l99pm62gxp STMicroelectronics, l99pm62gxp Datasheet - Page 39

• Manufacturer Part Number: l99pm62gxp
• Description: Power Management Ic With Lin And High Speed Can
• Manufacturer: STMicroelectronics

L99PM62GXP
3.4
Table 7.
The PWM 1 / 3 channels start a PWM period with the ON phase, while the PWM 2 / 4
channels start with the OFF phase. In this way it is possible to use the 4 PWM channels in a
phase shifted way.
The
Figure 21. Phase shifted PWM
Low-side driver outputs REL1, REL2
The outputs REL1, REL2 (R
loads.
The outputs provide an active output zener clamping (45 V typical) feature for the
demagnetization of the relay coil, even though a load dump condition exists.
For fail-safe reasons the relay drivers are linked with the fail safe operation: in case of
entering the fail safe mode, the relay drivers switches off and the SPI control bits are set to
default (i.e. driver is off).
The low-side drivers switch off in case of:
●
●
●
In case of overload or overtemperature (TSD1) condition, the drivers switches off. The
according status bit is latched and can be read and optionally cleared by SPI. The drivers
remain off until the status is cleared.
Figure 21
V
Overcurrent
Overtemperature with pre warning
S
High-side output
over and undervoltage
OUTHS
OUT4
PWM configuration for high-side outputs (continued)
shows this feature with a duty cycle of 25% for both PWM channels.
DSon
Doc ID 17639 Rev 3
= 2 Ω typical at 25 °C) are specially designed to drive relay
PWM 3 / PWM 4
PWM channel
PWM 4
Protection and diagnosis
Timer 1 / Timer 2
Internal timer
Timer 2
39/102