摘要:
A relay drive control device is configured to control drive of a relay for connecting a battery mounted on a vehicle and an external power supply. The relay drive control device includes a controller configured to, when driving the relay, supply an output voltage of the battery to the relay after increasing the output voltage to a voltage value at which the relay is drivable.
摘要:
An arrangement comprising at least one electrical voltage source (1) and one first voltage converter circuit (2) with an output (3) and an input (4). In this arrangement, the electrical voltage source (1) is connected to the input (4) of the first voltage converter circuit (2) and the output (3) of the first voltage converter circuit (2) can be connected to an electrical load (5). An input circuit (6) comprising an electromechanical switching element (7) and an inductance (8) is formed and the switching element (7) automatically opens and closes once or several times in dependence on a physical quantity, wherein an output circuit (10) comprising a capacitive element is formed.
摘要:
A Charge Pump Buck Converter (CPBC) includes a BC including an inductor and a CP coupled in parallel. Control logic is coupled to a switch driver coupled to a power switch(es). Control circuitry includes a voltage sensor sensing Vout and a voltage level generator for generating a first voltage level coupled to the CP stage and a second voltage level coupled to a duty cycle/rate generator block providing an input to an under voltage (UV) monitor coupled between OUT and the control logic. The control circuitry disables the CP when Vout>a first Vout level and controls the BC to regulate to a second Vout level>the first Vout level. During handoff between CP and BC during power up if Vout drops below a UV threshold, the UV monitor block modifies an input applied to the control logic for increasing charging supplied to the inductor.
摘要:
This disclosure provides an electrical switch based on tunneling electric contacts. Electrodes of the switch are formed to have reciprocal apparent contact surfaces, each smooth such that a compressed (in contact) composite mean asperity height between these surfaces is significantly smaller than an electron tunneling length of the switch. A movement mechanism is used to physically move one or both electrodes to vary the gap between electrodes to be greater than/less than the electron tunneling length. In select embodiments, the movement mechanism is electrically actuated and is amenable to relatively high frequency operation. The nano smooth surfaces provide for a tunneling switch where current flow is not primarily dependent on contact force between electrodes, and leads to a highly conductive ON state exceeding high performance, high-contact force mechanical switches, while also being amenable to high frequency operation.
摘要:
A mechanical self-reciprocating oscillator and mechanism and method for establishing and maintaining regular back and forth movement of a micromachined device without the aid of any electronic components are provided. The fully mechanical micromachined oscillator and mechanism are driven using only a DC power source on at least one substrate such as a semiconductor chip. The oscillator and mechanism preferably include an electrothermal actuator, that, when actuated, opens a switch to cut off supply current to the actuator. Two Versions of the oscillator and mechanism are provided using distinct hysteresis mechanisms, one structural and the other thermal.
摘要:
There is provided a power saving and highly reliable semiconductor device on which a switching power supply circuit and a driver circuit are mounted together, and which can perform appropriate control by the driver circuit even when a battery terminal is disconnected while reducing power loss in the entire semiconductor device. The semiconductor device includes: a first terminal which is connected to a battery power source; a switching power supply circuit which steps down a battery voltage input from the first terminal; a second terminal which is connected to a switching power source different from the battery power source; a regulator circuit which steps down a voltage input from the second terminal; and a predriver circuit which is connected to the regulator circuit.
摘要:
A control system for a DC-DC voltage converter includes a microcontroller having first and second applications. The first application commands the microcontroller to generate a first signal that is received at a first pin on a high side integrated circuit to transition a first plurality of FET switches to an open operational state, and that is received at a first pin on the low side integrated circuit to transition a second plurality of FET switches to the open operational state. The second application commands the microcontroller to generate a second signal that is received at a second pin on the high side integrated circuit to transition the first plurality of FET switches to the open operational state, and that is received at a second pin on the low side integrated circuit to transition the second plurality of FET switches to the open operational state.
摘要:
Provided herein are apparatus and methods for low voltage high power supply rejection ratio (PSRR) systems. A charge pump converts a supply voltage to a larger charge pump voltage and provides the charge pump voltage to a circuit subsystem. The charge pump voltage is regulated to a state dependent reference. In the steady state the charge pump voltage is regulated with respect to an output voltage of the circuit subsystem; in this way PSRR of the circuit subsystem is enhanced.
摘要:
Provided herein are apparatus and methods for low voltage high power supply rejection ratio (PSRR) systems. A charge pump converts a supply voltage to a larger charge pump voltage and provides the charge pump voltage to a circuit subsystem. The charge pump voltage is regulated to a state dependent reference. In the steady state the charge pump voltage is regulated with respect to an output voltage of the circuit subsystem; in this way PSRR of the circuit subsystem is enhanced.