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Home > Semiconductors > Power Management ICs > Switching Converters, Regulators & Controllers > Motorola UC3843BN Switching Controller 4.9 to 5.1 output 1A DIP-8

Motorola UC3843BN Switching Controller 4.9 to 5.1 output 1A DIP-8

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Quick Overview

Motorola - Mot Uc3843Bn Pulse Width Modulation (PWM) Controller IC; Package/Case:8-DIP; No. of Pins:8; Leaded Process Compatible:Yes; Peak Reflow Compatible (260 C):Yes; Mounting Type:Through Hole

Motorola UC3843BN Switching Controller 4.9 to 5.1 output 1A DIP-8

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Motorola UC3843BN Switching Controller 4.9 to 5.1 output 1A DIP-8 Through Hole

The UC3842B, UC3843B series are high performance fixed frequency current mode controllers. They are specifically designed for Off–Line and dc–to–dc converter applications offering the designer a cost–effective solution with minimal external components. These integrated circuits feature a trimmed oscillator for precise duty cycle control, a temperature compensated reference, high gain error amplifier, current sensing comparator, and a high current totem pole output ideally suited for driving a power MOSFET.

Also included are protective features consisting of input and reference undervoltage lockouts each with hysteresis, cycle–by–cycle current limiting, programmable output deadtime, and a latch for single pulse metering.
The UCX842B has UVLO thresholds of 16 V (on) and 10 V (off), ideally suited for off–line converters. The UCX843B is tailored for lower voltage applications having UVLO thresholds of 8.5 V (on) and 7.6 V (off).
•Trimmed Oscillator for Precise Frequency Control
•Oscillator Frequency Guaranteed at 250 kHz
•Current Mode Operation to 500 kHz
•Automatic Feed Forward Compensation
•Latching PWM for Cycle–By–Cycle Current Limiting
•Internally Trimmed Reference with Undervoltage Lockout
•High Current Totem Pole Output
•Undervoltage Lockout with Hysteresis
•Low Startup and Operating Curren

Additional Information

Manufacturer: Motorola
Product Category: Switching Controllers
Brand: Motorola
Topology: Boost, Flyback, Forward
Number of Outputs: 1 Output
Switching Frequency: 500 kHz
Duty Cycle - Max: 100 %
Output Voltage: 4.90 V to 5.10 V
Output Current: 1000 mA
Maximum Operating Temperature: + 150 C
Mounting Style: Through Hole
Package / Case: DIP-8
Minimum Operating Temperature: - 40 C
Click here to Download Datasheet I
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