CW117 CW217 CW317 charger has a current-limiting protection configuration

Posted on Mar 28, 2007

As shown in Figure is a limiting protection charger. VT transistors and resistors R3 form limiting network. Seen from the figure, the resistor R3 is the base of transistor VT e

CW117 CW217 CW317 charger has a current-limiting protection configuration
Click here to download the full size of the above Circuit.

mitter Q resistor connected in series with the battery being charged. Charging current flows through the resistor R3. When the charge current is too large, the voltage drop on R3 exceeds 0.6V, the transistor VT will be turned on. Because VT parallel with resistor R2, VT conduction, so that the equivalent parallel resistance decreases, the output voltage Uo decreases, the output current is reduced, so as to achieve the purpose of limiting the charging current. When taken R3 l ), the maximum charging current is Iom 0.6/1 0.6A, select a smaller R3 will be higher charging current, but can not exceed the maximum integrated voltage regulator output current value.

Leave Comment

characters left:

New Circuits



Popular Circuits

High Voltage Switching for Energy Recovery
Liquid level control
Arduino multi-mode lamp with soft touch switch
SM5021 Crystal Oscillator Module IC
Constant current LED driver using LM3410
Infra-Red Sensor/Monitor
GPS Jammer
Precision pure DC HIFI headphone amplifier production circuit
Electrical control circuit plow
Application circuit biaxial magnetic field sensor
Construction 25W single-ended Class A tube amp circuit diagram EL156
The beginning and end of a three-phase motor winding speed judgment circuit