ST L9390 User Manual

Features

■ Four low side switched output drivers with

0.1Ω R

ds,ON

at 25°C

Possibly configurable as PWM controlled adding external freewheeling diodes

■ Two low side PWM controlled output drivers

with 0.1Ω R

at 25°C and integrated active

ds,ON

freewheeling diodes

■ Six low side current controlled output drivers

with 0.16Ω R

at 25°C and integrated

ds,ON

active freewheeling diodes

Current accuracy: –10% (I

–6% (I

■ All outputs with integrated 35V zener clamp

■ Five pin SPI port (four standard pins plus

< 800mA)

load

> 800mA)

load

additional SPI enable input pin)

■ Six serial high speed input for output control

■ High level diagnostic, including Silent Valve

Driver Test

■ Direct disable of outputs with an external pin

■ Programmable jitter frequency of PWM and

current controlled outputs

■ TQFP100 exposed pad package

Description

The L9390 is a twelve output low side valve driver designed for use in an ABS/ESP vehicle system. All outputs are PWM configurable, while six out of twelve are current regulated. Each of the twelve outputs is open drain configured and has a built-in 35V clamp. Eight of the twelve have integrated

Table 1. Device summary

L9390

Twelve channel valve driver

Data Brief

TQFP100

(Exposed pad down)

active freewheeling diodes for active rectification of the PWM controlled load.

In order to minimize electromagnetic emissions during load actuation, the possibility to control output slopes is provided.

Two separate communication interfaces are present: the SPI port is primarily designated to provide diagnostics and secondary control. The serial High End Timer Interface (HET) provides the primary output control functions from on/off switching to current level control commands.

Diagnostic includes over current protection, under current detection, open load detection, loss of ground detection, loss of freewheeling diode, and over temperature detection, output integrity check, SVDT, leakage current test, PWM integrity and functionality check, valve resistance sense check, loss of freewheeling diode detection and more.

Power supply monitoring is also included.

Part number Package Packing

L9390 TQFP100 14x14x1.0mm (exposed pad down) Tray

March 2007 Rev 1 1/8

For further information contact your local STMicroelectronics sales office.

www.st.com

Pin description L9390

1 Pin description

Figure 1. Pin connection (top view)

OUT7

PGND3_7

OUT3

PGND3_7

OUT3D8D8

OUT2

N.C.

PGND2_6

OUT6

N.C.D7D7

100 99 98

97 96 95 949293 91 90 89 88 87

OUT6

OUT1

OUT5

N.C.

26 27 28

N.C.

29 30 31 32 33

N.C.

VCP

HET1-6

34 35 36 37 38 39

HET1-6

PGND1_5

Table 2. Pins description

Pin # Name Description

OUT8

PGND4_8

86 85 84 838182 80 79 78 77 76

40 41 42 43 44

N.C.

LOGI

VRS_Meas

DGND

OUT_EN

AGND

N.C.

CLKin

OUT4

N.C.D9D9

OUT4

451146 47 48 49 50

CLK

MISO

MOSI

BUSY

N.C.

OUT9

PGND9

OUT11

D11

D10

OUT10

PGND10_12

OUT12

D12

AC00078

1-3 OUT2 Valve Low Side Driver output, Switched or PWMmed

4 N.C. Not Connected

5-9 PGND2_6 Dedicated Output Power Ground

10-11 OUT6 Valve Low Side Driver output, PWMmed or Current Regulated

12-13 D6 Freewheeling Diode Cathode

14-15 OUT1 Valve Low Side Driver output, Switched or PWMmed

16-20 PGND1_5 Dedicated Output Power Ground

21-22 OUT5 Valve Low Side Driver output, PWMmed or Current Regulated

23-24 D5 Freewheeling Diode Cathode

25-26 N.C. Not Connected

27 Vs Battery level Supply input voltage

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L9390 Pin description

Table 2. Pins description (continued)

Pin # Name Description

28 VCP Charge Pump voltage input

29 N.C. Not Connected

30-35 HET1-6 Serial High End Timer inputs

36 V3 3.3V supply input

37 LOGI Logic Supply Input, must be tied to V3

38 VRS_Meas Switch connection to pin D5 for the purpose of diagnosing specific load resistances.

39 OUT_EN Enables/ disables all outputs asynchronous to any other commands

40 DGND Circuit ground

41 AGND Signal Ground

42-43 N.C. Not Connected

44 CLKin Clock input for IC

45 CS SPI Chip Select input

46 CLK SPI Clock input

47 MISO SPI Master in Slave out

48 MOSI SPI Master out Slave in

49 BUSY SPI Enable input

50 N.C. Not Connected

51-52 D12 Freewheeling Diode Cathode

53-54 OUT12 Valve Low Side Driver output, Current Regulated

55-59 PGND10_12 Dedicated Output Power Ground

60-61 OUT10 Valve Low Side Driver output, Current Regulated

62-63 D10 Freewheeling Diode Cathode

64-65 D11 Freewheeling Diode Cathode

66-67 OUT11 Valve Low Side Driver output, PWMmed

68-71 PGND9 Dedicated Output Power Ground

72-75 OUT9 Valve Low Side Driver output, PWMmed

76-78 D9 Freewheeling Diode Cathode

79 N.C. Not Connected

80-81 OUT4 Valve Low Side Driver output, Switched or PWMmed

82-85 PGND4_8 Dedicated Output Power Ground

86-87 OUT8 Valve Low Side Driver output, PWMmed or Current Regulated

88-89 D8 Freewheeling Diode Cathode

90-91 OUT3 Valve Low Side Driver output, Switched or PWMmed

92-95 PGND3_7 Dedicated Output Power Ground

96-97 OUT7 Valve Low Side Driver output, PWMmed or Current Regulated

98-99 D7 Freewheeling Diode Cathode

100 N.C. Not Connected

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