Article
4 Amp Photovoltaic Charge Controller
The use of solar photovoltaic (PV) energy sources is increasing, and many engineers involved in power electronics find solar power tempting. The circuit discussed here handles up to 4 A of current from a solar panel, which equates to about 75 W of power. A charging algorithm called ‘pulse time modulation’ is introduced in this design.
Materials
Gerber file
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PCB
Component list
COMPONENT LIST
Resistors
R1 = 15kOhm
R2,R3 = 3.3kOhm 1%
R4 = 2.2MOhm
R5 = 1kOhm
P1 = 5kOhm preset
Capacitors
C1 = 22µF 25V, radial
Semiconductors
D1 = MBR1645G (ON Semiconductor)
D2 = LED, 5mm
IC1 = TL431ACLP (Texas instruments)
T1 = IRFZ144 IRFZ44NPBF (International Rectifier)
T2 = 2SC1815 (Toshiba) (device is marked: C1815)
T3 = BC547
Miscellaneous
K1,K2 = 2-way PCB terminal block, lead pitch 5mm
PCB # 110751-1
Resistors
R1 = 15kOhm
R2,R3 = 3.3kOhm 1%
R4 = 2.2MOhm
R5 = 1kOhm
P1 = 5kOhm preset
Capacitors
C1 = 22µF 25V, radial
Semiconductors
D1 = MBR1645G (ON Semiconductor)
D2 = LED, 5mm
IC1 = TL431ACLP (Texas instruments)
T1 = IRFZ144 IRFZ44NPBF (International Rectifier)
T2 = 2SC1815 (Toshiba) (device is marked: C1815)
T3 = BC547
Miscellaneous
K1,K2 = 2-way PCB terminal block, lead pitch 5mm
PCB # 110751-1
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