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MAX8540 - High-Frequency Current- and Voltage-Mode PWM Controllers

Description

The MAX8540/MAX8541 pulse-width-modulated (PWM) controllers for forward/flyback isolated DC-to-DC converters provide maximum flexibility to power-supply designers and reduce external component count.

Features

  • useradjustable ramp magnitude for the PWM comparator. A cycle-by-cycle current-limit function controls the peak primary current during overload and short circuit. Both controllers can be set to latch off or to hiccup when a short circuit is detected. The number of current-limited cycles to initiate the hiccup mode and number of cycles skipped are user selectable to allow startup with high-capacitance loads and protect the converter against sustained short circuits. The MAX8540/MAX8541 feature 9Ω.

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Datasheet preview – MAX8540

Datasheet Details

Part number MAX8540
Manufacturer Maxim Integrated
File Size 328.69 KB
Description High-Frequency Current- and Voltage-Mode PWM Controllers
Datasheet download datasheet MAX8540 Datasheet
Additional preview pages of the MAX8540 datasheet.

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Full PDF Text Transcription

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19-2830; Rev 0; 4/03 KIT ATION EVALU LE B A IL A AV Synchronizable, High-Frequency Current- and Voltage-Mode PWM Controllers for Isolated Supplies General Description The MAX8540/MAX8541 pulse-width-modulated (PWM) controllers for forward/flyback isolated DC-to-DC converters provide maximum flexibility to power-supply designers and reduce external component count. These controllers allow common PC board layout for currentmode (MAX8540) and voltage-mode (MAX8541) designs. Both controllers feature adjustable switching frequency and external synchronization from 200kHz to 1MHz. Active-high and active-low enable, undervoltage protection (UVP), and overvoltage protection (OVP) reduce external component count.
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