Datasheet

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L9651

September 2013

■ Modified VDMOS Power Stage (U

DSBR

> 80V)

■ RDSON < 500 mOhm (T

= 25°C)

■ CMOS Compatible Inputs

■ Enable Input (Reset)

■ Outputs Capable of up to 2.2 Amperes

■ Outputs Internally Clamped at 70V for Fast

Inductive Load Switch Off

■ Wide operating supply voltage from 4.7V up to

30V

■ DIAGNOSTIC FUNCTIONS

■ Open Load Detection (Output off, 100s-

filtering time)

■ Short to Ground Detection (Output off, 100s -

filtering time)

■ Short to Battery Detection (Output on)

■ Over temperature detection (Output on)

■ Storage of last fault in 8 Bit - Serial Register

■ Fault Signal Indication at Serial Data Out

without need to read out the Serial Interface

■ Daisy Chainable Serial Diagnostic

■ Serial Interface Clock Frequency up to 500kHz

DESCRIPTION

The L9651 consists of four identical low side power

switches. A serial diagnostic interface indicates fail

ure mode of each switch (short circuit to V

BAT

ground and open load or over temperature).

PowerSO-20

ORDERING NUMBER: L9651

SMART QUAD SWITCH

BLOCK DIAGRAM

Serial Diagnostic

Tur n On

BAT

Clock Sync.

Serial Data Out

Ground

Reset

●

Four Fold

Logic

Short Circuit

Protection

●

Fault Detection

References

Gate

Control

Output 1..4

Data In

Inputs 1..4

Underv. Shutd.

Summary of content (9 pages)

PAGE 1
L9651 SMART QUAD SWITCH ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ Modified VDMOS Power Stage (UDSBR > 80V) RDSON < 500 mOhm (Tj = 25°C) CMOS Compatible Inputs Enable Input (Reset) Outputs Capable of up to 2.2 Amperes Outputs Internally Clamped at 70V for Fast Inductive Load Switch Off Wide operating supply voltage from 4.
PAGE 2
L9651 PIN CONNECTION (Top view) GND 1 20 N.C. 2 19 N.C. IN1 3 18 IN4 IN2 4 17 IN3 OUT1 5 16 OUT4 VBAT 6 15 R OUT2 7 14 OUT3 DO 8 13 DI CL 9 12 SY 10 11 GND GND SO20POW PIN FUNCTION N° Pin 1, 10, 11, 20 GND Ground 2, 19 N.C.
PAGE 3
L9651 ABSOLUTE MAXIMUM RATINGS Symbol TSTG TJ Parameter Value Unit Storage Temperature -55 to 150 o Operating Junction Temperature -40 to 150 o VBAT DC Supply Voltage VBATtr C C -2 to 30 V Transient Supply Voltage; t < 400ms 40 V VOUT Output Voltage 65 V VOUTtr Transient Output Voltage; during clamping 78 V Output Clamping energy; repetition rate < 100 Hz 10 mJ Output reverse current 2 A -0.3 to 6.5 V -0.3 to 6.
PAGE 4
L9651 ELECTRICAL CHARACTERISTCS (continued) Symbol Parameter Test Condition Min. Typ. Max. Unit Logic Inputs IN1...IN4, SY, CL, DI, R VINiLH VSYLH VCLLH VRLH VDILH Input High level 3.5 6.5 V VINiHL VSYHL VCLHL VRHL VDIHL Input Low level -0.3 1.5 V VINih VSYh VCLh VRh VDIh Hysteresis 0.2 1 V - IINi - ISY - IC L - IR Input current IN1 ...
PAGE 5
L9651 ELECTRICAL CHARACTERISTCS (continued) Symbol Parameter Test Condition Min. Typ. Max. Unit Output voltage monitoring Output off VOL Open load threshold voltage (fault detected if VOUTi < VOL) 7.5V < VBAT < 22V 2/3VBAT VSG Short to GND threshold voltage (fault detected if VOUTi < VSG) 7.5V < VBAT < 22V 1/3VBAT Open load output voltage IOUT = 0 A VINi = 5V 7.
PAGE 6
L9651 Figure 2. Serial Interface Error Coding BIT 1 BIT 2 OUTPUT 1 BIT 4 BIT 3 BIT 5 BIT 6 OUTPUT 3 OUTPUT 2 BIT 7 BIT 8 OUTPUT 4 H H o.k. L H open load/over temperature H L short to battery L L short to ground BIT n DI Figure 3. Output voltage TIMING for inductive load VINi VINiH VINiL t VOUTi VCL 0.8VCL sOFF VBAT 0.8VBAT sON 0.
PAGE 7
L9651 Figure 4.
PAGE 8
L9651 DIM. mm MIN. TYP. A a1 inch MAX. MIN. TYP. 3.6 0.1 0.3 a2 0.142 0.004 0.012 3.3 a3 0.130 0 0.1 0.000 0.004 b 0.4 0.53 0.016 0.021 c 0.23 0.32 0.009 0.013 D (1) 15.8 16 0.622 0.630 D1 (2) 9.4 9.8 0.370 0.386 E 13.9 14.5 0.547 e 1.27 e3 E1 (1) E3 0.570 0.450 11.1 E2 0.429 0.437 0.228 0.244 2.9 5.8 6.2 0.114 G 0 0.1 0.000 0.004 H 15.5 15.9 0.610 0.626 0.031 0.043 h L 1.1 0.8 1.1 0.043 N 8˚(typ.) S 8˚(max. ) T Weight: 1.9gr 0.
PAGE 9
L9651 Please Read Carefully: Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale.