: Many online downloads of the TL494 model contain a subtle but critical character corruption. A particular erroneous character § often appears in the netlist file. For example, you might see a line like V§DT N007 DTC 0.12 . This must be corrected to V1 N007 DTC 0.12 . Without this fix, the simulation will fail to run properly, as discussed in the following section.
This guide covers everything required to find, install, connect, and troubleshoot a TL494 macro-model in LTspice. 1. Acquiring the TL494 LTspice Model tl494 ltspice
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The is a versatile fixed-frequency pulse-width modulation (PWM) control circuit designed specifically for switching power supply control, including buck, boost, and push-pull configurations. It incorporates a 5V reference regulator, two error amplifiers, an adjustable oscillator, a dead-time control comparator, and pulse-steering flip-flops. : Many online downloads of the TL494 model
) is configured via the components attached to (Pin 6) and CT (Pin 5). Use the standard formula: This must be corrected to V1 N007 DTC 0
+-------------------+ REF | 14(VREF) (C1) 8 |--> Emitter/Collector Out 1 DTC | 4(DTC) (E1) 9 |--> Driver Gate 1 RT | 6(RT) (C2) 11 |--> Emitter/Collector Out 2 CT | 5(CT) (E2) 10 |--> Driver Gate 2 FEEDB | 3(FB) (OUTPUT) |--> Output Mode Control (Pin 13) +-------------------+ Setting the Switching Frequency The internal oscillator frequency ( foscf sub o s c end-sub ) is governed by Pin 5 ( CTcap C sub cap T ) and Pin 6 ( RTcap R sub cap T
For frequency‑domain loop design and compensator tuning, use an averaged model: