Voltage boosting circuit with load current sensing

Details Voltage boosting circuit with load current sensing Voltage boosting circuit with load current sensing

1993-09-28

1996-04-16

Wong, Peter S.

Electricity: power supply or regulation systems

In shunt with source or load

Using choke and switch across source

323287, G05F 1625

Patent

active

055086020

ABSTRACT:
A power supply in which control of the switch-on instant of a power device of a boost-circuit (operating in a discontinuous mode) is implemented by monitoring the current which actually flows through the "fly-back" inductance. The current is monitored on a sensing resistance, and, by the use of a comparator, a signal is produced for enabling/disabling the transfer to an input of a PWM driving circuit of a switch-on signal produced by a null detector. This configuration provide good noise immunity, which is particularly useful in power-factor-correction applications, and reduced power dissipation.

REFERENCES:
patent: 4709322 (1987-11-01), Mirow
patent: 4825351 (1989-04-01), Uesugi
patent: 4942509 (1990-07-01), Shires et al.
Power Conversion, Oct. 1989 Proceedings, p. 110, "Control IC for Near Unity Power Factor in SMPS", by Herman Neufeld.

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