TINA/Spice/UCC28700: UCC28700 simulation error in LTspice

HI Yan,

I had to delete the model that you posted since it was unencrypted and we can not release that publicly. As for your error, it is not an issue with the model as such since it works in PSpice and TINA-TI. It seems that your simulator is having an issue with understanding one of the standard spice syntax. The only place where t=100 is use is in the following lines

.subckt one_shot in out

+ params:  t=100

I would try to move everything to one line as follows and see if it works.

.subckt one_shot in out params:  t=100

Hi Yan,

I am surprised that this standard syntax is not supported. What is your error message?

The only other thing I can think of is to hard code the value of 't'. There are 2 instances of one_shot with different t values. In the actual UCC28700 model, you can call the first one one_shot_1 and the second one can be called one_shot_2.

U_TOP_N360021 one_shot

+  PARAMS:  T=300

X_U_TOP_U_MOD_UPCC_U62         U_TOP_U_MOD_UPCC_N16782718

+  U_TOP_U_MOD_UPCC_N16784328 one_shot PARAMS:  T=220

Change to following

U_TOP_N360021 one_shot_1

X_U_TOP_U_MOD_UPCC_U62         U_TOP_U_MOD_UPCC_N16782718

+  U_TOP_U_MOD_UPCC_N16784328 one_shot_2

Then define these 2 subcircuits (basically copy the one_shot subcircuit and replicate it, and rename it to include _1 in one of them and _2 in the second one).

Then make the following changes

.subckt one_shot in out * replicate and rename it to include _1 and _2

*+ params:  t=100  * comment or delete this line

s_s1         meas 0 reset2 0 s1

e_abm1         ch 0 value { if( v(in)>0.5 | v(out)>0.5,1,0)    }

r_r2         reset2 reset  0.1 

e_abm3         out 0 value { if( v(meas)<0.5 & v(ch)>0.5,1,0)    }

r_r1         meas ch  {t} * replaced {t} with the actual value 220 or 300 depending on whether this is _1 or _2.

c_c2         0 reset2  1.4427n 

c_c1         0 meas  1.4427n 

e_abm2         reset 0 value { if(v(ch)<0.5,1,0)    }

.model s1 vswitch

+ roff=1e+009

+ ron=1

+ voff=0.25

+ von=0.75

.ends one_shot

Hi Yan,

I will close this out and we will communicate through email.