VNQ830 데이터 시트보기 (PDF) - STMicroelectronics

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VNQ830

Quad channel high-side driver

STMicroelectronics 

Application information

VNQ830

Example

For the following conditions:

VCCpeak = -100 V

Ilatchup ≥ 20 mA

VOHμC ≥ 4.5 V

5 kΩ ≤ Rprot ≤ 65 kΩ.

Recommended values are:

Rprot = 10 kΩ

3.4

Open load detection in off-state

t(s) 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

c microprocessor.

du The external resistor has to be selected according to the following requirements:

ro 1. No false open load indication when load is connected: in this case we have to avoid

P VOUT to be higher than VOlmin; this results in the following condition

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

le 2. No misdetection when load is disconnected: in this case the VOUT has to be higher than

so VOLmax; this results in the following condition RPU < (VPU - VOLmax) / IL(off2).

b Because Is(OFF) may significantly increase if Vout is pulled high (up to several mA), the pull-

O up resistor RPU should be connected to a supply that is switched OFF when the module is in

- standby.

t(s) Figure 25. Open-load detection in off-state

uc V batt.

VPU

rod VCC

Obsolete P INPUT

DRIVER

+

LOGIC

+

RPU

IL(off2)

OUT

STATUS

R

-

VOL

RL

GROUND

20/28

Doc ID 7390 Rev 5

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