MAX5052AEUA+

The MAX5052AEUA+ is a current mode PWM controller with an error amplifier for isolated/nonisolated power supplies in 8 pin µMAX package. It contains all control circuitry required for design of wide input voltage isolated/nonisolated power supplies. The MAX5052 is well suited for universal input (rectified 85VAC to 265VAC) or telecom (-36VDC to -72VDC) power supplies. It contains an internal error amplifier that regulates tertiary winding output voltage. This implements primary side regulated isolated power supply eliminating need for an optocoupler. An input UVLO is provided for programming input supply start voltage and to ensure proper operation during brownout conditions. The MAX5052 has an internal bootstrap UVLO with large hysteresis that requires minimum voltage of 23.6V for start-up. The 262KHz switching frequency is internally trimmed to ±12% accuracy which allows optimization of magnetic and filter components resulting in compact, cost effective power supplies.

• Internal error amplifier with 1% accurate reference
• Operating temperature range from -40°C to 85°C
• 50W output power
• Programmable input start-up voltage
• Voltage gain error amplifier of 80dB and unity gain bandwidth of 2MHz
• 45μA start-up supply current and 1.4mA operating supply current
• Maximum duty cycle limit of 50%
• 60ns cycle by cycle current limit response time
• Propagation delay from comparator input to NDRV of 60ns (50mV overdrive)
• Digital soft-start and thermal shutdown

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Power Management

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