UC3842 - SMD/SMT Current Mode PWM Controller SMD-8 (SOIC-8) - LM3842 / TL3842

UC3842 SMD/SMT Current Mode PWM Controller - SOIC-8 (LM3842/TL3842 Compatible)

The UC3842 is a current-mode PWM controller. It is compatible with LM3842 and TL3842 devices. This integrated circuit is supplied in an SMD-8 (SOIC-8) surface-mount package. It provides duty cycle control for switch-mode power supplies (SMPS). The UC3842 incorporates protection mechanisms, including Under-Voltage Lockout. Its low start-up current contributes to system efficiency. This controller is suitable for flyback and forward converter designs. It offers precise control for power conversion.

Specifications:

• Function: Current Mode PWM Controller
• Package: SMD-8 / SOIC-8
• Operating Voltage (VCC): 16V to 30V
• UVLO Thresholds: Turn-on: ~16V, Turn-off: ~10V
• Oscillator Frequency: Up to 500 kHz (typical use at 100 kHz)
• Reference Voltage: 5V ±1%
• Output Drive Capability: ±1A peak
• Start-Up Current: < 1 mA
• Operating Supply Current: ~11 mA
• RoHS Compliant: Yes

Key features and benefits:

• Current-Mode Control for line/load regulation and cycle-by-cycle current limiting.
• Fixed Frequency Oscillator, typically 100 kHz.
• Low Start-Up Current (<1mA).
• Under-Voltage Lockout (UVLO) with Turn-on: ~16V, Turn-off: ~10V.
• SMD-8 (SOIC-8) surface-mount package.
• Integrates analog control circuitry.
• Provides precise duty cycle control.

Applications:

• Off-line Switch-Mode Power Supplies (SMPS), including flyback and forward converters.
• LED drivers and battery chargers.
• DC-DC converters.
• Standby power supplies.
• Industrial and consumer power modules.

Frequently Asked Questions:

Q: Is the UC3842 compatible with LM3842 or TL3842?
A: Yes, the UC3842 is compatible with LM3842 and TL3842 current-mode PWM controllers.

Q: What package type is the UC3842 supplied in?
A: The UC3842 is supplied in an SMD-8 (SOIC-8) surface-mount package.

Q: What is the typical operating voltage range for the UC3842?
A: The operating voltage (VCC) range for the UC3842 is 16V to 30V.

Q: What are the Under-Voltage Lockout (UVLO) thresholds?
A: The UVLO turn-on threshold is approximately 16V, and the turn-off threshold is approximately 10V.

Q: What is the maximum oscillator frequency?
A: The oscillator frequency can operate up to 500 kHz, with typical use at 100 kHz.

Package Includes:

*Image shown is a representation only.

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