UC3843BN ON Semiconductor, UC3843BN Datasheet - Page 2

• Manufacturer Part Number: UC3843BN
• Description: IC CTRLR CURRENT MODE HP 8DIP
• Manufacturer: ON Semiconductor

Specifications of UC3843BN

• Pwm Type: Current Mode
• Number Of Outputs: 1
• Frequency - Max: 275kHz
• Duty Cycle: 96%
• Voltage - Supply: 8.2 V ~ 25 V
• Buck: No
• Boost: Yes
• Flyback: Yes
• Inverting: No
• Doubler: No
• Divider: No
• Cuk: No
• Isolated: Yes
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 8-DIP (0.300", 7.62mm)
• Frequency-max: 275kHz
• Duty Cycle (max): 96 %
• Output Voltage: 4.9 V to 5.1 V
• Output Current: 1000 mA
• Mounting Style: Through Hole
• Switching Frequency: 500 KHz
• Operating Supply Voltage: 30 V
• Maximum Operating Temperature: + 70 C
• Fall Time: 50 ns
• Minimum Operating Temperature: 0 C
• Rise Time: 50 ns
• Synchronous Pin: No
• Topology: Boost, Flyback, Forward
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: UC3843BNOS

Product Discontinuance #16210
PLEASE NOTE: ON Semiconductor may implement minimum order quantities or dollar amounts
based on inventories available. Also, Devices on this Product Discontinuance become NCNR (Non-
Cancelable, Non-Returnable). Some devices identified in this notification were the result of the
acquisition of PTC devices from Analog Devices and due to certain manufacturing agreements the
normal 6 month last order date may not be able to be honored in all circumstances. In some
cases ON Semiconductor was left with zero inventories and may not be able to support lifetime
buy requirements, but we will commit to work with customer on an individual basis.
For questions or concerns regarding this notification, please contact your local sales office or customer
service representative.
NOTE: SUBSEQUENT TO PUBLISHING A DISCONTINUANCE NOTICE,
NOTE: TO ALLOW AN ORDERLY EXIT FROM THE MARKET, PRODUCT SHALL NOT BE
Issue Date: 11 Feb 2009
ON SEMICONDUCTOR WILL ALLOW SIX (6) MONTHS FROM THE
ANNOUNCEMENT DATE TO PLACE FINAL LIFETIME PURCHASE ORDERS.
DELIVERED AFTER TWELVE (12) MONTHS BEYOND THE ANNOUNCEMENT
DATE.
End of life buy orders must be placed before 31-Jul-2009
and End of life buy orders must be shipped before 31-Jan-2010
Rev.08-24-05
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