The BH6456GUL is a small lens driver from ROHM that uses a 2-wire serial interface and is compatible with I2C BUS. It is used in auto focus systems using a Piezo actuator. This lens driver has a low on-resistance, a built-in 15MHz oscillator, under voltage lockout (UVLO), thermal shutdown (TSD) circuit, and a standby current consumption of 0μA. This product is suitable for auto focus systems in mobile phone cameras.
The BH6456GUL is an ultra‑small lens driver for voice‑coil motor autofocus systems in mobile phone cameras. It features a low ON‑resistance H‑bridge, built‑in 15 MHz oscillator, UVLO, and thermal shutdown, and operates over a temperature range of –25 °C to +85 °C.
The document includes absolute maximum ratings, operating conditions, package dimensions, pin arrangement, 2‑wire serial interface details, timing characteristics, driving‑wave settings, and ordering information. It is intended for designers integrating the driver into camera modules and related electronic equipment.
| Supply voltage VCC (absolute max) | -0.3 to +4.5 V |
|---|---|
| Supply voltage VCC (typical operating) | 2.3 V to 3.6 V |
| Motor supply voltage VM (absolute max) | -0.3 to +5.5 V |
| Motor supply voltage VM (typical operating) | 2.3 V to 4.8 V |
| Operating temperature range | -25 °C to +85 °C |
| H‑bridge output current (absolute max) | -500 mA to +500 mA |
| H‑bridge output current (typical) | +400 mA |
| ON‑Resistance (typical) | 0.702 Ω |
| Standby current consumption (typical) | uA |
| 2‑wire serial interface transmission rate | 400 kHz |
The device operates from –25 °C up to +85 °C.
The serial interface can transmit up to 400 kHz.
Typical VCC is between 2.3 V and 3.6 V.
The H‑bridge can source or sink up to ±500 mA (typical ±400 mA).