UC3845 Current-Mode PWM Controller IC (Switch-Mode Power Supply)

40.00 -43% 70.00

UC3845 Current-Mode PWM Controller IC (Switch-Mode Power Supply) is an integrated circuit essential for designing and controlling high-frequency switching power supplies, utilizing reliable current-mode operation for superior stability.

AVAILABILITY: AVAILABLE
SKU: 364

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Description

Overview: The Standard IC for Current-Mode Power Control. The UC3845 Current-Mode PWM Controller IC is a cornerstone component in power electronics, specifically optimized for off-line and isolated power supply topologies (like Flyback converters). This chip is ABSOLUTELY ESSENTIAL because it integrates all the necessary functions—including an error amplifier, a high-speed comparator, and a precise oscillator—to implement CURRENT-MODE CONTROL. This control method provides superior line regulation and easier loop compensation, making it a TRUSTED SOLUTION for building efficient and highly regulated power supplies.

Description Summary. The UC3845 Current-Mode PWM Controller IC (Switch-Mode Power Supply) is an integrated circuit essential for designing and controlling high-frequency switching power supplies, utilizing reliable current-mode operation for superior stability.

Key Technical Specifications (Datasheet Snapshot). - COMPONENT TYPE: Fixed-Frequency Current-Mode PWM Controller.

KEY FEATURE: Operates in CURRENT-MODE CONTROL, offering superior transient response and line regulation.
OPERATING VOLTAGE: Wide input voltage range (typically 10V to 30V).
OUTPUT STAGE: Single Output (Totem-Pole) designed to drive an external MOSFET.
OUTPUT CURRENT: High output current drive (typically 1 AMPERE peak) for fast MOSFET switching.
PROTECTION: Includes UNDERVOLTAGE LOCKOUT (UVLO) and a precise $2.5\text{V}$ reference.
DUTY CYCLE: Max duty cycle up to $100\text{ percent}$ (A key difference from UC3843, which is limited to 50%).
PACKAGE: DIP-8 (Standard Dual In-line Package).

Applications: Switch-Mode Power Supplies (SMPS). This IC is expertly suited for: Designing high-efficiency FLYBACK CONVERTERS, creating OFF-LINE AC-DC ADAPTERS and chargers, building DC-DC BOOST AND BUCK CONVERTERS using current-mode control, and general HIGH-PERFORMANCE POWER REGULATION circuits.

Projectile Electronics Quality and Trust. We guarantee high-quality UC3845 ICs with reliable internal oscillator stability and precise current sensing capabilities, ensuring your power supplies are regulated, highly efficient, and dependable. The UC3845 is a TRUSTED SOLUTION for professional power control. For any support or technical query, please contact Projectile Electronics at 01779-150816.

Package Includes: 1 × UC3845 Current-Mode PWM Controller IC (DIP-8).