RT3662EB
Soft-Start and Slew-Rate Control
This block controls the slew rate of the internal
reference voltage when output voltage changes.
Error Amplifier
Error amplifier generates COMP signal by the
difference between VSET and FB.
Offset Cancellation
This block cancels the output offset voltage from
voltage ripple and current ripple to achieve accurate
output voltage.
UVLO
Detect the VCC pin voltage for under voltage lockout
protection and power on reset operation.
Current Balance
Each phase current sense signal is sent to the current
balance circuit which adjusts the on-time of each phase
to optimize current sharing.
RAMP
The Ramp generator is designed to improve noise
immunity and reduce jitter.
OC/OV/UV
VSEN and output current are sensed for over current,
over voltage and under voltage protection.
PWM CMP
The PWM comparator compares COMP signal and
current feedback signal to generate a signal for
TONGEN.
TONGEN
This block generates an on-time pulse which high
interval is based on the on-time setting and current
balance.
Copyright © 2019 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
DS3662EB-04
August 2019
www.richtek.com
5
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