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UC3845BD1013TR
PWM CONTROLLER CURRENT MODE BOOST/FLYBACK 8SOIC
STMicroelectronics
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Design a Custom BoardAbout This Component
Current-mode PWM controller IC for offline and DC-DC converter applications with fixed-frequency operation up to 500kHz. Features internal oscillator, precision reference, cycle-by-cycle current limiting, and high-current totem-pole output suitable for driving N-channel MOSFETs. The UC3845B variant operates at 8.5V UVLO threshold with 0-50% duty cycle range, ideal for low-voltage boost and flyback topologies with minimal external component count.
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 | STMicroelectronics |
| Part Number | UC3845BD1013TR |
| 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 UC3845BD1013TR 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