4-channel High-Efficiency Linear Power Amplifier for Car Audios Featuring Maximum 45W Output


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4-channel High-Efficiency Linear Power Amplifier for Car Audios Featuring Maximum 45W Output

Toshiba announced the launch of TCB702FNG, an addition to its 4-channel high-efficiency linear power amplifiers that meet current market requirements for high efficiency. With the new power amplifier, Toshiba has improved on its technology to realize efficiency comparable with a digital high efficiency of class D amplifier in actual operating range (0.5 to 4W). Power consumption is cut by up to 80% of that for a typical class AB amplifier.


The maximum output for TCB702FNG is 45W, and is pin-compatible with TCB701FNG, the company’s high efficiency linear power amplifier with maximum 50W output. Moreover, it also incorporates a self-diagnosis function with I2C bus control that can diagnose errors and contribute to a suitable set design by changing the detection setting for gain or time constants. It also includes full-time error detection of output DC offset voltage, which can quickly detect abnormal output offset voltage and prevent speaker burnout, improving set reliability.


Main specifications

Part number


Maximum output

 45W×4ch (Vcc=15.2V,RL=4Ω, MaxPower)

Supply voltage

 6V to 18V

Total harmonic distortion

 0.02% (Pout=0.4W)

Output noise voltage

 60μVrms (BW=DIN_AUDIO)

Power consumption

 Up to 80% lower than a typical class AB amplifier

 (supply voltage=14.4V in case of 0.8W output)

Functions and features

  •   6V operations
  •   Full-time error detection for output DC offset voltage
  •  2C bus control allows diagnosis of errors such as cross output connection.
  •  Various detections are selectable from two or more settings, such as a gain, mute time constants and temperature
  •  Can be used as both a power amplifier and line output amplifier.
  •  Various built-in protection circuits (output cross connection, over voltage, and low voltage)




Sample shipments are ready with mass production scheduled to begin in the first quarter of 2019.

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