2.2 Robot Drives

2.2.3 L6203 D.C motor driver

The IC is a full bridge driver for motor control applications realized in Multi power-BCD technology which combines isolated DMOS power transistors with CMOS and Bipolar circuits on the same chip.

By using mixed technology it has been possible to optimize the logic circuitry and the power stage to achieve the best possible performance. The DMOS output transistors can operate at supply voltages up to 42V and efficiently at high switching speeds. All the logic inputs are TTL, CMOS compatible. Each channel (half-bridge) of the device is controlled by a separate logic input, while a common enable controls both channels.

The integrated circuit L6203 is a full bridge driver for D.C motors; it can drive up to 48 volt with total RMS current up to 4 A outputs and has an operating frequency up to 100 KHz with high efficiency.

It is compatible with TTL logic circuit and has internal logic supply. This IC can optimize the logic circuitry and the power stage to achieve the best possible performance.

Figure 2.4     L6203 H-bridge

2.2.3.1 Pin connections for L6203

Figure 2.5   PIN connections for L6203

The logic drive shown in table:

Table 2.1 Logic control for l6203 IC

2.2.3.2 Circuit connections

Figure 2.6 L6203 circuit diagram

Figure 2.7 Driver board for L6203 and stepper motor

The transistors have an intrinsic diode between their source and drain that can operate as a fast freewheeling diode in switched mode applications.