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UC3852NG4 . - 

PFC Controller IC, 5 V to 30 V & 6 mA Supply, 5 V Lockout, 95 % Duty Cycle, 0.2 MHz, DIP-8

UC3852NG4 . - PFC Controller IC, 5 V to 30 V & 6 mA Supply, 5 V Lockout, 95 % Duty Cycle, 0.2 MHz, DIP-8

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Manufacturer Part No:
UC3852NG4 .
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Product Overview

The UC3852NG4 is a high Power Factor Preregulator provides active power-factor correction for systems that would otherwise draw high peak current pulses from AC power lines. This circuit implements zero-current switched boost conversion, producing sinusoidal input currents with a minimum of external components, while keeping peak current substantially below that of fully-discontinuous converters. It provides controlled switch on-time to regulate the output bulk DC voltage, an off-time defined by the boost inductor and a zero-current sensing circuit to reactivate the switch cycle. Even though switching frequency varies with both load and instantaneous line voltage, it can be maintained within a reasonable range to minimize noise generation. While allowing higher peak switch currents than continuous PFCs such as the pre-regulator, this device offers less external circuitry and smaller inductors, yet better performance and easier line-noise filtering than discontinuous current PFCs.
  • >0.99 Power factor
  • Few external parts required
  • Controlled on-time boost PWM
  • Zero-current switching
  • Limited peak current
  • Minimum and maximum frequency limits
  • <1mA Starting current
  • High-current FET drive output
  • Under-voltage lockout
  • Green product and no Sb/Br


Power Management

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