A light-emitting diode (LED) luminaire, comprising:
- one or more LED arrays;
- a power supply unit configured to generate a main direct-current (DC) voltage with a first LED driving current to power up the one or more LED arrays at a full power when a line voltage from alternate-current (AC) mains is available;
- and
- an emergency-operated portion, comprising:
- a rechargeable battery with a terminal voltage;
- at least one full-wave rectifier configured to convert the line voltage from the AC mains into a first DC voltage;
- a charging circuit comprising a charging control device and a first transformer, the charging circuit coupled to the at least one full-wave rectifier and configured to convert the first DC voltage into a second DC voltage that charges the rechargeable battery to cause the terminal voltage to reach a nominal third DC voltage;
- an LED driving circuit comprising an input inductor, an electronic switch, at least one diode rectifier, and an output capacitor coupled to the at least one diode rectifier, the LED driving circuit configured to convert the terminal voltage into a fourth DC voltage with a second LED driving current to sustain lighting up the one or more LED arrays at a fraction of the full power when the line voltage from the AC mains is unavailable;
- a control and test circuit comprising a self-diagnostic circuit and a charging detection and control circuit, the control and test circuit configured to enable or disable the LED driving circuit and the power supply unit according to availability of the AC mains and whether a rechargeable battery test is initiated, the self-diagnostic circuit comprising a test and control unit comprising a data memory portion, a test portion, and a control portion;
- and
- a node radio-frequency (RF) transceiver circuit comprising a node modulator-demodulator (MODEM), a first digital interface, and a node controller coupled to the node MODEM via the first digital interface with transmitted data and received data both buffered in a first-in and first-out format, wherein the node MODEM comprises a first set of a plurality of mixers, a first low-noise amplifier, and a first power amplifier, wherein the node MODEM is configured to either demodulate received phase-shift keying (PSK) band-pass signals or modulate attribute data into transmitted PSK band-pass signals, and wherein the node controller is configured to serially provide the received data and the transmitted data to and from the self-diagnostic circuit, respectively,
- wherein:
- the charging circuit, the LED driving circuit, the power supply unit, and the control and test circuit are configured to auto-select either the main DC voltage or the fourth DC voltage to operate the one or more LED arrays;
- the self-diagnostic circuit further comprises a real-time clock portion in communication with the test and control unit, wherein the self-diagnostic circuit is configured to initiate the rechargeable battery test according to a plurality of predetermined test schedules provided by the real-time clock portion, wherein each of the plurality of the predetermined test schedules comprises a test period immediately following an initiation of a test event, wherein, upon the initiation of the test event, the test period begins with an output of the self-diagnostic circuit activated to reach a logic-high level and remaining activated so as to enable both the LED driving circuit and the test and control unit, wherein, at an end of the test period, the output of the self-diagnostic circuit is inactivated to drop to a logic-low level, and wherein a duration of the test period is configured to allow the self-diagnostic circuit to control discharging of the rechargeable battery and to perform the rechargeable battery test with a pass/fail test result stored in the data memory portion at the end of the test period;
- the data memory portion is configured to integrate multiple attribute data of self-diagnostic test results in multiple pass/fail tests over the plurality of the predetermined test schedules with information of self-diagnostic test times;
- and
- the node RF transceiver circuit further comprises a node single-ended antenna and at least one balanced-to-unbalanced device configured to convert between a balanced signal from the node MODEM and an unbalanced signal from the node single-ended antenna.