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6960901 |
Bi-directional DC/DC power converter having a neutral terminal
A bi-directional dc/dc power converter having a neutral terminal includes a first dc voltage terminal set and a second dc voltage terminal set. When the direction of power flow is from the first dc...
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6958594 |
Switched noise filter circuit for a DC-DC converter
A switched noise filter circuit for DC-DC converters which use the instantaneous output voltage to establish the converter's duty ratio. The converter cycles the switching element on and off for...
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6958595 |
Step-up/step-down DC-DC converter and portable device employing it
In a step-up/step-down DC-DC converter, an error signal commensurate with a difference between a voltage commensurate with the output voltage and a predetermined reference voltage and a triangular...
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6956359 |
Synchronous rectification for low voltage motor drive
An inductive load driven by power MOSFETs, such as in a low voltage motor drive, using synchronous rectification to reduce the voltage drop across a body diode of a power MOSFET. A comparative feed...
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6957278 |
Reference -switch hysteresis for comparator applications
The present invention concerns an apparatus comprising a first circuit and a second circuit. The first circuit may be configured to generate a reference output voltage in response to a plurality of...
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6952093 |
Adaptive small-signal compensation for switching regulators
A system, method, and apparatus are arranged to provide small-signal compensation in a switching regulator that includes an inductor. A zero adjustment circuit is included in the system to...
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6946822 |
DC/DC converter with filter for limiting the oscillation of the input current and associated method
The DC/DC converter provides an output current which is periodically variable over time and includes a control network which generates a variable reference signal for the input current which is...
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6946823 |
Delta-sigma DC-to-DC converter and method thereof
A delta-sigma DC-to-DC converter comprises a pair of high-side and low-side switches switched to convert an input voltage to an output voltage, a sense circuit to sense the output voltage of the...
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6936997 |
Method of forming a high efficiency power controller
A power controller ( 10, 70 ) forms a pass-through zone of output voltages. When the output voltage is between an upper limit and lower limit of the pass-through zone, the power controller ( 10, 70...
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6933710 |
Soft start techniques for control loops that regulate DC/DC converters
Improved soft start techniques for control loops that regulate DC/DC converter circuits are provided. An improved soft start circuit provides a varying voltage at the output of an error amplifier...
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6933709 |
Digital control system and method for switched mode power supply
A power supply comprises at least one power switch adapted to convey power between input and output terminals of the power supply, and a digital controller adapted to control operation of the at...
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6933706 |
Method and circuit for optimizing power efficiency in a DC-DC converter
In one embodiment, a turn-on delay control structure ( 30 ) includes a sense FET device ( 31 ) that is coupled to a switch node ( 13 ) in a synchronous DC-DC converter ( 10 ). The DC-DC converter...
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6930473 |
Method and circuit for reducing losses in DC-DC converters
In accordance with the present invention, a switching converter includes two transistors Q 1 and Q 2 parallel-connected between two terminals. Transistor Q 1 is optimized to reduce the dynamic...
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6931222 |
Method of and apparatus for deriving information, electric appliance, image formation apparatus, and computer product
An AC power source supplies power to a switching power source and a fixing heater. A power source waveform detecting circuit obtains a voltage waveform of the AC power source at a predetermined...
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6924632 |
Frequency/signal converter and switching regulator having such a converter
A frequency/signal converter is provided that receives an input clock signal and generates an output signal. The converter includes a first circuit that receives the input clock signal and...
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6924630 |
Buck-boost power factory correction circuit
A buck-boost switching converter includes a soft-switching circuit coupled across the boost switch, controlled to establish a short-circuit across the boost switch prior to turn-on of the boost...
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6922044 |
Synchronization of multiphase synthetic ripple voltage regulator
A multiphase ripple voltage regulator generator employs a hysteretic comparator referenced to upper and lower voltage thresholds. The hysteretic comparator monitors a master ripple voltage waveform...
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6919704 |
Reverse battery protection for a trolling motor
A trolling motor having reverse battery protection such that an inadvertent reversal of the battery leads, as when connecting the trolling motor to a battery, will not cause unwanted operation of...
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6917188 |
Power converter circuitry and method
A switching power supply controller coupled to a first switching power supply circuit and a second switching power supply circuit, the controller sensing voltages provided to the first switching...
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6914420 |
Power converter and method for power conversion
A power converter for controlling power flow between first and second voltages has the following structure. A common connection links a first polarity of the first and second voltages, and a first...
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6914421 |
DC regulated power supply
A DC regulated power supply includes: a power transistor provided for each output of a plurality of systems; a control IC, which compares a feedback value of an output voltage and a reference...
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6909335 |
Oscillator for DC—DC converter
An oscillator for a DC-DC converter, which is able to obtain constant frequency by using trans-conductance value as a clock of the DC-DC converter to make an output insensitive for process changes,...
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6906536 |
Time division multiplexed, piloted current monitoring in a switched mode DC—DC voltage converter and phase current measurement calibration for a multiphase converter
An arrangement for measuring current through a phase section of a buck mode DC-DC converter includes an auxiliary integrated circuit containing an auxiliary power MOSFET and a pilot MOSFET coupled...
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6900623 |
Power supply having multi-vector error amplifier for power factor correction
A regulated power supply having power factor correction control includes a multi-vector error amplifier. The multi-vector error amplifier provides an error signal that is used to regulate a...
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6897640 |
Switched mode power supply device adapted for low current drains, and cellular phone equipped with such a device
A switched mode power supply device comprising a power transistor periodically set to conduction and supplying a regulated voltage that comprises a ramp generation circuit controlled by a clock...
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6897641 |
Buck (or boost) converter with very fast output current transitions and low ripple voltage
In a multiphase buck converter running at precise duty cycles which have an inverse integer relationship with the number of phases and a precise synchronized phase relationship, it is possible to...
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6894471 |
Method of regulating the supply voltage of a load and related voltage regulator
The method is for regulating the supply voltage of a load via a switching voltage regulator having an inductor driven by at least a power switch for delivering current to an output capacitor having...
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6894462 |
Ratio adaptive gated oscillator
The present invention can be employed with any power supply circuit where it is desirable to employ a ratio adaptive, gated oscillator based step up switching regulator with a selectable duty...
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6894468 |
Control of DC/DC converters having synchronous rectifiers
A DC to DC power converter includes synchronous rectifiers which respond to a control waveform. Negative current from a load into the power converter is prevented by increasing the converter output...
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6891355 |
Method for computing an amount of energy taken from a battery
A method to compute an amount of energy taken from a battery coupled to a switching power converter is disclosed. The switching power converter charges a capacitor to a voltage and by the...
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6888339 |
Bus voltage control using gated fixed energy pulses
Voltage on a DC power bus is controlled using gated fixed energy pulses. The power bus includes a bus capacitor for storing charge and can have a varying load. A battery is provided for providing...
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6885175 |
Fixed frequency hysteretic regulator
A control circuit for controlling a hysteretic regulator to operate at substantially fixed frequency has a voltage offset circuit which receives a first feedback signal and generates a pair of...
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6885172 |
Device for driving a power transistor of a voltage converter provided with a piezoelectric transformer and corresponding voltage converter
A driving device is provided for driving at least one power transistor of a voltage converter that includes a piezoelectric transformer. The power transistor has a first non-drivable terminal...
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6882131 |
Power supply apparatus
A power supply apparatus comprises a power generating device in which the output power supplied to a load varies depending on a power generating condition; a current detection part for detecting...
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6879137 |
Power-supply device
A step down type DC-DC power-supply device implements both the stabilization of the control loop and the responsibility at the same time. In the power-supply device, an output power signal is fed...
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6879136 |
Inductor current emulation circuit for switching power supply
An inductor current emulation circuit for a switched-mode power supply (SMPS) which is arranged such that its inductor current (I L ) goes to zero at least once per switching cycle. The emulation...
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6879062 |
Electrical substation
A substation is disclosed for use in a power transmission and distribution network. The substation comprises a single phase isolating high frequency transformer having at least one input winding...
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6873139 |
Off-line switching power supply for generating negative voltages
An off-line switching power supply for generating negative voltages without a transformer, comprising a line voltage connection for receiving a line voltage, an inductor having a first terminal and...
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6870354 |
Power source circuit
A power source circuit includes a CMOS inversion circuit including a P-channel transistor and an N-channel transistor connected in series between a power source voltage and a reference potential,...
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6870353 |
Power supply control circuit and LSI using the same
A power supply control circuit includes a comparator which compares the supply voltage (VDDV) with a predetermined reference voltage (VREF) and supplies a comparison signal (CMP) when the supply...
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6871289 |
Slew rate limited reference for a buck converter
A compensated reference voltage for the controller of a buck regulator corrects for offsets and controls the rate at which the output load current can change in response to a change in the...
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6864671 |
Direct current voltage converter with switching regulator
A direct current voltage converter comprises a unit (BGR) for preparing a reference voltage (Vref), a regulator (OP), a pulse width modulator (Comp, Vsw), a voltage-controlled pole-changing switch...
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6865682 |
Microprocessor module with integrated voltage regulators
In a microprocessor module assembly, voltage regulators are integrated into the module and adapted for use with a processor and support electronics likewise mounted on the module. The voltage...
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6861830 |
Method of improving transient noise of a switching DC-to-DC converter with multiple output voltages
A first oscillating signal presenting a peak, a valley, a rising portion gradually increasing from the valley to the peak, and a falling portion gradually decreasing from the peak to the valley is...
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6853170 |
DC-DC converter and DC-DC converter drive circuit
The objective of this invention is to provide a DC-DC converter characterized by the fact that by correcting the loop gain corresponding to the switching of the operating mode, the variation in the...
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6853172 |
Switching regulator
To provide a switching regulator with a small packaging area. A switching regulator according to the present invention includes: a first terminal for inputting an output voltage of the switching...
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6850046 |
Digital signal processor architecture optimized for controlling switched mode power supply
A switched mode power supply comprises at least one power switch adapted to convey power between input and output terminals of the power supply, and a digital controller adapted to control...
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6847195 |
Auxiliary circuit for power factor corrector having self-power supplying and zero current detection mechanisms
The invention is to provide an auxiliary circuit for power factor corrector (PFC) having self-power supplying and zero current detection (ZCD) mechanisms, which comprises a filter capacitor...
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6844709 |
Programmable voltage supervisory circuit and method with minimum programming pins and low quiescent current
A programmable voltage supervisory circuit and method with minimum programming pins and low quiescent current is provided to monitor a supply voltage, by which only one programming pin can...
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6841980 |
Apparatus for controlling voltage sequencing for a power supply having multiple switching regulators
An apparatus for controlling voltage sequencing for a power supply having multiple switching regulators includes a first switching regulator, a second switching regulator, a first and second...
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