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LA4725 Arkusz danych(PDF) 5 Page - Sanyo Semicon Device |
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LA4725 Arkusz danych(HTML) 5 Page - Sanyo Semicon Device |
5 / 8 page LA4725 No.6631-5/8 4. Protection circuits • Due to the system structure of the protection circuit for shorts to VCC or ground, if there is a DC resistance between the amplifier output pins and ground, the protection circuit may operate when power is first applied and the amplifier may fail to turn on. The basic design approach we recommend is not to adopt any designs in which there is a DC resistance between the amplifier outputs and ground. • The LA4725 includes a built-in thermal protection circuit to prevent the IC from being damaged or destroyed if abnormally high temperatures occur. This thermal protection circuit gradually reduces the output if the IC junction temperature (Tj) reaches the range 170 to 180 °C due to inadequate heat sinking or other problem. If the temperature falls, the amplifier will restart automatically. • The LA4725 also includes other protection circuits. Use of these circuits also requires care during end product design and testing. 5. Other notes • The LA4725 is a BTL power amplifier. When testing this device, the ground systems for the test equipment connected to IC inputs, and that for the test equipment connected to IC outputs, must be isolated. Do not use a common ground. Printed Circuit Pattern (copper foil side) + + GND GND GND C5 C1 + C2 + + + C4 C10 C3 STB IN1 IN2 14 1 LA4625/LA4725 R2 R1 C6 -OUT1 R3 C7 +OUT1 R4 C8 -OUT2 R5 C9 +OUT2 VCC |
Podobny numer części - LA4725 |
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Podobny opis - LA4725 |
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