power MOSFETs to limit inrush current in applications where the power supply has been plugged into a live backplane. The MAX5043 does not include a hot-swap controller. The voltage-clamped power topology in the MAX5042/MAX5043 can store full recovery of magnetization and leakage inductance energy, improving 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 voltage- or current-mode converter topologies for both excitation and flyback. Dedicated external latch shutdown provides protection in addition to internal thermal shutdown. The MAX5042/MAX5043 achieve higher efficiency when used for secondary synchronous rectification. These devices generate a secondary-side synchronous rectifier driving a look-ahead signal. The MAX5042/MAX5043 are rated for operation over the -40°C to +125°C and -40°C to +85°C temperature ranges, respectively, and are available in a small surface-mount 56-pin thin QFN package.