4-Channel power amplifier ICs

Concept

We are committed to zero defects when it comes to our 4-channel power amplifier ICs. Toshiba exerts its unique high-reliability and high-voltage design technology to implement strict production control. Additionally, Toshiba has continually improved its 4-channel power amplifier ICs to reduce noise and tune high-frequency performance to enhance sound quality.The latest addition to our product portfolio is an eco-friendly class-KB amp with self-diagnostic capabilities. Toshiba also offers one-of-a-kind products featuring low ON-resistance made with a new BiCD process, new packages and etc.

This figure shows the concept of the 4-channel power ICs.

Roadmap

Toshiba is expanding its portfolio of 4-channel power amplifier ICs that combine a set of its state-of-the-art proprietary core technologies.

This figure shows the roadmap of 4-channel power ICs.

Power Dissipation Comparisons Between Class-AB and Class-KB Amps

Toshiba's proprietary high-efficiency class-KB amp helps reduce heat dissipation, compared to general class-AB amps. The class-KB amp also helps reduce power loss even in large-amplitude mode.

This figure lists Power Dissipation Comparisons Between Class-AB and Class-KB Amps.

Calculation conditions

Amp use: 4 hours per day; 365 days per year
Amp's audio output power: 2 W

Life cycle assessment (LCA) calculation conditions

Overall gasoline-to-amp energy conversion efficiency: 18.9 %
Gasoline-to-power conversion factor: 0.104 L/kWh

This figure lists Annual CO2 Emissions Comparisons Between Class-AB and Class-KB Amps.

Product Lineup

Part Number	Max Output	Max Output	Class	Voltage Gain	I²C Bus	Output DC Offset Det.	Clipping Det.	Short-Circuit Det.	High-Side Switch	Half-Short Detection	Speaker Burning Prevention	2-Ω Load	Remarks
Part Number	V_CC = 15.2V	V_CC = 14.4 V	Class	Voltage Gain	I²C Bus	Output DC Offset Det.	Clipping Det.	Short-Circuit Det.	High-Side Switch	Half-Short Detection	Speaker Burning Prevention	2-Ω Load	Remarks
TB2941HQ	49 W	44 W	AB	26 dB		Y			Y			Y	Under Development
TB2931HQ	49 W	44 W	AB	26 dB		Y		Y		Y		Y
TB2938HQ	49 W	44 W	AB	26 dB		Y		Y		Y	Y
TB2925HQ	49 W	44 W	KB	26 dB		Y		Y				Y	Under Development; cross incorrect wiring
TB2952HQ	49 W	44 W	AB	26 dB/12 dB	Y	Y (I²C)	Y (I²C)	Y (I²C)		Y (I²C)		Y	Under Development
TB2975HQ	49 W	44 W	KB	26 dB/16 dB	Y	Y (I²C)	Y (I²C)	Y (I²C)		Y (I²C)		Y	Under Development
TB2959HQ	47 W	42 W	AB	26 dB							Y		AUX-IN

Y: Available
Y (I²C): Supported via the I²C interface

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