Use Full MOST COMMON I.C FOR LAPTOP YOU SHOULD HAVE IN STOCK

Charging IC

8682L OZ8682L OZ8682LN QFN-16 Chipset
OZ8681LN OZ8681L OZ8681 8681 8681L QFN-16 Chipset
ISL88731CHRTZ ISL88731C 88731C QFN-28 Chipset
ISL88731HRZ ISL88731QFN-28 Chipset
ISL6251AHAZ ISL6251A ISL6251 SOP-24
ISL95521HRZ ISL95521 95521HRZ QFN-32 Chipset
AXP288 QFN-76
AXP288C QFN-76
CD3301 CD3301RHHR QFN-36 Chipset
CD3301BRHHR CD3301B QFN-36
BQ24705
BQ24707 BQ707
BQ07A BQ24707A QFN-20
BQ715 BQ24715 BQ24715RGRR QFN-20 Chipset
BQ24717RGRR BQ24717 BQ717QFN-20 Chipset
BQ25A BQ24725A QFN-20
BQ24725 QFN-20
BQ24721C 24721C QFN-32
BQ727 BQ24727 QFN-20
BQ728 BQ24728 QFN-20
BQ735 BQ24735 BQ24735RGRR QFN-20 Chipset
BQ737 BQ24737 QFN-20
BQ24738 BQ24738RGRR BQ738 QFN-20 Chipset
BQ24740RHDR BQ24740 QFN-28 Chipset
BQ24745RHDR BQ24745 24745 QFN-28 Chipset
BQ24747RHDR BQ24747 24747 QFN-28 Chipset
BQ24760 24760 QFN-40
BQ24780S 24780S QFN-28
BQ24780RUYR BQ24780 24780 QFN-28


Super IO

KB9022Q D KB9022QD QFP-128
KB9012QF A3 KB9012QFA3 QFP-128
KB3926QF D2 QFP-128
KB3940Q A1 QFP-128
KB3930QF A1 QFP-128
KB3930QF A2 QFP-128
KB926QF D3KB926 QF D3 QFP-128 Chipset
KB3926QF CO KB3926QF C0 QFP-128
KB9016QF A3 QFP-128 Chipset
KB9028Q C QFP-128 Chipset
KB9022Q C QFP-128 Chipset
KBC1098-NU
MEC1404-NU MEC1404 NU QFP-128 Chipset
IT8518E CXA CXS HXA HXS QFP-128
IT8892E FXA FXS EXA EXS QFP-128
IT8987E BXA BXS QFP-128 Chipset
IT8985E AXA AXS QFP-128 Chipset
IT8517E HXS HXA QFP-128
IT8502E KXA KXS JXA JXS JXO JXT QFP-128 Chipset
IT8586E FXS FXA QFP-128
IT8572E AXA AXS QFP-128 Chipset
IT8528E AXA AXS EXA EXS FXA FXS QFP-128 Chipset
NPCE781BAODX NPCE781BA0DX QFP-128
NPCE985LAODX NPCE985LA0DX QFP-128
NPCD379HAKFX QFP
NPCE285PA0DX NPCE285PAODX QFP-128 Chipset
NPCE795LAODX NPCE795LA0DX QFP-128 Chipset
NPCE791LAODX NPCE791LA0DX QFP-128 Chipset
NPCE288NA0DX QFP-128 Chipset
NPCE885PAODX NPCE885PA0DX QFP-128 Chipset
NPCE388NA1DX NPCE388NAIDX QFP-128 Chipset
NPCE794LAODX NPCE794LA0DX QFP-128
NPCE783LAODX NPCE783LA0DX QFP-128
KBC1126-NU KBC1126 QFP-128



Step Down

3.3v , 5v & Chipset 1.05v*
SY8208BQNC SY8208B SY8208 (MS3VM MS4BB MS5BC...) QFN-6
SY8208CQNC SY8208C SY8208 (MT3TD MT4CC MT5FA MT...) QFN-6
SY8206DQNC SY8206D SY8206 (NF5LA NF4UF NF2ZZ NF3NA NF2AZ NF03A) QFN-6
SY8206B SY8206BQNC (ND5MC ND4LL ND3NA ND2CZ... ) QFN-6 Chipset
SY8288C SY8288CRAC BAC5KA QFN-20 Chipset
SY8286RAC SY8286R SY8286 (BAA5XA BAA4DE BAA6FR BAA...) QFN-20 Chipset
SY8868QMC SY8868Q SY8868 K13BA QFN-10 Chipset
SY8286 SY8286C SY8286CRAC AWW5MB AWW5LA AWW5 QFN-20 Chipset
SY8286 SY8286B SY8286BRAC AWV5LC AWV5QB AWV5 QFN-20 Chipset
NB669GQ-Z NB669GQ NB669 (AEVD) QFN-14
NB670GQ-Z NB670GQ NB670 (ADZD )QFN-16
NB680GD-Z NB680GD NB680 (ALVF ALVE ALVD ALV...) QFN-12
ADP3193AJCPZ ADP3193AJ ADP3193A QFN-32 Chipset
RT8237CGQW RT8237CZQW RT8237C (Z3 EH,Z3 ED,Z3 EV...) QFN-10 Chipset
TPS51211 S51211 QFN-10
TPS51601 TPS51601DRBR QFN-8 Chipset
TPS2231 2231 QFN-20 Chipset
NCP5911MNTBG NCP5911 (AL1 ALK...) QFN-8 Lenovo Z570 CPU Core Driver IC
RB29666 TPS22966 TPS22966DPUR QFN-14 Chipset


APL3523AQBI APL3523A 3523A QFN-14
ICS9LPRS3197AL ICSRS3197AL RS3197AL QFN-32 Chipset Clock IC



Resistors Set & Capacitors

0402 SMD Capacitor kit 30 values*40pcs 1PF-10UF 1200PCS
0402 SMD Resistor Kit Assorted Kit 10ohm-910kohm 1% 80valuesX50pcs=4000pcs
Bios Adapter 1.8V SPI Flash SOP8 DIP8 W25 MX25 use on programmers RT809F TL866CS TL866A EZP2010 EZP2013 CH341



Bios Chip

W25Q64FVSSIG W25Q64FVSIG 25Q64FVSSIG SOP-8
W25Q32FVSSIG W25Q32FVSIG 25Q32FVSSIG 25Q32FVSIG 25Q32 SOP-8
W25Q16BVSSIG W25Q16BVSIG 25Q16BVSSIG 25Q16BVSIG 25Q16 SOP-8
MX25L12835FM2I-10G 25L12835FM2I-10G 25L12835F Chipset
MX25U6435FM2I-10G MX25U6435FM2I 10G 25U6435FM2I-10G 25U6435F
W25Q64FWSIG W25Q64FW 1.8V SOP-8
W25Q128FWSG W25Q128FW 1.8V SOP-8
W25Q128FVSSIG W25Q128FVSIG 25Q128 SOP-8




MOSFET

AO4466 4466 MOSFET SOP-8
AON7702A AO7702A 7702A MOSFET QFN-8
AON7410 AO7410 7410 MOSFET QFN-8
AO4407 4407 MOSFET SOP-8
(IRF6721 + IRF6725) IRF6721 IR6721 IRF6725 IR6725 STEEL MOSFET
AO4606C SOP-8 AO4606
AO4409 SOP-8
AO4423 SOP-8 MOSFET
AO7408 QFN-8 MOSFET
AO4435A SOP-8 4435
AON6414A AON6414 AO6414A 6414A QFN-8
AON4468 AO4468 4468 sop-8 Chipset
AP4957AGM-HF AP4957AGM SOP-8
FDMC8884 8884 QFN-8 Chipset
AON7934 AO7934 7934 QFN-8 Chipset Dual NChannel Mosfet Switching
24717


Socket LGA1155 CPU Base Socket PC BGA Base ( Out of Stock)



Step Down

TPS51225RUKR TPS51225 51225 QFN-20
TPS51225CRUKR TPS51225C 1225C 51225C QFN-20
TPS51275B 51275B 1275B QFN-20
TPS51125A 51125A QFN-24
TPS51225B 51225B 1225B QFN-20
TPS51275C 51275C 1275C QFN-20
51123 TPS51123 TPS51123RGER QFN-24
TPS51125RGER TPS51125 51125 QFN-24
RT8223PGQW RT8223PZQW RT8223P (20=EL 20=DF 20=FF 20...) QFN-24
RT8243A RT8243AZQW (8A EE,8A EF,8A EC...) QFN-20 Chipset
TPS51220RHBR TPS51220 51220 QFN-32 Chipset
TPS51020 PS51020 sop-30 Chipset
TPS51120 51120 QFN-32 Chipset
TPS51285B 51285B 1285B
51123A TPS51123A TPS51123ARGER QFN-24 Chipset
TPS51427A TPS 51427A TPS51427ARHBRG4 QFN-32 Chipset
ISL6259HRTZ ISL6259 6259HRTZ QFN-28 Chipset Macbook
ISL6259A 625 ISL625 I6259AHRTZ ISL6259AHRTZ QFN-28 Chipset Macbook
ISL 9237HRZ ISL9237HRZ QFN-32 Chipset
RT7291BGQUF 4M=1J 4M=3C 4M= QFN-14 Chipset
RT8206BGQW RT8206B QFN-32
RT6576D RT6576DGQW 6S=3J 6S=2L 6S=1D 6S=2B 6S=2C 6S= QFN-20 Chipset
RT8223BGQW RT8223B(DS=CA DS=CF DS=BJ DS=CD DS=) QFN-24 Chipset
RT8205BGQW RT8205B (CK=EM CK=CM CK=...) QFN-24 Chipset
RT8206AGQW RT8206A RT8206 QFN-32 Chipset
SN608098 SN 608098 QFN-32 Chipset
MAX8734A MAX8734AEEI sop-28 Chipset
PM6640 ST6640 6640 QFN-10 Chipset Macbook
RT8205LGQW RT8205LZQW RT8205L (EM DA,EM DB,EM...) QFN-24
2Q=1E 2Q=2D 2Q=1J 2Q= QFN-20 Chipset
TPS51980 TI 51980 QFN-32
T8243BZQW 7A EC QFN-20 Chipset
TPS51980A 51980A QFN-32

Ram Supply IC

RT8207MZQW RT8207M (J7=FA,J7=FF,J7 FF...) QFN-20
TPS51716 51716 QFN-20
RT8209MZQW RT8209MGQW RT8209M A8=EC A8=CK A8=DF QFN-14 Chipset
RT8207P RT8207PG RT8207PGQ RT8207PGQW 4B=1D 4B=DM 4B=EL 4B= QFN-20 Chipset
PS51117RGYR TPS51117 51117 QFN-14 Chipset
GL850G
TPS51216 51216
TPS51916 51916
G5934RZ1U G5934 5934 QFN-20 +VH28 IC
P2806 QFN-20 +VH28 IC

CPU Core IC

RT3601 RT3601E RT3601EA RT3601EAGQW QFN-28 Chipset
NCP6121MNR2G NCP6121 QFN-52
NCP81101MNTXG NCP81101 QFN-28
NCP81206 PCP81206 NCP81206MNTXG QFN-52 Chipset
NCP81218MNTXG NCP81218 81218 QFN-52
NCP6132B QFN-60 Chipset
ISL6262ACRZ ISL6262A ISL6262 QFN-48
ISL95838HRTZ ISL95838 95838HRTZ QFN-40
ISL6266AHRZ ISL6266A QFN-48
ISL95833HRTZ ISL95833IRTZ ISL95833 QFN-32
ISL95831BHRTZ ISL95831B 95831B HRTZ QFN-48 Chipset
ISL62882CHRTZ ISL62882C 62882C QFN-40 Chipset
APW8713AQBI APW8713A APW8713 QFN-23 Chipset ( AOZ1267QI-03 QFN-23 )
NB672GL NB672 672 (NBFG672 NBDA672 NBFA672... ) QFN-21 Chipset
RTD2136S QFN-48
RTD2136R QFN-48
RT8171C 3L=1M 3L= QFN-32 Chipset


Buck Converter

Mini DC-DC 12-24V To 5V 3A Step Down Power Supply Module Voltage Buck Converter Adjustable Efficiency 97.5% 1.8V 3.3V 5V 9V 12V
Mini-360 model step-down power module DC DC low power module vehicle power supply - Better than LM2596
MT3608 2A Max DC-DC Step Up Power Module Booster Power Module For Arduino 3-5V to 5V/9V/12V/24V
TTP223 Touch button Module Capacitor type Single Channel Self Locking Touch switch sensor


Audio IC

ALC233 QFN-48

Thanks - BadCaps

Compal LA-3571P Charging Circuit Analysis

Last time I promised to have time to make up the charging circuit. Today I will talk about the charging circuit of F41 with you. The charging chip used in F41 is Fujitsu's MB39A126PFV. Let's explain it in several parts.

First understand the pin definition

1.-INC2: current detection amplifier 2 inverting input terminal
2.OUTC2: current detection amplifier 2 output terminal
3.+INE2: error amplifier 2 non-inverting input terminal
4.-INE2: error amplifier 2 inverting Input terminal
5.ACOK: Output terminal of the power adapter voltage detection module. When ACOK is low, ACIN is high.
When ACOK is in a high-impedance state, ACIN is low and CTL is low.
6.VREF: 5V reference voltage output terminal
7.ACIN: Power adapter voltage Detection module input terminal
8.-INE1: error amplifier 1 inverting input terminal
9.+INE1: error amplifier 1 non-inverting input terminal
10.OUTC1: current detection amplifier output terminal
11.SEL: charging voltage setting terminal, used when it is high 16.8V charging voltage, when it is low, use 12.6V charging voltage
12.-INC1: current detection amplifier inverting input terminal
13 .+INC1: current detection amplifier non-inverting input terminal
14.CTL: power supply control terminal, when the chip is low Standby state
15.FB123: error amplifier 1 2 3 output terminal
16.-INE3: error amplifier 3 inverting input terminal
17.RT: triangular wave oscillation frequency setting resistor connection terminal
18.XACOK: power adapter voltage detection module output terminal, XACOK When ACIN is high, XACOK is high impedance, CTL is low, when XACOK is low, ACIN is low
19.VH: MOS tube drive circuit power supply terminal VH=VCC-6V
20.OUT: External MOS tube gate drive output terminal
21.VCC: Reference voltage, control circuit, power supply terminal of output circuit
22.CS: Soft start setting capacitor connection terminal
23: GND: Ground wire connection terminal
24: +INC2 : Current sense amplifier non-inverting input

 

 

Simple understanding of the internal structure

1. Current detection amplifier 1: the amplification factor is 20 times, used to detect the charging current in this machine, PR56, connected to a 20 milliohm current-limiting resistor. 2. Current detection amplifier

2 : the magnification is 20 times, used to detect the adapter current in this machine, connected to PR45, 20 milliohm current limiting resistor.

3. The internal oscillator generates a 1.5V-2.5V triangular wave, and the frequency is calculated to be 395KHZ , (the highest frequency is 500KHZ). Interested friends can test whether it is this value, which can be measured on the resistance of pin 17.

4. Error amplifier 1: The non-inverting terminal is the IREF sent by EC, the amplitude is between 0.574V-2.56V, the voltage of this signal directly affects the maximum charging current. After PR60 and PR63, the highest value is approxim ately equal to 1.1V, and the reverse terminal is connected to the current detection amplifier 1. The principle is: the charging current will generate a voltage drop on the PR56, which is amplified 20 times by the current detection amplifier 1 and compared with the IREF after the voltage division. When 8PIN is higher than 9PIN, it means that the charging current has exceeded the maximum value set by EC. recharging current. The PWM module will reduce the on-time of PQ13, thereby reducing the charging current.

5. Error amplifier 2: The non-inverting terminal is VREF, which is divided by PR54 and PR53. You can see that according to the different power of the adapter, PR54 will take different values. We calculate by 90W, and +INE2 is also about 1.6V. The working principle is the same as charging current detection. The maximum current of the adapter is limited to 4A. If it exceeds 4A, the charging current will also be reduced to reduce the system current. Here also send ADP_I to EC, it should be that after the voltage of OUTC2 reaches a certain range, EC will find a way to reduce the system current after receiving ADP_I exceeding the threshold.

 

6. Error amplifier 3: The SEL of this machine is grounded and uses a charging voltage of 12.6V. The reverse terminal is formed by the charging voltage after being divided by a resistor, and the same phase terminal is fixed at 3.15V. When The charging voltage is too high and exceeds the After 3.15V, the output of the amplifier will be low, which will also reduce the conduction time of the external MOS tube, so as to stabilize the charging voltage. This is for constant voltage charging . Similarly, when the charging voltage is too low, the tube conduction time, increasing the charging voltage will also prolong the MOS and other modules, so I won't go into details here.

Three: The actual circuit of F41
I have not actually measured the charging circuit of this machine, the following contents are all theoretical values. Everyone can verify.

1. Charge control
    CTL is the main switch of MB39A126. If it is low, even VREF will not be generated. Here, it is controlled by two signals (ACON is open circuit). EC_ON: Through the last analysis, you should know that This signal is before pressing the switch and letting go. The EC is issued.

    FSTCHG: Literally, it means fast charging, and you can also understand it as a charging enable signal. The EC reads the battery information from the 5 and 6-pin SM bus of the battery interface, sends out FSTCHG when charging is required, and sends it all the way to the CTL of MB39A126, and controls the CS through PQ19 and PQ18 all the way. We can know from the pin definition that here CS is used as Soft-start pin, if FSTCHG is invalid, then CS will be directly pulled to the ground, soft-start cannot be completed, and the charging voltage cannot be generated. All FSTCHG also serves as an important condition for generating charging voltage.

 

2. The power supply of MB39A126
    is 21-pin VCC, which is 19V power supply. P2 is directly added to 6-pin VREF on the chip through PR49. After CTL and VCC are normal, there will be 5V output 19-pin VH , which is powered by the gate driver of charging tube PQ13. Let VCC-6V be VH, which means that the gate voltage of PQ13 ranges from 13V-19V. Of these three voltages, only VCC is supplied externally, and the other two should be output after the chip works normally, so it can be used as The basis for judging whether the chip is good or bad, but it can only be used as a reference, because VREF will be turned off after the chip is protected. In addition , the external timing resistor of the chip must be normal.

 

2. Start charging
    . If the above conditions are met, MB39A126 should start working. The EC sends an IREF with a minimum of 0.574V and a maximum of 2.56V to control the charge current. The error amplifier 1 is used to control the const ant current charging until the battery voltage is close to 12.6V, and then it will be converted to 12.6V constant voltage charging. You can think about it. If you don't do this, if you directly use 12.6V to charge the battery from the beginning, if the battery is discharged to a relatively low voltage, this will cause damage to the battery, so it must be charged to close to 12.6V before starting constant voltage charging.

 

    The maximum current during constant current charging (CC mode) is 2.56A, the second CP POINT=2.8AI don't know what it means, but the formula in the box calculates the upper limit of the system current, which should be the maximum limit of the adapter The power is about 53W. As you can imagine, the 65W adapter is limited to about 53W. Therefore, it is impossible to provide the maximum charging current when the machine is running, and the maximum charging current of 2.56A can only be achieved during standby. The third box means that SEL is charged with 12.6V and constant current-constant voltage for low voltage.

    To understand the charging circuit, it is necessary to read its internal block diagram. In addition, the settings of the chip are different from those of ordinary switching power supplies. There are more settings for charging current, charging voltage, etc., and the system current must be detected. MB39A126 also has adapter detection function, which is not used in F41. Today, I will talk to you here first. If you have any questions, you can discuss them together. The charging circuit is actually not difficult to repair, as long as you have a good grasp of its working principle and working conditions.

 

Toshiba M115 Irregular Power Off

 One exception of TOSHIBA M115 power-on and power-off maintenance

A piece of difficult fault board was sent by a colleague in the same place for repair. The description of the fault is that the power-on is normal, but after a short period of time, it will power-off and go to standby state, which can be triggered repeatedly. 

No matter what working state the machine is in, it will be powered off. According to the phenomenon that it can be triggered again after power failure , it can basically be ruled out that the protection action of the temperature protection circuit (because according to the circuit design of this machine, if the temperature protection is effective, then the turn-on signal of the standby voltage will also be pulled down. The machine will definitely not be able to trigger).

Then contact the customer for the maintenance process before sending it for repair. It has been judged that the cause of the power failure is that the RSMRST# of the south bridge is pulled low, which leads to the low SLP_S5# and SLP_S3# of the machine, and directly enters the S5 state. Because the RSMRST# signal is sent to the south bridge by the EC chip, and the EC has no related control signal. 

After searching for a long time, no direct control signal was found, so the The biggest possibility is that the abnormal operation of the EC causes RSMRST# to be It is very simple to judge whether this situation is the cause of power failure, directly cancel the control of RSMRST# by EC, and use another signal as the reset signal for the south bridge to return to the suspend circuit.

Just do it when you think of it, so first disconnect the line from EC to South Bridge, and then directly connect the signal to the voltage of +3VAL through a 1K resistor at the south bridge end, and then power on again, the machine is automatically triggered, this is As expected, then keep the machine turned on for one minute, two minutes. . All the way to five. It didn't lose power for a few minutes. It seems that the power failure was caused by EC pulling down RSMRST#. 

At this time, although the machine can work normally, the customer must not accept it, because as soon as the adapter is plugged in, the machine will automatically trigger the boot, so there is no other way.

Find the root of the problem, and things will be easy to handle. Just find a signal with a timing similar to the RSMRST# signal to replace it, but after careful consideration, this is not the case, because the SUS power supply of this machine is sent when it is in standby.

However, RSMRST# is sent out after triggering, and there is no other signal similar to RSMRST# in timing, so it is only necessary to build another circuit to provide RSMRST# in accordance with the timing , referring to the design of ASUS Idea, draw a sketch, and then construct according to the drawing. One hour later, the circuit structure is completed, the machine is powered on, the machine is in normal standby, triggered, and then powered on , everything is running normally. 

 .