MAXIM MAX5974 MAX5974AETE Коммутационные контроллеры

MAXIM

MAX5974AETE

MAX5974AETE  Лист данных

Категория продукта

Коммутационные контроллеры

приложение

PoE IEEE® 802.3af/at Powered Devices

спецификация

Peak Current-Mode Control, Active-Clamped

Forward PWM Controller

Regulation Without Optocoupler (MAX5974A/

MAX5974B)

Internal 1% Error Amplifier

100kHz to 600kHz Programmable Q8% 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 DutyCycle

Clamp, 80% Maximum Limit

Frequency Foldback for High-Efficiency LightLoad

Operation

Internal Bootstrap UVLO with Large Hysteresis

100µA (typ) Startup Supply Current

Fast Cycle-by-Cycle Peak Current-Limit, 35ns

Typical Propagation Delay

115nCurrent-Sense Internal Leading-Edge

Blanking

Output Short-Circuit Protection with Hiccup Mode

Reverse Current Limit to Prevent Transformer

Saturation Due to Reverse Current

Internal 18V Zener Clamp on Supply Input

3mm x 3mm, Lead-Free, 16-Pin TQFN-EP

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