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Toshiba Electronic Devices & Storage Corporation Launches 4-channel High-Efficiency Linear Power Amplifier for Car Audio

December 7, 2017
Toshiba Electronic Devices & Storage Corporation

Power consumption up to 80%*1 lower than general class AB amplifier


TOKYO - Toshiba Electronic Devices & Storage Corporation today announced a new 4-channel high-efficiency linear power amplifier "TCB701FNG," that meets current market requirement for high efficiency. Sample shipments will start in January, 2018.

With "TCB701FNG," the company has improved on its technology to realize efficiency comparable with a digital high efficiency, class D amplifier in actual operating range (0.5 to 4W). Power consumption is cut by up to 80%*1 of that for a typical class AB amplifier.

The new amplifier also includes 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 TCB701FNG
Maximum output 49W×4ch (Vcc=15.2V,RL=4Ω, MaxPower)
Supply voltage 6V to 18V
Total harmonic distortion 0.01% (Pout=0.4W)
Output noise voltage 60μVrms (BW=DIN_AUDIO)
Power consumption Up to 80%*1 lower than a typical class AB amplifier
(supply voltage=14.4V in case of 0.8W output*2)
Functions and features
  • 6V operations
  • Full-time error detection for output DC offset voltage
  • Anti-high frequency noise
  • I2C 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)
Package P-HSSOP36-1116-0.65-001

*1 The power consumption comparison with a typical class AB amplifier was corrected from 90% to 80% on June 7, 2018.
*2 The power consumption comparison condition was corrected from 1W output to 0.8W on June 7, 2018.

For more information about the line-up of Power Amplifier ICs for automotive applications, please visit:

Customer inquiries:

Mixed Signal IC Sales and Marketing Department
Sales and Marketing Group I
Tel: +81-44-548-2826

*Information in this document, including product prices and specifications, content of services and contact information, is current on the date of the announcement but is subject to change without prior notice.

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