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UC2843A-Q1

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Automotive 8.5V to 30V, up to 500kHz current mode PWM controller

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Data sheet

UC2843A-Q1

ACTIVE
Data sheet Order now

Product details

Vin (max) (V) 28 Operating temperature range (°C) -40 to 125 Control mode Current Topology Boost, Buck boost, Flyback, Forward Rating Automotive Duty cycle (max) (%) 100
Vin (max) (V) 28 Operating temperature range (°C) -40 to 125 Control mode Current Topology Boost, Buck boost, Flyback, Forward Rating Automotive Duty cycle (max) (%) 100
SOIC (D) 8 29.4 mm² 4.9 x 6
  • Qualified for automotive applications
  • 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

  • Create a Custom Design Using the UC2843A-Q1 With the WEBENCH Power Designer
  • Qualified for automotive applications
  • 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

  • Create a Custom Design Using the UC2843A-Q1 With the WEBENCH Power Designer

The UC2843A-Q1 control device is a pin-for-pin compatible improved version of the UC2843. Providing the necessary features to control current mode switched mode power supplies, this device has the following improved features. Start up current is specified to be less than 0.5 mA. Oscillator discharge is trimmed to 8.3 mA. During undervoltage lockout, the output stage can sink at least 10 mA at less than 1.2 V for VCC over 5 V.

The UC2843A-Q1 control device is a pin-for-pin compatible improved version of the UC2843. Providing the necessary features to control current mode switched mode power supplies, this device has the following improved features. Start up current is specified to be less than 0.5 mA. Oscillator discharge is trimmed to 8.3 mA. During undervoltage lockout, the output stage can sink at least 10 mA at less than 1.2 V for VCC over 5 V.
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* Data sheet UC2843A-Q1 Current-Mode PWM Controller datasheet (Rev. A) PDF | HTML 13 Dec 2021

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