Thank you very much for responding quickly,
The power dissipated in the pass transistor is approximately P = Vce x I, 1.6A x 1.2V = 1.9V, approximately 2 Watt
I measured the base current demanded by the pass trasnsistor and does not exceed 25 mA,…
Other Parts Discussed in Thread: UC3906 , BQ24450 Hi!
I´m building a 3A 12V battery charger, using the UC3906.
If I understood the datasheets correctly, with Imax = 3 A, Ioct needs to be about 0.3 A in order for the circuit change from overcharge…
Other Parts Discussed in Thread: UC3906 Dear all
I am looking for advice on using the UC3906 battery charger IC. I have an application using this device to charge a pair of 12V batterries wired in series to give 24V DC. Power supply is from a SMPSU…
Other Parts Discussed in Thread: UC3906 , BQ24450 Hi,
I want learn about uc3906 dual charger, Re resistor value calculation or its value at Fig.4 in datasheet.
Thank you very much
Other Parts Discussed in Thread: UC3906 Dear all
Application: A 24V battery-powered controller that runs 1 or 2 6A-rated motors with PWM feedback. A mains charger is used to top-up the batteries, controlled by the UC3906 IC, which is mounted on a small…
Other Parts Discussed in Thread: BQ24450 , UC3906
Hello Sir,
For 12 V lead-acid battery charge.
What is the Value:Vt
Ra = (Rsum + Rx ) (1 -2.3V / Vt ) where: Rx = Rc*Rd / (Rc + Rd)
Thanks
James
Other Parts Discussed in Thread: UC3906 , BQ24105 Greetings,
I am using UC3906 to charging my SLA battery 6V 4.5Ah, the following are the specification:
Voc=7.45V V12=7.08V Vf=6.9V V31=6.21V Vin=12V Imax=500mA
R2=0.51 Ω R7=82K Ω R12=10K Ω R13…
Other Parts Discussed in Thread: UC3906 , BQ24450 Hi,
Could you please tell me exactly what the difference is between the UC3906 and the BQ24450.
If they are completely identical, then why does the same part have two part numbers?
Thanks and…
I have made charger with use 3906. one charger is ok ( power led and fload led active in start) but others leds fault (power and chargin led active in start). Both charger carts is twin (design and elements). what is problem?
