TPA3116D2 15-W, 30-W, 50-W Filter-Free Class-D Stereo Amplifier with AM Avoidance

The TPA3116D2 is a Class-D audio amplifier IC from Texas Instruments, designed for multi-function, high power, high fidelity, and compact audio systems. The new amplifier IC was designed with low residual noise, a low distortion ratio, a flat frequency response achieved through feedback technology, and low EMI levels.

 

The TPA series of ICs can drive up to 100W load with 2Ω impedance in mono configuration, and in order to get the stereo sound, you need to configure and design 2 IC’s. The most interesting feature about this IC is that it can drive 2X15Ω speakers without a heatsink on a dual-layer PCB. This IC features a multifunction PLL IC that can be employed to reduce AM interference. The TPA3116D2 devices are fully protected against faults with short-circuit protection and thermal protection as well as overvoltage, undervoltage, and DC protection. Faults are reported back to the processor to prevent devices from being damaged during overload conditions.

 

TPA3116D2 Pinout Configuration

Pin No.	Pin Name	Pin Description
1	MODSEL	Mode selection logic input (LOW = BD mode, HIGH = 1 SPW mode). TTL logic levels with compliance to AVCC.
2	SDZ	Shutdown logic input for audio amp (LOW = outputs Hi-Z, HIGH = outputs enabled). TTL logic levels with compliance to AVCC.
3	FAULTZ	General fault reporting including Over-temp, DC Detect. Open drain. FAULTZ = High, normal operation,  FAULTZ = Low, fault condition
4	RINP	Positive audio input for right channel. Biased at 3 V.
5	RINN	Negative audio input for right channel. Biased at 3 V.
6	PLIMIT	Power limit level adjust. Connect a resistor divider from GVDD to GND to set power limit. Connect directly to GVDD for no power limit
7	GVDD	Internally generated gate voltage supply. Not to be used as a supply or connected to any component other than a 1 µF X7R ceramic decoupling capacitor and the PLIMIT and GAIN/SLV resistor dividers
8	GAIN/SLV	Selects Gain and selects between Master and Slave mode depending on pin voltage divider.
9	GND	Ground
10	LINP	Positive audio input for left channel. Biased at 3 V. Connect to GND for PBTL mode
11	LINN	Negative audio input for left channel. Biased at 3 V. Connect to GND for PBTL mode
12	MUTE	Mute signal for fast disable/enable of outputs (HIGH = outputs Hi-Z, LOW = outputs enabled). TTL logic levels with compliance to AVCC.
13	AM2	AM Avoidance Frequency Selection
14	AM1	AM Avoidance Frequency Selection
15	AM0	AM Avoidance Frequency Selection
16	SYNC	Clock input/output for synchronizing multiple class-D devices. Direction determined by GAIN/SLV terminal.
17	AVCC	Analog Supply
18	PVCC	Power supply
19	PVCC	Power supply
20	BSNL	Boot strap for negative left channel output, connect to 220 nF X5R, or better ceramic cap to OUTNL
21	OUTNL	Negative left channel output
22	GND	Ground
23	OUTPL	Positive left channel output
24	BSPL	Boot strap for positive left channel output, connect to 220 nF X5R, or better ceramic cap to OUTPL
25	GND	Ground
26	BSNR	Boot strap for negative right channel output, connect to 220 nF X5R, or better ceramic cap to OUTNR
27	OUTNR	Negative right channel output
28	GND	Ground
29	OUTPR	Positive right channel output
30	BSPR	Boot strap for positive right channel output, connect to 220 nF X5R or better ceramic cap to OUTPR
31	PVCC	Power supply
32	PVCC	Power supply
33	PowerPAD	Connect to GND for best system performance. If not connected to GND, leave floating.

 

Features and Specifications

•  Supports Multiple Output Configurations
  •  2 × 50 W Into a 4-Ω BTL Load at 21 V (TPA3116D2)
  •  2 × 30 W Into a 8-Ω BTL Load at 24 V (TPA3118D2)
  •  2 × 15 W Into a 8-Ω BTL Load at 15 V (TPA3130D2)

 

• Wide Voltage Range: 4.5 V to 26 V
• Efficient Class-D Operation
  •  >90% Power Efficiency Combined with Low Idle Loss Greatly Reduces Heat Sink Size
  • Advanced Modulation Schemes

 

• Multiple Switching Frequencies
  • AM Avoidance
  • Master and Slave Synchronization
  • Up to 1.2-MHz Switching Frequency

 

• Feedback Power-Stage Architecture with High PSRR Reduces PSU Requirements
• Programmable Power Limit
• Differential and Single-Ended Inputs
• Stereo and Mono Mode with Single-Filter Mono Configuration
• Single Power Supply Reduces Component Count
• Integrated Self-Protection Circuits Including Overvoltage, Undervoltage, Overtemperature, DC Detect, and Short Circuit with Error Reporting
• Thermally Enhanced Packages
  • DAD (32-Pin HTSSOP Pad Up)
  • DAP (32-Pin HTSSOP Pad Down)
• 40°C to 85°C Ambient Temperature Range

 

Note: More technical information can be found in the TPA3116D2 Datasheet, linked at the bottom of this page.

 

TPA3116D2 CC Typical Application Schematic 

The typical application circuit for the TPA3116D2 IC is shown below. For more information please refer to the datasheet linked at the bottom of the webpage.

 

TPA3116D2 CC Typical PCB Layout 

The typical PCB layout/ guideline for the TPA3116D2 IC is shown below and for more information please refer to the datasheet linked at the bottom of the webpage.

 

Top Layer:

 

Bottom Layer:

 

Applications  

• Mini-Micro Component, Speaker Bar, Docks
• After-Market Automotive
• CRT TV
• Consumer Audio Applications

 

2D Model and Dimensions

If you are designing a PCB or Perf board with this component then the following picture from the Datasheet will be useful to know its package type and dimensions.