L9300 datasheet(67/178 Pages) STMICROELECTRONICS

67 / 178 page

PUMP_PWM_Duty_Cycle

Duty cycle

…

127

99,219 %

128

100 %

…

255

100 %

The pump pre–driver has a VDS monitoring that is used to protect the external FET in case of short circuit to

ground. Through PUMP_VDS_PGM1 and PUMP_VDS_PGM2 SPI configuration bits four different VDS

thresholds are programmable.

In case of short circuit detection the pump pre-driver is switched off, a dedicated diagnostic bit is set and, if

programmed, the GPO is triggered. The fault configuration is latched and it is cleared on SPI read, once the fault

is cleared the pump pre-driver is automatically turned on keeping duty cycle and frequency information.

Figure 40. Pump motor concept

GADG0308171621PS

10.3.2

Pump pre-driver electrical characteristics

5.5V ≤ VBATP ≤ 19V; 5.5V ≤ PD1D ≤ 19V; -40°C ≤ Tj ≤ 175°C unless otherwise noticed. All voltages refer to GND

pin.

Table 42. Pump pre-driver electrical characteristics

Symbol

Parameter

Test condition

Min Typ Max Unit

Pump Pre-driver

PWM frequency

Application note

0.5

kHz

Ext. N-ch gate charge

Application note

PD1_ON

PD1 ON voltage

PD1G – PD1S

PD1G, PD1S

L9300

Valve drivers

DS12258 - Rev 5

page 67/178

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