5

Device description

The STDRIVE101 is a low voltage gate driver for three-phase power stages with integrated linear regulator.

The device supply voltage is applied to VS pin. The VS is also used both as input voltage of 12 V LDO linear

regulator and to supply some internal circuitries, including the VDS monitoring protection reference voltage for the

high-side driver.

The power stage voltage (VM in Figure 1) must be equal or lower than VS voltage. If the VM voltage exceeds the

VS voltage, the device is damaged due to the violation of OUT pins absolute maximum rating as reported in

Table 1.

If a VM voltage lower than VS is used, the VDS monitoring protection cannot be used (refer to dedicated

Section 5.6 ).

5.1

Gate drivers’ characteristics

The STDRIVE101 integrates a triple half-bridge gate driver able to drive N-channel power MOSFETs. The high-

side section is supplied by a bootstrapped voltage technique with integrated bootstrap diode.

Figure 8. Gate drivers’ outputs characteristics in UVLO conditions

The device is designed to operate using VS as the supply voltage of the external power stage (i.e. motor supply

voltage). For this reason, the AMR rating of the OUTx pins is strictly related to the VS value and, more generally, it

is not possible to bias the OUT pins when the VS supply is not present (i.e. floating or shorted to ground).

5.2

12 V LDO linear regulator

The device integrates a LDO linear regulator generating 12 V output starting from the VS supply. The regulator is

disabled during standby mode.

STDRIVE101

Device description

DS13472 - Rev 1

page 13/32