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

MAXREFDES1257

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説明

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.

 

回路図

schematic

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PCBレイアウト

pcb-layout

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部品表(BOM)

design-files

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試験結果

bom

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パラメトリック

入力タイプ Vin(Min) Vin(Max) Iout(Max) シングル/マルチ出力 Vout(V) Pout(W) 絶縁型/非絶縁型 トポロジ
DC 8 14 0.5 Single 48 24 Non-isolated Boost

パラメトリック

入力タイプ DC
Vin(Min) 8
Vin(Max) 14
Iout(Max) 0.5
シングル/マルチ出力 Single
Vout(V) 48
Pout(W) 24
絶縁型/非絶縁型 Non-isolated
トポロジ Boost

マキシムデバイス (1)

型番 名称 製品ファミリ 注文 設計キットおよび評価モジュール
MAX17597 ピーク電流モードコントローラ、フライバックおよびブーストレギュレータ用 絶縁型電源 今すぐ購入

マキシムデバイス (1)

型番 製品ファミリ
絶縁型電源
ピーク電流モードコントローラ、フライバックおよびブーストレギュレータ用

設計ファイル (4)

タイトル 種類 サイズ 日付
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
日付 種類
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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