LumenRadio AirGlow, Руководство по интеграции

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AirGlow radio module integration guide
Version: 2 March 17, 2022
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VAT reg. no: SE556761749201
Reference
designator Item name Manufacturer Part number
D6 TVS DIODE 40V 64.5VC SMA Littelfuse Inc. SMAJ40CA
D7 DIODE ZENER 33V 5W SMB Comchip Technology CZRB5364B-HF
F2 PTC RESET FUSE 60V 100MA 1206 Bel Fuse Inc. 0ZCJ0010FF2E
6.2 DALI PSU reference design
This is a simplistic but adequate low power DALI PSU circuit design. The minimum supply current
for the DALI bus utilizing below circuit is 30mA with
a short circuit current of approx. 50mA. This circuit
is sufficient to power a driver and the suggested
DALI data interface as the current consumption in
idle state will be <2mA for the AirGlow interface and
<2mA for the LED driver. If higher supply current
capabilities are required for power of a sensor from
the DALI bus a more advanced DALI PSU design is
required.
In the circuit to the left the voltage drop of the base-
emitter is matched by the voltage drop of diode D4.
The voltage drop over D5 is therefore equal to the
voltage drop of R9 which resistance will dimension
the short circuit current.
When the short circuit current is reached the
voltage dop over R9 becomes larger than the
voltage drop over D5. When this happens the two
diodes will start to conduct and the current will
through the diodes and not to the base of Q4 which
then turns off.