UC2845ADW/80976

Obsolete

Texas Instruments

UC2845A CURRENT MODE PWM CONTROL

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UC2845ADW/80976

Obsolete

Texas Instruments

UC2845A CURRENT MODE PWM CONTROL

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Alpha

Description Specifications Series Pricing CAD Documents

Description

General part information

UC2845 Series

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.

Technical Specifications

Parameters and characteristics for this part

Specification	UC2845ADW/80976

Clock Sync	No
Control Features	Frequency Control
Duty Cycle (Max)	48 %
Frequency - Switching (Max)	500 kHz
Function	Step-Up, Step-Up/Step-Down
Mounting Type	Surface Mount
Number of Outputs	1
Operating Temperature (Max)	85 °C
Operating Temperature (Min)	-40 °C
Output Configuration	Positive, Isolation Capable
Output Phases	1
Output Type	Transistor Driver
Package Length	0.295 in
Package Name	16-SOIC
Package Width	7.5 mm
Synchronous Rectifier	No
Topology	Buck, Forward, Boost, Flyback
Voltage - Supply (Vcc/Vdd) Maximum	30 V
Voltage - Supply (Vcc/Vdd) Minimum	7.6 V

UC2845 Series

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

Part	Current - Supply	Voltage - Input (Minimum)	Voltage - Input (Maximum)	Applications	Operating Temperature (Max)	Operating Temperature (Min)	Voltage - Supply (Minimum)	Voltage - Supply (Maximum)	Mounting Type	Package Length	Package Name	Package Width
Texas Instruments UC2845AD8TR	11 mA	-0.3 V	6.3 V	PWM Controller	85 °C	-40 °C	7.6 V	30 VDC	Surface Mount	0.154 in	8-SOIC	3.9 mm
Texas Instruments UC2845AN	11 mA	-0.3 V	6.3 V	PWM Controller	85 °C	-40 °C	7.6 V	30 VDC	Through Hole	0.3 in	8-DIP 8-PDIP	7.62 mm

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

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CAD

3D models and CAD resources for this part

Documents

Technical documentation and resources

UC2845ADW/80976 | Datasheet