5.1.4

Diagnostic in STAND-BY

STG detection is also present in standby mode, with a different filter time. When a short is detected, the FLT pin is

asserted low and the MOSFET driving signal HGATE/DGATE are turned off.

OVC diagnostic is also present in standby mode, but only HV comparators work and without retry function. When

OVC is detected the FLT pin is asserted low and the MOSFET driving signals HGATE/DGATE are turned off.

OVC and STG diagnostics work in OR condition, as shown in Figure 12.

Figure 12. Overcurrent and short to GND during standby

Table 22. Overcurrent and short to GND parameters in standby mode

Symbol

Parameter

Test condition

Min Typ Max Unit

Note

OC_HV_th_stand-by

Overcurrent threshold

(VSENSE-VOUT), VOUT > STG

threshold

-

22.5 27.5

35

mV SENSE, OUT

OC_HV_stand-by_flt

Overcurrent filter time

Guaranteed by scan

80

-

100

μs

-

OC_HV_fast_stand-by_th

Overcurrent threshold

(VSENSE-VOUT), VOUT > STG

threshold

-

40

50

60

mV SENSE, OUT

OC_HV_fast_stand-by_flt Overcurrent filter time

Guaranteed by scan

and design

1

-

3

μs

-

STG_flt

Short to ground filter time

Guaranteed by scan

and design

1

-

3

μs

-

CP_UV_flt

CP undervoltage filter time

Guaranteed by scan

0.9

-

1.2

ms

-

STPM801

STAND-BY behavior in detail

DS13990 - Rev 2

page 24/38