20W LM1875 devre şeması

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LM1875.JPG

20 Watt LM1875.png

Devamı ve pcb ekte yer almaktadır.
 

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Specification Value​

  • Up to 30 watts/channel output power
  • Maximum Load Resistance: 4 to 8 Ohm
  • Maximum Input Bias Current: 2uA@±25V
  • Avo typically 90 dB.
  • Low harmonic Distortion Noise : 0.015% @ 1KHz @ 8 ohms @ 20 watts.
  • Maximum Input Offset Voltage: 15mV@±25V
  • Wide power bandwidth: 70KHz
  • High current capability: 4A.
  • Maximum Working Temp: 150°C
  • Maximum Supply Current: 100mA@±25V
  • Wide supply range: 16V-60V
The Power supply type are single and dual, there is detail as follow.

  • Minimum Single Supply Voltage: 16V
  • Typical Single Supply Voltage: 18V|24V|28V
  • Maximum Single Supply Voltage: 60V
  • Minimum Dual Supply Voltage: ±8V
  • Typical Dual Supply Voltage: ±9V|±12V|±15V|±18V|±24V|±28V
  • Maximum Dual Supply Voltage: ±30V
  • 94dB ripple rejection
  • Typical Gain Bandwidth Product 5.5MHz
  • Typical Supply Current: 70mA at ±25V
  • Protection for AC and DC short circuits to ground
  • Thermal protection with parole circuit.
  • Internal output protection diodes.
  • Plastic power package: TO-220
 
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IC: LM1875
R1: 22kΩ
R2: 1kΩ
R3: 1kΩ
R4: 1MΩ
R5: 22kΩ
R6: 1Ω, 1W
C1: 10uF electrolytic (or preferably, polyester/polypropylene film)
C2: 47uF electrolytic
C3: 220nF X7R / film
CIC1, CIC3: 220uF electrolytic
CIC2, CIC4: 100nF X7R / film
 
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İşte farklı güç aralıklarına sahip yaygın olarak kullanılan üç amplifikatör
SpecificationLM386LM1875LM3886
Supply voltage12V60V80V
Output power0.5W25W60W
THD0.2%<0.6%0.03%
Noise i/p VNot spec3uV2uV
Gain bandwidth prod300kHz5.5MHz8MHz
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