60 Watt Laptop Battery Charger

60 Watt Laptop Battery ChargerThe circuit is designed for laptop battery charger with 20V output voltage. This circuit uses TOP 246 Y made ​​by Power integrations. TOP 246 Y eliminates half the discrete components compared with the UC3842. As promised Power Integration, this IC is more reliable, has a smaller form, reducing the time in designing and saving costs.

Battery charger characteristic :
Input Voltage AC : 85 … 265V (universal input);
Overall efficiency at 85V AC power is not less than 79%;
Overall efficiency at 265V AC power is not less than 84%;
Output voltage DC : 20V;
Maximum load current : 3A.

Parts list :

Element

Nominal

Tolerance

Note

R1

2M

5%

Two series-connected resistors of 1M

R2

7,5 M +5,6 M

1%

Connected in series

R3

20,5 K

1%

R4

68K

5%

R5

4.7

5%

R6

6.8

5%

R7

68

5%

R8

330

5%

C1, C2, C3

0.47uFx400V

C4

150uF/400V

Possible, both in capacity and voltage.

C5

4700/1kV

Ceramics

C6

1uF/50V

C7

0.1uF/50V

C8

10uF/25V

C9, C10

1000uF/25V

Z1

300V 2A

TR1

10 Ohm 2A

U1

PC817

D1

1N4937

Can be replaced with UF4005

D2

1N4148

D3

MBR760

Or other 5A 60V Schottky

DA1

TOP246Y

F1

1A 250V

L1

47mkGn 1A

L2

3.3 uH 3A

ZD1

1N5249

BR1

RS207

Building guide : radiokot.ru

Power supply is an electronic device that supplies electric energy to an electrical load. The primary function of a power supply is to convert one form of electrical energy to another and, as a result, power supplies are sometimes referred to as electric power converters. Some power supplies are discrete, stand-alone devices, whereas others are built into larger devices along with their loads. Examples of the latter include power supplies found in desktop computers and consumer electronics devices.


Tags: laptop battery charger Power Integrations switching power supply circuit switching psu TOP246Y

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