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From: The Real Andy on 13 Jun 2006 04:03
I thought one of the big manufacturers would have one. It is a common
part... sigh..
From: Terry Given on 13 Jun 2006 05:07
The Real Andy wrote:
> I thought one of the big manufacturers would have one. It is a common
> part... sigh..

FWIW:




** From C:\Program Files\SIMetrix\models\psu.lb
..subckt UC3842 Vout Osc Vp Comp Sense Vfb Ref Gnd
A$U2 [U6_OUT U5_IN4] U2_OUT nand
A$U3 [U2_OUT U7_OUT] U5_IN4 nand
X$ARB1 R1_P Sense ARB1_OUT $$arbsourceARB1 pinnames: N1 N2 OUT
..subckt $$arbsourceARB1 N1 N2 OUT
B1 OUT 0 V=tanh(v(n1,n2)*1000)*2.5+2.5
..ends
A$U16 U12_OUT U16_OUT DA
X$U1 Vfb Ref Vp Comp Gnd R5_N $$error_amp_2 pinnames: VINN BIAS VP VOUT
VN VINP
A$U17 U9_OUT U17_OUT DA
A$U6 U12_OUT U6_OUT inv
V1 S2_P 0 5V
A$U7 U15_OUT U7_OUT delay1
A$U15 ARB1_OUT U15_OUT AD
A$U4 Vp U4_OUT schmitt
A$U5 [U10_OUT U12_OUT U8_QP U5_IN4] U11_IN1 or
A$U12 Osc U12_OUT schmitt_osc
I2 R1_N Comp 10u
A$U13 U11_OUT U13_OUT DA
A$U10 U4_OUT U10_OUT inv
A$U11 U11_IN1 U11_OUT inv_dead
I1 Gnd I1_N 40m
A$U18 U4_OUT U18_OUT DA
*A$VCC2 VCC2_P DIG_VCC
D1 Comp D1_N Diode
D2 D1_N R1_N Diode
D3 R1_P I1_N Diode
Q2 Vp S1_N Vout 0 N1 20
R4 S1_N Gnd 1K
R5 Ref R5_N 10k
X$S4 Osc 0 U16_OUT 0 gen_switch : RON=250 ROFF=100Meg VON=3 VOFF=2
pinnames: P N CP CN
*A$U8 VCC2_P U12_OUT U8_SET U8_SET U8_QP U8_QN Toggle
*A$GND2 U8_SET DIG_GND
R6 R5_N Gnd 10k
A$U9 U11_IN1 U9_OUT dead
Q1 Vout U17_OUT Gnd 0 N1 20
X$S2 S2_P Ref U18_OUT 0 gen_switch : RON=1 ROFF=100Meg VON=3 VOFF=2
pinnames: P N CP CN
R1 R1_P R1_N 20k
X$S3 Vp 0 U18_OUT 0 gen_switch : RON=1.36k ROFF=30k VON=3 VOFF=2
pinnames: P N CP CN
R2 Gnd R1_P 10k
..ic Osc 0
R3 I1_N Gnd 10
X$S1 Vp S1_N U13_OUT Gnd gen_switch : RON=1 ROFF=1Meg VON=3 VOFF=2
pinnames: P N CP CN
..model inv d_inverter
..model or d_or
..model DIG_GND d_pulldown strong=true out_family="FORCE5"
..model DIG_VCC d_pullup strong=true out_family="FORCE5"
..model toggle d_tff
..model delay1 d_buffer rise_delay=150n fall_delay=150n
..model dead d_buffer rise_delay=20n fall_delay=1n
..model inv_dead d_inverter rise_delay=20n fall_delay=1n
..model nand d_nand
..model and d_and
..model Diode D(IS=1.6f CJO=0.3p M=0.3 VJ=0.75 ISR=2.6n)
..model N1 NPN BF=300 TF=0.5n CJC=0.3p VAF=100
..model P1 PNP BF=150 TF=2n CJC=0.3p VAF=150
..model D1 D
..model schmitt_osc adc_schmitt in_low=1 in_high=3
* 842/4
..model schmitt adc_schmitt in_low=10 in_high=16
* 843/5
*.model schmitt adc_schmitt in_low=7.6 in_high=8.4
..subckt gen_switch 1 2 3 4
S1 1 2 3 4 SW
..model SW VSWITCH RON={ron} ROFF={roff} VON={von} VOFF={voff}
..ends
..model AD adc_bridge
+ in_low=2.1
+ in_high=2.2
+ rise_delay=1e-12
+ fall_delay=1e-12
+ out_family = "UNIV"
+ out_low = 0
+ out_high = 5
+ clamp_bias=0.5
+ clamp_res=10
..model DA dac_bridge
+ out_high=5
+ input_load=-31p
+ t_rise=2n
+ t_fall=2n
+ g_pullup=0.024
+ g_pulldown=0.034
+ g_hiz=1e-9
+ knee_low = 2.0
+ knee_high =2.75
+ v_smooth = 0.5
+ in_family="UNIV"
..subckt $$error_amp_2 VINN BIAS VP VOUT VN VINP
Q8 Q6_C Q6_C VN 0 N1
Q9 Q10_B Q6_C VN 0 N1
V1 D2_N VN 5.5
Q10 VOUT Q10_B Q10_E 0 N1
C1 C1_P Q10_B 270p
D1 Q10_E VN D1
D2 VOUT D2_N D1
E1 C1_P 0 VOUT 0 1
G2 VP G2_N BIAS VN 20u
Q6 Q6_C R2_P G2_N 0 P1
Q7 Q10_B R3_P G2_N 0 P1
R2 R2_P VINN 2.7k
X$S1 VP VOUT BIAS 0 gen_switch : RON=30k ROFF=1G VON=3 VOFF=2 pinnames:
P N CP CN
R3 R3_P VINP 2.7k
..subckt gen_switch 1 2 3 4
S1 1 2 3 4 SW
..model SW VSWITCH RON={ron} ROFF={roff} VON={von} VOFF={voff}
..ends
..model N1 NPN BF=200 TF=0.15n CJC=0.3p VAF=100
..model P1 PNP BF=150 TF=5n CJC=30p VAF=150 RB=100
..model D1 D
..ends
..ends
** UC3843 current mode SMPS controller
** This model will only run on mixed mode versions of SIMetrix
** It will not run with any other SPICE or XSPICE products

Cheers
Terry
From: The Real Andy on 13 Jun 2006 07:03
On Tue, 13 Jun 2006 21:07:43 +1200, Terry Given <my_name(a)ieee.org>
wrote:

>** UC3843 current mode SMPS controller
>** This model will only run on mixed mode versions of SIMetrix
>** It will not run with any other SPICE or XSPICE products

Is that for real?? I wanted to use it with LT's SwitcherCad?

I will try it anyway :)

Many Thanks
From: Terry Given on 13 Jun 2006 07:31
The Real Andy wrote:
> On Tue, 13 Jun 2006 21:07:43 +1200, Terry Given <my_name(a)ieee.org>
> wrote:
>
>
>>** UC3843 current mode SMPS controller
>>** This model will only run on mixed mode versions of SIMetrix
>>** It will not run with any other SPICE or XSPICE products
>
>
> Is that for real?? I wanted to use it with LT's SwitcherCad?
>
> I will try it anyway :)
>
> Many Thanks

No worries mate.

I havent studied it in detail (who cares, I have mixed-mode symetrix)
but I suspect the issue is the interface between the digital and analog.

Cheers
Terry
From: Genome on 13 Jun 2006 09:41

"The Real Andy" <will_get_back_to_you_on_This(a)b.c> wrote in message
news:r1ss82tn24rk3fiiiq8t7vbg6ibd1dhkcp(a)4ax.com...
>I thought one of the big manufacturers would have one. It is a common
> part... sigh..

You could roll your own....

http://www.genomerics.org/genspice/UC384X.asc

DNA


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