UC2843AQ - TI

The pictures are for reference only, and the specific specifications can be found in the product manual.

Part No

UC2843AQ
Manufacturer

TI
ChipWorker Part#

CW135273126
Category

PWM Controller IC
Package

PLCC-20
Description

AC to DC Switching Converter Off-Line Switcher/SMPS Controller 500kHz Tube 20Pin PLCC
Documentation

Datasheet

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UC2843AQ Specifications

Attribute	Attribute Value

Part Number	UC2843AQ
Manufacturer	TI
ChipWorker Part#	CW135273126
Category	PWM Controller IC
Documentation	Datasheet
Mounting Style	Surface Mount
Number of Pins	20 Pin
Case/Package	PLCC-20
Frequency	450 kHz
Supply Voltage (DC)	12.0V (min)
Number of Outputs	1 Output
Output Voltage	15 V
Output Current	200 mA
Number of Regulated Outputs	1 Output
Rise Time	50 ns
Switching Frequency	500kHz (MAX)
Topology	Boost, Flyback, Forward
Duty Cycle	100 %
Maximum Duty Cycle	96 %
Fall Time	50 ns
Operating Temperature (Max)	85 ℃
Operating Temperature (Min)	-40 ℃
Supply Voltage	7.6V ~ 30V
Supply Voltage (Max)	25 V
Supply Voltage (Min)	12 V
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Operating Temperature	-40℃ ~ 125℃ (TJ)
Product Lifecycle Status
Packaging	Tube
RoHS	RoHS Compliant
Lead-Free Status	Lead Free
REACH SVHC Compliance Edition	2015/06/15

Product 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 guaranteed to be less than 0.5 mA. Oscillator discharge is trimmed to 8.3 mA. During under voltage lockout, the output stage can sink at least 10 mA at less than 1.2 V for VCC over 5 V.
The difference between members of this family are shown in the table below.
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

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