//
UC3843BD1R2G
IC FLYBACK CTRL CURRENT MODE 250KHZ 8SOIC
onsemi
View in 3D
Want something different?
Bypass caps, pull-ups, strapping resistors, custom silkscreen & more
Design a Custom BoardAbout This Component
High-performance fixed-frequency current-mode controller designed for off-line and DC-DC converter applications. Features trimmed oscillator at 250 kHz, cycle-by-cycle current limiting, undervoltage lockout with hysteresis, and high-current totem-pole output for driving power MOSFETs. Includes error amplifier and temperature-compensated reference for precise regulation in isolated power supplies.
Package: SOIC-8 (3.9×4.9mm) · 8 pins
Why does this need a breakout?
An 8-pin SOIC with 1.27mm pitch is too fine for breadboards and hand-soldering without a microscope. A breakout board routes these pins to standard 0.1" headers, enabling rapid prototyping and reliable connections for op-amps, transceivers, and small power MOSFETs without requiring reflow equipment.
Specifications
ELECTRICAL CHARACTERISTICS
| Manufacturer | onsemi |
| Part Number | UC3843BD1R2G |
| Package | SOIC-8 (3.9×4.9mm) |
| Pin Count | 8 |
| Frequency - Switching | Up to 500kHz |
| Number of Outputs | 1 |
| Output Configuration | Positive, Isolation Capable |
| Output Type | Transistor Driver |
| Topology | Boost, Flyback |
| Voltage - Supply (Vcc/Vdd) | 7.6V ~ 30V |
What's Included
BILL OF MATERIALS
- 1x UC3843BD1R2G soldered onto breakout PCB
- Pin headers pre-soldered (2.54mm / 0.1" pitch)
- All IC pins broken out to 2.54mm headers
Breakout Board Design
PCB SPECIFICATIONS
WIDTH
< 0.9" (straddles breadboard)
PITCH
2.54mm standard
SOLDER
Lead-free, reflow assembled
FINISH
FR4, lead-free HASL