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UC2845AQ

ACTIVE

Automotive single ended 500KHz current mode PWM controller with 8.5V/7.9V UVLO 50% duty cycle

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Data sheet

UC2845AQ

ACTIVE
Data sheet Order now

Product details

Rating Automotive Topology Boost, Flyback, Forward Vin (max) (V) 40 Control mode Current Features Adjustable switching frequency, Current limiting, Dead time control, Error amplifier, Fixed frequency, Multi-topology Operating temperature range (°C) -40 to 125 Duty cycle (max) (%) 50
Rating Automotive Topology Boost, Flyback, Forward Vin (max) (V) 40 Control mode Current Features Adjustable switching frequency, Current limiting, Dead time control, Error amplifier, Fixed frequency, Multi-topology Operating temperature range (°C) -40 to 125 Duty cycle (max) (%) 50
SOIC (D) 8 29.4 mm² 4.9 x 6 SOIC (D) 14 51.9 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 (<0.5mA)
  • 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
  • 500kHz 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 (<0.5mA)
  • 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
  • 500kHz 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 designed to be less than 0.5mA. Oscillator discharge is trimmed to 8.3mA. During under voltage lockout, the output stage can sink at least 10mA at less than 1.2V for VCC over 5V.

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 designed to be less than 0.5mA. Oscillator discharge is trimmed to 8.3mA. During under voltage lockout, the output stage can sink at least 10mA at less than 1.2V for VCC over 5V.

The difference between members of this family are shown in the table below.
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* Data sheet UC2842AQ, UC2843AQ, UC2844AQ, UC2845AQ Current-mode PWM Controller datasheet (Rev. A) PDF | HTML 11 Oct 2024

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SOIC (D) 8 Ultra Librarian
SOIC (D) 14 Ultra Librarian
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