Helix samples efficient converter
- 著者:Ella Cai
- 公開：:2017-03-30
Helix Semiconductors is sampling a two-chip set with a conversion efficiency of more than 95% when converting AC mains voltage to 5VDC — especially at light load, no load or standby operating conditions.
At full loads, the eMpower HS100 enables efficiency greater than 93%.
The industry has set a target for power consumed by electronic appliances when in an inactive, or standby, mode. Dubbed ‘Zero Power,’ the goal is specified as less than or equal to 5mW.
Helix claims that it’s eMpower HS100 device is the only one able to achieve Zero Power.
The chip-set converts North American (120VAC) or Japanese (90VAC) mains to 5VDC at 10W, and European (240VAC) mains to 5VDC at 5W.
The two chips within HS100 are ‘MuxCapacitor’ (in an 80pin QFN) and ‘Control’, and together they reduce rectified 90V – 240V AC line to 5.0Vdc, delivering 2A from 90-120Vac and 1A from 220-240VAac.
MuxCapacitor contains all of the high-voltage circuitry required for reducing the rectified mins voltage to a primary-side voltage for the forward converter isolation transformer.
Start-up and control of MuxCapacitor is provided by the companion Control chip.
Operation is novel, and described from page 20 of the data sheet.
Key features include:
85-264Vac Input Voltage
Soft-Start
5V, 2A Output Voltage at 120VAC
5V, 1A Output Voltage at 240VAC
±5% Output Voltage Regulation
93% Efficiency at 2A
95% Efficiency at 200mA
Applications include smartphone chargers, smart outlets, IoT gateways, remote sensors, smoke alarms, smart LED lighting and thermostats.
At full loads, the eMpower HS100 enables efficiency greater than 93%.
The industry has set a target for power consumed by electronic appliances when in an inactive, or standby, mode. Dubbed ‘Zero Power,’ the goal is specified as less than or equal to 5mW.
Helix claims that it’s eMpower HS100 device is the only one able to achieve Zero Power.
The chip-set converts North American (120VAC) or Japanese (90VAC) mains to 5VDC at 10W, and European (240VAC) mains to 5VDC at 5W.
The two chips within HS100 are ‘MuxCapacitor’ (in an 80pin QFN) and ‘Control’, and together they reduce rectified 90V – 240V AC line to 5.0Vdc, delivering 2A from 90-120Vac and 1A from 220-240VAac.
MuxCapacitor contains all of the high-voltage circuitry required for reducing the rectified mins voltage to a primary-side voltage for the forward converter isolation transformer.
Start-up and control of MuxCapacitor is provided by the companion Control chip.
Operation is novel, and described from page 20 of the data sheet.
Key features include:
85-264Vac Input Voltage
Soft-Start
5V, 2A Output Voltage at 120VAC
5V, 1A Output Voltage at 240VAC
±5% Output Voltage Regulation
93% Efficiency at 2A
95% Efficiency at 200mA
Applications include smartphone chargers, smart outlets, IoT gateways, remote sensors, smoke alarms, smart LED lighting and thermostats.
