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UC3842N +BOM

Power Supply Controller PWM Controller 8-PDIP

UC3842N Information

Description

The UC3842N is a Switched-Mode Power Supply Controller from STMicroelectronics, designed for current-mode type power supplies. It features pulse width modulation (PWM) control, voltage mode control, and adjustable frequency up to 1 MHz. This controller has various protection mechanisms, including soft start, under-voltage lockout, over-voltage protection, and error amplifier for closed-loop control. The UC3842N is suitable for a range of applications, including switch-mode power supplies (SMPS), battery chargers, and LED drivers. It regulates voltage and controls the duty cycle of a power converter, making it suitable for various low to medium power applications in electronics. With its low start-up current and internal oscillator with externally adjustable frequency, this controller provides reliable performance and flexibility in design.

Features

According to the product information, the features of the UC3842N are:

  • Pulse width modulation (PWM) control
  • Voltage mode control
  • Adjustable frequency up to 1 MHz
  • Current sense input
  • Soft start function
  • Under voltage lockout
  • Over voltage protection
  • Error amplifier for closed-loop control
  • Low start-up current
  • Internal oscillator with externally adjustable frequency

These features make the UC3842N suitable for various power supply applications, such as switch-mode power supplies (SMPS), battery chargers, and LED drivers.

Package

The package type of UC3842N is DIP-8 (Dual In-Line Package, 8 pins).

Pinout

The UC3842N has a pin count of 8 (DIP-8). The pin functions are: 1. VCC: Positive supply voltage 2. GND: Ground 3. COMP: Error amplifier output 4. CS: Current sense input 5. RST: Soft-start reset input 6. UVLO: Under-voltage lockout input 7. OVLO: Over-voltage lockout input 8. OUT: PWM output This information is based on the product description and specifications provided earlier.

Manufacturer

The manufacturer of the UC3842N is STMicroelectronics, a leading global semiconductor company that designs, develops, manufactures, and markets a wide range of semiconductor products.

Applications

The application areas of the UC3842N are:

  • Switch-mode power supplies (SMPS)
  • Battery chargers
  • LED drivers

Specifications

Category Integrated Circuits (ICs)Power Management (PMIC)DC DC Switching Controllers Output Type Transistor Driver
Function Step-Up, Step-Down, Step-Up/Step-Down Output Configuration Positive, Isolation Capable
Topology Boost, Buck, Buck-Boost, Flyback, Forward Number of Outputs 1
Output Phases 1 Voltage - Supply (Vcc/Vdd) 12V ~ 28V
Frequency - Switching Up to 500kHz Duty Cycle (Max) 97%
Synchronous Rectifier No Clock Sync No
Serial Interfaces - Control Features Frequency Control
Operating Temperature 0°C ~ 70°C (TA) Mounting Type Through Hole
Base Product Number UC3842 Package/Case DIP8

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Ratings and Reviews

More
J
J**b 11/30/2022

Arrived today much earlier than expected, already assembled, great

19
J
J**h 02/19/2021

Order received. Delivery to the krasnodar territory of eight days. The board is working, without problems, as there are others to solder capacitors and remove the sockets. Load holds.

2
T
T**l 08/01/2020

Effort and Execution

13

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