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Author Topic: DC-DC Converter  (Read 8589 times)

Offline subzer0

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Re: DC-DC Converter
« Reply #60 on: April 16, 2009, 01:02:01 PM »
Quote from: glutnix_neo on April 16, 2009, 12:50:32 PM
^
Dun sa may 555, switch lang ang mosfet

dun sa design ko ohmic/linear region xa.
nakakasabik naman yan sir parang may eload kanang tunay  :D
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Re: DC-DC Converter
« Reply #60 on: April 16, 2009, 01:02:01 PM »

Offline marcelino

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Re: DC-DC Converter
« Reply #61 on: April 16, 2009, 01:35:26 PM »


yan yung gawa ko... hati yan sa dalawa...

unfortunately, internally connected pala ang UC3610 (napulot lang - wala kasi dito saamin 1n5822). so uulitin ko.

pero from the ground, tama yung mga output nya. 4.95V at 11.9V...

Makikita ninyo, talgang complete with connectors/terminals yan. gagawin ko kasing power supply ng project ko. Pero kailangan ko talgang isolated. kaya dalawang transfromers din ang ilalagay ko dyan.
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Re: DC-DC Converter
« Reply #61 on: April 16, 2009, 01:35:26 PM »

Offline rdpzycho

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Re: DC-DC Converter
« Reply #62 on: April 16, 2009, 02:48:24 PM »
naka-bridge 'yung UC3610, designed for H-Bridge use kasi. hehehe. pero pwede namang isang diode lang ang gamitin.
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Re: DC-DC Converter
« Reply #62 on: April 16, 2009, 02:48:24 PM »

Offline marcelino

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Re: DC-DC Converter
« Reply #63 on: April 16, 2009, 02:57:42 PM »
Quote from: rdpzycho on April 16, 2009, 02:48:24 PM
naka-bridge 'yung UC3610, designed for H-Bridge use kasi. hehehe. pero pwede namang isang diode lang ang gamitin.

kaya nga ate, ni revise ko.... dalawang  UC3610 na ang inilagay ko. di pala pwedeng magshare ang dalawang circuit. hehehe...  buti nalang at nakapulot ako nito. hirap kasi hanapin mga components dito saamin. nagtaka pa yung tindera ng hinigian ko ng "schottky  diode". tapos binigay ko nalang ang parts number "1n5822", wala naman pala. heheh ;D

kaya tuwang tuwa ako sa ebay... tulad nyang resistor (1%), sa ebay yan galing.
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Re: DC-DC Converter
« Reply #63 on: April 16, 2009, 02:57:42 PM »

Offline rdpzycho

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Re: DC-DC Converter
« Reply #64 on: April 16, 2009, 03:10:15 PM »
hehehe. sa Alexan merong SR506, 3A na 50V schottky ata. gamit ko dati sa smps din. hehehe. minsan ginagamit ko rin 'yung parasitic body diode ng MOSFET, pero hindi sa commercial design. ;D ;D ;D
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Re: DC-DC Converter
« Reply #64 on: April 16, 2009, 03:10:15 PM »

Offline RaffT

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Re: DC-DC Converter
« Reply #65 on: April 16, 2009, 03:22:38 PM »
ayos! ginawa mo na pala.. hehehe yung mga coil mo nasa 10uH cguro ang isa nyan...
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Offline marcelino

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Re: DC-DC Converter
« Reply #66 on: April 16, 2009, 04:30:46 PM »
Quote from: rdpzycho on April 16, 2009, 03:10:15 PM
hehehe. sa Alexan merong SR506, 3A na 50V schottky ata. gamit ko dati sa smps din. hehehe. minsan ginagamit ko rin 'yung parasitic body diode ng MOSFET, pero hindi sa commercial design. ;D ;D ;D

actually meron sa e-gizmo 1n5822 (3A) at 1n5819 (1A), pero di pa ako nakakapag-order. :)
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Offline the_next_big_name

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Re: DC-DC Converter
« Reply #67 on: April 28, 2009, 04:29:46 PM »
may variable voltage regulator ic ba na from 3v to 28v up to 10amp?
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Online glutnix_neo

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Re: DC-DC Converter
« Reply #68 on: April 28, 2009, 05:11:50 PM »
Quote from: the_next_big_name on April 28, 2009, 04:29:46 PM
may variable voltage regulator ic ba na from 3v to 28v up to 10amp?

May LM317T 1.5-I think kaya nta 28 but it's only 1A, you need to implement current boosting to have 10A, linear regulator xa kaya expect na malaki size at kailangan mo rin ng malaking heatsink for this.
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Offline the_next_big_name

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Re: DC-DC Converter
« Reply #69 on: April 28, 2009, 05:18:04 PM »
uu nga eh, eh sa switch mode, kaya?
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Offline rdpzycho

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Re: DC-DC Converter
« Reply #70 on: April 28, 2009, 05:36:11 PM »
depende sa design ng switch mode. for a start, medyo mataas na power ang 280W sa SMPS. typically, 10W to 50W nag-start ang mga nag-aaral nito.
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Offline 'yus

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Re: DC-DC Converter
« Reply #71 on: April 28, 2009, 07:04:03 PM »
Quote from: the_next_big_name on April 28, 2009, 04:29:46 PM
may variable voltage regulator ic ba na from 3v to 28v up to 10amp?
pwede gumamit nung mga high-output-current opamps,
like nung burr-browm products ng TI..
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Re: DC-DC Converter
« Reply #72 on: April 28, 2009, 08:40:49 PM »
Quote from: the_next_big_name on April 28, 2009, 05:18:04 PM
uu nga eh, eh sa switch mode, kaya?

pwede yta pero selector switch hehehehhe...
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Offline the_next_big_name

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Re: DC-DC Converter
« Reply #73 on: April 28, 2009, 09:12:11 PM »
atche-che...ngeek
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Online glutnix_neo

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Re: DC-DC Converter
« Reply #74 on: April 29, 2009, 07:26:10 AM »
May DC-DC converter ang ASTEC na nabibili sa e-gizmo(surplus), AMPSS series yun pero medyo malaki pa rin yun 3x2 or 4x2 yata ang dimentions nun pero mataas current.

Pero kung magdedesign ka, medyo mahirap requirements mo master lalo na kung wala pa experience at malaking problema dito sa atin ang mahahanapan ng pyesa for this. :-[

I think industry lang ang kaya magproduce nun exept kung mangangahoy ka or magmomodify ;D
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Offline drin20

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Re: DC-DC Converter
« Reply #75 on: October 28, 2010, 12:49:09 AM »
pwedi ba gamitin ang 7805 linear regulator sa cellphone, mp3 player, psp as charger?
supply source ko po is 12 volts / 100 amp deep cycle battery. or  kailangan pa ng current limiter?




 
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Offline rdpzycho

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Re: DC-DC Converter
« Reply #76 on: October 28, 2010, 12:56:33 AM »
^ karamihan naman sa mga bagong gadget sir meron pang dadaanang internal power management kaya ok lang kahit tama lang ang supply voltage.

sa ibang bansa merong mga binebentang portable charger ng PSP na powered ng series NiMH cells. ang laman niya lang is 7805.
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Offline drin20

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Re: DC-DC Converter
« Reply #77 on: October 28, 2010, 01:07:54 AM »
salamat po ^^
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Offline Pro-Engineer

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Re: DC-DC Converter
« Reply #78 on: October 28, 2010, 08:56:06 AM »
Quote from: drin_pogi on October 28, 2010, 12:49:09 AM
pwedi ba gamitin ang 7805 linear regulator sa cellphone, mp3 player, psp as charger?
supply source ko po is 12 volts / 100 amp deep cycle battery. or  kailangan pa ng current limiter?

depende sa battery ng system i.e. voltage and current requirements. may current limiter na ang 78xx series.
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Re: DC-DC Converter
« Reply #78 on: October 28, 2010, 08:56:06 AM »
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