UC3842 -Current Mode PWM Controller - LM3842 / TL3842

UC3842 Current Mode PWM Controller IC (LM3842/TL3842 Compatible)

The UC3842 is a fixed frequency current-mode PWM controller IC. It supports Off-Line and DC-to-DC converter applications. This integrated circuit reduces external component count. It incorporates a precisely trimmed oscillator for duty cycle control. A temperature-compensated reference and a high-gain error amplifier are included. Current sensing comparator operation is integrated. Its high-current totem pole output drives Power MOSFETs. This IC is compatible with LM3842 and TL3842 controllers.

Specifications:

• Controller Type: Current Mode PWM
• Frequency: Fixed
• Output Type: High-current Totem Pole
• Oscillator: Precisely Trimmed
• Reference: Temperature-Compensated
• Error Amplifier: High-Gain
• Sensing: Current Sensing Comparator
• Compatibility: LM3842 / TL3842
• External Components: Minimized

Key features and benefits:

• Fixed frequency current-mode PWM controller
• Reduced external component count
• Precisely trimmed oscillator for duty cycle control
• Temperature-compensated reference
• High-gain error amplifier
• Current sensing comparator
• High-current totem pole output for Power MOSFET driving

Applications:

• Off-Line converter applications
• DC-to-DC converter applications
• Switch-mode power supplies (SMPS)
• Power management solutions
• Battery chargers

Frequently Asked Questions:

Q: Is the UC3842 a direct functional equivalent to the LM3842 and TL3842?
A: Yes, the UC3842 functions as a direct equivalent to the LM3842 and TL3842, offering similar performance characteristics.

Q: What type of output stage does the UC3842 feature for driving MOSFETs?
A: The UC3842 incorporates a high-current totem pole output stage, suitable for driving Power MOSFETs.

Q: Does this controller require many external components for operation?
A: No, the UC3842 is designed to minimize external component count, simplifying power supply designs.

Package Includes:

*Image shown is a representation only.

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