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MAXREFDES1257: 24W/48V DC-DC Boost Converter Using the MAX17597 Peak-Current-Mode Controller

MAXREFDES1257

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Description

The MAXREFDES1257 is a DC-DC boost power supply that delivers up to 500mA at 48V from an 8V to 14V supply voltage. It is designed for equipment that needs a high-power, 48V output voltage that is generated from a 12V DC bus.

The MAXREFDES1257 employs techniques that use the boost regulator to generate a voltage higher than the input voltage. This document explains how the MAX17597 peak-current-mode controller can be used to generate 48V from 8V to 14V input voltage.

The MAX17597 offers input thresholds suitable for low-voltage DC-DC applications (4.5V to 36V). The MAX17597 implements a boost converter and contains a built-in gate driver for external N-channel MOSFETs.

The MAX17597 houses an internal error amplifier with a 1% accurate reference, eliminating the need for an external reference. The switching frequency is programmable from 100kHz to 1MHz with an accuracy of 8%, allowing optimization of magnetic and filter components, resulting in compact and cost-effective power conversion. For EMI-sensitive applications, the MAX17597 family incorporates a programmable frequency dithering scheme, enabling low-EMI spread-spectrum operation.

Users can start the power supply precisely at the desired input voltage, implement input overvoltage protection and program soft-start time.

A programmable slope compensation scheme is provided to ensure stability of the peak-current-mode control scheme. Hiccup-mode overcurrent protection and thermal shutdown are provided to minimize dissipation in overcurrent and overtemperature fault conditions.

The MAX17597 provides a 95% maximum duty-cycle limit. This device is available in a 3mm x 3mm TQFN package and is rated for operation over the -40°C to +125°C temperature range.

The MAXREFDES1257 is a DC-DC boost power supply that delivers up to 500mA at 48V from an 8V to 14V supply voltage. It is designed for equipment that needs a high-power, 48V output voltage that is generated from a 12V DC bus.

 

Schematic

schematic

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PCB Layout

pcb-layout

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BOM

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Test Results

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Parametrics

Input Type Vin(Min) Vin(Max) Iout(Max) Single/Multiple Output Vout(V) Pout(W) Isolated/Non-Isolated Topology
DC 8 14 0.5 Single 48 24 Non-isolated Boost

Parametrics

Input Type DC
Vin(Min) 8
Vin(Max) 14
Iout(Max) 0.5
Single/Multiple Output Single
Vout(V) 48
Pout(W) 24
Isolated/Non-Isolated Non-isolated
Topology Boost

Maxim Devices (1)

Part Number Name Product Family Order Design kits and evaluation modules
MAX17597 Peak-Current-Mode Controllers for Flyback and Boost Regulators Isolated Power Buy Now

Maxim Devices (1)

Part Number Product Family
Isolated Power
Peak-Current-Mode Controllers for Flyback and Boost Regulators

Design Files (4)

Title Type Size Date
MAXREFDES1257 BOM CSV 3KB 2021-08-01
MAXREFDES1257 PCB Layout PDF 487KB 2021-08-01
MAXREFDES1257 Schematic PDF 174KB 2021-08-01
MAXREFDES1257 Test Result PDF 181KB 2021-08-01
Date Type
2021-08-01

MAXREFDES1257 BOM

(CSV, 3KB)

2021-08-01

MAXREFDES1257 PCB Layout

(PDF, 487KB)

2021-08-01

MAXREFDES1257 Schematic

(PDF, 174KB)

2021-08-01

MAXREFDES1257 Test Result

(PDF, 181KB)

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