ST L9997ND User Manual

®

HALF BRIDGE OUTPUTS WITH TYPICAL
R

= 0.7

ON

Ω

OUTPUT CURRENT CAPAB ILITY ±1.2A
OPERATING SUPPLY VOLTAGE RANGE 7V

TO 16.5V
SUPPLY OVERVOLTAGE PROTECTION

FUNCTION FOR V

UP TO 40V

VS

VERY LOW QUIESCENT CURRENT IN
STANDBY MODE < 1µA

CMOS COMPATIBLE INPUTS WITH HYS­TERESIS

OUTPUT SHORT-CIRCUIT PROTECTION
THERMAL SHUTDOWN
REAL TIME DIAG NOSTIC: THERMAL OVER-

LOAD, OVERVOLTAGE

L9997ND

DUAL HALF BRIDGE DRIVER

MULTIPOWER BCD TECHNOLOGY

SO20 (12+4+4)

ORDERING NUMBERS:

L9997ND013TR

L9997ND

DESCRIPTION

The L9997ND is a monolithic integrated driver, in
BCD technology intended to drive various loads,

BLOCK DIAGRAM

VS VS

1

EN

IN1

IN2

10

12

9

ENABLE

REFERENCE

BIAS

including DC motors. The circuit is optimized for
automotive electronics enviromental conditions.

DIAG

11

PROTECTION

FUNCTIONS

DRIVER 1

DRIVER 2

VS

OUT1

19

VS

OUT2

2

5V

M

April 1999

GND

4...7, 14...17

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L9997ND

ABSOLUTE MAXIMUM RATINGS

Symbol Parameter Value Unit

V

V

V

V

I

VSDC

VSP

I

OUT

IN1,2

V

EN

DIAG

I

OUT
DIAG

DC Supply Voltage -0.3 to 26 V
Supply Voltage Pulse (T < 400ms) 40 V
DC Output Current

1.8 A

±

DC Input Voltage -0.3 to 7 V
Enable Input Voltage -0.3 to 7 V
DC Output Voltage -0.3 to 7 V
DC Output Short-circuit Current -0.3V < V

< VS + 0.3V internally limited

OUT

DC Sink Current -0.3V < VDG < 7V internally limited

PIN CONNECTION

(Top view)

V

S

OUT2

N.C.
GND
GND
GND
GND

N.C.

IN2 IN1

EN DIAG

2
3
4
5
6
7
8
9
10

D95AT166

20
19
18
17
16
15
14
13
12
11

N.C.1
OUT1
N.C.
GND
GND
GND
GND
N.C.

PIN FUNCTIONS

N. Name Function

1 VS Supply Voltage
2 OUT2 Channel 2: Push-Pull power output with intrinsic body diode

3, 8, 13,

18,20

4 to 7,

14 to 17

9 IN2 Input 2: Schmitt Trigger input with hysteresis (non-inverting signal control)

10 EN Enable: LOW or not connected on this input switches the device into standby mode and the

11 DIAG Diagnostic: Open Drain Output that switches LOW if overvoltage or overtemperature is

12 IN1 Input 1: Schmitt Trigger input with hysteresis (non-inverting signal control)

NC NC: Not Connected

GND Ground: signal - and power - ground, heat sink

outputs into tristate

detected

THERMAL DATA

Symbol Parameter Value Unit

T

jTS

T

jTSH

R

th j-amb

R

th j-pins

(1) With 6cm2 on board heatsink area.

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Thermal Shut-down Junction Temperature 165 °C
Thermal Shut-down Threshold Hysteresis 25 K
Thermal Resistance Junction-Ambient

(1)

50 K/W

Thermal Resistance Junction-Pins 15 K/W

L9997ND

ELECTRICAL CHARACTERISTICS

(7V < V

< 16.5V; -40°C < TJ < 150°C; unless otherwise specified.)

S

Symbol Parameter Test Condition Min. Typ. Max. Unit

I

VS_SB

I

VS

V

ENL

V

ENH

V

ENthh

I

EN

V

IN1,2L

V

IN1,2H

V

IN1,2thh

I

IN1,2

R

ON OUT1,2

|I

OUT1,2

V

DIAG

Quiescent Current in Standby
Mode

Supply Current EN = HIGH, I
Low Enable Voltage 1.5 V
High Enable Voltage 3.5 6 V
Enable Threshold Hysteresis 1 V
Enable Input Current VEN = 5V 85 250
Low Input Voltage 1.5 V
High Input Voltage 3.5 V
Input Threshold Hysteresis 1 V
Input Bias Current VIN = 0

ON-Resistance to Supply or
GND

| Output Current Limitation 1.2 1.6 2.2 A

Diagnostic Output Drop I

VEN < 0.3V; VVS <16.5V; Tj < 85°(*)
V

= 0; VVS = 14.5V; T

EN

OUT1,2

V

= 5V, EN = HIGH

IN

I

= ±0.8A; VVS = 7V; Tj = 125°C

OUT

I

= ±0.8A; VVS = 12V; Tj = 125°C

OUT

I

= ±0.8A; VVS = 12V; Tj = 25°C

OUT

= 0.5mA, EN = HIGH

DIAG

= 25°C

j

= 0 2 6 mA

<1
<1

-3
2

0

10

1.2

1.1

90
10

1

50

2.8

2.25

0.7

0.6 V
Overvoltage or Thermal Shut­down

V

VSOVth

Supply Overvoltage

17 19 21 V

Threshold

t

ONLH

t

ONHL

t

OFFHL

t

OFFLH

t

dHL

t

dLH

t

rHS

t

rLS

t

fHS

t

fLS

* Tested at 125°C and guaranteed by correlation

Turn on Delay Time See Fig. 2; VVS = 13.5V

Measured with 93Ω load

50 150
30 150

Turn off Delay Time 10 100

220
Rising Delay Time 115 250
Falling Delay Time 115 250
Rise Time 30 100

60 150

Fall Time 25 100

50 150

A

µ

A

µ

A

µ

A

µ

A

µ

Ω
Ω
Ω

s

µ

s

µ

s

µ

s

µ

s

µ

s

µ

s

µ

s

µ

s

µ

s

µ

FUNCTIONAL DESCRIPTION

The L9997ND is a motor driver two half-bridge

outputs, intended for driving dc motors in automo­tive systems. The basic function of the device is
shown in the Table 1.

Table 1. Table function.

Status EN IN1 IN2 OUT1 OUT2 DIAG NOTE

1 L X X Tristate Tristate OFF Standby Mode
2 H H H SRC SRC OFF Recommended for braking
3 H H L SRC SNK OFF
4HLHSNKSRCOFF
5 H L L SNK SNK OFF
6 H X X Tristate Tristate ON Overvoltage or Overtemperature

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