VND810MSP-E View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

VND810MSP-E

DOUBLE CHANNEL HIGH SIDE DRIVER

STMicroelectronics 

VND810MSP-E

Recommended Rprot value is 10kΩ.

OPEN LOAD DETECTION IN OFF STATE

Off state open load detection requires an external pull-up

resistor (RPU) connected between OUTPUT pin and a

positive supply voltage (VPU) like the +5V line used to

supply the microprocessor.

The external resistor has to be selected according to the

following requirements:

1) no false open load indication when load is connected:

in this case we have to avoid VOUT to be higher than

VOlmin; this results in the following condition

VOUT=(VPU/(RL+RPU))RL<VOlmin.

Figure 9. Open Load Detection in Off State

2) no misdetection when load is disconnected: in this

case the VOUT has to be higher than VOLmax; this

results in the following condition RPU<(VPU–VOLmax)/

IL(off2).

Because Is(OFF) may significantly increase if Vout is

pulled high (up to several mA), the pull-up resistor RPU

should be connected to a supply that is switched OFF

when the module is in standby.

The values of VOLmin, VOLmax and IL(off2) are available in

the Electrical Characteristics section.

INPUT

STATUS

V batt.

VPU

VCC

RPU

DRIVER

+

LOGIC

IL(off2)

+

R

-

OUT

VOL

RL

GROUND

10/20

Share Link: