Friday, August 23, 2013

IC LA 4440

6W 2-Channel, Bridge 19W typ Power Amplifier
 
Features

• Built-in 2 channels (dual) enabling use in stereo and bridge
amplifier applications.
Dual : 6W´2 (typ.)
Bridge : 19W (typ.)
• Minimun number of external parts required.
• Small pop noise at the time of power supply ON/OFF and
good starting balance.
• Good ripple rejection : 46dB (typ.)
• Good channel separation.
• Small residual noise (Rg=0).
• Low distortion over a wide range from low frequencies to
high frequencies.
• Easy to design radiator fin.
• Built-in audio muting function.
• Built-in protectors.
a. Thermal protector
b. Overvoltage, surge voltage protector
c. Pin-to-pin short protector



Sample aplication circuit


Monday, July 29, 2013

TV POLYTRON SERI LSIDI MATI

TV POLITRON LSIDI, type PS 52UN70SB / SN AA 02618/F9.



Perangkat TV ini menggunakan TR hor MD2009DFX, VERT LA78141, IC HBT 01-05G, Gejala kerusakan awal tv keluar asap alias ngebul dan bau gosong, setelah di telusuri di temukan Tr horisontal mati, T801/ d313 juga mati, pengamatan kasat mata juga ditemukan c802 /2,2 mf 160v kembung. kemudian penelusuran di lanjutkan, ditemukan juga c801 ukuran 300 nf 400v dalam keadaan mati.



selanjutnya penggantian komponen dilakukan dan hasilnya TV bisa nyala, akan tetapi setelah diamati gambarnya terlihat sedikit cacat, ada seperti garis tegak lurus berjalan dari layar sebelah kiri ke kanan, kemudian kita coba pasang antena dan hasilnya cukup memuaskan, gambar bening, garis/raster yang berjalan dari kiri kekanan tersebut hilang.

Perangkat tv ini juga menggunakan tombol sentuh untuk pengoperasianya.
semoga bermanfaat.



Friday, July 12, 2013

TRANSISTOR BD135/137/139

 NPN Epitaxial Silicon Transistor

Medium Power Linear and Switching
Applications
• Complement to BD136, BD138 and BD140 respectively




Collector-Base Voltage :
 BD135      45 volt
 BD137      60 volt
 BD139      80 volt

Collector-Emitter Voltage :
 BD135      45 volt
 BD137      60 volt
 BD139      80 volt

Emitter-Base Voltage 5 V

Collector Current (DC) 1.5 A
Collector Current (Pulse) 3.0 A
Base Current 0.5 A
Collector Dissipation (TC=25°C) 12.5 W
Collector Dissipation (Ta=25°C) 1.25 W
Junction Temperature 150 °C
Storage Temperature - 55 ~ 150 °C

Tuesday, July 2, 2013

Transistor TIP 41, TIP41A, TIP41B, TIP41C

 DISCRIPTION

Designed for Complementary Use with the
TIP42 Series
- 65 W at 25°C Case Temperature-
- 6 A Continuous Collector Current-
- 10 A Peak Collector Current-
- Customer-Specified Selections Available





DATASHEET

Collector-base voltage (IE = 0)
TIP41      80 VOLT
TIP41A    100 VOLT
TIP41B     120 VOLT
TIP41C    140 VOLT

Collector-emitter voltage (IB = 0)
TIP41      40 VOLT
TIP41A    60 VOLT
TIP41B    80 VOLT
TIP41C   100 VOLT

Emiter-base voltage  5 volt
Continuous collector current   6 Ampere
Peak collector current           10 A
Continuous base current         3 A
Continuous device dissipation  65 W
Operating junction temperature range  -65 to 150 derajat celcius

Demikian sedikit data mengenai transistor TIP41, smoga bermanfaat