Energy source backup charging power supply that adapts to a variable input voltage
AssigneeNorth American Manufacturing Enterprises, Inc.
InventorHamid Pishdadian, Jr.
Life of this patent
Estimating the term…
Abstract
A power supply that senses the variable voltage on LED devices and uses this voltage to force current into a storage device such as a battery to charge it. When power fails, a DC-DC boost converter supplies the necessary voltage taking current from the battery to maintain the LEDs at percentage nominal current level.
Claims13
An LED lighting system backup charger comprising:
- an input port constructed to be electrically connected to an LED driver, voltage from the input port being converted to a battery charging voltage by an electrically connected DC-DC down-converter;
- a battery charge controller accepting current from the DC-DC down-converter and supplying charging current to an energy storage system;
- a bidirectional current sensor sensing current flow to or from the energy storage system, wherein when power is present at the input port, the energy storage system charges;
- a first voltage sensor sensing voltage at the energy storage system;
- a second voltage sensor sensing voltage at the input port;
- a logic system attached to the first and second voltage sensor and the bidirectional current sensor, which upon loss of input power, activates a DC-DC boost converter that is electrically attached to the bidirectional current sensor attached to the energy storage system that produces a voltage sufficient to power LEDs from the input port at a reduced current.
An LED lighting system backup charger comprising a converter that converts a variable voltage from an LED driver to a voltage sufficient to charge a backup battery during a power up condition, and a boost converter that provides a voltage to the LED driver during a power down condition sufficient to drive LEDs at a reduced current less than current required for normal LED operation.
An LED lighting system backup charger comprising a converter that converts a variable voltage from an LED driver to a voltage sufficient to charge a backup battery during a power up condition, and a voltage boost circuit that provides a voltage to the LED driver during a power down condition sufficient to drive LEDs at a current less than or equal to current required for normal LED operation.
Dependencies are inferred from the claim text.