Category:Mosfet

Working Method

• 

  PMOS NMOS current flow direction

• 

  NMOS and PMOS Drive

• 

  mosfet type symbol

Advantages of Mosfet

• Optional use optical coupler, isolate signal, anti interferance.
• High level signal turn ON, low to OFF, PWM to control speed

Common Used Applications

• motor start and stop
• solenoid valve
• Bulb
• LED Strip
• Micro Water Pump
• Solenoid Valve

Compare to Relay

• High speed turn on and off
• no noise, no spark, no interferance
• longer life time

Parallel Connect MOSFET

• Lower internal resistance
• Higher passing current, higher driving power

Specifications

• VGS(th) 1-2.5V

Selection Guide

SOT23-3

Type	Series	Type	VDS (V)	ID	RDS(ON)	Mark	Price
SI2301	SI	P	-20V	3.1A	-	A1SHB
SI2302	SI	N	20V	2.4A	-	A2SHB
SI2305	SI	P	-8V	3.5A	-	A5SHB
Si2306	SI	N	30V	~3A	-	A6SHB	0.1
Si2307	SI	P	-30V	2.7A	-	A7SHB
Si2308	SI	N	60V	~2.0A	-	A8SHB
AO3400	AO	N	30V	~6A	-	A09T	0.08
AO3401	AO	P	-30V	~4A	-	A19T	0.08
AO3402	AO	N	30V	~4A	-	A29T
2N7002	CJ	N	60V	0.3A	-	7002	0.07
IRLML2502	IRF	N	20V	4.2A	-	GFDMR / 1G9K
IRLML5203	IRF	P	-30V	3A	-	?

Not-sort

Type	VDS (V)	ID	RDS(ON)	Type	C/O	Mark	Special
FR120N	100V	9.4A
LR7843	30V	161A
35N06	60	35A	RDS(ON) ＜ 23mΩ (VGS = 10V) RDS(ON) ＜ 33mΩ (VGS = 4.5V) RDS(ON) ＜ 37mΩ (VGS = 4V)
CJ3402-N/CJ3407-P	30V	4A		N/P	CJ
AOD3415	20V	4A	-		AO
AO3416	SOT-23	20V	6.5A	RDS(ON) (at VGS=4.5V) < 22mΩ RDS(ON) (at VGS = 2.5V) < 26mΩ RDS(ON) (at VGS = 1.8V) < 34mΩ
AOD484	30V	25A	-		AO
AOD4184A	40V	50A	RDS(ON) < 7mΩ (at VGS=10V) RDS(ON) < 9.5mΩ (at VGS = 4.5V)	N	AO
AOD417	-30V	-25A	RDS(ON) < 34mΩ (VGS = -10V) RDS(ON) < 55mΩ (VGS = -4.5V)	P
BSS138	20V	0.22A	RDS(ON) = 3.5Ω @ VGS = 10 V RDS(ON) = 6.0Ω @ VGS = 4.5 V	N	BSS
AP85T03GH/J	30V	75A	6mΩ
IRFR1205	55V	44A	27mΩ
IRFR5305	-55V	-31A	0.065Ω
IRF540	100V	33A	44mΩ
IRFR5410	-100V	-13A	0.205mΩ
IRFR9120	-100V	-6.6A	0.48Ω
APM4953	-30V	-4.9A	53mΩ(typ.)@VGS=-10V			Dual
IRLML6401	SOT-23	-12V	-3.4A	0.05Ω
SI304BDL-N	30V	0.9A
SSM3J332R	30V	6A
FDN340	20V	-2A	P

Pending

• IRS2004STRPBF SOP8
• IRF8707TRPBF SOIC8

Schematic

• 

  Mosfet SCH 01

Mosfet Drive Side

• 

  Low side drive, NPN or N-Mos

• 

  High side drive PNP or P-Mos

• https://zhuanlan.zhihu.com/p/85664623

Documents

• Basic usage of Mosfet File:Ourdev 556744.pdf
• reference - https://www.vishay.com/docs/68214/turnonprocess.pdf