UC2843A-Q1 Series

30-V, 1-A, 500KHz current mode PWM controller with 8.4V/7.6V UVLO 100% duty cycle 40°C to 85°C

Catalog

30-V, 1-A, 500KHz current mode PWM controller with 8.4V/7.6V UVLO 100% duty cycle 40°C to 85°C

Part	Current - Supply	Voltage - Input [Min]	Voltage - Input [Max]	Grade	Package / Case	Package / Case [y]	Package / Case [x]	Mounting Type	Qualification	Voltage - Supply [Max]	Voltage - Supply [Min]	Applications	Supplier Device Package	Operating Temperature [Max]	Operating Temperature [Min]
Texas Instruments UC2843AD8TR	11 mA	-3 V	6.3 V	Automotive	8-SOIC	3.9 mm	0.154 in	Surface Mount	AEC-Q100	30 VDC	7.6 V	PWM Controller	8-SOIC	85 °C	-40 °C
Texas Instruments UC2843D	11 mA	-3 V	6.3 V		14-SOIC	3.9 mm	0.154 in	Surface Mount		28 V	12 V	PWM Controller		85 °C	-40 °C
Texas Instruments UC2843D8TR	11 mA	-3 V	6.3 V		8-SOIC	3.9 mm	0.154 in	Surface Mount		28 V	12 V	PWM Controller	8-SOIC	85 °C	-40 °C
Texas Instruments UC2843AQD8R	11 mA	-3 V	6.3 V		8-SOIC	3.9 mm	0.154 in	Surface Mount		30 VDC	7.9 V	PWM Controller	8-SOIC	125 °C	-40 °C
Texas Instruments UC2843AQD8RQ1	11 mA	-3 V	6.3 V		8-SOIC	3.9 mm	0.154 in	Surface Mount		30 VDC	7.9 V	PWM Controller	8-SOIC	125 °C	-40 °C
Texas Instruments UC2843AD8TRG4	11 mA	-3 V	6.3 V	Automotive	8-SOIC	3.9 mm	0.154 in	Surface Mount	AEC-Q100	30 VDC	7.6 V	PWM Controller	8-SOIC	85 °C	-40 °C
Texas Instruments UC2843D8G4	11 mA	-3 V	6.3 V		8-SOIC	3.9 mm	0.154 in	Surface Mount		28 V	12 V	PWM Controller	8-SOIC	85 °C	-40 °C
Texas Instruments UC2843D8TRG4	11 mA	-3 V	6.3 V		8-SOIC	3.9 mm	0.154 in	Surface Mount		28 V	12 V	PWM Controller	8-SOIC	85 °C	-40 °C
Texas Instruments UC2843AQ	11 mA	-3 V	6.3 V		20-LCC (J-Lead)			Surface Mount		30 VDC	7.9 V	PWM Controller	20-PLCC (9x9)	125 °C	-40 °C
Texas Instruments UC2843AD8	11 mA	-3 V	6.3 V	Automotive	8-SOIC	3.9 mm	0.154 in	Surface Mount	AEC-Q100	30 VDC	7.6 V	PWM Controller	8-SOIC	85 °C	-40 °C

Catalog

30-V, 1-A, 500KHz current mode PWM controller with 8.4V/7.6V UVLO 100% duty cycle 40°C to 85°C

Key Features

• Qualified for automotive applicationsExtended temperature performance of –40°C to 125°COptimized for off-line and DC-to-DC convertersLow start-up current (<0.5mA)Trimmed oscillator-discharge currentAutomatic feed-forward compensationPulse-by-pulse current limitingEnhanced load-response characteristicsUnder-voltage lockout with hysteresisDouble-pulse suppressionHigh-current totem-pole outputInternally trimmed bandgap reference500kHz operationLow RO Error AmpCreate a Custom Design Using the UC2843A-Q1 With theWEBENCH Power DesignerQualified for automotive applicationsExtended temperature performance of –40°C to 125°COptimized for off-line and DC-to-DC convertersLow start-up current (<0.5mA)Trimmed oscillator-discharge currentAutomatic feed-forward compensationPulse-by-pulse current limitingEnhanced load-response characteristicsUnder-voltage lockout with hysteresisDouble-pulse suppressionHigh-current totem-pole outputInternally trimmed bandgap reference500kHz operationLow RO Error AmpCreate a Custom Design Using the UC2843A-Q1 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.