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Home > Comparator ICs > Discrete Semiconductors > Texas Instruments UC2843AN PWM Controller

Texas Instruments UC2843AN PWM Controller

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Texas Instruments UC2843AN Current Mode PWM Controller 1A 8-Pin PDIP Tube

Texas Instruments UC2843AN PWM Controller

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Texas Instruments UC2843AN Current Mode PWM Controller 1A 8-Pin PDIP Tube

The UCx84xA family of control ICs is a pin-for-pin compatible improved version of the UCx84x family. Providing the necessary features to control current-mode or switched-mode power supplies, this family of devices has many improved features: startup current is less than 0.5 mA, oscillator discharge is trimmed to 8.3 mA, and during UVLO, the output stage can sink at least 10 mA at less than 1.2 V for VCC over 5 V.

Category Integrated Circuits (ICs)
Family PMIC - Voltage Regulators - DC DC Switching Controllers
Series -
Packaging ? Tube ?
Number of Outputs 1
Frequency - Max 500kHz
Duty Cycle 100%
Voltage - Supply 7.6 V ~ 30 V
Buck No
Boost Yes
Flyback Yes
Inverting No
Doubler No
Divider No
Cuk No
Isolated Yes
Operating Temperature -40°C ~ 85°C
Package / Case 8-DIP (0.300", 7.62mm)
Supplier Device Package 8-PDIP
Online Catalog Current Mode



  • 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

Additional Information

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