Audio Signal Processing
Audio Power Amplifiers
The following are the new power amplifiers specifically designed to meet the requirements of flat and rear-projection TVs for lower profile and higher output power.
- Class-D 20-W ×2-Channel (BTL) Low-Frequency Power Amplifier: TB2924AFG
-
- Pout = 7.5 W×2 ch (RL = 8 Ω), or 13 W×2 ch (RL = 4 Ω)@VCC = 12 V
- Pout = 10.5 W×2 ch (RL = 8 Ω), or 19.5 W×2 ch (RL = 4 Ω)@VCC = 15 V
- Efficiency: 88%, Thermal automatic gain control (AGC) prevents output clipping.
Multi-channel master/slave configuration - Characteristic supply voltage ranges: 11 to 18 V(Topr = 0 to 75゜C, RL = 4 Ω)
11 to 20 V(Topr = 0 to 75゜C, RL = 8 Ω) - data sheet: TB2924AFG
- Class-AB MOS-Output 20-W ×2-Channel (BTL) Low-Frequency Power Amplifier: TB2922HQ
-
- Pout = 20 W×2 ch(RL = 8 Ω), Pout = 35 W×2 ch(RL = 4 Ω)@VCC = 18 V
- Max Power = 72 W×2 ch(RL = 8 Ω)@VCC = 26 V
- THD = 0.02％(Typ.)
- Standby mode, audio muting, load shorting protection, short-to-supply protection, short-to-ground protection, overvoltage protection, thermal shutdown
- Operating supply voltage ranges: 9 to 26 V(RL = 8 Ω / 6 Ω)
9 to 18 V(RL = 4 Ω) - data sheet: TB2922HQ
| Part Number | Typ. output (f = 1 kHz, THD = 10％) |
Functions | Operating Power Supply | Package |
|---|---|---|---|---|
| TA8200AHQ | 13 W×2 ch(VCC = 28 V, RL = 8 Ω) | Audio muting, fixed gain (GV) of 34 dB (fine-tunable), thermal shutdown, interchangeable with TA8216HQ and TA8258HQ | 10 to 37 V | HZIP12-P-1.78B |
| TA8216HQ | 13 W×2 ch(VCC = 24 V, RL = 4 Ω) | Audio muting, fixed gain (GV) of 34 dB (fine-tunable), thermal shutdown, interchangeable with TA8200HQ and TA8258HQ | 10 to 24 V (RL = 4 Ω)10 to 37 V (RL = 8 Ω) | HZIP12-P-1.78B |
| TA8246AHQ | 6 W×2 ch(VCC = 20 V, RL = 8 Ω) | Audio muting, fixed gain (GV) of 34 dB, no NF terminal, thermal shutdown, overvoltage protection, interchanegable with TA8256BHQ | 10 to 30 V | HZIP12-P-1.78B |
| TA8256BHQ | 6 W×3 ch(VCC = 20 V, RL = 8 Ω) | Audio muting, fixed gain (GV) of 34 dB, no NF terminal, thermal shutdown, overvoltage protection, interchanegable with TA8246AHQ | ||
| TA8258HQ | 20 W×2 ch(VCC = 37 V, RL = 8 Ω) | Audio muting, fixed gain (GV) of 34 dB (fine-tunable), thermal shutdown, interchangeable with TA8200HQ and TA8216HQ | 15 to 42 V |
Sound Controller ICs
| Part Number | Functions | Operating Power Supply | Package |
|---|---|---|---|
| TA1304FG/NG | Sound control; I2C bus interface; 2-input, 2-output digital ports | 8.1 to 9.9 V | FG: SSOP24 NG: SDIP24 |
| TA1343NG | Sound control; I2C bus interface; phase rotation surround sound | 8.1 to 9.9 V | SDIP24 |
Surround Sound ICs
| Part Number | Functions | Operating Power Supply | Package |
|---|---|---|---|
| TA2136FG/NG | SRS, 3D sound, stereo, 3D mono, bypass mode | 4.5 to 12 V | SSOP24 SDIP24 |
- Note: SRS and the SRS symbol are registered trademarks of SRS Labs, Inc. in the USA and other foreign contries.
Bipolar Transistors for Audio Output
| Package Characteristics |
TO-92MOD | TO-126 |
|---|---|---|
| VCEO = 160 V, IC = 1 A | 2SC2383 | - |
| 2SA1013 | ||
| VCEO = 150 V, IC = 1.5 A | - | 2SC3621 |
| 2SA1408 | ||
| VCEO = 160 V, IC = 0.1 to 0.2 A | 2SC2230×2 | 2SC3963×2 |
| VCEO = 180 V, IC = 0.1 to 0.2 A | 2SC2230A×2 | - |
Digital Audio Optical Modules
TOTX147, TXTX177, TORX147 and TORX177 Audio TOSLINK Series
The TOTX147 and TOTX177 Series are designed for transmitting audio signals, and the TORX147 and TORX177 Series are designed for receiving audio signals. These TOSLINK optical modules are manufactured at Toshiba Semiconductor Thailand (TST). The TOTX147 and TORX147 Series have a supply voltage of 3.3 V, while the TOTX177 and TORX177 Series have a supply voltage of 5 V. All of them offer a data rate of up to 15 Mb/s. All these series are available in three package versions: standard panel-mount, standard panel-mount with shutter, and mini with shutter.