Datasheet L6370L, L6370D Datasheet (SGS Thomson Microelectronics)

L6370

2.5A HIGH-SIDE DRIVER

INDUSTRIALINTELLIGENT POWER SWITCH

2.5A OUTPUT CURRENT

9.5V TO35V SUPPLY VOLTAGE RANGE
INTERNALCURRENT LIMITING
THERMALSHUTDOWN
OPENGROUNDPROTECTION
INTERNALNEGATIVE VOLTAGE CLAMPING

TOV

- 50VFOR FAST DEMAGNETIZATION

S

DIFFERENTIAL INPUTS WITH LARGE COM­MON MODE RANGE AND THRESHOLD
HYSTERESIS

UNDERVOLTAGELOCKOUTWITHHYST ERESIS
OPENLOAD DETECTION
TWODIAGNOSTICOUTPUT S
OUTPUTSTATUS LEDDRIVER
NON DISSIPATIVE SHORT CIRCUIT PRO-

TECTION
PROTECTIONAGAINST AND SURGE TRAN-

SIENT (IEC 801-5)
IMMUNITY AGAINST BURST TRANSIENT

(IEC801-4)
ESD PROTECTION (HUMAN BODY MODEL

2KV)

±

BLOCK DIAGRAM

MULTIPOWER BCD TECHNOLOGY

MULTIWATT11(in line)

ORDERINGNUMBERS: L6370L (MULTIWATT11)

PowerSO20

L6370D (PowerSO20)

DESCRIPTION

The L6370 is a monolithic Intelligent Power
Switch in Multipower BCD Technology, for driving
inductive or resistive loads. An internal Clamping
Diode enables the fast demagnetizationof induc­tive loads. Diagnostic for CPU feedback and ex­tensive use of electricalprotections make this de­vice extremely rugged and specially suitable for
industrialautomation applications.

March 1997

IN+

IN-

ON-DELAY

INPUT

1.4V

OSC

THERMAL

PROTECTION

+

-

NON DISSIPATIVE

SHORT CIRCUIT

OUTSTATUS

3mA

OUTPUT STATUS

UNDER

VOLTAGE

CHARGE

PUMP

DRIVER

CURRENT

LIMITATION

OPEN LOAD
DETECTION

DIAGNOSTIC

D95IN208D

V

S

OUT

RSC

DIAG1

DIAG2

1/10

L6370

PIN CONNECTION (Topview)

11
10

9
8
7
6
5
4
3
2
1

D95IN209A

OUTPUT
SUPPLY VOLTAGE
OUTPUT
RSC
ON-DELAY
GND
OUTPUT STATUS
INPUT ­INPUT +
DIAGNOSTIC 2
DIAGNOSTIC 1

GND
OUTPUT
OUTPUT

ON-DELAY

SUPPLY VOLTAGE

N.C.
OUTPUT
OUTPUT N.C.

GND GND

2
3
4
5
6
7
8
9
10

20
19
18
17
16
15
14
13
12
11

GND1
OUTPUT STATUS
INPUT ­INPUT +
N.C.SUPPLY VOLTAGE
DIAGNOSTIC 2
DIAGNOSTIC 1
RSC

D95IN210B

Note: Outputpins must be must be connected externally to the package touse all leadsfor the outputcurrent(Pin9 and11 for Multiwatt

package, Pin 2, 3, 8 and 9 for PowerSO20 package).

ABSOLUTE MAXIMUM RATINGS (Pinnumberingreferredto Multiwatt package)

Symbol Parameter Value Unit

V

V

S–VO

V

I

V
V

I
P
T
T

E

S

od

od

I

O

tot
op
stg

Supply Voltage (Pin 10) (TW< 10ms) 50 V
Supplyto Output Differential Voltage.Seealso VCl(Pins10 - 9) internally limited V
Externally Forced Voltage (Pin7) -0.3 to 7 V
Externally Forced Voltage (Pin7) +1 mA
Input Voltage (Pins 3/4) -10 to VS +10 V

i

Differential Input Voltage (Pins 3 - 4) 43 V

i

Input Current (Pins 3/4) 20 mA

i

Output Current (Pin 9). See also ISC (Pin 9) internally limited A
Power Dissipation.See also THERMAL CHARACTERISTICS. internally limited W
Operating Temperature Range (T

) -25 to +85 °C

amb

Storage Temperature -55 to 150 °C
Energy Induct.Load TJ=85°C1J

I

THERMAL DATA

Symbol Description Multiwatt PowerSO20 Unit

Thermal Resistance Junction-case Max. 1.5 1.5 °C/W
Thermal Resistance Junction-ambient Max. 35 – °C/W

2/10

R

th j-case

R

th j-amb

PIN FUNCTION (pinnumbering referred to Multiwattpackage)

N. Name Function

1 DIAG1 DIAGNOSTIC 1 output. This open drain reports the IC workingconditions. (See

Diagnostic truth table)

2 DIAG1 DIAGNOSTIC 2 output. This open drain reports the IC workingconditions. (See

Diagnostic truth table)
3 IN - Comparator non inverting input
4 IN+ Comparator inverting input
5 OUTSTATUS This current source output is capable of drivinga LED to signal the status of the output

pin. The pin is active (source current) when the output pin is considered high (See fig 1)
6 GND Ground
7 ON-DELAY Programmable ON time interval duration during short circuit operation
8 RSC Current limitation setting.
9 OUTPUT High Side output with built-in current limitation

10 V

S

Supply Volatge Input, the valueof the supplyvoltage is monitored to detect under voltage

condition

11 OUTPUT High Side output with built-in current limitation

ELECTRICALCHARACTERISTICS (VS= 24V; TJ= –25 to +125°C, unless otherwise specified)

Symbol Parameter Test Condition Min. Typ. Max. Unit

V

smin

V

s

I

q

V

sth1

V

sth2

V

shys

I

sc

V

don

I

oslk

V

ol

V

cl

I

old

V

id

I

ib

V

ith

V

iths

R

id

I

ilk

Supply Voltage for Valid

I

> 0.5mA ; V

diag

= 1.5V 4 35 V

dg1

Diagnostics
Supply Voltage (operative) 9.5 24 35 V
Quiescent Current

I

out=Ios

=0

V
V

il
ih

0.8
3

1.4
5

Undervoltage Threshold 1 (See fig. 1), Tamb = 0 to +85°C 8.5 9 9.5 V
Undervoltage Threshold 2 8 8.5 9 V
Supply Voltage Hysteresis 300 500 700 mV
Short Circuit Current VS= 9.5 to 35V; RL=2

Output Voltage Drop I

5kΩ <R
0<R

out

I

out

< 30kΩ

SC

<5kΩ 2.6 3.2 4 A

SC

= 2.0A Tj=25°C

T

= 125°C

j

= 2.5A Tj=25°C

T

= 125°C

j

Ω

(kΩ)A

15/R

SC

200
320
250
400

280
440
350

550
Output Leakage Current Vi=Vil;Vo= 0V 500 µA
Low State Out Voltage Vi=Vil;RL=∞ 0.8 1.5 V
Internal Voltage Clamp (VS-VO)IO=1A

48 53 58 V

Single Pulsed: Tp =300µs
Open Load Detection Current Vi=Vih;T
Common Mode Input Voltage

VS= 18 to 35V –7 15 V

= 0 to +85°C136mA

amb

Range (Operative)
Input Bias Current Vi= –7 to 15V; –In = 0V –250 250 µA
Input Threshold Voltage V+In > V–In 0.8 1.4 2 V
Input Threshold Hysteresis

V+In > V–In 50 400 mV
Voltage

Diff. Input Resistance 0 < +In < +16V; –In= 0V

–7 < +In < 0V ; –In = 0V
Input Offset Current V+In = V–In +Ii

0V < V

<5.5V –Ii

i

–In = GND +Ii

0V < V+In <5.5V –Ii –250

+In = GND +Ii

0V < V–In <5.5V –Ii

–20
–75 –25

–100

–50

400
150

+10

–125

–30
–15

+20 µA

+50

L6370

mA
mA

mV
mV
mV
mV

K

Ω

KΩ

A

µ

A

µ
µA

µA
µA

3/10

L6370

ELECTRICALCHARACTERISTICS (continued)

Symbol Parameter Test Condition Min. Typ. Max. Unit

V

oth1

Output Status Threshold 1
Voltage

V

oth2

Output Status Threshold 2
Voltage

V

ohys

Output Status Threshold
Hysteresis

I

osd

V

osd

Output Status Source Current V
Active Output Status Driver

Drop Voltage

I

oslk

Output Status Driver Leakage
Current

V

I

dgl

dglk

Diagnostic Drop Voltage D1 /D2= L ; I

Diagnostic Leakage Current D1 / D2=H ; 0 < Vdg < V

SOURCE DRAIN NDMOS DIODE

V

fsd

I

fp

t

rr

t

fr

Forward OnVoltage @ I
Forward Peak Current t = 10ms; d = 20% 6 A
Reverse Recovery Time If= 2.5A di/dt = 25A/µs 200 ns
Forward Recovery Time 100 ns

THERMAL CHARACTERISTICS

Θ Lim Junction Temp. Protect. 135 150 °C

T

Θ

Note Vil< 0.8V, Vih> 2V @ (V+In > V–In)

Thermal Hysteresis 20

H

AC OPERATION(pin numberingreferred to Multiwatt package)

(See fig. 1) 4.5 5 5.5 V

(See fig. 1) 4 4.5 5.0 V

(See fig. 1) 300 500 700 mV

out>Voth1;Vos

Vs – Vos;Ios= 2mA

T

= 0 to+85°C

amb

V

out<Voth2;Vos

V

= 9.5 to 35V

S

D1/D2=L; I

= 2.5V 2 4 mA

1.5 3 V

diag
diag

=0V

= 0.5mA
= 3mA

40

250

s

25 µA

5

VS= 9.5 to 35V

= 2.5A 1 1.5 V

fsd

mV
mV

µ

C

°

A

Symbol Pin Parameter Test Condition Min. Typ. Max. Unit

-t

t

r

t

d

9vs 4 Rise or Fall Time VS= 24V; RI=70Ω;Rlto

f

9 vs 3 Delay Time 5 µs

ground

20 µs

dV/dt 9, 11 Slew Rate (Rise and Fall Edge) 0.7 1 1.5 V/µs

t

ON

7 On time during Short Circuit

50pF <C

< 2nF 1.28 µs/pF

DON

Condition

t

OFF

Of time during hort Circuit

64 t

Condition

f

max

Maximum Operating

25 KHz

Frequency

Figure 1: Output Status Hysteresis

V

shys

V

oth2

V

oth1

D95IN211A

V

OUT

ON

4/10

Figure 2: UndervoltageComparator Hysteresis

V

L6370

shys

V

oth1

V

oth2

D95IN212

V

s

Figure 3: Switching Waveforms

V

in

50% 50%

D94IN127A

t

t

t

d

V

out

90% 90%

50% 50%

10% 10%

t

r

t

d

t

f

DIAGNOSTICTRUTH TABLE

Diagnostic Conditions Input Output Diag1 Diag2

Normal Operation L

H

Open Load Condition (I

)L

o<Iold

H

Short to V

S

L

H

Short Circuit to Ground (I

O=ISC

) (**)

H H (*)

(pin ON-DELAY grounded)
Output DMOS Open L

H

Overtemperature L

H

Supply Undervoltage (V

S<Vsth2

)L

H

(*) According to the intervention of the current limitingblock.
(**) A cold lamp filament, or a capacitive load may activate the current limiting circuit ofthe IPS, when the IPSis initially turnedon.

L

H

L

H
H

H

H
H

H
L

L
L

H

L
L

L
L

L
L

L

H
H

L
H

H
L

L

H
H

H
H

H
H

H
H

H
H

L
L

L
L

5/10

L6370

INPUT SECTION

The input section is an high impedance differen­tial stage with high common and differentialmode
range. There’s built-in offset of +1.4V (typical
value) and an hysteresis of 400mV (maximum
value), to ensure high noiseimmunity.

DIAGNOSTICLOGIC

The operatingconditions of the deviceare perma­nently monitored and the following occurences
are signalled via the DIAG1/DIAG2 open-drain
output pins:

-ShortCircuit versus ground.
A current limiting circuit fixes at Isc = 3.2A
(typical value) the maximum current that can
be sourced from the OUTPUT pin (for more
detailssee shortcircuit operation section).

- ShortCircuitversusVs.

- UnderVoltage(UV)

- Over Temperature(OVT)

- Open Load, if the output current is less than
3mA(typical value).

- OutputDMOS Open
accordingto the diagnosticTruth Table:

erationis resumed.
The t

and 2.56ms for a C

interval can be set to lasts between 64µs

ON

capacitorvalue ranging be-

ON

tween 50pF and 2nF to have:

(µs) = 1.28 CON(pF)

t

ON

If the ON-DELAY pin is groundedthe non dissipa­tive short circuit protection is disabled, and the Isc
current is delivered until the Overtemperature
Protection shuts the device off. The behaviour of
the DIAG2 output is, in this situation, showed in
the Diagnostic Truth Table.

OVERTEMPERATURE PROTECTION (OVT)

If the chip temperatureexceeds Θ

(measuredin

lim

a central position in the chip) the chip deactivates
itself.
The following actions are taken:

all the output stage is switched off;
the signal DIAG2 is activated(activelow).
Normaloperation is resumed as soon as (typically

after some seconds) the chip temperature moni­tored goes back below Θ

lim-ΘH

.
The different thresholds with hysteretic behavior
assure that no intermittent conditionscan be gen­erated.

SHORT CIRCUIT OPERATION

in order to minimise the power dissipation when
the output is shorted to grounded, an innovative,
non dissipative short cicuit protection (patent
pending) is implemented, avoiding, thus the inter­vention of the thermalprotectionin most cases.

Whenever the output is shorted to ground, or,
generally speaking, an over current is sinked by
the load, the output devices is driven in linear
mode, sourcing the Isc current(typically 3.2A) for
a time interval(t
nal C

capacitor connected between the ON-

ON

) definedby means of the exter-

on

DELAY pin and GND. Whether the short circuit
crease within the t

interval the DIAG2 output

on

status is not affected, acting as a Programmable
Diagnostic Delay.
This function allow the device to drive a capaci­tive load or a filament lamp (that exhibits a very
low resistance during the initial heading phase)
without the interventionof the diagnostic.
If the short circuit lasts for the whole t

ON

interval,
the output DMOS is switchedOFF and the DIAG2
goes low, for a timeinterval t

.

t

ON

At the end of the t

interval if the short circuit

OFF

lasting 64 times

OFF

condition is still present, the output DMOS is
turned ON (and the DIAG2 goes high - see fig4)
for another t

interval and the sequence starts

ON

again, or, whether not, the normal condition op-

UNDERVOLTAGEPROTECTION(UV)

The supply voltage is expected to range from

9.5V to 35V, even if its referencevalue is consid­ered to be 24V.

In thisrange the device operates correctly.
Below 9.5V the overall system has to be consid­ered not reliable.
Protection will thus shut off the output whenever
the supply voltage falls below the mask fixed by
the V

(9V typ.) and V

sth1

(8.5Vtyp.).

sth2

The hysteresis(see fig. 2) ensures a nonintermit­tent behavior at low supply voltage with a super­imposed ripple.
The Under Voltage status is signalled via the
DIAG1 and DIAG2 outputs (see the Diagnostic
TruthTable) .

DEMAGNETIZATION OF INDUCTIVE LOADS

An internal zener diode, limiting the voltage
across the Power MOS to between 50 and 60V

), provides safe and fast demagnetization of

(V

cl

inductiveloadswithout externalclamping devices.
The maximum energy that can be absorbed from

an inductive load is specified as 1J (at Tj = 85°C)
(see figure 2)

6/10

Figure 4: L6370 Short Circuit OperationWaveforms

OUTPUT

CURRENT

I

sc

I

out

L6370

t<t

ON

DIAG2

(active low)

Figure 5: InductiveLoad Equivalent Circuit

I

S

50V

V

S

Time

Time

+V

t

S

ON

t

OFF

D95IN213

t

ON

t

OFF

Short CircuitShort Circuit

OUTPUT

I

O

L

RL

D95IN215A

7/10

L6370

MULTIWATT11 (in line)PACKAGE MECHANICAL DATA

DIM.

MIN. TYP. MAX. MIN. TYP. MAX.

A 5 0.197
B 2.65 0.104
C 1.6 0.063
E 0.49 0.55 0.019 0.022
F 0.88 0.95 0.035 0.037

G 1.57 1.7 1.83 0.062 0.067 0.072
G1 16.87 17 17.13 0.664 0.669 0.674
H1 19.6 0.772
H2 20.2 0.795

L 26.4 26.9 1.039 1.059
L1 22.35 22.85 0.880 0.900
L3 17.25 17.5 17.75 0.679 0.689 0.699
L4 10.3 10.7 10.9 0.406 0.421 0.429
L7 2.65 2.9 0.104 0.114

S 1.9 2.6 0.075 0.102

S1 1.9 2.6 0.075 0.102

Dia1 3.65 3.85 0.144 0.152

mm inch

8/10

PowerSO20PACKAGE MECHANICAL DATA

L6370

DIM.

mm inch

MIN. TYP. MAX. MIN. TYP. MAX.

A 3.60 0.1417
a1 0.10 0.30 0.0039 0.0118
a2 3.30 0.1299
a3 0 0.10 0 0.0039

b 0.40 0.53 0.0157 0.0209

c 0.23 0.32 0.009 0.0126

D (1) 15.80 16.00 0.6220 0.6299

E 13.90 14.50 0.5472 0.570

e 1.27 0.050
e3 11.43 0.450

E1 (1) 10.90 11.10 0.4291 0.437

E2 2.90 0.1141

G 0 0.10 0 0.0039

h 1.10

L 0.80 1.10 0.0314 0.0433

N10

(max.)

°

S8°(max.)

T 10.0 0.3937

(1) ”D and E1” do not include mold flashor protrusions

- Moldflash or protrusions shall not exceed 0.15mm (0.006”)

E2

hx45°

NN

a2

A

b

DETAILA

e3

e

R

DETAILB

D

1120

E1

T

110

PSO20MEC

lead

a3

Gage Plane

E

DETAILB

0.35

S

a1

L

c

DETAILA

slug

-C-

SEATINGPLANE

GC

(COPLANARITY)

9/10

L6370

Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics assumes no responsibility for the
consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No
license is granted by implication or otherwise under any patent or patent rights of SGS-THOMSON Microelectronics. Specifications men­tioned in this publication are subject to change without notice. This publication supersedes and replaces all informationpreviously supplied.
SGS-THOMSON Microelectronics products are not authorized for use as critical components in life support devices or systems without ex­press written approval of SGS-THOMSON Microelectronics.

 1997 SGS-THOMSON Microelectronics – Printed in Italy – AllRights Reserved

MULTIWATTis a Registered Trademarkof SGS-THOMSON Microelectronics

PowerSO20 isa Trademark of SGS-THOMSON Microelectronics

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10/10