LA4500 - Sanyo

LA4500 5.3W 2-Channel AF Power Amplifier

of External Parts C1 (C1) Feedback capacitors Related to low roll-off frequency fL for –3dB (100µF, fL=60Hz). A capacitance value of 47µF to 100µF is recommended. Increasing the capacitance value makes the starting time (ts) later. Decreasing the capacitance value makes the starting time (ts) earlier. C3 (C4) Bootstrap capacitors Decreasing the capacitance v.

Features

• Low idling current (20mA/2 channels) enabling prolonged battery life.
• Less dependence of idling current on VCC.
• High power (5.3W typ. ×2).
• High ripple rejection (60dB at steady state). Since filters are arranged in 3 stages (including 1 stage inside the IC) to attain satisfactory ripple rejection at transient state, ripple occuring at the time of motor start can be prevented from mixing in.
• Low pop noise at the time of power supply ON/OFF and good starting balance between both channels (0.6s.) due to built-in pop noise limiter.
• Pins provided for compensating high frequency responce.