BD6757KN and BD6889GU stepper motor drivers provide 6 full-ON drive H-bridge channels and 1 linear constant-current drive H-bridge channel. Stepping motors can be used for the auto focus, zoom, and iris, making it possible to configure a sophisticated, high precision lens drive system. ROHM’s motor drivers are both compact, multifunctional, and enable advanced features such as lens barrier and anti shock.
This technical note provides detailed information on ROHM's BD6757KN and BD6889GU motor driver ICs, including their features, absolute maximum ratings, operating conditions, and electrical characteristics. The document also contains pin arrangement diagrams, application circuit examples, and ordering information.
The drivers offer six full‑ON H‑bridge channels and one linear constant‑current drive channel, suitable for autofocus, zoom, and iris control in digital still and single‑lens reflex cameras. Key specifications such as supply voltage ranges, output resistance, and temperature limits are listed for design reference.
| Power supply voltage VCC (absolute max) | -0.5 V to +7.0 V |
|---|---|
| Motor power supply voltage VM (absolute max) | -0.5 V to +10.0 V (BD6757KN) |
| Operating temperature range | -25 °C to +75 °C (BD6757KN), -25 °C to +85 °C (BD6889GU) |
| Full‑ON Drive block typical ON‑Resistance | 1.3 Ω typ. |
| Package size (BD6889GU) | 5.0 × 5.0 × 4.2 mm |
It uses a subminiature grid array package measuring 5.0 × 5.0 × 4.2 mm.
The typical ON‑Resistance is about 1.3 Ω.
The VCC may range from –0.5 V to +7.0 V.
It can operate from –25 °C up to +85 °C.