L6204

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APPLICATION INFORMATION

RECIRCULATION

voltages less than 0.7 V and is clamped at a voltage depending on the characteristics of the source-drain

diode for greater voltages. Although the device is protected against cross conduction, current spikes can

appear on the current sense pin due to charge/discharge phenomena in the intrinsic source drain capac-

itances. In the application this does not cause any problems because the voltage created across the sense

resistor is usually much less than the peak value, although a small RC filter can be added if necessary.

POWER DISSIPATION (each bridge)

In order to achieve the high performance provided by the L6204 some attention must be paid to ensure

that it has an adequate PCB area to dissipate the heat. The first stage of any thermal design is to calculate

the dissipated power in the appl ication, for this example the half step operation shown in figure 7 is con-

sidered.

When an arm of the half bridge is turned on current begins to flow in the inductive load until the maximum

Figure 7.

In the commutation the energy dissipated is :

Where :

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- Obsolete

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