Pin Function Grouping
Thought for 2 mins 18 sec
I've made a plan, and started work on it.
Fix any pin mismatches you find on INL-.
Worked for 1 min 8 sec
Fixed INL-: it remains Pin 1, and I updated it to Pin Type = Input, Pin Description = Left inverting audio input, Section = Analog, Pin Group = Analog, Pin Orientation = Left, and Sub-symbol = Analog.
Set Pin Type to "Input" on INL-, Set Pin Description to "Left inverting audio input" on INL-, and 4 more changes
Set INL-'s Pin Type to "Input"
Set INL-'s Pin Description to "Left inverting audio input"
Set INL-'s Section to "Audio Inputs"
Set INL-'s Pin Group to "Left Input"
Set INL-'s Pin Orientation to "Left"
Set INL-'s Sub-symbol Designator Suffix to "Audio Inputs"
Set Section to "Analog" on INL-, Set Pin Group to "Analog" on INL-, and 1 more change
Set INL-'s Section to "Analog"
Set INL-'s Pin Group to "Analog"
Set INL-'s Sub-symbol Designator Suffix to "Analog"
apply changes to the pins.
Thought for 1 min 33 sec
Refine this doc
Ask about this doc
TPA6132A2 Pin Functional Groups
Source: Texas Instruments TPA6132A2 datasheet pin configuration and functions table for the RTE 16-pin WQFN package.
Recommended general functional grouping
Each physical pin is assigned to exactly one group. The grouping is intentionally general and avoids duplicating pins across groups.
Table
| Functional group | Pins | Rationale |
|---|---|---|
| Audio Inputs | 1 INL-, 2 INL+, 3 INR+, 4 INR- | Left/right differential or single-ended audio input pins. |
| Audio Outputs | 5 OUTR, 16 OUTL | Headphone amplifier outputs to right/left headphone terminals. |
| Gain / Enable Control | 6 G0, 7 G1, 13 EN | Logic/control inputs: G0/G1 select gain; EN enables or shuts down the amplifier. |
| Charge Pump | 8 HPVSS, 9 CPN, 11 CPP, 12 HPVDD | Charge-pump/output-amplifier supply pins and flying-capacitor pins. HPVDD is the headphone amplifier positive supply pin and should stay in this group rather than being merged into the main VDD supply because the datasheet says not to connect HPVDD to VDD. |
| Main Supply | 14 VDD | Positive supply for the TPA6132A2 core. |
| Ground / Reference | 10 PGND, 15 SGND, Thermal Pad | PGND is ground; SGND is the amplifier reference/headphone jack ground reference; the exposed thermal pad may be connected to ground or left floating per datasheet. |
Pin-by-pin assignment
Table
| Pin no. | Pin name | Functional group | Suggested Flux pin type | Notes |
|---|---|---|---|---|
| 1 | INL- | Audio Inputs | Input | Inverting left input; left single-ended input. |
| 2 | INL+ | Audio Inputs | Input | Non-inverting left input; ground for single-ended input applications. |
| 3 | INR+ | Audio Inputs | Input | Non-inverting right input; ground for single-ended input applications. |
| 4 | INR- | Audio Inputs | Input | Inverting right input; right single-ended input. |
| 5 | OUTR | Audio Outputs | Output | Right headphone amplifier output. |
| 6 | G0 | Gain / Enable Control | Input | Gain-select input. |
| 7 | G1 | Gain / Enable Control | Input | Gain-select input. |
| 8 | HPVSS | Charge Pump | Power Out | Charge-pump output / negative power supply for output amplifiers; connect 1 uF capacitor to GND. |
| 9 | CPN | Charge Pump | Passive | Negative flying-capacitor terminal. |
| 10 | PGND | Ground / Reference | Ground | Power ground. |
| 11 | CPP | Charge Pump | Passive | Positive flying-capacitor terminal. |
| 12 | HPVDD | Charge Pump | Power In | Positive supply for headphone amplifiers; connect to 2.2 uF capacitor; do not connect to VDD. |
| 13 | EN | Gain / Enable Control | Input | Logic low shutdown, logic high active. |
| 14 | VDD | Main Supply | Power In | Positive power supply for the TPA6132A2. |
| 15 | SGND | Ground / Reference | Ground | Amplifier reference voltage; connect to ground terminal of headphone jack. |
| 16 | OUTL | Audio Outputs | Output | Left headphone amplifier output. |
| — | Thermal Pad | Ground / Reference | Ground or Unspecified | Solder to PCB landing pad; connect landing pad to ground or leave floating. |
Notes
- I did not create separate
3v3grouping because the datasheet names the actual supply pin VDD, not specifically 3.3 V. - I kept HPVDD out of the main supply group because the datasheet explicitly says do not connect HPVDD to VDD.
- I grouped PGND, SGND, and the thermal pad together under a broad Ground / Reference group, but SGND should still be understood as the headphone/audio reference connection rather than just a generic power ground.
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