What Is The Role Of Smps Ic N4200 In N70? - GSM-Forum

zone2 · 11-09-2007, 18:15

In N70 Smps Ic N4200 Has 10 Pins.
Two Pins R Input From Battery +ve
Two Pins R Output Vcorea=1.4v (one Doubt Here Tahvo Has Also
A Power Outut Named Vcore=1.4v,is Both R Same Line?)

Power Output Voltage R Same 1.4v.but A Small Difference In Output Names.smps Output Name Vcorea And Tahvo Output Name Vcore.

I Think Both Above R Connected Each Other.i Have Seen Many Shorting Methods For N70 Without Smps Ic.then How Work Omap Without Smps Output?

y2y · 11-09-2007, 18:40

No. that both voltage are not connected each other, as u mentioned before : Vcore came from tahvo and VcoreA came from smps ic.

The method that shorting VcoreA with Vcore was used because both have the same voltage, tahvo will release Vcore when he get voltage from battery and control from retu.

saiftc2 · 01-10-2008, 08:13

@ Mr.zone2

can give me a schematic of SMPS ??

GsmJoman
Tc

mudho · 07-05-2012, 11:22

i have the same problem

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11-09-2007, 18:40	#2 (permalink)
y2y Freak Poster Join Date: Jul 2005 Location: Java Age: 46 Posts: 212 Member: 166000 Status: Offline Thanks Meter: 26	No. that both voltage are not connected each other, as u mentioned before : Vcore came from tahvo and VcoreA came from smps ic. The method that shorting VcoreA with Vcore was used because both have the same voltage, tahvo will release Vcore when he get voltage from battery and control from retu.

01-10-2008, 08:13	#3 (permalink)
saiftc2 No Life Poster Join Date: Feb 2006 Location: iraq Posts: 1,136 Member: 231662 Status: Offline Sonork: 1607488 Thanks Meter: 390	@ Mr.zone2 can give me a schematic of SMPS ?? GsmJoman Tc

07-05-2012, 11:22	#4 (permalink)
mudho Junior Member Join Date: Jun 2012 Posts: 5 Member: 1768490 Status: Offline Thanks Meter: 0	i have the same problem