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MAX5974AETE+T

电源驱动器, PWM, 20V-17V电源, 600 kHz, TQFN-16

MAXIM INTEGRATED PRODUCTS MAX5974AETE+T
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制造商产品编号:
MAX5974AETE+T
库存编号
2517200
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产品概述

The MAX5974AETE+T is an active-clamped, spread-spectrum, current-mode PWM controller in 16 pin TQFN package. It provide control for wide-input-voltage, active-clamped, current-mode PWM, forward converters in power-over-Ethernet (PoE) powered device (PD) applications. It is well suited for universal or telecom input range. The device include several features to enhance supply efficiency. The AUX driver recycles magnetizing current instead of wasting it in a dissipative clamp circuit. Programmable dead time between the AUX and main driver allows for zero-voltage switching (ZVS). Under light-load conditions, device reduces switching frequency (frequency foldback) to reduce switching losses. It features unique circuitry to achieve output regulation without using an optocoupler. It is used in PoE IEEE 802.3af/at powered devices, high-power PD (beyond the 802.3af/at standard), active-clamped forward DC-DC converters, IP phones and wireless access nodes.
  • Supply voltage range is 17V to 20V
  • Operating temperature range from -40°C to 85°C, output short circuit protection with hiccup mode
  • Sample/hold feedback mode, UVLO threshold of 16V & internal 1% error amplifier
  • Peak current-mode control, active-clamped forward PWM controller, regulation without optocoupler
  • 100KHz to 600KHz programmable ±8% switching frequency, synchronization up to 1.2MHz
  • Programmable frequency dithering for low-EMI, spread-spectrum operation
  • Programmable dead time, PWM soft-start, current slope compensation
  • Programmable feed-forward maximum duty cycle clamp, 80% maximum limit
  • Frequency foldback for high efficiency light load operation, internal 18V zener clamp on supply i/p
  • Internal bootstrap UVLO with large hysteresis, 100µA (typ) start-up supply current

应用

消费电子产品, 便携式器材, 音频, 电源管理

警告

Market demand for this product has caused an extension in leadtimes. Delivery dates may fluctuate. Product exempt from discounts.

产品信息

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17V

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20V

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TQFN

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16引脚

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600kHz

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-40°C

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85°C

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MSL 1 -无限制
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技术文档 (1)

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CAD Models and drawings are provided to you on a revocable limited licence for your internal use only but remain the property of the manufacturer who retain all intellectual property rights and ownership. They are provided to assist you in decision making and as design guide but are not guaranteed to be error free, accurate or up to date and is not intended to be taken as advice.
Use of these CAD models and other options provided are downloaded and used entirely at your own risk and by continuing you confirm acceptance of the above.

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包装类型 切割卷带

535 有货 需要更多?

535 UK 有库存,可在 4-5 个工作日内交货

CNY12.41 ( CNY14.02  含增值税)

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包装规格:
单件(切割供应)
多件: 1 最低: 1
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