Patent ID: 11942866
Assignee: CYPRESS SEMICONDUCTOR CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 0:
1. An error amplifier comprising:
an output pin coupled to a pulse width modulation (PWM) comparator of a buck-boost converter;
a first transconductance amplifier to adjust an output current at the output pin, wherein the first transconductance amplifier operates in a constant voltage mode and comprises:
a first positive input to receive a first voltage reference; and
a first negative input coupled to a tap point of a voltage divider coupled between a voltage bus and a ground of the buck-boost converter;

a second transconductance amplifier to also adjust the output current at the output pin, wherein the second transconductance amplifier operates in a constant current mode and comprises:
a second positive input to receive a second voltage reference; and
a second negative input coupled to a current sense amplifier, the current sense amplifier being coupled to a sense resistor positioned inline along the voltage bus.