MAX5052

PRODUCTION

Current-Mode PWM Controllers with an Error Amplifier for Isolated/Nonisolated Power Supplies

Isolated/Nonisolated Current-Mode PWM Controllers Work with Universal Offline, Telecom, or 12V Input Voltage

Part Models
3
1ku List Price
Starting From $1.10
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Part Details

  • Available in a Tiny 8-Pin µMAX Package
  • Current-Mode Control
  • 50W Output Power
  • Universal Offline Input Voltage Range
    • Rectified 85VAC to 265VAC (MAX5052)
  • VIN Directly Driven from 10.8V to 24V Input (MAX5053)
  • Digital Soft-Start
  • Programmable Input Startup Voltage
  • Internal Bootstrap UVLO with Large Hysteresis (MAX5052)
  • Internal Error Amplifier with 1% Accurate Reference
  • Thermal Shutdown
  • 45µA (typ) Startup Supply Current
  • 1.4mA (typ) Operating Supply Current
  • Fixed Switching Frequency of 262kHz ±12%
  • 50% Maximum Duty-Cycle Limit (MAX5052A/MAX5053A)
  • 75% Maximum Duty-Cycle Limit (MAX5052B/MAX5053B)
  • 60ns Cycle-by-Cycle Current-Limit Response Time
MAX5052
Current-Mode PWM Controllers with an Error Amplifier for Isolated/Nonisolated Power Supplies
MAX5052, MAX5053: Typical Operating Circuit
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Documentation

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Hardware Ecosystem

Parts Product Life Cycle Description
Flyback, Forward, and Isolated Controller 2
MAX5021 PRODUCTION Current-Mode PWM Controllers for Isolated Power Supplies
MAX5022 PRODUCTION Current-Mode PWM Controllers for Isolated Power Supplies
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Evaluation Kits

MAX5052AEVKIT

Evaluation Kit for the MAX5052A

Features and Benefits

  • +36VDC to +72VDC or -36VDC to -72VDC Input Voltage Range
  • Isolated Outputs
    • VOUT1: +5V Provides Up to 1.5A
    • VOUT2: +15V Provides Up to 100mA
  • ±5% (typ) Load Regulation for the +5V Output (150mA to 1.5A)
  • 83% Efficiency at 48V Input and Full Load
  • Cycle-by-Cycle Current Limit
  • 262kHz Switching Frequency
  • Digital Soft-Start
  • Undervoltage Lockout (UVLO)
  • Designed for 1500V Isolation with Primary-Side Regulation
  • Low-Cost Flyback Design
  • Fully Assembled and Tested

Product Details

The MAX5052A evaluation kit (EV kit) is a fully assembled and tested circuit board that contains a 9W flyback DC-to-DC converter. The circuit is configured for output voltages of +5V and +15V and provides up to 1.5A and 100mA of current at each respective output. Power for the circuit can be provided from either a +36VDC to +72VDC or -36VDC to -72VDC source.

High efficiency up to 83% is achieved using a single-transistor, flyback DC-to-DC converter topology. The surface-mount transformer provides up to 1500V galvanic isolation of both outputs. Low cost is achieved through the use of primary-side regulation while undervoltage lockout (UVLO), digital soft-start, and thermal shutdown provide for a robust 9W isolated power supply.

Operation at 262kHz allows the use of small magnetics and output capacitors.

Warning: The MAX5052A EV kit is designed to operate with high voltages. Dangerous voltages are present on the MAX5052A EV kit and on equipment connected to it. Users who power up the MAX5052A EV kit or power the sources connected to it must be careful to follow safety procedures appropriate to working with high-voltage electrical equipment.

Under severe fault or failure conditions, the MAX5052A EV kit may dissipate large amounts of power, which could result in the mechanical ejection of a component or of component debris at high velocity. Operate MAX5052A EV kit with care to avoid possible personal injury.

Applications

  • 12V Boost Regulators
  • 12V SEPIC Regulators
  • Computer Systems/Servers
  • Industrial Power Conversion
  • Isolated Keep-Alive Circuits
  • Isolated Telecom Power Supplies
  • Networking Systems
  • Universal Input AC Power Supplies

MAX5052AEVKIT
Evaluation Kit for the MAX5052A

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