L9952XP STMicroelectronics, L9952XP Datasheet - Page 18

• Manufacturer Part Number: L9952XP
• Description: IC PWR MANAGEMENT SYST PWRSSO36
• Manufacturer: STMicroelectronics

Specifications of L9952XP

• Applications: Automotive
• Voltage - Supply: 6 V ~ 18 V
• Operating Temperature: -40°C ~ 150°C
• Mounting Type: Surface Mount
• Package / Case: PowerSSO-36 Exposed Bottom Pad
• Product: Fan / Motor Controllers / Drivers
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Supply: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Description
Note:
18/68
The watchdog is triggered by toggling the trigger bit (CR0, D19).
The active trigger window will be reset after each correct trigger write operation.
In case of reset (NReset low for 2ms) the trigger bit is set to “0”.
In case of a WD failure, the outputs (Lsx, Hsx, V2) are switched off and NReset is pulled low
for 2ms.
Writing to control register 0 without inverting the WD trigger bit is possible at any time.
Figure 4.
Power-on
LSD: Off (control bits set to ‚ 0 ')
Reset
HSD: Off (control bits remain
(Nreset =low for 2ms)
unchanged )
or exit Flash Mode
Reset
Wake-up event
Watchdog
t=200ms
Wake up event
(standby modes ,
for 200 ms
Watchdog
Flash Mode )
Inactive
V1 off
Go to standby mode or
Flash Mode (PWM2>9V)
Watchdog Failure (‚long
open window’ passed
Watchdog Failure
2ms
without TRIG=1
Doc ID 13518 Rev 5
I(V1)>1mA and ICMP=0
INH, LIN, SPI
8x WD Failure
Vbatstdby
Mode
HS and LS outputs are
‚long open window’
Watchdog active
(65ms nom)
WD Failures
with
8+7
off
HSD, LSD : according to
toggle trigger bit if wake-up
Set WD Trigger Bit = ‚1' or
non-inverting value to trigger
WD Trigger Bit = ‚0' or write
Watchdog active
Normal window
bit after wake-up from
from V1standby
V1standby mode
(10ms)
With
CR0
Set
Toggle WD Trigger Bit
Within nominal window
or Flash Mode (PWM2>9V)
Go to standby mode
L9952GXP