Abstract: A charge pump voltage regulating circuit which uses a constant current generator and a second current generator, controlled by the output voltage of the charge pump circuit. The current from the constant current generator is divided between the input to a current controlled oscillator and the second current generator. When the output voltage of the charge pump circuit increases the current in the second current generator increases, the current flowing into the current controlled oscillator decreases, the frequency of the clock signals supplied to the charge pump circuit decreases, and the output voltage of the charge pump circuit decreases. When the output voltage of the charge pump circuit decreases the current in the second current generator decreases, the current flowing into the current controlled oscillator increases, the frequency of the clock signals supplied to the charge pump circuit increases, and the output voltage of the charge pump circuit increases.

Abstract: A power supply apparatus is disclosed, that comprises a DC power supply, a plurality of switch means for converting the output voltage of the DC power supply into an AC voltage, a transformer tap-connected to the DC power supply, a capacitor for charging/discharging an output current of the DC power supply, and a choke coil for suppressing the fluctuation of the output current of the DC power supply or the fluctuation of the current value of a discharge current of the capacitor.

Abstract: An isolating DC—DC converter has a main switching element disposed on the primary side of a main transformer and a synchronous rectifier disposed on the secondary side thereof. The synchronous rectifier is turned off by synchronizing to the turn-on of the main switching element and is turned on by synchronizing to the turn-off the main switching element. The isolating DC—DC converter has a drive transformer connected to a charging circuit of the main switching element, the drive transformer outputting a pulse when an ON signal of a control pulse driving the main switching element is outputted, and an early-off drive circuit receiving the pulse of the drive transformer to turn off the synchronous rectifier before the main switching element is turned on.

Abstract: Military vehicles often provide power to operate chargers to charge portable rechargeable batteries in the field. The military uses a NATO standardized DC slave plug as a connection from the vehicle battery to external charger devices. The NATO standardized DC slave plug is directly connected to the vehicle battery and offers no electrical protection to the vehicle battery. This method employs a battery charger adapter providing controlled DC power from the vehicle battery to charger devices for recharging Army communication batteries. The battery charger adapter is connected between the NATO standardized DC slave plug and an external charger and includes an electromechanical relay acting as an automatic safety switch which cuts off the load on the vehicle battery when the battery voltage falls to a predetermined critical voltage level, to prevent over-discharge of the vehicle battery.

Abstract: A voltage regulator is presented for regulating at least one of voltage, current or power to an electrical load. The regulator includes a transformer series connected between a power source and electrical load, and a bypass switch connected in parallel with the series connected transformer. The bypass switch is a back-to-back pair of silicon controlled rectifiers (SCRs). A pulse width modulated (PWM) inverter is coupled to the series connected transformer for generating a voltage to be applied to the series connected transformer. A controller is provided for transitioning the regulator from a normal mode through a commutate mode to an active mode, wherein the bypass switch is active in the normal mode and inactive in the active mode. The inverter provides a voltage to the series connected transformer in the active mode, and the controller and the PWM inverter together are configured to actively force the SCR off when the device is in the commutate mode.

Abstract: A dual-input, automatic-switching power supply comprises a primary power input, a secondary power input, and a power output. Included are first and second DPST mechanical relays and a third DPDT mechanical relay. A first relay input is connected to the primary power input and a corresponding first relay output is connected to a third relay input. A second relay input is connected to the secondary power input and a corresponding second relay output is connected to a different third relay input. The third relay output is connected to the power output. The relays in combination provide a relay moving contact gap spacing, source to source, of at least three millimeters. A first under voltage control module maintains the first and third relays in states causing the primary power input to be connected to the power output as long as voltage from the primary power input remains above a preestablished primary voltage dropout level.

Abstract: An integrated circuit chip configuration, e.g., a microprocessor, includes feedback control circuitry defined thereon to control mid-frequency components of current demand of the integrated circuit chip and thereby regulate power supply voltage to within design tolerances of the integrated circuit chip. Such mid-frequency components can be generated by directed changes in operating frequency of the integrated circuit chip or by cyclic or episodic variations in circuit activity, e.g., instruction sequence dependent variations. When generated, such mid-frequency components can excite mid-frequency resonances in a power distribution system and generate power supply voltage disturbances. In some configurations, the integrated circuit chip includes current dump circuitry defining a controlled impedance path between first and second power supply voltage terminals of the integrated circuit chip.