UC3843D8G4
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Texas Instruments UC3843D8G4

Manufacturer No:
UC3843D8G4
Manufacturer:
Texas Instruments
Package:
Tube
Description:
IC REG CTRLR MULT TOPOLOGY 8SOIC
Delivery:
Payment:
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Product Introduction

Overview

The UC3843D8G4 is a current-mode PWM (Pulse Width Modulation) controller integrated circuit produced by Texas Instruments. This device is part of the UCx84x series, which is widely used in power supply and DC-DC converter applications. The UC3843D8G4 is specifically designed for operation in a temperature range of 0°C to 70°C, making it suitable for a variety of industrial and consumer electronics.

Key Specifications

ParameterValueUnit
Package Type8-SOIC-
Input Voltage12 - 25V
Output VoltageUp to 13.5V
Output Current200 mA-
Oscillator Frequency100 - 500 kHz-
Operating Temperature0 - 70°C
UVLO (UnderVoltage LockOut)7.8 - 9 V-
Duty Cycle Range0% - 100%-
Supply Current11 - 17 mA-
Junction Temperature-65 to 150°C

Key Features

  • Current-mode PWM control for high performance and stability in power supply applications.
  • Operating frequency range of 100 kHz to 500 kHz, allowing for flexibility in design.
  • UnderVoltage LockOut (UVLO) with thresholds between 7.8V and 9V to ensure safe startup and operation.
  • Maximum duty cycle of 100% for versatile application needs.
  • Low standby current and high efficiency.
  • RoHS compliant, ensuring environmental sustainability.

Applications

The UC3843D8G4 is widely used in various power supply and DC-DC converter applications, including:

  • Switch-mode power supplies.
  • DC-DC converters.
  • High-frequency power conversion systems.
  • Industrial power supplies.
  • Consumer electronics power management.

Q & A

  1. What is the operating temperature range of the UC3843D8G4? The UC3843D8G4 operates in a temperature range of 0°C to 70°C.
  2. What is the input voltage range for the UC3843D8G4? The input voltage range is from 12V to 25V.
  3. What is the maximum output current of the UC3843D8G4? The maximum output current is 200 mA.
  4. What is the oscillator frequency range of the UC3843D8G4? The oscillator frequency range is from 100 kHz to 500 kHz.
  5. Is the UC3843D8G4 RoHS compliant? Yes, the UC3843D8G4 is RoHS compliant.
  6. What is the duty cycle range of the UC3843D8G4? The duty cycle range is from 0% to 100%.
  7. What is the UVLO threshold for the UC3843D8G4? The UVLO threshold is between 7.8V and 9V.
  8. What is the package type of the UC3843D8G4? The package type is 8-SOIC.
  9. What are some common applications of the UC3843D8G4? Common applications include switch-mode power supplies, DC-DC converters, and high-frequency power conversion systems.
  10. What is the junction temperature range for the UC3843D8G4? The junction temperature range is from -65°C to 150°C.

Product Attributes

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:Surface Mount
Package / Case:8-SOIC (0.154", 3.90mm Width)
Supplier Device Package:8-SOIC
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Similar Products

Part Number UC3843D8G4 UC3843DG4 UC3845D8G4 UC3843AD8G4
Manufacturer Texas Instruments Texas Instruments Texas Instruments Texas Instruments
Product Status Discontinued at Digi-Key Discontinued at Digi-Key Discontinued at Digi-Key Discontinued at Digi-Key
Output Type Transistor Driver Transistor Driver Transistor Driver Transistor Driver
Function Step-Up, Step-Down, Step-Up/Step-Down Step-Up, Step-Down, Step-Up/Step-Down Step-Up, Step-Down, Step-Up/Step-Down Step-Up, Step-Down, Step-Up/Step-Down
Output Configuration Positive, Isolation Capable Positive, Isolation Capable Positive, Isolation Capable Positive, Isolation Capable
Topology Boost, Buck, Buck-Boost, Flyback, Forward Boost, Buck, Buck-Boost, Flyback, Forward Boost, Buck, Buck-Boost, Flyback, Forward Boost, Buck, Flyback, Forward
Number of Outputs 1 1 1 1
Output Phases 1 1 1 1
Voltage - Supply (Vcc/Vdd) 12V ~ 28V 12V ~ 28V 12V ~ 28V 7.6V ~ 30V
Frequency - Switching Up to 500kHz Up to 500kHz Up to 500kHz Up to 500kHz
Duty Cycle (Max) 97% 97% 48% 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 8-SOIC (0.154", 3.90mm Width) 14-SOIC (0.154", 3.90mm Width) 8-SOIC (0.154", 3.90mm Width) 8-SOIC (0.154", 3.90mm Width)
Supplier Device Package 8-SOIC 14-SOIC 8-SOIC 8-SOIC

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