SLVAFP4 October   2023 TLC59283

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction of Time-Multiplexing With TLC59283
  5. 2TLC59283 Ringing Simulation Assessment
    1. 2.1 Small Parasitic Inductance of Vin and GND On-Board Without C_sink
      1. 2.1.1 Only Add L_LED1
      2. 2.1.2 Only Add L_LED2
    2. 2.2 Parasitic Inductance of Vin and GND On-Board With 4.7nF C_sink
      1. 2.2.1 L_LED1 Reach 3uH
      2. 2.2.2 L_LED2 Reach 3uH
    3. 2.3 Parasitic Inductance of Vin and GND on Customer’s Board Without C_sink
      1. 2.3.1 Only Add L_LED1
      2. 2.3.2 Only Add L_LED2
      3. 2.3.3 Add L_LED1 and L_LED2
    4. 2.4 Parasitic Inductance of Vin and GND on Customer’s Board With 4.7nF C_sink
  6. 3TLC59283 Ringing Bench Assessment
    1. 3.1 Bench Test Without R_sink and C_sink
    2. 3.2 Bench Test With 1nF C_sink
    3. 3.3 Bench Test With 10nF C_sink
    4. 3.4 Bench Test With 150 Ω R_sink
      1. 3.4.1 Bench Test With 10nF C_sink and 150 Ω R_sink
  7. 4Calculation of Resistor Value in RC Circuit
  8. 5Summary
  9. 6References

2 TLC59283 Ringing Simulation Assessment

The recommendation is to add capacitor in parallel at the output to reduce the output ringing. If possible, for best practices, connect a resistor in a series. Figure 2-1 shows the key parasitic inductance.

GUID-20231023-SS0I-GLNB-KQRZ-R2K6X79KBBQF-low.svg Figure 2-1 Key Parasitic Inductance