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BTS6123B

Smart High-Side Power Switch PROFET One Channel, 10 mΩ

Infineon Technologies 

Smart High-Side Power Switch

BTS 6123B

Power Stages

4.1.2 Output On-State Resistance

The on-state resistance RDS(ON) depends on the supply voltage as well as the junction

temperature Tj. Figure 6 shows these dependencies for the typical on-state resistance.

The on-state resistance in reverse polarity mode is described in Section 4.2.3.



5 21

PΩ





Vbb = 12 V

5 21

W\S

PΩ



Tj = 25°C

W\S







    ƒ& 

7M



     9 

9 EE

Figure 6 Typical On-State Resistance

At small load currents the resistance is artificially increased to improve current sense

accuracy. Therefore the forward voltage drop VON at small load currents is no more

proportional to the load current IL , but is controlled by an internal “two level controller”

to remain clamped to a defined value VON(NL). Figure 7 shows the dependency for a

typical device.

Data Sheet

11

V1.0, 2005-12-15

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