China Made Portable Fan - 2

Basic spec shown on the label attached to the product:

Input Voltage: DC 5V

Output Voltage: DC 5V - 9V

Input Current: 0.5A -1A

Output Power: 4W (Max?)

Battery Type: Li-ion 18650

Battery Voltage: 3.7V

I purchased this fan 2-3 years ago. It does works due to some problem. No brand or so called Generic China made. The shape is common. A bit too large for my (man) one hand to keep holding it. Three step motor (peed) control 3 - 2 - 1 (strongest wind).

On PCB Board

U1 - 14 pin IC - no marking. For motor operation and control, plus some other functions.

U2 - DW01 - Battery protection IC

U3 - 4056 - Battery charging IC

U4 - AL462 (not identified). 6P IC. As located colsoe to Coil 4.7uH it may be Up-Converter IC.

Q1 - AOLA (not identified) Maybe MOSFET N-Chanel2300 or similar one

Q2- 2301-P MOSFET (P-Channel) (*). N-Channel is 2300 (see the previous Post)

Q3 - J3Y marking for Transistor S8050.

Q4 - no part found on PCB (skipped for some reason)

D1, D4 - SS34 (Schottkey)

LED 2, 4, 5, 6, 7, 8

L2 - 4.7uH

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U2 - DW01

U3 - 4056

Q1 - AOLA (not identified). Maybe MOSFET N-Chanel 2300 or similar one

Q2- 2301-P MOSFET (P-Channel) (*)

D1, D4 - SS34 (Schottkey)

L2 - 4.7uH

These are used also in the fan I reported (China Made Portable Fan)

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Motor

I do not know what kind of  motor this.

It has a outer magnet ring covered by metal

Horizontal Four Big Coils

Then at the center a spinning shaft which is fixed to the center of the fan with four blades (not seen in this photo).

One Hall Sensor (not seen in the photo, easily broken later when tried to move)

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(*) There are so many suppliers of this part.

NX2301P  Nexperia

ST2301A   Stanton
SQ2301ES  Vishay
SSM2301N  Silicon
AFP2301A Alfa MOS
AM2301PE  Analog Power
MSP2301N3  Bruckewell
STP2301  Stemtron
TSM2301B   Taiwan Semiconductor
TP2301PR  Tiptech
CHT2301GP  Chenmko
LP2301ALT1G  LRC
KI2301BDS  Kexin
PJ2301  Pan-Jit
KI2301DS  T-Y Semiconductor
MMP2301   M-MOS
CJ2301-HF  Comchip
CJ2301S   Jiangsu Changjiang Elec.
RN2301  Toshiba
SI2301   MCC (Micro Commercial Components)
DMG2301U  Diodes
XTP23015CFH   Zetex (Diodes Group now)
UT2301Z  UTC
SMG2301  SECOS Elektronische Bauelemente
SI2301   HT Semi
CES2301  CET
GM2301   Guilin Strong Micro-Electronics Co.,Ltd.
WTC2301   Weitron
SE2301   Willas
H2301N   Hi-Sincerity
AP2301EN-HF   Advanced Power
MTP2301S3   CYStech
2301, 2301L   Goford
STS 2301   SamHop Microelectronics Corp.
SSF2301A  Silkron
2301   ShenZhen CanSheng Industry Development Co.,Ltd
PPMT2301   Prisemi

and some more.

2300 (N-Chanel MOSFET)

ST2300SRG   Stanton

AM2300   AiT Semiconductor
STN2300A   Semtron
AM2300N   Analog Power
KI2300(SI2300)   Kexin
SI2300A   UMW   Marking C009T
Si2300DS   Vishay
MTN2300N3   CYStech
2300   Goford
STS 2300S   SamHop Microelectronics
SSF2300B   Silkrom
2300  ShenZhen CanSheng Industry Development Co.,Ltd
SM2300NSA   Sinopower
DMN2300U   TY Semiconductor Marking NJU
SI2300 (KI2300)  Kexin
SI2300  Shenzhen Tuofeng Semiconductor

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Similar but another model with a fan

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China Made Portable Fan

Portable Fans have become more and more popularly used and seen every summer. I opened several budget models costing less than HK$100 or US$12.80. The one I found with a price tag just HK$25 or US$3.20 was worth opening to see inside how poorly made inside. I was surprised to find so many parts being used to control the motor and Li-Ion battery.

Size: 95 x 35 x 195mm (about 20cm high)
Weight: 160g
The photo dose not show but charged by a common USB connector included . It operates at three different speeds - powers but no power ratings shown in the simple spec. This is not a generic brand.


Motor Control side

AD1: 8-pin IC has no marking but＜555＞is seen near it on the PCB.
D2: A big diode SS34 (Schottkey) 3A 40V
Coil 4R7 (4.7uH)
IC2: A small 6 pin IC. The marking shows <BC71X> but not identified. As closed to SS34 and Coil L3: 4R7 this is supposed to be (dual) MOSFET? One dual MOSFET is found on the other side. Or <BC> may mean Boost Converter.
Two small SMT LEDs Green and Red for showing battery charging status.The marking on PCB are L1 and L2 not Dxx (of Diode).

The markings on PCB are modern, IC1, IC2, IC3 are used instead of U1, U2, U3 though U1 exists on the back. AD1 may mean Analog to Digital Conversion IC ?  But 555 is an AD Converter IC ? Yes. The following and some articles on the net

https://www.eeweb.com/circuit-projects/555-timer-as-an-analog-to-digital-converter
"
This 555 timer based circuit is a kind of voltmeter, also an analog to digital converter, that converts the analog input voltage to digital output pulses.
"
Wiki on 555 IC says

"
As of 2003, it was estimated that 1 billion units were manufactured every year.^[5] The 555 is the most popular integrated circuit ever manufactured.^[6][7]
"

But I have seldom seen 555 IC. This is not the first time to encounter but not often.


Battery Control side

IC1:  8-pin IC: TP4056 -  Lithium Ion battery charger IC
U1: 8205S - dual MOSFET
IC3: DW01A - Li-Ion battery protection IC
Q1: A1SHB - this is a marking on the part. P-Channel MOSFET. I found many different suppliers marking this part with their own part numbers like HM2301B, MS23P01S, even Si2305D, etc. but the same marking on the part. Strange. (*)
Q2: 2300 - N-Channel MODFET (cannot seen in the above photo as located at the back of the connector.
As you can see (or cannot see)  below, these Q1 and Q2 are not used for Battery Control but for Motor control.

These three parts (+ two SMT LEDs) are found below (a copy and paste from the net)

I found the following on the net.

Here you are looking at the 3 chip breakout board (TP4056, DW01A and 8205A MOSFET).

TP4056 Breakout Board Schematic

So this design may be very common.


(*) ＜A1SHB＞ marking

HM2301B   H&M Semiconductor, Vishay
SI2305DS   SHENZHEN TOPSKY TECHNOLOGY CO.,LTD
2301L   Goford
MS23P01S   Bruckewell
Si2301DS    Vishay Marking  ＜A1SHB＞
Si2305DS    Vishay Marking  ＜A5SHB＞

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