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Power Supply Controller PWM Controller 8-PDIP

UC3845AN General Description

The UC3845AN product belongs to the UCx84xA family, a series of control devices specifically designed to enhance the performance of current-mode and switched-mode power supplies. This device sets itself apart with a startup current requirement of less than 0.5 mA, ensuring low power consumption during initialization. The oscillator discharge is meticulously trimmed to 8.3 mA, guaranteeing precise control in power supply applications. Moreover, the UC3845AN excels in UVLO conditions, with the output stage capable of sinking at least 10 mA at voltages below 1.2 V for VCC levels above 5 V. These advanced features make the UC3845AN a superior choice for power supply control tasks, offering improved efficiency and reliability

Key Features

  • Optimized for Off-Line and DC-DC Converters
  • Low Start-Up Current (< 0.5 mA)
  • Trimmed Oscillator Discharge Current
  • Automatic Feedforward Compensation
  • Pulse-by-Pulse Current Limiting
  • Enhanced Load Response Characteristics
  • Undervoltage Lockout With Hysteresis
  • Double Pulse Suppression
  • High-Current Totem Pole Output
  • Internally-Trimmed Bandgap Reference
  • Up to 500-kHz Operation
  • Create a Custom Design Using the UCx84xA With the WEBENCH Power Designer


Topology Boost, Buck, Buck boost, Flyback, Forward Control mode Peak current mode
Duty cycle (max) (%) 50 Switching frequency (max) (kHz) 500
Features Adjustable switching frequency, Current limiting, Dead time control, Error amplifier, Multi-topology UVLO thresholds on/off (V) 8.4/7.6
Operating temperature range (°C) 0 to 70 Rating Catalog
Gate drive (typ) (A) 1 Vin (max) (V) 28

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In Stock: 7,890

Minimum Order: 1

Qty. Unit Price Ext. Price
1+ $0.802 $0.80
10+ $0.666 $6.66
30+ $0.598 $17.94
100+ $0.530 $53.00
500+ $0.489 $244.50
1000+ $0.470 $470.00

The prices below are for reference only.