Product details

Topology Boost, Flyback, Forward Duty cycle (Max) (%) 50 Supply voltage (Max) (V) 40 UVLO thresholds on/off (V) 8.5/7.9 Features Adjustable Switching Frequency, Current Limiting, Dead Time Control, Error Amplifier, Multi-topology Operating temperature range (C) -40 to 125 Rating Automotive Frequency (Max) (kHz) 500 Gate drive (Typ) (A) 1
Topology Boost, Flyback, Forward Duty cycle (Max) (%) 50 Supply voltage (Max) (V) 40 UVLO thresholds on/off (V) 8.5/7.9 Features Adjustable Switching Frequency, Current Limiting, Dead Time Control, Error Amplifier, Multi-topology Operating temperature range (C) -40 to 125 Rating Automotive Frequency (Max) (kHz) 500 Gate drive (Typ) (A) 1
SOIC (D) 8 19 mm² 4.9 x 3.9 SOIC (D) 14 52 mm² 8.65 x 6
  • Extended Temperature Performance of –40°C to 125°C
  • Optimized for Off-line and DC to DC Converters
  • Low Start Up Current (<0.5 mA)
  • Trimmed Oscillator Discharge Current
  • Automatic Feed Forward Compensation
  • Pulse-by-Pulse Current Limiting
  • Enhanced Load Response Characteristics
  • Under-Voltage Lockout With Hysteresis
  • Double Pulse Suppression
  • High Current Totem Pole Output
  • Internally Trimmed Bandgap Reference
  • 500 kHz Operation
  • Low RO Error Amp

  • Extended Temperature Performance of –40°C to 125°C
  • Optimized for Off-line and DC to DC Converters
  • Low Start Up Current (<0.5 mA)
  • Trimmed Oscillator Discharge Current
  • Automatic Feed Forward Compensation
  • Pulse-by-Pulse Current Limiting
  • Enhanced Load Response Characteristics
  • Under-Voltage Lockout With Hysteresis
  • Double Pulse Suppression
  • High Current Totem Pole Output
  • Internally Trimmed Bandgap Reference
  • 500 kHz Operation
  • Low RO Error Amp

The UC2842A/3A/4A/5A family of control ICs is a pin for pin compatible improved version of the UC2842/3/4/5 family. Providing the necessary features to control current mode switched mode power supplies, this family has the following improved features. Start up current is guaranteed to be less than 0.5 mA. Oscillator discharge is trimmed to 8.3 mA. During under voltage lockout, the output stage can sink at least 10 mA at less than 1.2 V for VCC over 5 V.

The difference between members of this family are shown in the table below.

The UC2842A/3A/4A/5A family of control ICs is a pin for pin compatible improved version of the UC2842/3/4/5 family. Providing the necessary features to control current mode switched mode power supplies, this family has the following improved features. Start up current is guaranteed to be less than 0.5 mA. Oscillator discharge is trimmed to 8.3 mA. During under voltage lockout, the output stage can sink at least 10 mA at less than 1.2 V for VCC over 5 V.

The difference between members of this family are shown in the table below.

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Type Title Date
* Data sheet UC284xAQ: Current-Mode PWM Controller datasheet 21 Apr 2003

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SOIC (D) 8 View options
SOIC (D) 14 View options

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