Jamie said:
Hi,
Anyone have a source for a +-12V/200mA+ 5V/2A+ powersupply that has low
voltage ripple (ie less than 10mV output ripple)? Most switchers ie:
http://search.digikey.com/ca/en/products/PW300MA0012F01/271-2480-ND/1245210
seem to have around 50mV on the 5V rail and 100mV on the 12V rails.
cheers,
Jamie
Look at how well this regulates with HV in with loads of ripple and load
swing. Maybe it'll give you some ideas.
Version 4
SHEET 1 1400 680
WIRE 64 32 -64 32
WIRE 272 32 64 32
WIRE 560 32 368 32
WIRE 704 32 560 32
WIRE 64 64 64 32
WIRE 560 64 560 32
WIRE 608 64 560 64
WIRE 560 128 560 64
WIRE 608 128 608 64
WIRE 64 192 64 144
WIRE 352 192 352 80
WIRE 352 192 64 192
WIRE 704 192 704 32
WIRE 352 224 352 192
WIRE 560 240 560 192
WIRE 608 240 608 192
WIRE 608 240 560 240
WIRE 560 272 560 240
WIRE 560 272 416 272
WIRE 416 304 416 272
WIRE 416 304 400 304
WIRE 352 352 352 320
WIRE 704 416 704 272
FLAG -64 112 0
FLAG 704 416 0
FLAG 352 352 0
FLAG 560 352 0
SYMBOL voltage -64 16 R0
WINDOW 3 -42 -11 Left 2
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR Value SINE(155 10 60 0 0 0 1000)
SYMATTR InstName V1
SYMBOL res 48 48 R0
SYMATTR InstName R3
SYMATTR Value 100k
SYMBOL nmos 272 80 R270
SYMATTR InstName M1
SYMATTR Value BUK9219-55A
SYMBOL zener 576 192 R180
WINDOW 0 24 72 Left 2
WINDOW 3 24 0 Left 2
SYMATTR InstName D1
SYMATTR Value 1N5378B
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL res 544 256 R0
SYMATTR InstName R1
SYMATTR Value 10k
SYMBOL nmos 400 224 M0
SYMATTR InstName M2
SYMATTR Value FDB2532
SYMBOL load2 704 192 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName I1
SYMATTR Value PULSE(50ma 1a 0 100us 100us 600ms 1200ms 1000)
SYMBOL cap 592 128 R0
SYMATTR InstName C1
SYMATTR Value .1µ
TEXT 224 8 Left 2 !.tran 0 1 0 startup
Jamie
