Toshiba Launches Current-Feedback 4ch Power Amplifier IC for Car Audio with Built-In Full-Time Offset Detection

Toshiba TCB501HQ

Toshiba Corporation's announced the launch of "TCB501HQ," a 4-channel power amplifier IC that detects output offset voltage that is a factor in speaker burnout. Mass production is scheduled to start in June 2016.

Toshiba - TCB501HQ

The new IC integrates a newly developed, full-time offset detection circuit. Conventional offset detection during sound reproduction is difficult. Toshiba’s new IC detects output DC offset voltage caused by leakage from the input capacitor and other sources, even during sound reproduction, and prevents speaker burnout.

The new IC integrates a current-feedback system of the type adopted in high-end hi-fi audio. This prevents sound quality degradation at wide bandwidths and offers consistent sound quality.


  • Part Number: TCB501HQ
  • Maximum Output Power: 49 W × 4 ch (VCC = 15.2 V, RL = 4 Ω, MAXPOWER)
  • Operating Supply Voltage Range: 6 V-18 V (4 Ω), 6 V-16 V (2 Ω)
  • Output Offset Voltage: 90 mV
  • Output Noise Voltage: 33 µV (BW = A-weight)
  • Embedded Functions and Features:
    • High output power and low distortion
    • Built-in mute and standby functions, offset detection, short circuit detection, and High-side switch driver.
    • 6 V operation (engine idling reduction capability)
    • A range of protection circuits (thermal, overvoltage, output to VCC, output to GND, output to output protections)
  • Package: HZIP25-P-1.00F
  • Sample Price (with tax): 500 yen

1-4 Layer PCBs $2

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