The TAS6424-Q1 device is a Four-channel digital-input Class-D audio amplifier that implements a 2.1 MHz PWM switching frequency that enables a cost-optimized solution in a very small PCB size, full operation down to 4.5 V for start/stop events, and exceptional sound quality with up to 40 kHz audio bandwidth
The TAS6424-Q1 Class-D audio amplifier is designed for use in automotive head units and external amplifier modules. The device provides four channels at 27 W into 4 Ω at 10% THD+N and 45 W into 2 Ω at 10% THD+N from a 14.4-V supply and 75 W into 4 Ω at 10% THD+N from a 25-V supply. The Class-D topology dramatically improves efficiency over traditional linear amplifier solutions. The output switching frequency can be set either above the AM band, which eliminates the AM-band interference and reduces output filter size and cost, or below AM band to optimize efficiency.
For a pin compatible two-channel amplifier, see the TAS6422-Q1
The device is offered in a 56-pin HSSOP PowerPAD™ package with the exposed thermal pad up.
PART NUMBER | PACKAGE | BODY SIZE (NOM) |
---|---|---|
TAS6424-Q1 | HSSOP (56) | 18.41 mm × 7.49 mm |
PART NUMBER | INPUT TYPE | CHANNEL COUNT | POWER-SUPPLY VOLTAGE RANGE | OUTPUT CURRENT LIMIT | MAXIMUM PWM FREQUENCY |
---|---|---|---|---|---|
TAS6424-Q1 | Digital | 4 | 4.5 V to 26.4 V | 6.5 A | 2.1 MHz |
TAS5414C-Q1 | Analog, Single-Ended | 4 | 5.6 V to 24 V | 12.7 A | 500 kHz |
TAS5424C-Q1 | Analog, Differential | 4 | 5.6 v to 24 V | 12.7 A | 500 kHz |
PIN | TYPE(1) | DESCRIPTION | |
---|---|---|---|
NAME | NO. | ||
AREF | 4 | PWR | VREG and VCOM bypass capacitor return |
AVDD | 8 | PWR | Voltage regulator bypass |
AVSS | 7 | PWR | AVDD bypass capacitor return |
BST_1M | 31 | PWR | Bootstrap capacitor connection pins for high-side gate driver |
BST_1P | 35 | PWR | Bootstrap capacitor connection pins for high-side gate driver |
BST_2M | 37 | PWR | Bootstrap capacitor connection pins for high-side gate driver |
BST_2P | 41 | PWR | Bootstrap capacitor connection pins for high-side gate driver |
BST_3M | 44 | PWR | Bootstrap capacitor connection pins for high-side gate driver |
BST_3P | 48 | PWR | Bootstrap capacitor connection pins for high-side gate driver |
BST_4M | 50 | PWR | Bootstrap capacitor connection pins for high-side gate driver |
BST_4P | 54 | PWR | Bootstrap capacitor connection pins for high-side gate driver |
FAULT | 26 | DO | Reports a fault (active low, open drain), 100-kΩ internal pullup resistor |
FSYNC | 14 | DI | Audio frame clock input |
GND | 1 | GND | Ground |
11 | |||
17 | |||
18 | |||
28 | |||
33 | |||
36 | |||
39 | |||
46 | |||
49 | |||
52 | |||
GVDD | 9 | PWR | Gate drive voltage regulator for channel 3 and 4, derived from VBAT input pin. |
10 | Gate drive voltage regulator for channel 1 and 2, derived from VBAT input pin. | ||
I2C_ADDR0 | 22 | DI | I2C address pins |
I2C_ADDR1 | 23 | ||
MCLK | 12 | DI | Audio master clock input |
MUTE | 25 | DI | Mutes the device outputs (active low), 100-kΩ internal pulldown resistor |
OUT_1M | 32 | NO | Negative output for the channel |
OUT_1P | 34 | PO | Positive output for the channel |
OUT_2M | 38 | NO | Negative output for the channel |
OUT_2P | 40 | PO | Positive output for the channel |
OUT_3M | 45 | NO | Negative output for the channel |
OUT_3P | 47 | PO | Positive output for the channel |
OUT_4M | 51 | NO | Negative output for the channel |
OUT_4P | 53 | PO | Positive output for the channel |
PVDD | 2 | PWR | PVDD voltage input (can be connected to battery) |
29 | |||
30 | |||
42 | |||
43 | |||
55 | |||
56 | |||
SCL | 20 | DI | I2C clock input |
SCLK | 13 | DI | Audio bit and serial clock input |
SDA | 21 | DI/O | I2C data input and output |
SDIN1 | 15 | DI | TDM data input and audio I2S data input for channels 1 and 2 |
SDIN2 | 16 | DI | Audio I2S data input for channels 3 and 4 |
STANDBY | 24 | DI | Enables low power standby state (active Low), 100-kΩ internal pulldown resistor |
VBAT | 3 | PWR | Battery voltage input |
VCOM | 6 | PWR | Bias voltage |
VDD | 19 | PWR | 3.3-V external supply voltage |
VREG | 5 | PWR | Voltage regulator bypass |
WARN | 27 | DO | Clip and overtemperature warning (active low, open drain), 100-kΩ internal pullup resistor |
Thermal Pad | — | GND | Provides both electrical and thermal connection for the device. Heatsink must be connected to GND. |