Buy(0)
Inquiry(0)
Dear customers, due to the implementation of the GDPR policy in Europe, UTSOURCE has also made adjustment accordingly to meet the policy requirements. Please read the new privacy policy carefully and this window will no longer pop up after you accept it.
Delivery Address
+ Add Address
The new shipping address
* Please fill in the cell phone number correctly to make sure that you can receive the tracking info in time.
Country Code
Favorite
Utsource certified used parts
Utsource certified used parts provide the following guarantees:
1. Utsource will inspect the goods, including appearance inspection (no serious damage to the appearance), select qualified and honest suppliers, and ensure 98% qualification rate.
2. Some parts are tested by machine.
3. Utsource certified parts can be returned and refunded unconditionally within 60 days.
Description
The UC3842AN is a Current Mode PWM Controller optimized for off-line and DC to DC converters. Providing the necessary features to control current mode switched mode power supplies, this controller has the following improved features. Start up current is guaranteed to be less than 0.5mA. Oscillator discharge is trimmed to 8.3mA. During under-voltage lockout, the output stage can sink at least 10mA at less than 1.2V for VCC over 5V.
Title
Current Mode PWM, 25V-12V supply, 500 kHz, 5V/1A out, DIP-8
All product names, trademarks, brands and logos used on this site are the property of their respective owners. The depiction, description or sale of products featuring these names, trademarks, brands and logos is for identification purposes only and is not intended to indicate any affiliation with or authorization by any rights holder.
Introduction:
The UC3842AN family of control ICs provides the necessary features to implement off-line or DC to DC fixed frequency current mode control schemes with minimal external parts count. Internally implemented circuits include a trimmed oscillator for precise DUTY CYCLE CONTROL under-voltage lockout featuring a start-up current less than 0.5mA, a precision reference trimmed for accuracy. The output stage, suitable for driving N-Channel MOS- FETs, is low in the off-state.
Some Core Parameters:
SPECIAL FEATURES :
● Rimmed oscillator discharge current
● Latching PWM for cycle-by-cycle current limiting
● Internally trimmed reference with undervoltage lockout
● High current totem pole output under voltages lockout with hysteresis
How it Uses in the work:
Internal Block Diagram:
UC3842AN Pinout Connections:
UC3842AN Pin Functions:
● 1 pin (COMP) This pin is the Error Amplifier output and is made available for loop compensation.
● 2 pin (VFB) This is the inverting input of the Error Amplifier Circuit. It is normally connected to the switching supply power output through a resistor divider.
● 3 pin (ISENSE) A voltage proportional to inductor current is connected to this input. The PWM uses this information to terminate the output switching conduction.
● 4 pin (RT/CT) The oscillator frequency and maximum Output duty cycle are programmed by connecting resistor RT to Vref and capacitor CT to ground. The operation of 500kHz is possible.
● 5 pin (GND) This pin is the combined control circuitry and power ground.
● 6 pin (out) This output directly drives the gate of a power MOSFET. Peak currents up to 1Amper are sourced and sunk by this pin.
● 7 pin (VCC) pin This pin is the positive supply of the control IC.
● 8 pin (Vref) This is the reference output. It provides charging current for capacitor CT through resisted RT.
Preview of the first 3 pages of the data sheet
Document Preview
Some Part number from the same manufacture
Same catergory
241 buyer reviews from United Kingdom
Jamie
Length of registration:3 years
All working fine, great quality! Fast shipment and great price! Totally recommended!
0
0
Reply0
12/07/2022
FOUNDRY ARIENTE SA
Length of registration:15 years
Thank you very much to the seller all delivered on time and the goods correspond to the description. Measured some, and are within the standard.
0
0
Reply0
11/11/2022
Paul
Length of registration:13 years
The things I bought are very satisfactory and practical
0
0
Reply0
10/17/2022
phil simmons
Length of registration:9 years
nice components
0
0
Reply0
10/17/2017
John Connolly
Length of registration:9 years
High quality components and excellent fast service.
2
0
Reply0
01/09/2017
Lance Welsh
Length of registration:11 years
Excellent service
0
0
Reply0
12/29/2016
Neil Walkley
Length of registration:8 years
Received in good condition
0
0
Reply0
11/30/2016
C.B.Ashmore
Length of registration:7 years
Excellent service, may thanks
0
0
Reply0
11/24/2016
Gary Beddows
Length of registration:7 years
Fantastic
1
0
Reply0
09/19/2016
Robert
Length of registration:7 years
Excellent really pleased i have now repaired my Pioneer av receiver. Many Thanks You guys. Don,t listen to the lies on the net. great service and people. Robert
1
0
Reply0
09/13/2016
European payment method
Asia payment method
America payment method
International payment method
Latest shipping video More
Order
Payment
Shipping
Gift Coupon/Plus service
Returning
Returns are normally accepted when completed within 60 days from the date of the parcel delivered.
Defective ( Please provide a third party quality report of nonconforming products)
Return Freight charges must be prepaid; we will not accept COD shipments.
Warranty
All UTSOURCE purchases have a 60 days money back return policy, plus a 90 days UTSOURCE warranty against any manufacturing defects.This warranty shall not apply to any item where defects have been caused by improper customer assembly, failure by customer to follow instructions, product modification, negligent or improper operation.
UC3842AN
UC3842AN has several brands around the world that may have alternate names for UC3842AN due to regional differences or acquisition. UC3842AN may also be known as the following names:
BUYING OPTIONS
Stock Status: 10000
Minimum: 3
Total Price:
Unit Price:0.67556
UTSOURCE
Country:
United States
Express:(FEDEX, UPS, DHL, TNT)Free shipping on first 0.5kg for orders over £157.09,Overweight will be charged separately
JudyCustomer Manager
sales@utsource.com
(888) 766 5577
+86 15302769052
+1 (312)899-4831
(whatsapp only)
Your dedicated customer service, providing you the best service at any time.
13 sellers Choices
Stop production experts, we can provide a large number of electronic components that have been stopped production and are difficult to find, to facilitate the maintenance company
Reply to
submit