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L6910A L6910

Figure 3. High Side driver peak current. Vboot-Vphase = 12V (right) Vboot-Vphase = 5V (left)

Monitoring and Protections

The output voltage is monitored by means of pin FB. If it is not within ±10% (typ.) of the programmed value, the

powergood output is forced low.

The device provides overvoltage protection, when the voltage sensed on pin FB reaches a value 17% (typ.)

greater than the reference the OSC pin is forced high (3V typ.) and the lower driver is turned on as long as the

over-voltage is detected.

Overcurrent protection is performed by the device comparing the drop across the high side MOS, due to the

overcurrent protection this relationship must be satisfied:

CH1 = High Side Gate CH4 = Gate Current

CH1 = Low Side Gate CH4 = Gate Current

I

P

R

OCS

I

OCS

⋅

R

ds O N

---------------------------------

=