UC3843BD1R2G Current Mode PWM Controller IC

Product Description

Description

UC3843BD1R2G: Current Mode PWM Controller 1A 8-Pin SOIC N T/R - Tape and Reel

Package: SOIC-8

Mfr. Part#: UC3843BD1R2G

Mfr.: ONSEMI

Datasheet: (e-mail or chat us for PDF file)

ROHS Status: 

Quality: 100% Original

Warranty: 180 days

 

Topology:	Boost, Flyback, Forward
Number of Outputs:	1 Output
Switching Frequency:	500 kHz
Duty Cycle - Max:	96 %
Input Voltage:	15 V
Output Voltage:	4.9 V to 5.1 V
Output Current:	1 A
Minimum Operating Temperature:	0 C
Maximum Operating Temperature:	+ 70 C
Mounting Style:	SMD/SMT
Package / Case:	SOIC-8
Packaging:	Reel
Packaging:	Cut Tape
Packaging:	MouseReel
Brand:	onsemi
Fall Time:	50 ns
Operating Supply Voltage:	30 V
Product Type:	Switching Controllers
Rise Time:	50 ns
Series:	UC3843B
Factory Pack Quantity:	2500
Subcategory:	PMIC - Power Management ICs
Type:	Current Mode PWM Controller
Unit Weight:	0.019048 oz

 

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. These devices are available in an 8-pin dual-in-line and surface mount (SO-8) plastic package as well as the 14-pin plastic surface mount (SO-14). The SO-14 package has separate power and ground pins for the totem pole output stage. 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).

Key Features

• 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 Current
• Pb-Free Packages are Available

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