UC3843AM - Microsemi

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

Part No

UC3843AM
Manufacturer

Microsemi
ChipWorker Part#

CW84291233
Category

AC to DC Converter, AC/DC Power Module
Package

DIP-8
Description

AC to DC Switching Converter Flyback 500kHz 8Pin PDIP
Documentation

Datasheet

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UC3843AM Specifications

Attribute	Attribute Value

Part Number	UC3843AM
Manufacturer	Microsemi
ChipWorker Part#	CW84291233
Category	AC to DC Converter, AC/DC Power Module
Documentation	Datasheet
Mounting Style	Through Hole
Number of Pins	8 Pin
Case/Package	DIP-8
Supply Voltage (DC)	30.0 V
Number of Outputs	1 Output
Output Voltage	5 V
Quiescent Current	11.0 mA
Rise Time	50 ns
Switching Frequency	500 kHz
Duty Cycle	100 %
Maximum Duty Cycle	0.96
Fall Time	50 ns
Operating Temperature (Max)	70 ℃
Operating Temperature (Min)	0 ℃
Power Dissipation (Max)	1000 mW
Supply Voltage	8.2V ~ 25V
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Operating Temperature	0℃ ~ 70℃ (TA)
Product Lifecycle Status	Active
Packaging	Tube
RoHS	RoHS Compliant
Lead-Free Status	Contains Lead

Product Description

DESCRIPTION
The UC184xA family of control ICs provides all the necessary features to implement off-line fixed-frequency, current-mode switching power supplies with a minimum of external components. The current mode architecture demonstrates improved load regulation, pulse-by-pulse current limiting and inherent protection of the power supply output switch. The IC includes: A bandgap reference trimmed to ±1% accuracy, an error amplifier, a current sense comparator with internal clamp to 1V, a high current totem pole output stage for fast switching of power MOSFET"s, and an externally programmable oscillator to set frequency and maximum duty cycle. The undervoltage lock-out is designed to operate with 250µA typ. start-up current, allowing an efficient bootstrap supply voltage design.
KEY FEATURES
■ LOW START-UP CURRENT. (0.5mA max.)
■ TRIMMED OSCILLATOR DISCHARGE CURRENT. (See Product Highlight)
■ OPTIMIZED FOR OFF-LINE AND DC-TO-DC CONVERTERS.
■ 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.
■ 500KHz OPERATION.
■ LOW RO ERROR AMPLIFIER.
APPLICATIONS
■ ECONOMICAL OFF-LINE FLYBACK OR FORWARD CONVERTERS.
■ DC-DC BUCK OR BOOST CONVERTERS.
■ LOW COST DC MOTOR CONTROL.

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