This datasheet is a detailed introduction of BD9673EFJ product, introducing the product's features and characteristics, such as internal integrated Nch MOSFET, output current, working frequency, feedback voltage, etc.
This technical note describes the BD9673EFJ single‑chip step‑down switching regulator with an internal power MOSFET. It outlines the device’s features, absolute maximum ratings, electrical characteristics, pin assignments, and block diagram, and includes detailed application information such as synchronization, soft‑start, and over‑current protection.
The document also provides ordering information, package details (HTSOP‑J8), and a notice on usage restrictions and safety considerations. It is intended for designers integrating the regulator into household electronics and other general‑purpose equipment.
| Output Current | 1.54 A |
|---|---|
| Oscillation Frequency | 300 kHz |
| Internal MOSFET Resistance | 200 mΩ |
| Feedback Voltage | 1.0 V ±1.0 % |
| Package | HTSOP‑J8 |
| Supply Voltage (VCC‑GND) | 45 V |
| Stand‑by Current (VCC) | 0 µA |
The device can deliver up to 1.54 A of output current.
Connect a square‑wave signal (2 V – high, <0.8 V – low) to the SYNC pin; the synchronization frequency range is 200 kHz to 500 kHz.
Yes, the device has an internal over‑current protection circuit that stops the output and restarts after about 13 ms.
It is supplied in an HTSOP‑J8 surface‑mount package.