Date: 26/09/2008

PWM output H-bridge driver ICs for DC brush motors from ROHM

ROHM Electronics introduced new BD62xx Series of H-bridge driver ICs for DC brush motors offering upgrade path to pulse-width modulation (PWM) speed control using either analog or digital inputs.

The new device provides both a TTL-compatible interface to an external MCU as well as an internal Vref-PWM conversion circuit allowing implementation of PWM control from an analog voltage input.

The product line is offered in three operating voltage classes 7 V, 18 V and 36 V with current ratings in each class of 0.5 A, 1.0 A and 2.0 A

Some of the other features are listed below:

1. BiCMOS topology minimizes parts count and power consumption.
2. The P-channel / N- channel output configuration eliminates the need for an internal charge pump and external capacitors to operate the high-side switch.
3. Internal shutdown circuitry reduces standby current to less than 1 µA.
4. Pin-compatible packaging between the three voltage classes at each current level.

5. Two-channel versions offered at each voltage level are packaged with symmetrical pin-outs to simplify design and manufacturing.
6. Direct drop-in replacements for ROHM's legacy line of bipolor transistor output driver ICs.
7. Built-in Over-voltage protection (OVP), Under-voltage lock-out (UVLO), over-current protection (OCP) and high temperature shutdown (TSD).
8. Overlap (shoot-through) protection to prevent high currents during motor reversal or breaking is also built in.
9. Designed to withstand 4 kV ESD.
10. Specified for -40 to 85 °C operation.

Packaging: packaged in low-profile surface-mount with maximum height ranging from
1.15 mm (SSOP) to 2.2 mm (HRP7).

For complete details visit: http://www.rohmelectronics.com/h-bridge.html