8.3.4 Output Drive

The OPAx354 output stage supplies a continuous output current of ±100 mA and yet provide approximately
2.7 V of output swing on a 5-V supply, as shown in Figure 30. For maximum reliability, TI does not recommend running a continuous DC current in excess of ±100 mA. See the typical characteristic curves, Output Voltage Swing vs Output Current (Figure 20 and Figure 22). For supplying continuous output currents greater than ±100 mA, the OPAx354 may be operated in parallel, as shown in Figure 31.

Figure 30. Laser Diode Driver

The OPAx354 provides peak currents up to 200 mA, which corresponds to the typical short-circuit current. Therefore, an on-chip thermal shutdown circuit is provided to protect the OPAx354 from dangerously high junction temperatures. At 160°C, the protection circuit shuts down the amplifier. Normal operation resumes when the junction temperature cools to below 140°C.

Figure 31. Parallel Operation