Load Transient Asynchronous Boost for Pulse Width Modulation Modulator

摘要

A pulse width modulation controller (PWM) is disclosed which has a MOSFET (15) responsive to the error voltage (Verror) signal from the PWM amplifier (17) to detect a transient condition without delay ΔTd. The MOSFET drain generates and applies a detection signal (S) to a delaying circuit (D). The delaying circuit (D) is responsive to the transient detection signal (S) to asynchronously output two latch signals (S1) and (S2) which on application to respective latch circuits (L1, L2) cause a change in conduction state of PMOS (8) and NMOS (9). This arrangement reduces voltage undershoot.

主权项

1. A pulse width modulation (PWM) controller having synchronized PWM voltage mode control architecture comprising:
wherein there is provided means for detecting a transient load and means for asynchronously changing the state of the state machine.