UC3845
The UC3845 is a reliable current‑mode PWM controller designed for efficient power regulation in various applications. Supporting high‑frequency switching and precise control, the UC3845 ensures stable operation under demanding conditions. It is suitable for industrial and commercial power‑electronics systems, including LED drivers, battery chargers, DC–DC converters, and motor control units. Its compact packaging allows efficient use of PCB space in modern electronic designs.
The UC3845 integrates an internally trimmed reference, a high-current totem‑pole output, and built-in protections such as under‑voltage lockout (UVLO) and current limiting. These features ensure reliable driving of external MOSFETs while preventing overcurrent events and unsafe start-up voltages. Its low start-up current and flexible voltage supply range provide stable operation even in battery‑powered or energy-sensitive applications. The IC supports various power supply topologies, maintaining consistent regulation and efficient performance.
The controller is suitable for compact SMPS, LED-lighting drivers, battery charging systems, and industrial control units. With support for up to 500 kHz switching frequency and stable operation under varying loads, the UC3845 is a key component for efficient power management.
Key Specs
| Parameter | Value |
|---|---|
| Supply Voltage Range (V<sub>CC</sub>) | 7.6 V – 30 V |
| Reference Voltage (VREF) | 5.0 V ± ~2% |
| Maximum Switching Frequency | Up to 500 kHz |
| Maximum Duty Cycle | 50% (for forward‑converter topologies) |
| Output Drive Current (Peak) | ± 1 A peak |
| Start-up Current (Quiescent) | ~0.5 mA typical |
| Operating Supply Current | ≈ 11 mA typical |
| Internal Protections | UVLO with hysteresis; cycle‑by‑cycle current limiting |
| Output Type / Drive Stage | High‑current totem‑pole output for MOSFETs |
| Package Options | DIP‑8 and SOP‑8 / SOIC |
| Supported Topologies / Applications | Buck, Boost, Buck‑Boost, Flyback, Forward converters; SMPS, LED drivers, DC–DC modules, battery chargers, industrial power supplies |
We dispatch all orders through Leopard Courier and TCS, while bulk or heavy shipments are sent via cargo (bilty) for safer handling and better rates. Standard delivery time is 2–3 working days for both courier and cargo deliveries, depending on your location. Orders are dispatched within 24 hours after payment confirmation, and the tracking number is shared on WhatsApp once shipped. Shipping charges depend on parcel weight and destination, and may be waived for bulk or corporate orders. Please ensure your contact details and address are accurate to avoid delays. For urgent delivery or specific shipping requirements, contact us directly on WhatsApp at 0303 56888 44.
Recently Viewed
People Also Bought
Here’s some of our most similar products people are buying. Add it to cart now
