mic9131 Micrel Semiconductor, mic9131 Datasheet - Page 17

• Manufacturer Part Number: mic9131
• Description: Mic9131 High-voltage, High-speed Telecom Dc-to-dc Controller
• Manufacturer: Micrel Semiconductor

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
August 2006
MIC9131
17
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.
M9999-080206
Micrel, Inc.