ST L9951, L9951XP User Manual

L9951

L9951XP

Rear door actuator driver

Features

	Type	Outputs(1)	Ron(2)	IOUT	VS
		OUT1	150 mΩ	7.4 A
	L9951	OUT2	200 mΩ	5 A
		OUT3	200 mΩ	5 A	28 V
	L9951XP
		OUT4	800 mΩ	1.25 A
		OUT5	800 mΩ	1.25 A

1.See block diagram.

2.Typical values.

■One half bridge for 7.4 A load (Ron = 150 mΩ)

■Two half bridges for 5 A load (Ron = 200 mΩ)

■Two highside drivers for 1.25 A load (Ron = 800 mΩ)

■Programmable softstart function to drive loads with higher inrush currents (i.e.current > 7.4A, >5A, >1.25A)

■Very low current consumption in standby mode (IS < 3µA, typ. Tj ≤ 85°C)

■All outputs short circuit protected

■Current monitor output for all highside drivers

■All outputs over temperature protected

■Open-load diagnostic for all outputs

■Overload diagnostic for all outputs

■Programmable PWM control of all outputs

■Charge pump output for reverse polarity protection

PowerSO-36 PowerSSO-36

Applications

■Rear door actuator driver with bridges for door lock and safe lock and two 5W or 10W - light bulbs.

Description

The L9951 and L9951XP are microcontroller driven, multifunctional rear door actuator drivers for automotive applications. Up to two DC motors and two grounded resistive loads can be driven with three half bridges and two hide side drivers. The integrated standard serial peripheral interface (SPI) controls all operation modes (forward, reverse, brake and high impedance). All diagnostic information is available via the SPI.

Table 1.	Device summary
	Package		Order codes
		Tube		Tape and reel
	PowerSO-36	L9951		L9951TR
	PowerSSO-36	L9951XP		L9951XPTR
May 2010		Doc ID 14173 Rev 8	1/36

www.st.com

Contents	L9951 / L9951XP

Contents

1	Block diagram and pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . .		. 6
2	Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		. 9
	2.1	Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	9
	2.2	ESD protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	9
	2.3	Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	9
	2.4	Temperature warning and thermal shutdown . . . . . . . . . . . . . . . . . . . . . .	10
	2.5	Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	10
	2.6	SPI - electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	14
3	Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		19
	3.1	Dual power supply: VS and VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	19
	3.2	Standby - mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	19
	3.3	Inductive loads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	19
	3.4	Diagnostic functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	19
	3.5	Over-voltage and under-voltage detection . . . . . . . . . . . . . . . . . . . . . . . .	20
	3.6	Temperature warning and thermal shutdown . . . . . . . . . . . . . . . . . . . . . .	20
	3.7	Open-load detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	20
	3.8	Over load detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	20
	3.9	Current monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	20
	3.10	PWM input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	21
	3.11	Cross-current protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	21

3.12Programmable softstart function to drive loads with higher inrush current 21

4	Functional description of the SPI . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		22
	4.1	Serial Peripheral Interface (SPI) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	22
	4.2	Chip Select Not (CSN) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	22
	4.3	Serial Data In (DI) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	22
	4.4	Serial Data Out (DO) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	23
	4.5	Serial clock (CLK) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	23
	4.6	Input data register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	23
	4.7	Status register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	23

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L9951 / L9951XP			Contents
	4.8	Test mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . . 23
5	Packages thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		. . . . 28
6	Package and packing information . . . . . . . . . . . . . . . . . . . . . . . . .		. . . . 29
	6.1	ECOPACK® packages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . 29
	6.2	PowerSO-36™ package information . . . . . . . . . . . . . . . . . . . . . . . .	. . . . 29
	6.3	PowerSSO-36™ package information . . . . . . . . . . . . . . . . . . . . . . .	. . . . 31
	6.4	PowerSO-36™ packing information . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . 32
	6.5	PowerSSO-36™ packing information . . . . . . . . . . . . . . . . . . . . . . . .	. . . . 34
7	Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		. . . . 35

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List of tables	L9951 / L9951XP

List of tables

Table 1. Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Table 2. Pin definitions and functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Table 3. Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Table 4. ESD protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Table 5. Thermal data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Table 6. Temperature warning and thermal shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Table 7. Supply. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Table 8. Overvoltage and undervoltage detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Table 9. Current monitor output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Table 10. Charge pump output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Table 11. OUT 1 - OUT 5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Table 12. Delay time from standby to active mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Table 13. Inputs: CSN, CLK, PWM1/2 and DI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Table 14. DI timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Table 15. DO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Table 16. DO timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Table 17. EN, CSN timing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Table 18. Test mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 Table 19. SPI - Input data and status register 0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 Table 20. SPI - Input data and status register 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 Table 21. PowerSO-36™ mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 Table 22. PowerSSO-36™ mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 Table 23. Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

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L9951 / L9951XP	List of figures

List of figures

Figure 1. Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Figure 2. Configuration diagram (top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Figure 3. SPI - transfer timing diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Figure 4. SPI - input timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Figure 5. SPI - DO valid data delay time and valid time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Figure 6. SPI - DO enable and disable time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Figure 7. SPI - driver turn-on/off timing, minimum CSN HI time . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Figure 8. SPI - timing of status bit 0 (fault condition) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Figure 9. Example of programmable softstart function for inductive loads . . . . . . . . . . . . . . . . . . . . 21 Figure 10. Packages thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 Figure 11. PowerSO-36™ package dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Figure 12. PowerSSO-36™ package dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 Figure 13. PowerSO-36TM tube shipment (no suffix) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 Figure 14. PowerSO-36TM tape and reel shipment (suffix “TR”) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 Figure 15. PowerSSO-36TM tube shipment (no suffix). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 Figure 16. PowerSSO-36TM tape and reel shipment (suffix “TR”) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

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Block diagram and pin description	L9951 / L9951XP

1 Block diagram and pin description

Figure 1. Block diagram

* Note: Value of capacitor has to be choosen carefully to limit the VS voltage below absolute maximum ratings in case of an unexpected

freewheeling condition of inductive loads (e.g. TSD, POR)

	*
VREG	100µF
	100nF

Reverse	VBAT
Polarity
Protection	100k
10k
VS	CP

	EMC		Charge		OUT1
	Optimization		Pump
VCC		+10
	100		VCC			Lock
				Diagnostic&Interface	OUT2
			SPI Interface			M
	100nF
	** 1k	DI				Safe Lock
					OUT3	M
	** 1k	DO
		CLK
	** 1k
	** 1k	CSN			OUT4	Exterior Light
	**1k	EN		Driver	OUT5
µC						Safety Light
	**1k CM / PWM			MUX	5
				GND ** Note: Resistors between µC and L9951 are recommended to limit currents
					for negative voltage transients at VBAT (e.g. ISO type 1 pulse)
					+ Note: Using a ferrite instead of 10ohm will additionally improve EMC behavior

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L9951 / L9951XP			Block diagram and pin description
	Table 2.	Pin definitions and functions
	Pin	Symbol	Function
			Ground .
	1, 18, 19,	GND	Reference potential.
	36		Note: For the capability of driving the full current at the outputs all pins of
			GND must be externally connected.
			Power supply voltage (external reverse protection required).
	6, 7, 14,		For EMI reason a ceramic capacitor as close as possible to GND is
	15, 23, 24,	VS	recommended.
	29, 32		Note: for the capability of driving the full current at the outputs all pins of
			VS must be externally connected.
			Half-bridge output 1.
			The output is built by a high side and a low side switch, which are
			internally connected. The output stage of both switches is a power
	3, 4, 34	OUT1	DMOS transistor. Each driver has an internal reverse diode (bulk-drain-
			diode: high side driver from output to VS, low side driver from GND to
			output). This output is over-current and open-load protected.
			Note: for the capability of driving the full current at the outputs all pins of
			OUT1 must be externally connected.
			Serial data input.
	8	DI	The input requires CMOS logic levels and receives serial data from the
			microcontroller. The data is a 16bit control word and the least significant
			bit (LSB, bit 0) is transferred first.
			Current monitor output/PWM input.
			Depending on the selected multiplexer bits (bit 9, 10, 11) of Input Data
			Register this output sources an image of the instant current through the
			corresponding high side driver with a ratio of 1/10.000. This pin is
	9	CM/PWM	bidirectional. The microcontroller can overwrite the current monitor signal
			to provide a PWM input for all outputs.
			Testmode:
			If CSN is raised above 7.5V the device will enter the test mode. In test
			mode this output can be used to measure some internal signals (see
			Table 18).
			Chip select not input / Testmode .
	10	CSN	This input is low active and requires CMOS logic levels. The serial data
			transfer between L9951 and micro controller is enabled by pulling the
			input CSN to low level. If an input voltage of more than 7.5V is applied to
			CSN pin the L9951 will be switched into a test mode.
			Serial data output .
	11	DO	The diagnosis data is available via the SPI and this tristate-output. The
			output will remain in tristate, if the chip is not selected by the input CSN
			(CSN = high).
			Logic supply voltage .
	12	VCC	For this input a ceramic capacitor as close as possible to GND is
			recommended.
			Serial clock input .
	13	CLK	This input controls the internal shift register of the SPI and requires
			CMOS logic levels.

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Block diagram and pin description			L9951 / L9951XP
	Table 2.	Pin definitions and functions (continued)
	Pin	Symbol	Function
			Half-bridge output 2 (see OUT1 - pin 3, 4).
	16, 17	OUT2	Note: for the capability of driving the full current at the outputs all pins of
			OUT2 must be externally connected.
			Half-bridge output 3 (see OUT1 - pin 3, 4).
	20, 21	OUT3	Note: for the capability of driving the full current at the outputs all pins of
			OUT3 must be externally connected.
			Charge Pump Output .
	26	CP	This output is provided to drive the gate of an external n-channel power
			MOS used for reverse polarity protection (see Figure 1).
			Enable input.
	27	EN	If Enable input is forced to GND the device will enter Standby-Mode. The
			outputs will be switched off and all registers will be cleared
			High side driver output 4, 5 .
			The output is built by a high side switch and is intended for resistive
	33, 35	OUT4, OUT5	loads, hence the internal reverse diode from GND to the output is
			missing. For ESD reason a diode to GND is present but the energy which
			can be dissipated is limited. The high side driver is a power DMOS
			transistor with an internal reverse diode from the output to VS (bulk-
			drain-diode). The output is over-current and open-load protected.

Figure 2. Configuration diagram (top view)

GND	1		36	GND
N.C.	2		35	OUT5
OUT1	3		34	OUT1
OUT1	4		33	OUT4
N.C.	5		32	VS
VS	6		31	NN.C.C..
VS	7		30	N.C.
DI	8	Chip	29	VS.
CM/PWM	9		28	N.C.
CSN	10		27	EN
DO	11		26	CP
VCC	12		25	N.C.
CLK	13		24	VS
VS	14		23	VS
VS	15		22	N.C.
OUT2	16	Leadframe	21	OUT3
OUT2	17		20	OUT3
GND	18		19	GND

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L9951 / L9951XP	Electrical specifications

2 Electrical specifications

2.1Absolute maximum ratings

Stressing the device above the rating listed in the “Absolute maximum ratings” table may cause permanent damage to the device. These are stress ratings only and operation of the device at these or any other conditions above those indicated in the operating sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Refer also to the STMicroelectronics sure program and other relevant quality document

Table 3.	Absolute maximum ratings
	Symbol	Parameter	Value	Unit
	VS	DC supply voltage	-0.3 to 28	V
		Single pulse tmax < 400ms	40	V
	VCC	Stabilized supply voltage, logic supply	-0.3 to 5.5	V
VDI,VDO,VCLK,VCSN,VEN		Digital input / output voltage	-0.3 to VCC + 0.3	V
	VCM	Current monitor output	-0.3 to VCC + 0.3	V
	VCP	Charge pump output	-25 to VS + 11	V
	IOUT1,2,3	Output current	±10	A
	IOUT4,5	Output current	±5	A

2.2ESD protection

Table 4.	ESD protection
	Parameter	Value	Unit
	All pins	± 4(1)	kV
	Output pins: OUT1 - OUT5	± 8(2)	kV

1.HBM according to CDF-AEC-Q100-002.

2.HBM with all unzapped pins grounded.

2.3Thermal data

Table 5.	Thermal data
Symbol	Parameter	Value	Unit
Tj	Operating junction temperature	-40 to 150	°C

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Electrical specifications	L9951 / L9951XP

2.4Temperature warning and thermal shutdown

Table 6.	Temperature warning and thermal shutdown
Symbol	Parameter		Min.	Typ.	Max.	Unit
TjTW ON	Temperature warning threshold junction	Tj			150	°C
	temperature	increasing
TjTW OFF	Temperature warning threshold junction	Tj	130			°C
	temperature	decreasing
TjTW HYS	Temperature warning hysteresis			5		°K
TjSD ON	Thermal shutdown threshold junction	Tj			170	°C
	temperature	increasing
TjSD OFF	Thermal shutdown threshold junction	Tj	150			°C
	temperature	decreasing
TjSD HYS	Thermal shutdown hysteresis			5		°K

2.5Electrical characteristics

VS = 8 to 16 V, VCC = 4.5 to 5.3 V, Tj = - 40 to 150 °C, unless otherwise specified.

The voltages are referred to GND and currents are assumed positive, when the current flows into the pin.

Table 7.	Supply
Symbol	Parameter	Test condition	Min.	Typ.	Max.	Unit
VS	Operating supply voltage		7		28	V
	range
		VS = 13V, VCC = 5.0V
	VS DC supply current	active mode		7	20	mA
		OUT1 - OUT5 floating
IS		VS = 13V, VCC = 0V
		standby mode
				3	10	µA
	VS quiescent supply current	OUT1 - OUT5 floating
		Ttest =-40°C, 25°C
		Ttest = 130°C		6	20	µA

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L9951 / L9951XP				Electrical specifications
	Table 7.	Supply (continued)
	Symbol	Parameter	Test condition	Min.	Typ.	Max.	Unit
			VS = 13V, VCC = 5.0V
		VCC DC supply current	CSN = VCC		1	3	mA
			active mode
	ICC
			VS = 13V, VCC = 5.0V
		VCC quiescent supply	CSN = VCC		1	3	µA
		current	standby mode
			OUT1 - OUT5 floating
			VS = 13V, VCC = 5.0V
	IS + ICC	Sum quiescent supply	CSN = VCC		7	23	µA
		current	standby mode
			OUT1 - OUT5 floating

Table 8.	Overvoltage and undervoltage detection
Symbol	Parameter	Test condition	Min.	Typ.	Max.	Unit
VSUV ON	VS UV-threshold voltage	VS increasing	6.0		7.2	V
VSUV OFF	VS UV-threshold voltage	VS decreasing	5.4		6.5	V
VSUV hyst	VS UV-hysteresis	VSUV ON - VSUV OFF		0.55		V
VSOV OFF	VS OV-threshold voltage	VS increasing	18		24.5	V
VSOV ON	VS OV-threshold voltage	VS decreasing	17.5			V
VSOV hyst	VS OV-hysteresis	VSOV OFF - VSOV ON		0.5		V
VPOR OFF	Power-on-reset threshold	VCC increasing			4.4	V
VPOR ON	Power-on-reset threshold	VCC decreasing	3.1			V
VPOR hyst	Power-on-reset hysteresis	VPOR OFF - VPOR ON		0.3		V

Table 9.	Current monitor output
Symbol	Parameter	Test condition	Min.	Typ.	Max.	Unit
VCM	Functional voltage range	VCC = 5V	0		4	V
	Current monitor output
ICM,r	ratio:	0V ≤ VCM ≤ 4V, VCC=5V		1:10000		-
	ICM / IOUT1,2,3,4,5
		0V ≤ VCM≤ 4V,
		VCC=5V,
		IOUT1-5,low =500mA		4% +	8% +
ICM acc	Current monitor accuracy	IOUT1,high =6A				-
				1%FS	2%FS
		IOUT2,3,high =4.9A
		IOUT4,5,high =1.2A
		(FS=full scale=600 μA)

Doc ID 14173 Rev 8

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