The AD693 power consumption reducing circuit with a parallel external power tube

Published:2012/8/26 22:40:00 Author:Ecco | Keyword: power consumption reducing , parallel , external power tube | From:SeekIC

In the AD693, output transistor VT1 has the maximum power consumption, if necessary, it can use external power tubes connected in parallel to reduce their power consumption, the circuit is shown in the figure. VT2 can select 2N1711 or 2N2219A NPN power tube, its base connects to OUT-end, the collecting electrode connects to BOOST ends. It requires power tube's cutoff frequency fT=10~100MHz, AC current amplification coefficient β >10. 2N1711 and 2N2219A's main parameter: UCEO=75V, ICM=0.8A,PCM=0. 8W.



Reprinted Url Of This Article:
http://www.seekic.com/circuit_diagram/Basic_Circuit/The_AD693_power_consumption_reducing_circuit_with_a_parallel_external_power_tube.html

Print this Page | Comments | Reading(3)