SLAAEG7 April   2024 TAC5111 , TAC5111-Q1 , TAC5112 , TAC5112-Q1 , TAC5211 , TAC5212 , TAC5212-Q1 , TAD5112 , TAD5112-Q1 , TAD5212 , TAD5212-Q1

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Headset Plugs and Connection Diagrams
    1. 1.1 Part I: Pseudo-Differential (Capacitor-less) Headset Output Configuration
      1. 1.1.1 Detection Block, Capacitor-less Interface
      2. 1.1.2 How to Determine the Comparator Threshold V1 and V2 (Capacitor-less Interface)
      3. 1.1.3 How Does the Bias Voltage Vary With Detection Mode?
      4. 1.1.4 Detection Sequence – Capacitor-less Interface
    2. 1.2 Part II: AC-Coupled Stereo Headset Output Configuration – Capacitor Interface
      1. 1.2.1 Detection Block – Capacitor Interface
      2. 1.2.2 How to Determine the Comparator Threshold V1 and V2 – Capacitor Interface
      3. 1.2.3 How Does the Bias Voltage Change With Detection Mode?
      4. 1.2.4 Detection Sequence – Capacitor Interface
  5. 2Example for a Pseudo-Differential (Capacitor-less) Output Configuration
  6. 3Example for an AC-Coupled (Capacitor) Output Configuration
  7. 4Flowchart for Pseudo-Differential (Capacitor-less) Output Configuration
  8. 5Flowchart for AC-Coupled (Capacitor) Output Configuration
  9. 6Summary
  10. 7References

4 Flowchart for Pseudo-Differential (Capacitor-less) Output Configuration

GUID-20231129-SS0I-ZW4K-45N2-9ZPD36FBLGSL-low.svgGUID-20231129-SS0I-W6VX-JVGD-WBXQSJRL7JQG-low.svgFigure 4-1 Flowchart for Insertion Detection and Headset-Type Detection

The insertion detection and the headset-type detection are evaluated in Figure 4-1

If Dvgnd (VGND driver) is on, Micbias is switched on in order to do the hook button press detection and plug removal detection. Power due to Micbias is insignificant as compared to speaker power. If both Dvgnd and Micbias are off, pulse scheme which takes less than 50 µA is used to complete the detection. Detection is done at the end of high period of pulse.

If Dvgnd (VGND driver) is on, Micbias is switched on to do the plug removal detection. Power due to Micbias is insignificant as compared to speaker power. If Dvgnd is off, pulse scheme which takes less than 50 µA is used to complete the detection. Detection is done at the end of the high period of the pulse.