BTS443PT Infineon Technologies, BTS443PT Datasheet
BTS443PT
Specifications of BTS443PT
Related parts for BTS443PT
BTS443PT Summary of contents
Page 1
... Proportional load current sense (with defined fault signal during thermal shutdown) Application • Power switch with current sense diagnostic feedback for 12V and grounded loads • All types of resistive, capacitive and inductive loads (no PWM with inductive loads) • Replaces electromechanical relays, fuses and discrete circuits ...
Page 2
... Function Output to the load. The pin 1 and 5 must be shorted with each other especially in high current applications!*) Input, activates the power switch in case of short to ground Positive power supply voltage, the tab is shorted to this pin. Diagnostic feedback providing a sense current proportional to the load current ...
Page 3
... R SMD version, device on PCB Electrical Characteristics Parameter and Conditions -40°C...150° unless otherwise specified j bb Load Switching Capabilities and Characteristics On-state resistance (pin 3 to pin 1, Output voltage drop limitation at small load currents (Tab to pin 1,5) Nominal load current (Tab to pin 1,5) ISO Proposal: T =85° ...
Page 4
... I = Standby current Protection Functions Short circuit current limit (Tab to pin 1,5) V =8V, time until limitation max. 300µs ON Repetitive short circuit current limit, Output clamp (inductive load switch off (e.g. overvoltage) OUT bb ON(CL Thermal overload trip temperature Thermal hysteresis Reverse Battery ...
Page 5
... Current sense settling time to I positive input slope Overvoltage protection Input Required current capability of input switch Maximum input current for turn-off higher, the sense current is no longer proportional to the load current due to sense current ON saturation Not subject to production test, specified by design. ...
Page 6
Truth Table Normal operation Overload Short circuit to GND Overtemperature Short circuit Open load L = "Low" Level H = "High" Level Terms 3 V bIN PROFET ...
Page 7
Input circuit (ESD protection Z,IN V bIN ESD-Zener diode typ., max 15 mA; Current sense output Normal operation IS,fault ...
Page 8
... To minimise power dissipation at reverse battery operation, the summarised current into the IN and IS pin should be about 50mA. The current can be provided by using a small signal diode D in parallel to the input switch, by using a MOSFET input switch or by proper adjusting the current through R Since the current through R generates additional ...
Page 9
... R L > 0 Ω: · OUT(CL · L The device is not suitable for permanent PWM with inductive loads if active clamping occurs every cycle. Data Sheet Maximum allowable load inductance for a single switch off j,start = 150° Ω L[mH] 100 E Load i (t) L OUT · ...
Page 10
... S I IS,fault >= 2.5mA I L(lim) = 20A Data Sheet Figure 2a: Switching motors and lamps dV/dtoff V OUT t off t I slc(IS soff(IS) Sense current above I IS,fault can occur at very high inrush currents. Figure 2b: Switching an inductive load OUT Page PROFET ® BTS 443 Rev. 1.0, 2007-02 ...
Page 11
Figure 3a: Short circuit L(SCp ISfault Figure 4a: Overtemperature Reset if T < IS,fault I IS Auto Restart V OUT T j Data Sheet Figure 5a: Undervoltage ...
Page 12
Figure 6a: Current sense versus load current: [mA 2.0 1 Figure 6b: Current sense ratio k ILIS 8200 This range for the current sense ratio ...
Page 13
Package Outlines All dimensions in mm D-Pak-5 Pin: PG-TO252-5-11 Sales Code Green Product To meet the world-wide customer requirements for environmentally friendly products and to be compliant with government regulations the device is available as a green product. Green products ...
Page 14
Revision History Version Date Changes Rev. 1.0 2007-02-21 RoHS-compliant version of BTS443P Page 1, page 13: RoHS compliance statement and Green product feature added Page 1, page 13: Change to RoHS compliant package PG-TO252-5-11 Legal disclaimer updated Data Sheet Page ...
Page 15
... Infineon Technologies Office. Infineon Technologies Components may only be used in life-support devices or systems with the express written approval of Infineon Technologies failure of such components can reasonably be expected to cause the failure of that life-support device or system affect the safety or effectiveness of that device or system. Life support devices or systems are intended to be implanted in the human body support and/or maintain and sustain and/or protect human life ...