Digital controlled battery charging system
Granted: August 13, 2019
Patent Number:
10381854
A battery charging system has a switching circuit and a control circuit. The switching circuit has a first switch, and the control circuit has a plurality of analog control loops and a digital control unit. Each of the analog control loops provides a loop control signal based on a corresponding feedback signal, a corresponding reference signal and a slope compensation signal. The digital control unit provides a switching control signal to control the first switch based on the plurality…
Symmetrical power stages for high power integrated circuits
Granted: July 23, 2019
Patent Number:
10361631
A circuit assembly for a power converter includes power stage blocks. A power stage block includes a power stage IC die, an output inductor that is connected to a switch node of the power stage IC die, and capacitors that form an output capacitor of the power stage block. The output capacitors of the power stage blocks are symmetrically arranged. The output inductors can be placed on the same side of the substrate as the power stage IC dies, or on a side of the substrate that is opposite…
Oscillator with inherent comparator delay influence eliminated
Granted: July 9, 2019
Patent Number:
10348277
There is provided an oscillator which includes a current source, a capacitor coupled between the current source and a reference ground, a first switch coupled to the capacitor in parallel, an error amplifier, a comparator and a one-shot circuit. The error amplifier is coupled to the capacitor and configured to generate a regulation voltage based on a reference voltage and the voltage across the capacitor. The comparator is configured to compare the voltage across the capacitor with the…
Supply voltage generating circuit and associated integrated circuit
Granted: July 9, 2019
Patent Number:
10348215
A supply voltage generating circuit for generating a supply voltage signal to supply the active elements of an AC-DC voltage converter. The supply voltage generating circuit has a charging switch, a charging diode and a charging capacitor. When a main switch of the AC-DC voltage converter is turned on, the charging switch is turned on. Primary current flows through the charging switch and the main switch to the logic ground. When the main switch is turned off and the voltage across the…
DC-DC converter with transient control and the method thereof
Granted: July 9, 2019
Patent Number:
10348197
A DC-DC converter with transient control. The DC-DC converter includes a power switching circuit, a current to voltage converter, a PI circuit 403, a voltage to current converter 404 and a logic and control circuit 405. The DC-DC converter obtains the transient information of a current flowing through the power switching circuit, to slow down the variation of the output voltage, so as to eliminate the overshot issue.
Switching converter with quasi-resonant control and the method thereof
Granted: July 9, 2019
Patent Number:
10348182
A switching converter with quasi-resonant control having a switch and an energy storage component, comprising a peak current regulating circuit configured to provide a peak current regulating signal to regulate a peak current signal or a current sense signal, wherein the peak current regulating signal is adjusted when non-CCM (Current Continuous Mode) and non-valley-switching are detected.
Power supply circuit for computing platform
Granted: July 9, 2019
Patent Number:
10348115
A system has a processor, a battery charging circuit, a voltage regulating circuit and a control circuit. The control circuit provides digitalized feedback signals representative of circuit parameters of the battery charging circuit and circuit parameters of the voltage regulating circuit to the processor and receives a first information and a second information from the processor. The processor is able to adjust its operating states in response to the digitalized feedback signals. The…
Charging circuit and the method thereof
Granted: July 9, 2019
Patent Number:
10348111
A charging circuit adopts a plurality of feedback control circuits, a constant time signal generator and a logic circuit to control the operation of a power switch. The charge circuit needs no oscillator with high frequency, error amplifier with high speed and high accuracy, or compensation circuit with complicated structure, so the system portability is highly improved.
Current driving control for high brightness LED matrix
Granted: July 2, 2019
Patent Number:
10342083
A LED driving system for a LED matrix having a plurality of LEDs connected in parallel. The LED driving system includes a plurality of driving modules. Each one of the plurality of driving modules drives a corresponding one of the plurality of LEDs. Each one of the plurality of driving modules can include a local current driver receiving a reference current and providing a driving current to the corresponding one LED, and a local current tuning module receiving a U-bit current tuning…
Boost converter and the method thereof
Granted: May 7, 2019
Patent Number:
10284086
A boost converter having an inductor having a first terminal coupled to an input port to receive the input voltage; a high side switch coupled between the inductor and an output port; a low side switch coupled between the inductor and a ground reference; and a control circuit configured to receive a feedback signal indicative of the output voltage and a reference signal, and to provide a high side control signal and a low side control signal based on the feedback signal and the reference…
Multiphase power supply with constant on-time DC-DC converters
Granted: April 23, 2019
Patent Number:
10270343
A multiphase power supply includes several constant ON-time (COT) DC-DC converter integrated circuits (ICs), with each COT DC-DC converter IC providing an output voltage of a phase of the multiphase power supply. The COT DC-DC converter ICs are sequentially turned ON one after another in interleaved fashion. A COT DC-DC converter IC receives a control signal at a take pin and, in response, turns ON its output switch. The COT DC-DC converter IC generates another control signal at a pass…
Resonant converter with adaptive switching frequency and the method thereof
Granted: April 16, 2019
Patent Number:
10263528
A resonant converter with adaptive switching frequency operates continuously at best efficiency point. A power switch at primary side is turned off when a current flowing through a corresponding output power stage at secondary side falls to zero.
Bi-directional snapback ESD protection circuit
Granted: April 16, 2019
Patent Number:
10263420
An ESD protection circuit having a discharging transistor and a body snatching circuit. The discharging transistor is electrically coupled between a first node and a second node. The gate and the body of the discharging transistor are electrically coupled together. The body snatching circuit receives the voltages at the first and second nodes and outputs either the voltage at the first node or the voltage at the second node based on which of these two voltages have a lower value. The…
Power converter with average current detection and the detecting circuit and method thereof
Granted: April 16, 2019
Patent Number:
10261113
A power converter with average current detection and the corresponding detecting method and detecting circuit are disclosed. The average current detecting circuit has an average voltage detecting circuit and a voltage-current converting circuit. The average voltage detecting circuit generates a voltage across a detecting resistor by letting an inductor current flowing through an output inductor of the power converter flowing through the detecting resistor. Further, the average voltage…
Multi-phase power supply with DC-DC converter integrated circuits having current sharing function
Granted: April 9, 2019
Patent Number:
10256727
An interleaved multi-phase power supply with a plurality of DC-DC converter ICs. Each DC-DC converter IC has a current sharing pin, and the current sharing pins of the plurality of DC-DC converter ICs are connected together. Each DC-DC converter IC receives a feedback voltage signal to compare with a reference voltage signal to generate an error voltage signal as a reference of an output current of the corresponding DC-DC converter IC. And each DC-DC converter IC has a mismatch voltage…
Current sensing circuit and integrated circuit for four-switch buck-boost convertor
Granted: April 9, 2019
Patent Number:
10254314
A current sensing circuit used in a buck-boost converter having a pair of buck switches and a pair of boost switches, including: a first sensing circuit providing a detection current though a first normally-ON transistor and a second normally-ON transistor, and a second sensing circuit detecting an average of the detection current and providing a current sensing signal in accordance with the average. During a turn ON time of a first low side switch of the pair of buck switches, the…
AC-DC converting apparatus and method thereof
Granted: April 2, 2019
Patent Number:
10250143
An AC/DC converting apparatus having first and second input nodes for receiving an AC input voltage Vin, a first pair of switches for coupling a first terminal of a first inductor to the first input node and ground, a second pair of switches for coupling a second terminal of the first inductor to an output node for providing a DC output voltage Vout and ground, a third pair of switches for coupling a first terminal of a second inductor to the second input node and ground, and a fourth…
Control circuit for buck-boost power converter with seamless mode transition control
Granted: April 2, 2019
Patent Number:
10250141
A buck-boost power converter and a control circuit for the buck-boost converter. The control circuit includes a buck cycle pulse width modulation module and a boost cycle pulse width modulation module respectively having a first controllable hysteresis and a second controllable hysteresis. The buck cycle pulse width modulation module can regulate the first controllable hysteresis during the buck-boost power converter transits between a buck mode and a buck-boost mode so as to eliminate…
Integrated circuit for switching converter and method for providing power supply voltage to the same
Granted: March 5, 2019
Patent Number:
10224823
An integrated circuit used for a switching converter has a power supply circuit for providing a power supply voltage, and a control circuit. The switching converter has a switching circuit converting a DC input voltage into an output signal. The power supply circuit has a protection circuit, an UVLO unit and a current source coupled to a power supply capacitor. The protection circuit detects whether the DC input voltage is at a brown-in state. The UVLO unit generates a lock out signal by…
Resonant converter with adaptive on-time control and the method thereof
Granted: January 22, 2019
Patent Number:
10186975
A resonant converter adopts adaptive on-time control to provide better transient response. When the output voltage of the resonant converter varies, the on-time length of a power switch in power stages is adjusted, so that the switching frequency and the gain are regulated and optimized.
