Load transient asynchronous boost for pulse width modulation modulator
US9490776B2 · kind B2 · utility
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8Claims
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Key dates
| Filing date | Nov 15, 2013 |
| Grant date | Nov 8, 2016 |
| Priority date | — |
| Expiry date | Nov 15, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/1566
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.