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Manufacturer Part #


UC3843B Series 30 V 17 mA High Performance Current Mode PWM Controller - SOIC-8

Product Specification Section
Technical Attributes
Attributes Table
Supply Current-Max: 17mA
Supply Voltage: 7.6V to 30V
Frequency-Max: 275kHz
Input Voltage: 2.55V
Topology: Boost/Flyback
Rated Power: 800W
Duty Cycle-Min: 0%
Duty Cycle-Max: 100%
Operating Temp Range: -40°C to +150°C
Storage Temperature Range: -65°C to +150°C
Output Current: 1mA
Thermal Resistance: 150°C/W
Package Style:  SOIC-8
Mounting Method: Surface Mount
Features & Applications
The UC3843BD1013TR is a part of UC384xB family of control ICs, provides the necessary features to implement off-line or DC to DC fixed frequency current mode control schemes with a minimal external parts count.

The devices are ideal for sensor interfaces, battery-supplied and portable applications, as well as active filtering. It has an Operating temperature ranges b/w -40 °C to 150 °C and it is available in a SOIC-8 package.


  • 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 
  • Low start-up and operating current
Pricing Section
Web Price:
$0.87 USD Each
Cost Per Unit

$7.00 reeling fee is amortized over the number of components for each reel.
Mini-Reels are a custom product and are non-cancelable and non-returnable.