MIC9131BM Просмотр технического описания (PDF) - Micrel

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MIC9131BM

High-Voltage, High-Speed Telecom DC-to-DC Controller

Micrel 

MIC9131

Error Amplifier

The error amplifier is part of the voltage control loop of the

power supply. The FB pin is the inverting input to the error

amplifier. The non-inverting input is internally connected to

a 2.5V reference. The output of the error amplifier, COMP,

is connected to the PWM comparator. The error amplifier

Micrel, Inc.

provides the reference to limit and control the peak current

of the power supply. There is a 1.2V level shift between the

output of the error amplifier and the PWM comparator. This

allows the output of the error amplifier to operate in a linear

region and prevents loading on the COMP pin from interfering

with proper control of the current signal.

August 2006

17

M9999-080206

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