Max Power 43 W BTL × 4 ch High Efficiency Audio Power IC
The TA8270HQ is TOSHIBA original class KB (Keyed BTL)
high efficiency audio amplifier for car audio applications.
The Class KB solutions is no need an external LPF for EMI
rejection and then it is possible to design for limited small DIN
size chassis.
Conversely, the class D must need an external LPF.
Power dissipation of class KB is no more than a half of the
class AB solutions.
Therefore, it is possible to design a smaller heatsink and keep
lower internal temperature into the car audio set; internal
cassette part, CD/MD part etc.
This IC can generate more high power and high quality sounds
as it is included the pure complementary PNP and NPN transistor output stage.
Additionally, stand-by function, mute function, various kind of protector and diagnosis function included output
offset voltage detection for car audio use are built-in.
Features
• High power : POUTMAX (1) = 43 W (typ.)
(VCC = 14.4 V, f = 1 kHz, JEITA max, RL = 4 Ω)
: POUTMAX (2) = 40 W (typ.)
(VCC = 13.7 V, f = 1 kHz, JEITA max, RL = 4 Ω)
: POUT (1) = 28 W (typ.)
(VCC = 14.4 V, f = 1 kHz, THD = 10%, RL = 4 Ω)
: POUT (2) = 24 W (typ.)
(VCC = 13.2 V, f = 1 kHz, THD = 10%, RL = 4 Ω)
• Built-in diagnosis circuit (pin 25)
• Low distortion ratio: THD = 0.04% (typ.)
(VCC = 13.2 V, f = 1 kHz, POUT = 2 W, RL = 4 Ω)
• Low noise: VNO = 0.13 mVrms (typ.)
(VCC = 13.2 V, Rg = 0 Ω, GV = 26dB, BW = 20 Hz~20 kHz)
• Built-in stand-by switch (pin 4)
• Built-in muting function (pin 22)
• Built-in various protection circuit
: Thermal shut down, over voltage, out to GND, out to VCC, out to out short
• Operating supply voltage: VCC (opr) = 9~16 V