Figure 4. Under voltage and over voltage detection

Table 10. Under voltage and over voltage parameters

Symbol

Parameter

Test condition

Min

Typ

Max

Unit

Note

UVth,hl

Undervoltage threshold

-

0.95

1

1.05

V

UV

UVth,lh

Undervoltage threshold

-

1.14

1.2

1.26

V

UV

UV,flt

UV filter time

Guaranteed by scan

-

-

100

μs

-

OVth,lh

Overvoltage threshold

-

1.14

1.2

1.26

V

OV

OVth,hl

Overvoltage threshold

-

0.95

1

1.05

V

OV

OV,flt

OV filter time

Guaranteed by scan

-

-

10

μs

-

UV,leak

UV leakage

-

-

-

1

μA

UV

OV,leak

OV leakage

-

-

-

1

μA

OV

Figure 5. OV and UV - VB diagnostic simplified block diagram

User needs to size R1, R2, R3 in order to define proper detection values on VB (depending on, most of all, if

12 V or 24 V systems are used), considering that internal circuitry detects undervoltage or overvoltage conditions,

when correspondent pins are equal to the threshold values summarized in Table 10.

STPM801

Functional behavior in detail

DS13990 - Rev 2

page 12/38