l99pm62gxp STMicroelectronics, l99pm62gxp Datasheet - Page 38

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

Protection and diagnosis
3.3
Note:
38/102
High-side driver outputs
The component provides a total of 4 high-side outputs Out1 to 4, (7 Ω typical at 25°C) to
drive e.g. LED's or hall sensors and 1 high-side output OUT_HS with 1 Ω typical at 25 °C).
The high-side outputs switch off in case of:
●
●
●
In case of overload or over temperature (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.
In case over/under voltage condition, the drivers is switched off. The according status bit is
latched and can be read and optionally cleared by SPI. If the Vlockout bit (Control Register
4) is set to ‘1’ the drivers remain off until the status is cleared. If the Vlockout bit is set to ‘0’
the drivers switches on automatically if the error condition disappears.
In case of open-load condition, the according status register is latched. The status can be
read and optionally cleared by SPI. The high-sides are not switched off.
For OUT_HS the auto recovery feature (OUTHSREC bit Control Register 4) can be enabled.
If this bit is set to ‘1’ the driver is automatically restart from a overload condition. This
overload recovery feature is intended for loads which have an initial current higher than the
over current limit of the output (e.g. Inrush current of cold light bulbs). During auto recovery
mode the over current status bit can not be read from SPI.
The device itself can not distinguish between a real overload and a non linear load like a
light bulb. A real overload condition can only be qualified by time. As an example, the micro
controller can switch on light bulbs by setting the over current recovery bit for the first 50ms.
After clearing the recovery bit, the output is automatically disabled if the overload condition
still exists.
In case of a fail safe condition, the high-side drivers are switched off. The control bits are set
to default values. (except OUT3/FSO if it is used as a high-side driver output)
The maximum voltage and current applied to the high-side outputs is specified in
Section 5.1: Absolute maximum
order to respect these limits under application conditions.
Each high-side driver can be driven whether with a PWM signal or with a internal Timer. See
Table
For more Details please refer to
Table 7.
a. Except OUT3 when configured as FSO.
V
Overcurrent
Overtemperature (TSD1) with pre warning
7.
S
High-side output
over and undervoltage
OUT1
OUT2
OUT3
PWM configuration for high-side outputs
Doc ID 17639 Rev 3
Section 6.2: SPI
rating. Appropriate external protection may be required in
PWM channel
PWM 1
PWM 2
PWM 3
(a)
registers.
Internal timer
Timer 1
Timer 2
L99PM62GXP
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