JAJSHC3A May 2019 – November 2019 TL431LI-Q1 , TL432LI-Q1
PRODUCTION DATA.
The dynamic impedance is defined as . When the device is operating with two external resistors (see Figure 15), the total dynamic impedance of the circuit is given by , which is approximately equal to .
The VKA of the TL431LI-Q1 can be affected by the dynamic impedance. The TL431LI-Q1 test current Itest for VKA is specified in the Electrical Characteristics. Any deviation from Itest can cause deviation on the output VKA. Figure 17 shows the effect of the dynamic impedance on the VKA.