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PDF L9952GXP Data sheet ( Hoja de datos )

Número de pieza L9952GXP
Descripción Power management system IC
Fabricantes STMicroelectronics 
Logotipo STMicroelectronics Logotipo



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L9952GXP
Power management system IC
Features
Two 5V low-drop voltage regulators (250mA,
100mA continuous mode
Low stand-by current: VBAT stby, 7µA; ,V1 stby,
45µA, (75µA in cycl. sense)
Window watchdog and fail-safe output
Interrupt output
Wake-up logic with cyclic contact monitoring
LIN 2.1 compliant (SAEJ2602 compatible)
transceiver
24 bit SPI interface for mode control and
diagnostic
Output drivers
4 High side drivers for e.g. LED or HALL
(RDSon,typ = 7 Ω )
1 High side driver Out_HS ( RDSon,typ = 1 Ω )
2 Relay drivers ( RDSon,typ = 2 Ω )
Outputs are short circuit protected
2 Op amp's for current sensing in GND return
lines
Temperature warning and thermal shutdown
PowerSSO-36
Applications
Automotive ECU’ s such as door zone and
body control modules.
Description
The L9952GXP is a power management system
IC containing two low drop regulators with
advanced contact monitoring and additional
peripheral functions.
The integrated standard serial peripheral interface
(SPI) controls all L9952GXP operation modes
and provides driver diagnostic functions.
Table 1. Device summary
Package
PowerSSO-36
Tube
L9952GXP
Order codes
Tape and reel
L9952GXPTR
July 2009
Doc ID 13518 Rev 5
1/68
www.st.com
1
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1 page




L9952GXP pdf
L9952GXP
List of tables
List of tables
Table 1.
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Table 49.
Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Pins definitions and functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Functional overview (truth table). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
ESD protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Operating junction temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Temperature warning and thermal shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Thermal parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Supply and supply monitoring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Oscillator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Power-on Reset (Vs) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Voltage regulator V1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Voltage regulator V2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Reset generator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Watchdog . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
High side outputs (Out_HS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
High side outputs (OUT 1..4) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Relay drivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Wake up inputs(WU1...WU4) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Wake up input (INH) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
LIN receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
LIN DC parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
LIN transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
LIN timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
LIN DC values. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Operational amplifier. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
SPI (Input CSN) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Inputs: CLK, DI, PWM 1, PWM 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Input PWM2 Vth for flash mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
DI timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
DO, FSO, Digout3,4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
DO timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
CSN timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
SPI registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Control register 0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Configuration bit HSxx . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Configuration bit OUT_HSx . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Configuration bit RELx . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Configuration bit On_V2x . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Configuration bit TRIG, GO_VBAT, GO_V1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Control register 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Configuration bit Wx . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Configuration bit Ux . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Configuration bit Lx . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Configuration bit Txx . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Configuration bit INT_enable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Control register 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Configuration bit OLT_HSx, VSLOCK Out, O_HS_REC, LINPU and TXD_TOUT. . . . . . . 59
Doc ID 13518 Rev 5
5/68

5 Page





L9952GXP arduino
L9952GXP
2 Description
Description
2.1
2.1.1
2.1.2
Voltage regulator
The L9952GXP contains 2 independent and fully protected low drop voltage regulators,
which are designed for very fast transient response.
The output voltage is stable with loads capacitors > 220nF.
Voltage regulator: V1
The voltage regulator V1 provides 5V supply voltage and up to 250mA continuous load
current for the external digital logic (micro controller, CAN transceiver ...). In addition the
regulator V1 drives the L9952GXP internal 5V loads. The voltage regulator is protected
against overload and over-temperature. An external reverse current protection has to be
provided by the application circuitry to prevent the output capacitor from being discharged
by negative transients or low input voltage. The output voltage precision is better than +/-2%
(incl. temperature drift and line-/load regulation) for operating mode; respectively +/-3%
during low current mode. Current limitation of the regulator ensures fast charge of external
bypass capacitors. The output voltage is stable for ceramic load capacitors > 220nF.
If device Temperature exceeds TSD1 threshold, all outputs (Hsx, Lsx, V2, LIN) will be
deactivated except V1. Hence the micro controller has the possibility for interaction or error
logging. In case of exceeding TSD2 threshold (TSD2>TSD1), also V1 will be deactivated
(see state chart Fig. 3.1: “Protection and diagnosis”). A timer is started and the voltage
regulator is deactivated for tTSD = 1sec. During this time, all other wakeup sources (CAN,
LIN, and WU1...4) are disabled. After 1 sec, the voltage regulator will try to restart
automatically. If TSD2 occurs within one minute and for 8 consecutive times, the L9952GXP
enters the VBAT - standby mode.
In case of short to GND at “V1” after initial turn on (V1 < 2V for at least 4ms) the L9952GXP
enters the VBAT - standby mode. Reactivation (wake-up) of the device can be achieved with
signals from CAN, LIN, WU1..4, SPI.
Voltage regulator: V2
The voltage regulator V2 supplies additional 5V loads (e.g. Logic components, external
sensors, external potentiometers). The continuous load current is 50mA. The regulator
provides accuracy better than + 3% @ 50mA (4% @ 100mA) load current.
In case of short to GND at “V2” after initial turn on (V2 < 2V for at least 4ms) the V2
regulator is switched off. Micro processor has to send a clear command to reactivate the V2
regulator.
V2 is protected against:
Overload
Over temperature
Short circuit (short to ground and battery supply voltage)
Reverse biasing
Doc ID 13518 Rev 5
11/68

11 Page







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