TS4999 datasheet(30/36 Pages) STMICROELECTRONICS

30 / 36 page

Application information

TS4999

30/36

Figure 61.

LC output filter with RC network

4.10

Short-circuit protection

The TS4999 includes an output short-circuit protection. This protection prevents the device

from being damaged when faults occur on the amplifier outputs.

When a channel is in operating mode and a short-circuit occurs between two outputs of the

channel or between an output and ground, the short-circuit protection detects this situation

and puts the appropriate channel into standby mode. To put the channel back into operating

mode, it is necessary to put the channel’s standby pin to logical LO and then back to logical

HI and wake-up the channel.

4.11

Thermal shutdown

The TS4999 device has an internal thermal shutdown protection mechanism to protect the

device from overheating in the event of extreme temperatures. The thermal shutdown

mechanism is activated when the device reaches 150° C. When the temperature decreases

to safe levels (around 135° C), the circuit switches back to normal operation.

Table 12.

Example of component selection

Component

RL = 4 Ω

RL = 8 Ω

μH / 1.4A

μH / 0.7A

μH / 1.4A

μH / 0.7A

μF / 10V

R22

Ω / 0.25W

from TS2007

LC Output Filter

OUT+

OUT-

RC network

TS4999 Datasheet(PDF) 30 Page - STMicroelectronics