Data Sheet TLE6284G

Data Sheet

11

Rev 2.3 2007-01-11

Estimation of power loss within the Driver IC

The power loss within the Driver IC is strongly dependent on the use of the driver and the

external components. Nevertheless a rough estimation of the worst case power loss is pos-

sible. Worst case calculation is:

With:

n

= Number of switched MOSFETs

const = Constant considering some leakage current in the driver (about 1.2)

= Voltage at Vs

This value can be reduced dramatically by usage of external gate resistors.

Conditions :

Number of switched MOSFET n = 2

0

0,1

0,2

0,3

0,4

0,5

0,6

0,7

0,8

0

10

203040

5060

PWM Frequency (kHz)

Vs = 8V

Vs = 14V

Vs = 18V

0

0,1

0,2

0,3

0,4

0,5

0,6

0,7

0,8

0

102030

4050

60

PWM Frequency (kHz)