UC3842ADR2
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onsemi UC3842ADR2

Manufacturer No:
UC3842ADR2
Manufacturer:
onsemi
Package:
Tape & Reel (TR)
Description:
IC REG CTRLR FLYBK ISO CM 14SOIC
Delivery:
Payment:
iso14001
iso45001
iso9001
iso13485

Product Introduction

Overview

The UC3842ADR2 from onsemi is a high-performance fixed frequency current mode controller, specifically designed for off-line and DC-DC converter applications. It offers a cost-effective solution with minimal external components, making it an ideal choice for designers seeking efficient and reliable power management solutions.

Key Specifications

CharacteristicSymbolMinTypMaxUnit
Reference Output VoltageVref4.955.05.05V
Line Regulation (VCC = 12 V to 25 V)Regline-2.0-20mV
Load Regulation (IO = 1.0 mA to 20 mA)Regload-3.0-25mV
Temperature StabilityTS-0.2--mV/°C
Oscillator Frequency (TJ = 25°C)fosc475052kHz
Output Current, Source or SinkIO--1.0A
Operating Junction TemperatureTJ--150°C
Operating Ambient TemperatureTA0-70°C

Key Features

  • Trimmed Oscillator Discharge Current for Precise Duty Cycle Control: Ensures accurate and stable oscillator frequency.
  • Current Mode Operation to 500 kHz: Supports high-frequency applications.
  • Automatic Feed Forward Compensation: Enhances stability and performance of the power supply.
  • Latching PWM for Cycle-By-Cycle Current Limiting: Provides robust current limiting and protection.
  • Internally Trimmed Reference with Undervoltage Lockout: Offers reliable voltage reference and protection against undervoltage conditions.
  • High Current Totem Pole Output: Capable of sourcing and sinking high currents, ideal for driving power MOSFETs.
  • Undervoltage Lockout with Hysteresis: Prevents the device from operating under low voltage conditions.
  • Low Startup and Operating Current: Minimizes power consumption.
  • Direct Interface with ON Semiconductor SENSEFET™ Products: Compatible with SENSEFET™ devices for enhanced performance.
  • Pb-Free Packages Available: Environmentally friendly packaging options.

Applications

The UC3842ADR2 is designed for use in off-line and DC-DC converter applications. It is particularly suited for:

  • Switch-mode power supplies
  • DC-DC converters
  • Power factor correction circuits
  • High-frequency power conversion systems

Q & A

  1. What is the primary function of the UC3842ADR2?
    The UC3842ADR2 is a high-performance fixed frequency current mode controller designed for off-line and DC-DC converter applications.
  2. What is the maximum oscillator frequency supported by the UC3842ADR2?
    The UC3842ADR2 can operate up to 500 kHz.
  3. What type of output does the UC3842ADR2 have?
    The UC3842ADR2 has a high current totem pole output.
  4. What is the purpose of the undervoltage lockout feature?
    The undervoltage lockout feature prevents the device from operating under low voltage conditions, ensuring reliable operation.
  5. What is the operating junction temperature range for the UC3842ADR2?
    The operating junction temperature range is from 0°C to 150°C.
  6. Can the UC3842ADR2 be used in high-frequency applications?
    Yes, it supports current mode operation up to 500 kHz.
  7. What type of packages are available for the UC3842ADR2?
    The device is available in 8-pin dual-in-line and 14-pin surface mount (SOIC-14) packages.
  8. Does the UC3842ADR2 have built-in current limiting features?
    Yes, it includes cycle-by-cycle current limiting and a latch for single pulse metering.
  9. Is the UC3842ADR2 compatible with SENSEFET™ products?
    Yes, it has a direct interface with ON Semiconductor SENSEFET™ products.
  10. What is the maximum output current of the UC3842ADR2?
    The maximum output current is 1.0 A.

Product Attributes

Output Type:Transistor Driver
Function:Step-Up, Step-Up/Step-Down
Output Configuration:Positive, Isolation Capable
Topology:Boost, Flyback
Number of Outputs:1
Output Phases:1
Voltage - Supply (Vcc/Vdd):10V ~ 30V
Frequency - Switching:Up to 500kHz
Duty Cycle (Max):96%
Synchronous Rectifier:No
Clock Sync:No
Serial Interfaces:- 
Control Features:Frequency Control
Operating Temperature:0°C ~ 70°C (TA)
Mounting Type:Surface Mount
Package / Case:14-SOIC (0.154", 3.90mm Width)
Supplier Device Package:14-SOIC
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Similar Products

Part Number UC3842ADR2 UC3843ADR2 UC3842ADR2G UC3842BDR2
Manufacturer onsemi onsemi onsemi onsemi
Product Status Obsolete Obsolete Obsolete Obsolete
Output Type Transistor Driver Transistor Driver Transistor Driver Transistor Driver
Function Step-Up, Step-Up/Step-Down Step-Up, Step-Up/Step-Down Step-Up, Step-Up/Step-Down Step-Up, Step-Up/Step-Down
Output Configuration Positive, Isolation Capable Positive, Isolation Capable Positive, Isolation Capable Positive, Isolation Capable
Topology Boost, Flyback Boost, Flyback Boost, Flyback Boost, Flyback
Number of Outputs 1 1 1 1
Output Phases 1 1 1 1
Voltage - Supply (Vcc/Vdd) 10V ~ 30V 7.6V ~ 30V 10V ~ 30V 10V ~ 30V
Frequency - Switching Up to 500kHz Up to 500kHz Up to 500kHz Up to 500kHz
Duty Cycle (Max) 96% 96% 96% 96%
Synchronous Rectifier No No No No
Clock Sync No No No No
Serial Interfaces - - - -
Control Features Frequency Control Frequency Control Frequency Control Frequency Control
Operating Temperature 0°C ~ 70°C (TA) 0°C ~ 70°C (TA) 0°C ~ 70°C (TA) 0°C ~ 70°C (TA)
Mounting Type Surface Mount Surface Mount Surface Mount Surface Mount
Package / Case 14-SOIC (0.154", 3.90mm Width) 14-SOIC (0.154", 3.90mm Width) 14-SOIC (0.154", 3.90mm Width) 14-SOIC (0.154", 3.90mm Width)
Supplier Device Package 14-SOIC 14-SOIC 14-SOIC 14-SOIC

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