L7987 datasheet(19/37 Pages) STMICROELECTRONICS

部件名	L7987

功能描述	Adjustable current limitation

PDF	37 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

标志

19 / 37 page

DocID025589 Rev 3

19/37

L7987

Functional description

Figure 9. Current limit and programming resistor

The minimum programmed current limit can't be lower than ISKIP = 0.5 A (typical), also in

case of foldback detection.

4.6

Overtemperature protection

It is recommended that the device never exceeds the maximum allowable junction

temperature. This temperature increase is mainly caused by the total power dissipated from

the integrated Power MOSFET.

To avoid any damage to the device when reaching high temperature, the L7987 device

implements a thermal shutdown feature: when the junction temperature reaches 170 °C

(typ.) the device turns off the Power MOSFET and shuts down.

When the junction temperature drops to 155 °C (typ.), the device restarts with a new soft-

start sequence.

L7987 数据表(PDF) 19 Page - STMicroelectronics