CONNECTION FOR SYNCHRONIZATION AT LEAST OF TWO PULSE-REGULATED SOURCES

摘要

The solution concerns synchronisation of operation frequencies of impulse regulated power supplies, whose control part uses the TDA 4700 or MDA 4700 integrated circuit. The connection consists of at least two identical control circuits (1), in which the synchronisation output (107) of the integrated circuit (11) is connected to the synchronisation input (118) of the integrated circuit (11) and to the input (121) of the monostable multivibrator (12), whose output (122) is connected to the input (131) of the output buffer stage (13), whose output (132) is connected to the synchronisation terminal (101) of the control circuit (1) and with the input (141) of the input buffer stage (14), whose output (142) is connected with the first terminal of the timing condenser (15) and with the first timing terminal (111) of the integrated circuit (11), whose second timing terminal (109) is connected with the first terminal of the timing resistance (16), whose second terminal is connected to the electrical ground, to which also the second terminal of the timing condenser (15) is connected. The synchronisation terminals (101) of all identical control circuits (1) are interconnected. The connection arrangement can be applied in synchronisation of impulse regulated power supplies or converters operating in parallel under common load.<IMAGE>