Variable input voltage DC to DC converter with switching transis

Details Variable input voltage DC to DC converter with switching transis Variable input voltage DC to DC converter with switching transis

1987-04-24

1988-10-04

Boudreau, Leo H.

Electric lamp and discharge devices: systems

Periodic switch in the supply circuit

Periodic switch in the primary circuit of the supply...

315241S, 363 19, 363131, 331112, H05B 4129, H05B 4134

Patent

active

047758210

ABSTRACT:
The DC to DC converter includes a coupled inductor having a primary winding and a feedback winding. A drive current regulator circuit receives a variable input voltage from the feedback winding but transmits a constant base drive current to the base terminal of the converter switching transistor. The base drive regulator circuit thereby enables the DC to DC converter to operate at high levels of efficiency over wide ranges of DC input voltages such as twelve to forty-eight volts DC.

REFERENCES:
patent: 3331033 (1967-07-01), Johnston
patent: 3417306 (1968-12-01), Knak
patent: 3515974 (1970-06-01), Stich
patent: 3523235 (1970-08-01), Schaefer
patent: 4135233 (1979-01-01), Seiersen
patent: 4321507 (1982-03-01), Bosnak
patent: 4573112 (1986-02-01), Numata et al.
patent: 4595974 (1986-06-01), Lethellier
patent: 4613797 (1986-09-01), Eggers et al.
patent: 4682081 (1987-07-01), Sikora

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