Title:
A soft start circuit and technique
Document Type and Number:
Japanese Patent JP6175147
Kind Code:
B2
Abstract:
A regulator control circuit includes a switch control signal generator to generate a switch control signal and a soft start circuit to generate a soft start signal for use by the switch control signal generator. The soft start circuit includes a soft start controller and a decreasing circuit to decrease the soft start signal in response to the soft start controller. The soft start controller may comprise a non-regulation detector to detect a non-regulation condition. Embodiments include decreasing the soft start signal in response to a non-regulation condition lasting a predetermined time, detecting the non-regulation condition in response to a maximum duty cycle of the regulator switch, generating a soft start level indicator to control decreasing the soft start signal, and maintaining the soft start signal at a predetermined relationship with respect to a feedback signal.
Inventors:
Wibban, Joshua
Robert Stoddard
Robert Stoddard
Application Number:
JP2015556036A
Publication Date:
August 02, 2017
Filing Date:
January 15, 2014
Export Citation:
Assignee:
Allegro Microsystems LRC
International Classes:
H02M3/155; G05F1/56; H02M1/36
Domestic Patent References:
| JP2007159316A | ||||
| JP11069793A | ||||
| JP2007336628A | ||||
| JP2011152023A | ||||
| JP2005045993A | ||||
| JP2012205360A |
Attorney, Agent or Firm:
Shinjiro Ono
Yasushi Kobayashi
Shigeo Takeuchi
Osamu Yamamoto
Kenichi Torii
Yasushi Kobayashi
Shigeo Takeuchi
Osamu Yamamoto
Kenichi Torii