MC33816 with ADC to sense Vsrc to gnd voltage

[loheswaritkumar]

We would like to know whether an ASIC is available similar to MC33816 with ADC to sense source to ground voltage(ADC to sense S_HSX). As of knowledge, S_HSX voltage will be compared with specified voltage threshold. But our intention is to know whether we have ADC instead of comparator.

[xiangjun_rong]

Hi,Loheswari,

sorry for the delay.

Regarding the S_HSx pin, as you know, the Solenoid device is an inductance device, when the MOSFET turn off, the top end of the Solenoid device may have very low voltage to keep the current which flow through the Solenoid, in the case, the capacitor connected between B_HSx and S_HSx is charged. later, when you would like to turn on the top MOSFET, the capacitor can provide power  so that the G_HSx is high enough compared with S_HSx, which can guarantee the top MOSFET  turn on reliably. In general, it is unnecessary to measure the S_HSx voltage by any ADC converter.

The voltage between VSENSEPx and VSENSENx is required to be tested to protect the MOSFET, the voltage is compared with an internal comparator to generate signal to MCU.

Pls refer to Figure 1. MC33816 Simplified Application Diagram in  MC33816.pdf.

Hope it can help you.

BR

Xiangjun Rong