# US 10,320,188 B2 · Power adapter, power device and output device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,320,188 B2 - Document ID: US10320188B2 - Status: Granted - Kind: B2 - Application number: 15/007,170 - Filed: 2016-01-26 - Published: 2017-03-02 - Granted: 2019-06-11 - Earliest claimed: 2015-08-27 - Assignees: Delta Electronics (Shanghai) Co., Ltd. - Applicants: Delta Electronics (Shanghai) Co., Ltd. - Inventors: Dao-Fei Xu - Web page: https://patentgrep.com/patent/US10320188B2 ## CPC - H02M 3/158: including plural semiconductor devices as final control devices for a single load - H02M 1/007: {Plural converter units in cascade (push-pull DC/DC converters with pre-regulator H02M3/3374; DC-AC converters following a DC-DC stage including a high frequency transformer H02M7/4807; DC-AC converters following a DC-DC conversion stage generating periodically varying voltages H02M7/4826)} - H02M 7/04: by static converters - H02M: APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF (transformers H01F; dynamo-electric converters H02K47/00; controlling transformers, reactors or choke coils, control or regulation of electric motors, generators or dynamo-electric converters H02P) ## Abstract A power adapter is disclosed herein. The power adapter includes an AC-DC converter, at least one output port, at least one DC transmission cable and at least one connector. The AC-DC converter is configured to convert an input AC voltage to an intermediate DC voltage. The output port is configured to output the intermediate DC voltage. A second terminal of the DC transmission cable is connected to the output port and configured to receive and transmit the intermediate DC voltage. The connector is connected to a first terminal of the DC transmission cable and configured to output an output voltage. The connector includes a first housing, a DC-DC converter and an output terminal. The DC-DC converter is enclosed in the first housing and configured to convert the intermediate DC voltage to the output voltage. The output terminal is enclosed in the first housing and configured to transmit the output voltage. ## Claims ### Claim 1 A power adapter, comprising: an ac-dc converter configured to convert an input ac voltage to an intermediate dc voltage; at least two output ports configured to output the intermediate dc voltage respectively; at least two dc transmission cables, wherein a second terminals of the at least two dc transmission cables are detachably connected to the at least two output ports respectively and configured to receive and transmit the intermediate dc voltage respectively; and at least two connectors, connected to first terminals of the at least two dc transmission cables respectively, wherein each of the at least two connectors comprises: a first housing; a dc-dc converter enclosed in the first housing and configured to convert the intermediate dc voltage to an output voltage to an external device; and an output terminal is detachably connected to the external device to directly transmit the output voltage to the external device, wherein a node of the output terminal enclosed in the first housing is directly connected to the dc-dc converter to receive the output voltage and another node of the output terminal is plugged into the external device to directly transmit the output voltage to the external device, wherein the at least two connectors are detachably connected to the external devices and provide adjustable output voltages to the external devices respectively. ### Claim 2 (depends on 1) The power adapter of claim 1, wherein the dc transmission cable only comprises power transmission line configured to transmit the intermediate dc voltage. ### Claim 3 (depends on 1) The power adapter of claim 1, wherein the dc-dc converter comprises a non-isolated buck power converting circuit, configured to convert the intermediate dc voltage to the output voltage. ### Claim 4 (depends on 3) The power adapter of claim 3, wherein the non-isolated buck power converting circuit comprises a synchronous rectifier unit. ### Claim 5 (depends on 4) The power adapter of claim 4, wherein the synchronous rectifier unit comprises a GaN HEMT. ### Claim 6 (depends on 3) The power adapter of claim 3, wherein the non-isolated buck power converting circuit comprises at least one of a GaN HEMT and a Si-MOSFET. ### Claim 7 (depends on 1) The power adapter of claim 1, wherein the output terminal is further connected to the external device, and the output terminal is configured to transmit a communication signal between the DC-DC converter and the external device while transmitting the output voltage to the external device. ### Claim 8 (depends on 7) The power adapter of claim 7, wherein the dc-dc converter is configured to output the output voltage according to the communication signal from the external device. ### Claim 9 (depends on 1) The power adapter of claim 1, wherein further comprises a second housing, the second housing encloses the ac-dc converter and the at least one output port. ### Claim 10 (depends on 1) The power adapter of claim 1, wherein further comprises at least one connecting line, first terminal of the each connecting line is connected to the ac-dc converter, and second terminal of the each connecting line is connected to one of the output ports; and a second housing encloses the ac-dc converter and the first terminal of the each connecting line. ### Claim 11 (depends on 1) The power adapter of claim 1, wherein the intermediate dc voltage is between 5 volts to 60 volts. ### Claim 12 (depends on 11) The power adapter of claim 11, wherein the intermediate dc voltage is not tight regulated. ### Claim 13 A power device in a power adapter, comprising: an input terminal configured to receive an input ac voltage; an ac-dc converter configured to convert the input ac voltage to an intermediate dc voltage, wherein the intermediate dc voltage is not tight regulated; at least two output ports configured to output the intermediate dc voltage respectively, wherein the intermediate dc voltage is not less than 5volts; and at least two output devices accompanied with the at least two output ports, wherein one of the at least two output devices comprise: a dc transmission cable, wherein a second termail of the dc transmission cable is detachably connected to one of the at least two output ports and configured to receive and transmit the intermediate dc voltage; and a connector connected to a first terminal of the dc transmission cable and configured to receive the intermediate dc voltage and output an output voltage to an external device, wherein the connector comprises: a first housing; a dc-dc converter enclosed in the first housing and configured to convert the intermediate dc voltage to the output voltage to the external device; and an output terminal is detachably connected to the external device to directly transmit the output voltage to the external device, wherein a node of the output terminal enclosed in the first housing is directly connected to the dc-dc converter to receive the output voltage and another node of the output terminal is plugged into the external device to directly transmit the output voltage to the external device, wherein the connector is detachably connected to the external devices and provide adjustable output voltage to the external devices. ### Claim 14 (depends on 13) The power device of claim 13, wherein the at least one output port is configured to output the intermediate dc voltage to at least one output device such that the output device convert the intermediate dc voltage to an output voltage to supply power to an external device connected to the output device. ### Claim 15 (depends on 13) The power device of claim 13, wherein the intermediate dc voltage is between 5 volts to 60 volts. ### Claim 16 (depends on 13) The power device of claim 13, further comprising a second housing, and the second housing encloses the ac-dc converter and the at least one output port. ### Claim 17 (depends on 13) The power device of claim 13, wherein further comprises at least one connecting line, first terminal of the each connecting line is connected to the ac-dc converter, and second terminal of the each connecting line is connected to one of the output ports; and a second housing encloses the ac-dc converter and the first terminal of the each connecting line. ### Claim 18 (depends on 13) The power device of claim 13, wherein the output terminal is further connected to the external device, and the output terminal is configured to transmit a communication signal between the DC-DC converter and the external device while transmitting the output voltage to the external device. ### Claim 19 (depends on 13) The power device of claim 13, wherein the dc transmission cable only comprises power transmission line configured to transmit the intermediate dc voltage. ### Claim 20 (depends on 13) The power device of claim 13, wherein the dc-dc converter comprises a non-isolated buck power converting circuit and the non-isolated buck power converting circuit comprises a synchronous rectifier unit.