UC3845DTRG4
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Texas Instruments UC3845DTRG4

Manufacturer No:
UC3845DTRG4
Manufacturer:
Texas Instruments
Package:
Tape & Reel (TR)
Description:
IC REG CTRLR MULT TOP 14SOIC
Delivery:
Payment:
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Product Introduction

Overview

The UC3845DTRG4 is a current-mode PWM (Pulse Width Modulation) controller IC produced by Texas Instruments. This device is part of the UC3845 series and is designed for a wide range of power management applications, including off-line and DC-to-DC converters. It offers a high level of flexibility and ease of use, making it an ideal choice for various design scenarios. The UC3845DTRG4 is packaged in a 14-pin SOIC (Small Outline Integrated Circuit) package, which is suitable for surface-mount technology (SMT) and is compact enough for space-constrained designs.

Key Specifications

Parameter Value Unit
Package Type SOIC-14
Control Method Peak Current Mode
Frequency (Max) 500 kHz
Frequency (Min) 26 kHz
Duty Cycle (Max) 50%
Gate Drive (Typ) 1 A
Operating Temperature Range 0°C to 70°C
UVLO Thresholds On/Off 8.4V / 7.6V
Supply Voltage Range 8.4V to 30V
Topology Boost, Buck, Buck-Boost, Flyback, Forward

Key Features

  • PWM controller with internal oscillator and adjustable frequency up to 500 kHz
  • Wide input voltage range: -0.3V to 6.3V
  • High supply voltage range: 8.4V to 30V
  • Low start-up current (< 1mA)
  • Automatic feedforward compensation and pulse-by-pulse current limiting
  • Enhanced load-response characteristics and undervoltage lockout with hysteresis
  • Double-pulse suppression and high-current totem-pole output
  • Internally trimmed bandgap reference and error amplifier with low output resistance

Applications

  • Power supplies
  • Battery chargers
  • Motor control circuits
  • Industrial automation systems
  • Off-line and DC-to-DC converters

Q & A

  1. What is the UC3845DTRG4 used for?

    The UC3845DTRG4 is used in various power management applications, including power supplies, battery chargers, motor control circuits, and industrial automation systems.

  2. What is the maximum operating frequency of the UC3845DTRG4?

    The maximum operating frequency of the UC3845DTRG4 is up to 500 kHz.

  3. What is the operating temperature range of the UC3845DTRG4?

    The operating temperature range of the UC3845DTRG4 is from 0°C to 70°C.

  4. What are the UVLO thresholds for the UC3845DTRG4?

    The UVLO thresholds for the UC3845DTRG4 are 8.4V for turn-on and 7.6V for turn-off.

  5. What are the key features of the UC3845DTRG4's output stage?

    The output stage of the UC3845DTRG4 is a high-current totem-pole output designed to source or sink high-peak current, and it is optimized for driving N-channel MOSFETs.

  6. What types of topologies does the UC3845DTRG4 support?

    The UC3845DTRG4 supports various topologies including Boost, Buck, Buck-Boost, Flyback, and Forward.

  7. What is the typical gate drive current of the UC3845DTRG4?

    The typical gate drive current of the UC3845DTRG4 is 1 A.

  8. Does the UC3845DTRG4 have automatic feedforward compensation?

    Yes, the UC3845DTRG4 features automatic feedforward compensation.

  9. What is the package type of the UC3845DTRG4?

    The UC3845DTRG4 is packaged in a 14-pin SOIC (Small Outline Integrated Circuit) package.

  10. Is the UC3845DTRG4 suitable for surface-mount technology?

    Yes, the UC3845DTRG4 is suitable for surface-mount technology (SMT).

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):48%
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 UC3845DTRG4 UC3844DTRG4 UC3845ADTRG4 UC3845D8TRG4
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, Flyback, Forward Boost, Buck, Buck-Boost, Flyback, Forward
Number of Outputs 1 1 1 1
Output Phases 1 1 1 1
Voltage - Supply (Vcc/Vdd) 12V ~ 28V 12V ~ 28V 7.6V ~ 30V 12V ~ 28V
Frequency - Switching Up to 500kHz Up to 500kHz Up to 500kHz Up to 500kHz
Duty Cycle (Max) 48% 48% 48% 48%
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) 8-SOIC (0.154", 3.90mm Width)
Supplier Device Package 14-SOIC 14-SOIC 14-SOIC 8-SOIC

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