Abstract:
An alternating current (AC) to direct current (DC) power converter may have a connector with a pair of power supply contacts and a pair of data contacts. An electronic device may be connected to the connector of the power converter. The power converter may supply DC power to the electronic device using the power supply contacts. The power converter may include control circuitry that has a resistor coupled across the data contacts. When the electronic device and the power converter are connected to each other, each may advertize to the other that capabilities are present that exceed industry standards. At the same time, standard-compliant discovery operations may be performed to probe the value of the resistance of the resistor that is coupled across the data contacts. When extended capabilities are discovered, extended functions may be performed including accelerated charging functions and data communications functions.
Abstract:
A power converter 24 comprises an alternating current AC to direct current DC converter supplying a DC voltage across two power lines, and control circuitry 24 including a resistor R across two data lines 30,32 and detector circuitry such as receiver 70 that detects modulated signals on one of the data lines. An electronic device 46 may be supplied by the converter and comprises a connector 36 having two power line contacts and two data line contacts and circuitry that measures how much resistance is across the data line contacts using a signal and a transmitter to transmit data by modulating the signal to create signal pulses (figs 4,5). The data and power lines can be those of a universal serial bus (USB) and the converter 24 can be used to charge a battery (fig 1, 52) of a portable device. The resistor can have a value of less than 200 ohms and be measured by holding a current source constant and monitoring the voltage. Switch 68 in series with the resistor and controllable current sources 62, 80 can be modulated to transmit data between a charger and a device to advertise to the other that capabilities including accelerated charging functions and data communications functions are present that exceed industry standards.
Abstract:
Un convertidor de alimentación de corriente alterna (AC) a corriente continua (DC) puede tener un conector con un par de contactos de fuente de alimentación y un par de contactos de datos. Un dispositivo electrónico puede conectarse al conector del convertidor de alimentación. El convertidor de alimentación puede suministrar energía de DC al dispositivo electrónico al utilizar los contactos de fuente de alimentación. El convertidor de alimentación puede incluir un conjunto de circuitos de control que tiene un resistor acoplado a través de los contactos de datos. Cuando el dispositivo electrónico y el convertidor de alimentación se conectan entre sí, cada uno puede anunciar al otro que se presentan capacidades que exceden los estándares industriales. Al mismo tiempo, pueden realizarse operaciones de descubrimiento en cumplimiento con los estándares para sondear el valor de la resistencia del resistor que se acopla a través de los contactos de datos. Cuando se descubren capacidades extendidas, pueden realizarse funciones extendidas incluyendo funciones de carga acelerada y funciones de comunicaciones de datos.
Abstract:
A POWER CONVERTER (12) IS PROVIDED THAT HAS AN ALTERNATING-CURRENT (AC) TO DIRECT-CURRENT (DC) SWITCHED-MODE POWER CONVERTER CIRCUIT (122) THAT CONVERTS ALTERNATING-CURRENT POWER INTO DIRECT-CURRENT POWER FOR POWERING AN ATTACHED ELECTRONIC DEVICE (10). POWER CAN BE CONSERVED BY AUTOMATICALLY PLACING THE POWER CONVERTER CIRCUIT (122) IN A LOW-POWER STANDBY MODE OF OPERATION WHENEVER THE ELECTRONIC DEVICE (10) IS DETACHED FROM THE POWER CONVERTER (12). A MONITORING CIRCUIT CAN BE POWERED BY A CAPACITOR OR OTHER ENERGY STORAGE ELEMENT (50) WHILE THE POWER CONVERTER (12) IS OPERATING IN THE STANDBY MODE. IF THE MONITORING CIRCUIT DETECTS AN OUTPUT VOLTAGE CHANGE THAT IS INDICATIVE OF ATTACHMENT OF THE ELECTRONIC DEVICE (10) OR IF THE STORAGE ELEMENT NEEDS TO BE REPLENISHED, THE MONITORING CIRCUIT CAN PLACE THE POWER CONVERTER CIRCUIT (122) IN AN ACTIVE MODE OF OPERATION. (FIG. 1)
Abstract:
A power converter is provided that has an alternating-current (AC) to direct-current (DC) switched- mode power converter circuit that converts alternating- current power into direct-current power for powering an attached electronic device. Power can be conserved by automatically placing the power converter circuit in a low-power standby mode of operation whenever the electronic device is detached from the power converter. A monitoring circuit can be powered by a capacitor or other energy storage element while the power converter is operating in the standby mode. If the monitoring circuit detects an output voltage change that is indicative of attachment of the electronic device or if the storage element needs to be replenished, the monitoring circuit can place the power converter circuit in an active mode of operation.
Abstract:
sistemas de carga com apoio de porta de carga direta e capacidades estendidas. um conversor de corrente alternada (ac) para corrente contínua (dc) pode ter um conector com um par de contatos se alimentação elétrica e um par de contatos de dados. um dispositivo eletrônico pode ser conectado ao conector do conversor de energia. o conversor de energia pode fornecer energia dc ao dispositivo eletrônico usando os contatos de alimentação. o conversor de energia pode incluir um circuito de controle que tem um resistor acoplado através dos contatos de dados. quando o dispositivo eletrônico e o conversor de energia são ligados um ao outro, cada um pode anunciar para o outro que as capacidades que estão presentes excedem os padrões da indústria. ao mesmo tempo, as operações de detecção conformes com os padrões podem ser realizadas para investigar o valor de resistência do resistor que está acoplado através dos contatos de dados. quando capacidades estendidas são descobertas, funções estendidas podem ser realizadas incluindo funções de carga acelerada e funções de comunicação de dados.
Abstract:
An alternating current (AC) to direct current (DC) power converter may have a connector with a pair of power supply contacts and a pair of data contacts. An electronic device may be connected to the connector of the power converter. The power converter may supply DC power to the electronic device using the power supply contacts. The power converter may include control circuitry that has a resistor coupled across the data contacts. When the electronic device and the power converter are connected to each other, each may advertize to the other that capabilities are present that exceed industry standards. At the same time, standard-compliant discovery operations may be performed to probe the value of the resistance of the resistor that is coupled across the data contacts. When extended capabilities are discovered, extended functions may be performed including accelerated charging functions and data communications functions.
Abstract:
An alternating current (AC) to direct current (DC) power converter may have a connector with a pair of power supply contacts and a pair of data contacts. An electronic device may be connected to the connector of the power converter. The power converter may supply DC power to the electronic device using the power supply contacts. The power converter may include control circuitry that has a resistor coupled across the data contacts. When the electronic device and the power converter are connected to each other, each may advertize to the other that capabilities are present that exceed industry standards. At the same time, standard-compliant discovery operations may be performed to probe the value of the resistance of the resistor that is coupled across the data contacts. When extended capabilities are discovered, extended functions may be performed including accelerated charging functions and data communications functions.
Abstract:
A power supply with reduced electromagnetic interference (EMI) is described. This power supply includes cascaded stages with switched-mode power-supply circuits that are switched synchronously during operation by switching signals that have a common fundamental frequency. EMI associated with the power supply is reduced by establishing a phase shift between the switching signals in at least two of the stages.
Abstract:
Electronic devices may have batteries that power internal circuitry. A power converter may connect to an input-output port in an electronic device to deliver power to the electronic device. Battery charging circuitry in the electronic device may be used to charge the battery in an electronic device while power is delivered from the power converter. The power converter may have load detection circuitry. When an output load is present, the power converter operates in an active mode and delivers power to the electronic device. When the output load is not present, the power converter enters a low-power standby mode. The electronic device has switching circuitry that periodically either electrically couples or electrically isolates the input-output port from internal circuitry. When the input-output port is isolated, the power converter senses that no output load is present and enters the standby state to conserve power.