Call us: +86 0755-82563503

Currency: $ US Dollar

Items : %s%s

AC to DC Converter ICs

Compare Image Name Manufacturer Pricing(USD) Quantity Weight(Kg) Size(LxWxH) Datasheet Factory Lead Time Lifecycle Status Mount Packaging Published Series Pbfree Code Part Status Moisture Sensitivity Level (MSL) Number of Terminations Termination ECCN Code Max Operating Temperature Min Operating Temperature Operating Supply Voltage Length RoHS Status Lead Free Radiation Hardening Number of Pins Additional Feature Package / Case Max Supply Voltage REACH SVHC Reach Compliance Code Min Supply Voltage Frequency Height Width Resistance Mounting Type Weight Operating Temperature Technology Operating Supply Current Max Supply Current Height Seated (Max) HTS Code Number of Functions Nominal Supply Current Max Frequency Nominal Input Voltage Max Supply Voltage (AC) Power Rating Max Input Voltage JESD-609 Code Terminal Finish Terminal Position Terminal Form Peak Reflow Temperature (Cel) Supply Voltage Time@Peak Reflow Temperature-Max (s) Base Part Number Pin Count Temperature Grade Surface Mount Terminal Pitch JESD-30 Code Subcategory Qualification Status Max Power Dissipation Output Voltage Output Current-Max Number of Outputs Output Current Voltage - Output Output Power Max Output Power Max Output Current Input Voltage-Nom Analog IC - Other Type Halogen Free Voltage - Breakdown Current - Output Min Input Voltage Power Dissipation Min Breakdown Voltage Supplier Device Package Max Output Voltage Quiescent Current Rise Time Fall Time (Typ) Control Mode Input Voltage (Min) Input Voltage (Max) Power (Watts) Min Supply Voltage (AC) Fault Protection Min Input Voltage (AC) Max Input Voltage (AC) Control Technique Switcher Configuration Switching Frequency-Max Topology Max Duty Cycle Voltage - Supply (Vcc/Vdd) Control Features Frequency - Switching Internal Switch(s) Voltage - Start Up Duty Cycle Output Isolation Duty Cycle (Max)
FSDM0265RL FSDM0265RL ON Semiconductor 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download Tube FPS™ Obsolete 1 (Unlimited) 8-SMD, Gull Wing Surface Mount -25°C~85°C TA FSDM0265 650V 8-LSOP 27W Current Limiting, Over Load, Over Temperature, Over Voltage Flyback 8V~20V 67kHz Yes 12V 67% Isolated
INN3164C-H101-TL INN3164C-H101-TL Power Integrations 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 8 Weeks Tape & Reel (TR) InnoSwitch™3-CE Active 3 (168 Hours) EAR99 RoHS Compliant 24-PowerSMD Module (0.425, 10.80mm Width), 17 Leads Surface Mount -40°C~105°C TA 8542.39.00.01 15W NOT SPECIFIED NOT SPECIFIED SWITCHING CONTROLLER 650V Over Temperature, Over Voltage Flyback, Secondary Side SR 100kHz Yes Isolated
FSFR1800US FSFR1800US Rochester Electronics 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download Tube FSFR-US Obsolete 3 (168 Hours) ROHS3 Compliant 10-SSIP Module, 9 Leads, Formed Leads Through Hole -40°C~130°C TJ 500V 9-SIP 260W Current Limiting, Over Temperature, Over Voltage Half-Bridge 10V~25V Frequency Control Up to 300kHz Yes 12.5V 50% Isolated
MAX5052AEUA MAX5052AEUA Maxim Integrated 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download Tube 2004 no Obsolete 1 (Unlimited) 8 EAR99 3mm ROHS3 Compliant 8-TSSOP, 8-MSOP (0.118, 3.00mm Width) 3mm Surface Mount -40°C~150°C TJ BICMOS 1.1mm 8542.31.00.01 1 e0 Tin/Lead (Sn85Pb15) DUAL GULL WING 245 MAX5052 8 YES 0.65mm S-PDSO-G8 Switching Regulator or Controllers 0.1A 12V SWITCHING CONTROLLER 10.8V 24V Current Limiting, Over Temperature PULSE WIDTH MODULATION SINGLE Boost, Flyback, SEPIC 10.8V~24V EN 262kHz No 22V 50% Either
MC33364D2R2 MC33364D2R2 Rochester Electronics 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download Tape & Reel (TR) GreenLine™ yes Obsolete 1 (Unlimited) 8 4.9mm Non-RoHS Compliant 8-SOIC (0.154, 3.90mm Width) 3.9mm Surface Mount -25°C~125°C TA 1.75mm 1 e0 TIN LEAD DUAL GULL WING 240 30 8 YES 1.27mm R-PDSO-G8 COMMERCIAL 15.5V SWITCHING CONTROLLER 700V CURRENT-MODE 10V 20V Current Limiting, Over Temperature PULSE WIDTH MODULATION SINGLE Flyback 7.6V~16V 126kHz No 15V Isolated
KA5M0165RN KA5M0165RN Rochester Electronics 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download Tube FPS™ Obsolete 3 (168 Hours) ROHS3 Compliant 8-DIP (0.300, 7.62mm) Through Hole -25°C~85°C TA 650V 8-DIP Current Limiting, Over Load, Over Temperature, Over Voltage Flyback 8.8V~30V 67kHz Yes 15V 77%
FSQ0165RL FSQ0165RL ON Semiconductor 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download Surface Mount Tube FPS™ yes Obsolete 1 (Unlimited) 8 SMD/SMT 9.4mm RoHS Compliant No 8 8-SMD, Gull Wing No SVHC 55.6kHz 3.6mm 6.6mm 10Ohm Surface Mount 710mg -40°C~85°C TA 5mA 1 3mA 20V DUAL FSQ0165 2.54mm 1.5W 700V 1 900mA 13W 900mA 15V SWITCHING REGULATOR 0V 1.5W 650V 700V CURRENT-MODE 15W Current Limiting, Over Load, Over Temperature, Over Voltage PULSE WIDTH MODULATION Flyback 67 % 8V~20V Sync 55kHz~67kHz Yes 12V Isolated
TOP267KG-TL TOP267KG-TL Power Integrations 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 4 Weeks Tape & Reel (TR) 2012 TOPSwitch®-JX Active 3 (168 Hours) 10.16mm RoHS Compliant No 11 12-BESOP (0.350, 8.89mm Width), 11 Leads, Exposed Pad 8.89mm Surface Mount -40°C~150°C TJ CMOS 2.49mm 8542.39.00.01 1 45W e3 MATTE TIN 260 40 45W ANALOG CIRCUIT 725V 65W Current Limiting, Over Load, Over Temperature, Over Voltage, Short Circuit Flyback Frequency Control 66kHz 132kHz Yes 78% Isolated
FSGM0465RLDTU FSGM0465RLDTU Rochester Electronics 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download Tube FPS™ Obsolete 3 (168 Hours) ROHS3 Compliant TO-220-6 Full Pack, Formed Leads Through Hole -40°C~125°C TJ 650V TO-220F-6L (L-Forming) 70W Current Limiting, Over Load, Over Temperature, Over Voltage, Short Circuit Flyback 7.5V~26V 66kHz Yes 12V 70% Isolated
BM2P014 BM2P014 ROHM Semiconductor 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 19 Weeks Through Hole Tube 2001 Not For New Designs 1 (Unlimited) 7 EAR99 26V 9.2mm ROHS3 Compliant 8-DIP (0.300, 7.62mm), 7 Leads 7.62mm Through Hole -40°C~105°C TA 4.3mm 8542.39.00.01 1 DUAL NOT SPECIFIED NOT SPECIFIED 2.54mm R-PDIP-T7 Switching Regulator or Controllers Not Qualified 950μA 15V SWITCHING REGULATOR 650V CURRENT-MODE 8.9V Current Limiting, Over Voltage, Short Circuit PULSE WIDTH MODULATION Flyback 82 % 8.9V~26V 65kHz Yes 13.5V 75% Either
NCP1351APG NCP1351APG ON Semiconductor 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download OBSOLETE (Last Updated: 6 days ago) Through Hole Tube 2006 yes Obsolete 1 (Unlimited) 8 EAR99 RoHS Compliant Lead Free 8 8-DIP (0.300, 7.62mm) 7.62mm Through Hole -25°C~125°C TJ 20mA 4.45mm 1 e3 Tin (Sn) DUAL NCP1351 8 2.54mm Switching Regulator or Controllers 20V 1 400mA 12V SWITCHING CONTROLLER 90ns 100 ns CURRENT-MODE 9.5V Current Limiting, Over Load, Over Power, Short Circuit PULSE WIDTH MODULATION SINGLE 65kHz Flyback 50 % 8.9V~28V No 18V Isolated
ISL6842IBZ ISL6842IBZ Intersil (Renesas Electronics America) 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 11 Weeks Surface Mount 1999 Active 1 8 EAR99 105°C -40°C 18V 4.9mm RoHS Compliant Lead Free 8 SOIC 3.9mm 540.001716mg BICMOS 5.5mA 1 e3 Matte Tin (Sn) - annealed DUAL GULL WING 260 30 8 INDUSTRIAL Switching Regulator or Controllers Not Qualified 1 20.3V 15V SWITCHING CONTROLLER 1A 20ns CURRENT-MODE PULSE WIDTH MODULATION SINGLE Flyback 96 % 2MHz 96 %
LNK353PN LNK353PN Power Integrations 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download Tube 2004 LinkSwitch®-HF yes Last Time Buy 1 (Unlimited) 7 EAR99 9.575mm RoHS Compliant Lead Free No REQUIRES AN AC SUPPLY OF 85 TO 265V 8-DIP (0.300, 7.62mm), 7 Leads 7.62mm Through Hole -40°C~150°C TJ 8542.39.00.01 1 280μA 265V e3 Matte Tin (Sn) DUAL 8 NO 2.54mm R-PDIP-T7 4W 5.8V 0.4A SWITCHING REGULATOR 700V 4W 85V Current Limiting, Open Loop, Over Temperature, Short Circuit PULSE WIDTH MODULATION SINGLE Flyback 63 % 200kHz Yes Isolated
UCC2804DTR/81260 UCC2804DTR/81260 Texas Instruments 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download Tape & Reel (TR) Obsolete 1 (Unlimited) 8 EAR99 4.9mm ROHS3 Compliant 8-SOIC (0.154, 3.90mm Width) 3.9mm Surface Mount -40°C~85°C TA BICMOS 1 1MHz e4 NICKEL PALLADIUM GOLD DUAL GULL WING 260 UCC2804 8 YES R-PDSO-G8 1 1A 10V SWITCHING CONTROLLER 41ns 44 ns CURRENT-MODE 9V Current Limiting PULSE WIDTH MODULATION SINGLE Boost, Flyback, Forward 50 % 8.3V~12V Frequency Control Up to 1MHz No 12.5V 49%
PKS604FN PKS604FN Power Integrations 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download Tube 2006 PeakSwitch® Obsolete 1 (Unlimited) 7 EAR99 10.29mm RoHS Compliant Lead Free No TO-262-7 (Formed Leads), 6 Leads 8.4mm Through Hole -40°C~150°C TJ 4.17mm 8542.39.00.01 1 725μA 265V 35W ZIG-ZAG 3 NO 1.27mm R-PZFM-T7 56W 15V 1.55A SWITCHING CONTROLLER 700V 56W 85V Current Limiting, Over Load, Over Temperature PULSE WIDTH MODULATION SINGLE Flyback 65 % EN 277kHz Yes Isolated
UCC25701PWTR UCC25701PWTR Texas Instruments 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download Tape & Reel (TR) no Obsolete 2 (1 Year) 14 EAR99 5mm ROHS3 Compliant Contains Lead 14 14-TSSOP (0.173, 4.40mm Width) 700kHz 4.4mm Surface Mount -55°C~150°C TJ BICMOS 1 e4 Nickel/Palladium/Gold (Ni/Pd/Au) DUAL GULL WING 260 UCC25701 14 YES 0.65mm Switching Regulator or Controllers 400mV 1 100mA 11V SWITCHING CONTROLLER 20ns 20 ns VOLTAGE-MODE Current Limiting PULSE WIDTH MODULATION SINGLE Boost, Flyback, Forward 99 % 9V~15V Soft Start, Sync No 13V 99% Isolated
LNK6776E LNK6776E Power Integrations 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 4 Weeks Tube 2014 LinkSwitch™-HP Active 1 (Unlimited) 6 RoHS Compliant No 6 7-SIP, 6 Leads, Exposed Pad, Formed Leads No SVHC 2.01mm Through Hole -40°C~150°C TJ 1.6mA 8542.39.00.01 1 68W 265V ZIG-ZAG NO 1.27mm Switching Regulator or Controllers 88W 15μA 60W ANALOG CIRCUIT 725V 85V CURRENT-MODE Current Limiting, Over Load, Over Temperature, Over Voltage, Short Circuit 85V 265V Flyback 120kHz~136kHz Yes 64% Isolated
LNK354GN LNK354GN Power Integrations 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 11 Weeks Tube 2004 LinkSwitch®-HF yes Last Time Buy 1 (Unlimited) 7 EAR99 9.575mm RoHS Compliant Lead Free No 8 8-SMD (7 Leads), Gull Wing 6.35mm Surface Mount -40°C~150°C TJ 1 280μA 265V e3 Matte Tin (Sn) DUAL 8 YES 2.54mm R-PDSO-G7 5W 5.8V 0.4A SWITCHING REGULATOR 700V 5W 85V Current Limiting, Open Loop, Over Temperature, Short Circuit PULSE WIDTH MODULATION SINGLE Flyback 63 % 200kHz Yes Isolated
NCV1060BD100R2G NCV1060BD100R2G ON Semiconductor 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 4 Weeks ACTIVE (Last Updated: 3 days ago) Tape & Reel (TR) Automotive, AEC-Q100 yes Active 1 (Unlimited) 16 9.9mm RoHS Compliant 10-SOP (0.154, 3.90mm Width) 3.9mm Surface Mount -40°C~150°C TJ 1.75mm 1 1.7W e3 Tin (Sn) DUAL GULL WING NOT SPECIFIED 14V NOT SPECIFIED YES 1.27mm R-PDSO-G16 9V 0.52A SWITCHING CONTROLLER 670V CURRENT-MODE 7.2W Current Limiting, Over Load, Over Power, Over Voltage, Short Circuit PULSE WIDTH MODULATION BUCK-BOOST Boost, Buck, Flyback, Forward 8.4V~9.5V Soft Start 100kHz Yes Either
E-L6565N E-L6565N STMicroelectronics 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download Through Hole Tube Obsolete 1 (Unlimited) 8 EAR99 ROHS3 Compliant Lead Free 8 8-DIP (0.300, 7.62mm) 7.62mm Through Hole -40°C~150°C TJ 1 e3 Matte Tin (Sn) - annealed DUAL L6565 8 2.54mm 1W 0.7A 1 12V SWITCHING CONTROLLER 3.5mA 40ns 40 ns CURRENT-MODE Current Limiting RESONANT CONTROL SINGLE Flyback 10.3V~18V No 13.5V Isolated
TOP254YN TOP254YN Power Integrations 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 4 Weeks Tube 2005 TOPSwitch®-HX Active 1 (Unlimited) 6 Through Hole RoHS Compliant No 7 TO-220-7 (Formed Leads), 6 Leads 9V No SVHC -300mV 132kHz Through Hole -40°C~150°C TJ CMOS 1 e3 PURE MATTE TIN SINGLE NO R-XSFM-T6 Switching Regulator or Controllers 62W 700V 1 2.08A 62W 2.08A ANALOG CIRCUIT VOLTAGE-MODE Current Limiting, Over Temperature, Over Voltage 265V Flyback 78 % 66kHz 132kHz Yes Isolated
AP3917CS7-13 AP3917CS7-13 Diodes Incorporated 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 22 Weeks Tape & Reel (TR) Active 1 (Unlimited) RoHS Compliant 8-SOIC (0.154, 3.90mm Width), 7 Leads Surface Mount -40°C~125°C TA e3 Matte Tin (Sn) 650V 1W Current Limiting, Open Loop, Over Load, Over Temperature, Short Circuit Buck, Flyback 8.2V~8.8V Yes Non-Isolated
IW1810-00 IW1810-00 Dialog Semiconductor 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 20 Weeks Tape & Reel (TR) 2012 Active 1 (Unlimited) EAR99 RoHS Compliant 8-SOIC (0.154, 3.90mm Width), 7 Leads Surface Mount 150°C TJ 8542.39.00.01 270 10 SWITCHING CONTROLLER 800V 5W Current Limiting, Over Voltage, Short Circuit Flyback 16V EN, Soft Start 64kHz Yes 10.5V Isolated
NCV1075P100G NCV1075P100G ON Semiconductor 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 19 Weeks Tube Automotive, AEC-Q100 yes Active Not Applicable 8-DIP (0.300, 7.62mm), 7 Leads compliant Through Hole -40°C~125°C TJ NOT SPECIFIED NOT SPECIFIED SWITCHING CONTROLLER 670V 19W Current Limiting, Over Load, Over Voltage, Short Circuit Flyback 7.8V~8.6V EN, Frequency Control, Soft Start 100kHz Yes 8.2V 68% Non-Isolated
E-L6565D E-L6565D STMicroelectronics 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download Surface Mount Tube Obsolete 1 (Unlimited) 8 EAR99 4.9mm ROHS3 Compliant Lead Free 8 8-SOIC (0.154, 3.90mm Width) No SVHC 3.9mm Surface Mount -40°C~150°C TJ 1 12V DUAL GULL WING L6565 8 650mW 1 200mA 12V SWITCHING CONTROLLER 650mW 3.5mA 40ns 40 ns CURRENT-MODE Current Limiting RESONANT CONTROL SINGLE Flyback 10.3V~18V No 13.5V Isolated
NCV1076P130G NCV1076P130G ON Semiconductor 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 52 Weeks Tube Automotive, AEC-Q100 yes Active 1 (Unlimited) 8-DIP (0.300, 7.62mm), 7 Leads compliant Through Hole -40°C~125°C TJ NOT SPECIFIED NOT SPECIFIED SWITCHING CONTROLLER 670V 25W Current Limiting, Over Load, Over Voltage, Short Circuit Flyback 7.7V~8.5V EN, Frequency Control, Soft Start 130kHz Yes 8.1V 69% Isolated
TNY284DG-TL TNY284DG-TL Power Integrations 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 4 Weeks Surface Mount Tape & Reel (TR) 2015 TinySwitch®-4 Active 1 (Unlimited) 7 4.9mm RoHS Compliant No 7 SEATED_HT CALCULATED 8-SOIC (0.154, 3.90mm Width), 7 Leads 3.9mm Surface Mount -40°C~150°C TJ 8542.39.00.01 1 e3 Matte Tin (Sn) DUAL GULL WING 260 40 11W ANALOG CIRCUIT 725V 6W Current Limiting, Open Loop, Over Temperature, Over Voltage, Short Circuit Flyback EN 124kHz~140kHz Yes 67% Isolated
NCP1237AD65R2G NCP1237AD65R2G ON Semiconductor 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 4 Weeks ACTIVE (Last Updated: 2 days ago) Surface Mount Tape & Reel (TR) 2008 yes Active 1 (Unlimited) 7 EAR99 5mm ROHS3 Compliant Lead Free 7 8-SOIC (0.154, 3.90mm Width), 7 Leads 1.5mm 4mm Surface Mount -40°C~150°C TJ 30mA 1 70kHz e3 Tin (Sn) DUAL GULL WING NCP1237 7 Switching Regulator or Controllers 20V 1 1A 11V SWITCHING CONTROLLER Halogen Free 22ns 22 ns CURRENT-MODE 28V Current Limiting, Over Load, Over Temperature, Over Voltage, Short Circuit PULSE WIDTH MODULATION SINGLE Flyback 85 % 9.5V~28V 65kHz No 12V 80% Isolated
NCP1030DMR2G NCP1030DMR2G ON Semiconductor 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 17 Weeks ACTIVE (Last Updated: 2 days ago) Surface Mount Tape & Reel (TR) 2004 yes Active 1 (Unlimited) 8 EAR99 16V 3mm ROHS3 Compliant Lead Free No 8 8-TSSOP, 8-MSOP (0.118, 3.00mm Width) 800kHz Surface Mount -40°C~150°C TJ 4mA 1.1mm 1 3mA 16V e3 Tin (Sn) DUAL GULL WING 260 40 NCP1030 8 0.65mm Switching Regulator or Controllers 3W 8.6V 2 500mA 12V SWITCHING REGULATOR Halogen Free 200V 8V VOLTAGE-MODE Current Limiting, Over Temperature PULSE WIDTH MODULATION Boost, Flyback, Forward 80 % 7.6V~16V Frequency Control Up to 1MHz Yes 10.2V 75% Either
INN3676C-H602-TL INN3676C-H602-TL Power Integrations 0.0000
RFQ

Min: 1

Mult: 1

0.00000000 download 8 Weeks Tape & Reel (TR) 2017 InnoSwitch™3-EP Active 3 (168 Hours) 20 EAR99 10.8mm RoHS Compliant 24-PowerSMD Module (0.425, 10.80mm Width), 17 Leads 9.4mm Surface Mount -40°C~105°C TA 1.6mm 8542.39.00.01 1 36W DUAL GULL WING NOT SPECIFIED NOT SPECIFIED YES R-PDSO-G20 1.445A SWITCHING CONTROLLER 725V Current Limiting, Over Temperature, Over Voltage RESONANT CONTROL SINGLE Flyback, Secondary Side SR 100kHz Yes Isolated
Settings Need Help?
Top FAQ's

How can I quickly find answers to my questions?

Please visit the Help & Support area of our website to find information regarding ordering, shipping, delivery and more.

What is my Order Status?

Registered users can track orders from their account dropdown, or click here. *Order Status may take 12 hours to update after initial order is placed.

How do I return product?

Users can begin the returns process by starting with our Returns Page.

How do I find price and availability?

Quotes can be created by registered users in myLists.

How do I create a 'HK JDW' Account?

Visit the Registration Page and enter the required information. You will receive an email confirmation when your registration is complete.

United Kingdom/GBP Summary
Fast Shipping Fast Delivery

Orders are typically delivered to United Kingdom within 48 hours depending on location.

Free Shipping Free Shipping

Free delivery to United Kingdom on orders of £33 or more. A delivery charge of £12 will be billed on all orders less than £33.

Incoterms Incoterms

DDP (Duty and customs paid by HK JDW)

Payment Options Payment Types

Credit account for qualified institutions and businesses

Payment in Advance by Wire Transfer

Visa Mastercard American Express PayPal Apple Pay Google Pay

Marketplace Marketplace Product

More Products From Fully Authorized Partners

Average Time to Ship 1-3 Days, extra ship charges may apply. Please see product page, cart, and checkout for actual ship speed.

Incoterms: CPT (Duty, customs, and applicable VAT/Tax due at time of delivery)

For more information visit Help & Support