BTF50060-1TEA_11 Datasheet, PDF(14/38 Page) Infineon Technologies AG – Smart High-Side Power Switch, One Channel

English

English German Russian Spanish Italian Polish Chinese Japanese Korean French Portuguese	Language :

BTF50060-1TEA_11 Datasheet, PDF (14/38 Pages) Infineon Technologies AG – Smart High-Side Power Switch, One Channel

◁

BTF50060-1TEA

Functional Description

5.1.3 Switching a Capacitive Load

A capacitive loadâs dominant characteristic is itâs inrush current. The BTF50060-1TEA can support inrush currents

up to IL(SC). If the inrush current reaches IL(SC), the device may detect a short circuit condition and switches OFF.

For a description of the short circuit protection mechanism, please refer to Chapter 5.3.1.

5.1.4 Inverse Load Current Operation

In case of a negative load current, e.g. caused by load operating as a generator, the device can not block a current

flowing through the intrinsic body diode. See Figure 13. The power stage of the device can be switched ON or

stays ON as long as VIN = HIGH, reaching the same RDS(ON) as for positive load currents, if no fault condition is

detected. In case of fault condition, the logic of the device will switch OFF the power stage and supply a fault signal

IIS(fault). Since the device can not block a negative load current (even under fault conditions), it can not protect itself

from overload condition. In the application, overload conditions, e.g. over temperature, must not occur during

inverse load current operation.

-IL(inv)

OUT

GND

Figure 13 Inverse load current operation

In ve r s.e m f

5.2

Input Circuit

The input circuitry is compatible with 3.3 and 5V micro controllers. If VIN is set to VIN = VIN(H) (VIN = HIGH), the

device will turn ON. See Figure 10 for the timings. If VIN is set to VIN = VIN(L) (VIN = LOW), the power stage of the

device will be turned OFF. The input circuitry has a hysteresis ÎVIN. The input circuitry is compatible with PWM

applications. Figure 14 shows the electrical equivalent input circuitry. The logic of the BTF50060-1TEA stays

active for a delay time tRESET after the switch OFF signal.

RIN

Figure 14 Input pin circuitry

GND

InputCircuitry.emf

Applying an input voltage of VIN > 20V (absolute maximum ratings exceeded!) may force the BTF50060-1TEA to

deactivate parts of the logic circuitry. This includes the undervoltage shutdown, the undervoltage restart delay, and

the analog sense function. In this case, also the short circuit shutdown threshold IL(SC) is set to typically 50A, and

Datasheet

Speed PROFETTM

Rev. 1.2, 2011-09-01

▷