• UC1844J CDIP-8
UC1844J CDIP-8

UC1844J

Current Mode PWM Controller 200mA 500kHz 8-Pin CDIP Tube

Inventory:4,254

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Overview of UC1844J

The UC1844J is a Current Mode PWM Controller optimized for high-efficiency DC/DC conversion, rapid start-up and shutdown, and low ripple output voltage. It provides excellent performance for analog and digital signal switching applications.

Pinout

The UC1844J pinout refers to the configuration and function of each pin in its CDIP-8 package. This package typically includes a diagram showing the layout of the pins when viewed from the top down with pins named sequentially. Each pin on the UC1844J has a specific role such as power supply input, ground connection, or signal interface. The pinout details are crucial for integrating this component into a circuit as they ensure correct connections for optimal device performance. Designers and engineers must refer to the datasheet provided by the manufacturer to get accurate information regarding each pin's function and electrical characteristics.

Features

  • Error amplifier with high bandwidth: Provides fast and accurate control of the output voltage.
  • Dual-channel operation capability: Enables simultaneous operation of two channels for increased efficiency and reliability.
  • Rapid overcurrent protection response: Quickly responds to overcurrent conditions to prevent damage to the device or connected components.
  • High-precision output voltage regulation: Maintains a stable output voltage with minimal ripple and noise.
  • Error amplifier feedback control: Allows for precise control of the output voltage by monitoring its value and adjusting it as needed.
  • Rapid start-up and shutdown: Enables efficient power management by quickly turning the device on or off.
  • Overcurrent limiting for safety: Prevents damage to the device or connected components by limiting the current flow during overcurrent conditions.
  • Error amplifier feedback control: Allows for precise control of the output voltage by monitoring its value and adjusting it as needed.
  • Pulse-by-pulse current limiting for reliability: Prevents damage to the device or connected components by limiting the current flow during overcurrent conditions.
  • Fault-tolerant design for improved reliability: Enables continued operation even in the event of a fault or failure.
  • Pulse-width modulation control flexibility: Allows for precise control of the output voltage and current.
  • Error amplifier with low noise floor: Minimizes noise and ripple on the output voltage.
  • Safe operating temperature range: Ensures reliable operation within a specified temperature range.
  • Pulse-by-pulse current regulation: Prevents damage to the device or connected components by regulating the current flow during overcurrent conditions.
  • Differential input stage isolation: Prevents interference between the input stages and ensures accurate control of the output voltage.
  • Soft-start feature for reduced in-rush current: Gradually turns on the device to prevent inrush currents that can cause voltage drops or spikes.
  • Safe operating frequency range: Ensures reliable operation within a specified frequency range.

Applications

  • DC/DC converters for power supplies and battery charging systems: The UC1844J is suitable for use in DC/DC converters that require high-efficiency, rapid start-up, and shutdown, as well as low ripple output voltage.

Advantages and Disadvantages

Advantages

  • High efficiency DC/DC conversion: The UC1844J enables high-efficiency DC/DC conversion, reducing heat generation and increasing system reliability.
  • Rapid start-up and shutdown: The device's rapid start-up and shutdown capabilities enable efficient power management and reduce the risk of component damage or failure.
  • Low ripple output voltage: The UC1844J maintains a stable output voltage with minimal ripple and noise, ensuring reliable operation in a variety of applications.

Disadvantages

  • Complexity of design and implementation: The UC1844J's advanced features require careful design and implementation to ensure optimal performance and reliability.

Equivalents

  • Other current-mode PWM controllers from Texas Instruments: The UC1844J is part of a family of current-mode PWM controllers offered by Texas Instruments, each with its own unique features and applications.

Frequently Asked Questions

Q: What is the maximum operating frequency of the UC1844J?
A: The maximum operating frequency of the UC1844J is 500 kHz.

Q: How does the UC1844J handle overcurrent conditions?
A: The UC1844J features rapid overcurrent protection response, which quickly responds to overcurrent conditions to prevent damage to the device or connected components.

Q: What is the recommended operating temperature range for the UC1844J?
A: The recommended operating temperature range for the UC1844J is -40°C to 150°C.

Q: Can the UC1844J be used in DC/DC converters that require high-efficiency and low ripple output voltage?
A: Yes, the UC1844J is suitable for use in DC/DC converters that require high-efficiency, rapid start-up, and shutdown, as well as low ripple output voltage.

Specifications

The followings are basic parameters of the part selected concerning the characteristics of the part and categories it belongs to.

Source Content uid UC1844J Pbfree Code Yes
Rohs Code No Part Life Cycle Code Active
Ihs Manufacturer TEXAS INSTRUMENTS INC Part Package Code DIP
Package Description DIP, DIP8,.3 Pin Count 8
Reach Compliance Code not_compliant ECCN Code EAR99
HTS Code 8542.39.00.01 Samacsys Manufacturer Texas Instruments
Analog IC - Other Type SWITCHING CONTROLLER Control Mode CURRENT-MODE
Control Technique PULSE WIDTH MODULATION Input Voltage-Max 30 V
Input Voltage-Min 11 V Input Voltage-Nom 15 V
JESD-30 Code R-GDIP-T8 JESD-609 Code e0
Length 9.58 mm Number of Functions 1
Number of Terminals 8 Operating Temperature-Max 125 °C
Operating Temperature-Min -55 °C Output Current-Max 1 A
Output Voltage-Nom 5 V Package Body Material CERAMIC, GLASS-SEALED
Package Code DIP Package Equivalence Code DIP8,.3
Package Shape RECTANGULAR Package Style IN-LINE
Peak Reflow Temperature (Cel) NOT SPECIFIED Qualification Status Not Qualified
Seated Height-Max 5.08 mm Supply Current-Max (Isup) 25 mA
Supply Voltage-Max (Vsup) 30 V Supply Voltage-Min (Vsup) 12 V
Surface Mount NO Switcher Configuration BUCK-BOOST
Switching Frequency-Max 500 kHz Technology BICMOS
Temperature Grade MILITARY Terminal Finish Tin/Lead (Sn/Pb)
Terminal Form THROUGH-HOLE Terminal Pitch 2.54 mm
Terminal Position DUAL Time@Peak Reflow Temperature-Max (s) NOT SPECIFIED
Width 7.62 mm

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UC1844J

Current Mode PWM Controller 200mA 500kHz 8-Pin CDIP Tube

Inventory:

4,254