UC2845AQ Series

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

Catalog

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

Part	Current - Supply	Applications	Mounting Type	Supplier Device Package	Voltage - Supply [Max]	Voltage - Supply [Min]	Operating Temperature [Min]	Operating Temperature [Max]	Voltage - Input [Min]	Voltage - Input [Max]	Package / Case	Package / Case [y]	Package / Case [x]	Package / Case	Package / Case
Texas Instruments UC2845AQD8R	11 mA	PWM Controller	Surface Mount	8-SOIC	30 VDC	7.9 V	-40 °C	125 °C	-3 V	6.3 V	8-SOIC	3.9 mm	0.154 in
Texas Instruments UC2845AQD	11 mA	PWM Controller	Surface Mount		30 VDC	7.9 V	-40 °C	125 °C	-3 V	6.3 V	14-SOIC	3.9 mm	0.154 in
Texas Instruments UC2845NG4	11 mA	PWM Controller	Through Hole	8-PDIP	28 V	12 V	-40 °C	85 °C	-3 V	6.3 V	8-DIP			0.3 in	7.62 mm
Texas Instruments UC2845ADTR	11 mA	PWM Controller	Surface Mount		30 VDC	7.6 V	-40 °C	85 °C	-3 V	6.3 V	14-SOIC	3.9 mm	0.154 in
Texas Instruments UC2845D8TRG4	11 mA	PWM Controller	Surface Mount	8-SOIC	28 V	12 V	-40 °C	85 °C	-3 V	6.3 V	8-SOIC	3.9 mm	0.154 in
Texas Instruments UC2845AD8TRG4	11 mA	PWM Controller	Surface Mount	8-SOIC	30 VDC	7.6 V	-40 °C	85 °C	-3 V	6.3 V	8-SOIC	3.9 mm	0.154 in
Texas Instruments UC2845AD8G4	11 mA	PWM Controller	Surface Mount	8-SOIC	30 VDC	7.6 V	-40 °C	85 °C	-3 V	6.3 V	8-SOIC	3.9 mm	0.154 in
Texas Instruments UC2845AD8	11 mA	PWM Controller	Surface Mount	8-SOIC	30 VDC	7.6 V	-40 °C	85 °C	-3 V	6.3 V	8-SOIC	3.9 mm	0.154 in
Texas Instruments UC2845AQDR	11 mA	PWM Controller	Surface Mount		30 VDC	7.9 V	-40 °C	125 °C	-3 V	6.3 V	14-SOIC	3.9 mm	0.154 in
Texas Instruments UC2845DTRG4	11 mA	PWM Controller	Surface Mount		28 V	12 V	-40 °C	85 °C	-3 V	6.3 V	14-SOIC	3.9 mm	0.154 in

Catalog

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

Key Features

• Optimized for Off-Line and DC-DC ConvertersLow Start-Up Current (< 0.5mA)Trimmed Oscillator Discharge CurrentAutomatic Feedforward CompensationPulse-by-Pulse Current LimitingEnhanced Load Response CharacteristicsUndervoltage Lockout With HysteresisDouble Pulse SuppressionHigh-Current Totem Pole OutputInternally-Trimmed Bandgap ReferenceUp to 500kHz OperationCreate a Custom Design Using the UCx84xA With theWEBENCH Power DesignerOptimized for Off-Line and DC-DC ConvertersLow Start-Up Current (< 0.5mA)Trimmed Oscillator Discharge CurrentAutomatic Feedforward CompensationPulse-by-Pulse Current LimitingEnhanced Load Response CharacteristicsUndervoltage Lockout With HysteresisDouble Pulse SuppressionHigh-Current Totem Pole OutputInternally-Trimmed Bandgap ReferenceUp to 500kHz OperationCreate a Custom Design Using the UCx84xA With theWEBENCH Power Designer

Description

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.