MAX5053
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MAX5053

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

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

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Info: : PRODUCTION tooltip
Part Details
Part Models 4
1ku List Price Starting From $1.80
Features
  • 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
Additional Details
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The MAX5052/MAX5053 current-mode PWM controllers contain all the control circuitry required for the design of wide-input-voltage isolated and nonisolated power supplies. The MAX5052 is well suited for universal input (rectified 85VAC to 265VAC) or telecom (-36VDC to -72VDC) power supplies. The MAX5053 is well suited for low-input-voltage (10.8VDC to 24VDC) power supplies.

The MAX5052/MAX5053 contain an internal error amplifier that regulates the tertiary winding output voltage. This implements a primary-side regulated, isolated power supply, eliminating the need for an optocoupler. An input undervoltage lockout (UVLO) is provided for programming the input-supply start voltage and to ensure proper operation during brownout conditions. The input-supply start voltage is externally programmable with a voltage-divider. To shutdown the device, the UVLO pin is pulled low. Internal digital soft-start reduces output voltage overshoot. The internal thermal shutdown circuit protects the device in the event the junction temperature exceeds +130°C.

The MAX5052 has an internal bootstrap UVLO with large hysteresis that requires a minimum voltage of 23.6V for startup. The MAX5053 does not have the internal bootstrap UVLO and can be biased directly from a minimum voltage of 10.8V.

The 262kHz switching frequency is internally trimmed to ±12% accuracy; this allows the optimization of the magnetic and filter components resulting in compact, cost-effective power supplies. The MAX5052A/MAX5053A are offered with a 50% maximum duty-cycle limit. The MAX5052B/MAX5053B are offered with a 75% maximum duty-cycle limit. These devices are available in 8-pin µMAX packages and operate over the -40°C to +85°C temperature range.

Applications

  • 12V Boost Regulators
  • 12V SEPIC Regulators
  • Computer Systems/Servers
  • Industrial Power Conversion
  • Isolated Keep-Alive Circuits
  • Isolated Telecom Power Supplies
  • Networking Systems
  • Power Supplies
  • Universal Input AC
Part Models 4
1ku List Price Starting From $1.80

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
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Product Lifecycle

PCN

Sep 19, 2018

- 1753N

ASSEMBLY

MAX5053AEUA+

PRODUCTION

MAX5053AEUA+T

PRODUCTION

MAX5053BEUA+

PRODUCTION

MAX5053BEUA+T

PRODUCTION

Filter by Model

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Part Models

Product Lifecycle

PCN

Sep 19, 2018

- 1753N

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ASSEMBLY

MAX5053AEUA+

PRODUCTION

MAX5053AEUA+T

PRODUCTION

MAX5053BEUA+

PRODUCTION

MAX5053BEUA+T

PRODUCTION

Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 1

MAX5052AEVKIT

Evaluation Kit for the MAX5052A

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MAX5052AEVKIT

Evaluation Kit for the MAX5052A

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 Detail

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

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