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SPICE: increasing RC load constants to simulate delayed response

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of switching power supplies
pull/3/head
Emard 7 years ago
parent 5387e9a7eb
commit 762033c61f
1 changed files with 13 additions and 12 deletions
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23
spice/powersection.spice
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@ -11,25 +11,25 @@ VUSB5V hard_5V 0 PULSE(0V 5V 0.1s 10ms 10ms 9s 10s DC=0
* internal resistor provides "soft" USB 5V
Rusb hard_5V USB5V 0.1
* shutdown pulse every 1 second, start after 0.5s
* shutdown pulse every 1 second, start after 0.4s
* start rise fall duration period
VSHUT shutdown_pulse 0 PULSE(0V 3.3V 0.5s 10ms 10ms 100ms 1s DC=0V)
VSHUT shutdown_pulse 0 PULSE(0V 3.3V 0.4s 10ms 10ms 100ms 1s DC=0V)
* convergence friendly resistor
RSHUT shutdown_pulse SHUTDOWN 220
* power up button pulse every 10 seconds, start after 0.7s
* start rise fall duration period
VPWRBTN pwrbtn_pulse 0 PULSE(0V 3.3V 0.7s 10ms 10ms 100ms 10s DC=0V)
VPWRBTN pwrbtn_pulse 0 PULSE(0V 3.3V 0.9s 10ms 10ms 100ms 10s DC=0V)
* RTC internal wakeup pulse every 10 seconds, start after 1.7s
* start rise fall duration period
VWAKEUP wake_pulse 0 PULSE(0V 3.3V 1.7s 10ms 10ms 100ms 10s DC=0V)
VWAKEUP wake_pulse 0 PULSE(0V 3.3V 1.9s 10ms 10ms 100ms 10s DC=0V)
* convergence friendly internal resistor
Rwk wake_pulse wake_base 1k
* FTDI_nSLEEP signal every 10 seconds, start after 2.3s
* start rise fall duration period
VFTDI FTDI_nSLEEP 0 PULSE(0V 3.3V 2.3s 10ms 10ms 0.5s 10s DC=0V)
VFTDI FTDI_nSLEEP 0 PULSE(0V 3.3V 2.2s 10ms 10ms 0.5s 10s DC=0V)
* RTC internal NPN transisfor for open collector output
Qwk WAKEUPn wake_base 0 BC847
@ -37,7 +37,7 @@ Qwk WAKEUPn wake_base 0 BC847
* hard 3.3V voltage
Vhard3V3 hard_3V3 0 3.3V
* internal resistor provides "soft" 3.3V
Rsmps hard_3V3 PWR3V3 0.01
Rsmps hard_3V3 PWR3V3 10
* base resistor
R6 WAKEUPn WKn 1k
@ -89,9 +89,9 @@ R10 FTDI_nSLEEP FTDI_nSUSPEND 220
D12 FTDI_nSUSPEND PWREN N4148
* The load
RL P3V3 0 1
CL P3V3 0 100uF
* The load (slow)
RL P3V3 0 100
CL P3V3 0 1000uF
.TRAN 1ms 3s
@ -107,6 +107,7 @@ CL P3V3 0 100uF
.MODEL N7002 NMOS (LEVEL=1, VTO=2.5, KP=40, RS=0.033, RD=0.034)
* todo
* BAT42 schottky diode model doesn't simulate wanted 0.25V drop
* [ ] BAT42 schottky diode model doesn't simulate wanted 0.25V drop
* the BAT42 model seems to have 0.7V drop
* [ ] delay: switch power 3.3V doesn't start immediately
* [ ] control signals should be derived from P3V3 line

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