TOKYO — (BUSINESS WIRE) — October 30, 2018 — Toshiba Electronic Devices & Storage Corporation (“Toshiba”) today announced the launch of "TCB702FNG," an addition to its 4-channel high-efficiency linear power amplifiers that meet current market requirements for high efficiency. Sample shipments start today with mass production scheduled to begin in the first quarter of 2019.
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Toshiba: A 4-channel high-efficiency linear power amplifier "TCB702FNG" with 45W output. (Photo: Business Wire)
With "TCB702FNG," 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 new IC’s maximum output is 45W, and the IC is pin-compatible with “TCB701FNG,” the company’s high efficiency linear power amplifier with maximum 50W output.
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.
|Maximum output||45W×4ch (Vcc=15.2V,RL=4Ω, MaxPower)|
|Supply voltage||6V to 18V|
|Output noise voltage||60μVrms (BW=DIN_AUDIO)|
Up to 80% lower than a typical class AB amplifier
(supply voltage=14.4V in case of 0.8W output)
･ 6V operations
･ Full-time error detection for output DC offset voltage
･ I 2 C 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)