The 22A DC3 rectifier/regulator is for use with 3 phase permanent magnet alternators. The design uses
a “Buck” switchmode architecture for excellent efficiency.
The output may be set, at the factory, to any voltage between 13V and 15V DC. Two outputs are
provided, one unswitched, intended for connection to a 12V lead-acid battery and one switchable under
the control of an external input. Internal sensors are provided to monitor main-board temperature and
net current from the regulator. The DC3 has a single integral, military standard connector.
Peak phase-phase input voltage not to exceed 200V
Input current not to exceed 25A rms per pha e
Alternator source impedance must exceed 50 mOhm
14.3V at 0A
13.7V at 22A on 14V_SW output
Voltage can be factory set between 13V and 15V
Output voltage thermal drift less than -3mV/°C
When the internally rectified alternator voltage falls below the nominal regulated output voltage, the output
voltage tracks the input voltag e down to about 5V output
Current output 22A max
Isensed = Vsens or * 6.666 – 3.333
Accuracy better than +/-0.5A
Tsensed = Vsens or * 114.0 - 183.9
Accuracy better than +/-1°C over 0 to 100 °C
15
Electrical
Regulator will operate with or without a battery connected to 14V_BAT. Quiescent current drain from battery when
alternator s topped is 6mA typical.
Power Dissipation 58W at 15V 22A output
