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UC3842B Breakout
PWM CONTROLLER CURRENT MODE 500KHZ SOP-8
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Design a Custom BoardAbout This Component
Fixed-frequency current-mode PWM controller designed for offline and DC-DC converter applications. Integrates trimmed oscillator, temperature-compensated reference, error amplifier, current-sensing comparator, and high-current totem-pole output (1A) for MOSFET gate driving. Features undervoltage lockout with hysteresis, low startup current (0.5mA), and operates up to 500kHz with minimal external components.
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.
Component specifications
ELECTRICAL CHARACTERISTICS
| Manufacturer | UMW |
| Part Number | UC3842B |
| Package | SOIC-8 (3.9×4.9mm) |
| Pin Count | 8 |
| Frequency - Switching | Up to 500kHz |
| Output Type | PWM |
| Topology | Boost, Flyback |
| Voltage - Supply (Vcc/Vdd) | 10V ~ 30V |
What's Included
BILL OF MATERIALS
- 1x UC3842B 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