Maxim Integrated Products Inc. | Date: 2016-11-07
A method of regulating voltage includes closing first and second switching devices during first and second periods in response to first and second signals, respectively. The first and second switching devices open and close to connect and disconnect first ends of first and second inductors of first and second phases of a voltage regulator to and from an input voltage, respectively. The method includes selectively generating one of the first and second signals when a third signal is in a first state; selectively setting the third signal to the first state based on a ramp voltage; resetting the ramp voltage to a predetermined reset voltage when the third signal transitions from a second state to the first state; maintaining the ramp voltage at the predetermined reset voltage for a predetermined ramp reset period after the resetting; and increasing the ramp voltage after the predetermined ramp reset period.
Maxim Integrated Products Inc. | Date: 2016-10-03
The present disclosure eliminates the unwanted conduction of the body diode of the low side switch or the unwanted conduction of the low side switch in coupled phases of DC-DC converters operating in DCM to increase efficiency. Specifically, in one implementation, by detecting strong or weak coupling, the present disclosure eliminates body diode conduction in strong coupling by turning on the low side switch and eliminates negative body diode current in weak coupling by turning off the low side switch. Further, for multiphase switching DC-DC converters with coupled inductors operating at light load (i.e., in DCM), when a high side switch of a first phase is turned on, the body diode of a low side switch of a second phase is adaptively bypassed if needed, blocked by specific design, or prevented from conducting by reducing forward voltage across the body diode.
Maxim Integrated Products Inc. | Date: 2015-11-09
A system includes a first galvanic isolator, a second galvanic isolator, a sensor, and a monitoring module. The first galvanic isolator includes a first electrical insulator. The second galvanic isolator is connected in series with the first galvanic isolator and includes a second electrical insulator. The sensor generates a first output signal based on an electrical characteristic of one of the first and second electrical insulators. The monitoring module, based on the first output signal, selectively generates a signal indicative of a failure of at least one of the first and second electrical insulators.
Maxim Integrated Products Inc. | Date: 2016-11-28
Aspects of the disclosure pertain to a system and method for providing temperature limiting for a voice coil of a speaker. The system and method provide the aforementioned temperature limiting based upon monitoring (e.g., measurement) of an amplifier output signal provided to the speaker. Providing the aforementioned temperature limiting promotes improved protection for the speaker.
Maxim Integrated Products Inc. | Date: 2016-11-16
An adaptive dual mode card emulation system (in Card Emulation Mode or PICC design) within an NFC device is disclosed to solve the strong field power delivering issue and also achieve longer communication range. The NFC device may be a NFC tag or an electronic device (such as a smartphone) operated in a card emulation mode. The NFC device comprises an antenna used for wireless communication. The adaptive dual mode card emulation system comprises a passive load modulation (PLM) module, an active load modulation (ALM) module and an automatic power control (APC) module. The APC module couples to both the ALM and PLM modules and selectably enables the ALM or PLM module depending on the strength of received carrier signal sent from an NFC reader.
Maxim Integrated Products Inc. | Date: 2016-06-20
Various embodiments of a laser driver are described herein. In an embodiment, a laser driver system includes: an external set of inductors including a first external inductor and a second external inductor; an internal set of inductors including a first internal inductor and a second internal inductor; and a DC-to-DC convertor configured to bias a first output path defined by the first external inductor and the first internal inductor and a second output path defined by the second external inductor and the second internal inductor.
Maxim Integrated Products Inc. | Date: 2016-07-21
A mobile device with orientation aware audio mapping capability is disclosed. The mobile device has an aux speaker, a loud speaker, a sensor for device orientation detection, and a processor (or processors) coupled to the sensor and the speakers. Depending on the device orientation, the processor sends a mapped audio output to the speakers. The mapped audio output may be a mono audio signal or a stereo audio signal. The stereo audio output signal may be a stereo audio output signal with a balanced or biased audio power distribution between the aux speaker and the loud speaker.
Maxim Integrated Products Inc. | Date: 2016-06-30
A battery charging system includes a master charger that receives a supply voltage, outputs a master charging current based on the supply voltage, and selectively outputs a slave charger control signal. At least one slave charger receives the slave charger control signal from the master charger, receives the supply voltage, and selectively outputs a slave charging current based on the slave charger control signal and the supply voltage.
Maxim Integrated Products Inc. | Date: 2016-01-04
A system includes a clock interconnect network having an input node and a plurality of output nodes. The clock interconnect network receives a clock input at the input node and distributes, based on the clock input, a plurality of clock signals via respective ones of the plurality of output nodes. A propagation delay of each of the plurality of clock signals distributed by the clock interconnect network is approximately equal to respective propagation delays of others of the plurality of clock signals distributed by the clock interconnect network. A digital-to-analog converter includes a plurality of segments, each outputting a respective output, and a plurality of drivers. Each of the plurality of drivers receives a respective one of the plurality of clock signals and provides a driver signal to a respective one of the plurality of segments based on the respective one of the plurality of clock signals.
Maxim Integrated Products Inc. | Date: 2016-07-13
A method for controlling a switching circuit including an input port electrically coupled to a photovoltaic device and an output port electrically coupled to a load includes (1) entering a voltage limiting operating mode and (2) in the voltage limiting operating mode (i) causing a control switching device of the switching circuit to repeatedly switch between its conductive and non-conductive states in a manner which limits magnitude of an output voltage to a maximum voltage value, the output voltage being a voltage across the output port, and (ii) varying the maximum voltage value as a function of magnitude of an output current, the output current being a current flowing through the output port.