CPC H02M 3/1582 (2013.01) [G06F 13/4282 (2013.01); H03F 1/0227 (2013.01); H03F 1/301 (2013.01); H03F 2200/351 (2013.01); H03F 2200/462 (2013.01)] | 20 Claims |
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.
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