Datasheet TLE6280GP

Typ. Boostrap voltage vs. Duty Cycle

Conditions:

Parameter:

0

2

4

6

8

10

12

14

0

10203040506070

8090

100

Duty Cycle [%]

1.5µF / 220nF

3µF / 440nF

4.5µF / 660nF

Fig. 13: Typ. bootstrap voltage V(BHx)-V(SHx);

duty cycle of 1 half-bridge = 50%; duty cycle of the other

2 halfbridges variable

0

2

4

6

8

10

12

14

0

10203040506070

8090

100

Duty Cycle [%]

1.5µF / 220nF

3µF / 440nF

4.5µF / 660nF

Fig. 14: Typ. bootstrap voltage V(BHx)-V(SHx);

duty cycle of 1 half-bridge = 0%; duty cycle of the other 2

halfbridges variable

Remark:

The reachable duty cycle depends on the used PWM patterns. To achieve an even higher duty cycle, run it for

some periods and reduce the duty cycle only for 1 period down to 90% to recharge the bootstrap capacitors.

20

2004-03-31