Datasheet L6375D, L6375 Datasheet (SGS Thomson Microelectronics)

0.5A INDUSTRIAL INTELLIGENT POWER SWITCH

■

0.5A OUTPUT CURRENT

■ 8V TO 35V SUPPLY VOLTAGE RANGE

■

NON DISSIPATIVE SHORT CIRCUIT
PROTECTION

■ THERMAL SHUTDOWN

■

OPEN GROUND PROTECTION

■

NEGATIVE VOLTAGE CLAMPING FOR FAST
DEMAGNETIZATION

■ UNDERVOLTAGE LOCKOUT WITH

HYSTERESIS

■

OPEN LOAD DETECTION

■ TWO DIAGNOSTIC OUTPUTS

■

OUTPUT STATUS LED DRIVER

■

IMMUNITY AGAINST BURST TRANSIENT
(IEC 801-4), see application schematic.

■

ESD PROTECTION (HUMAN BODYMODEL
±2KV)

L6375

PRELIMINARY DATA

MULTIPOWERBCD TECHNOLOGY

SO20 MINIDIP

ORDERING NUMBERS:

L6375D L6375

DESCRIPTION

The L6375 is a monolithic fully protected, full diag­nostic 0.5A Intelligent Power Switch. it is designed to
drive any kind of R-L-C load with controlled output
voltage slew rate and non dissipative short circuit
protection. An internal Clamping Diode enables the
fast demagnetization of inductive loads. Diagnostic
for CPU feedbackand extensive use of electrical pro­tections make this device extremely rugged and spe­cially suitable for industrial automation applications.

BLOCK DIAGRAM

V

S

UNDER

VOLTAGE

INPUT

1.4V

OSC

THERMAL

PROTECTION

+

-

NON DISSIPATIVE

SHORT CIRCUIT

OUTSTATUS

3mA

OUTPUT STATUS

IN+

IN-

Con

February 2000

This ispreliminary information ona new product now in development or undergoing evaluation. Details are subject to change without notice.

CHARGE

PUMP

DRIVER

CURRENT

LIMITATION

OPEN LOAD
DETECTION

DIAGNOSTIC

OUT

DIAG1

DIAG2

D95IN208B

1/12

L6375

PIN FUNCTION (Pin numbering referred to Minidip package)

N° Pin Description

1 GND Ground
2 OUT High side output. Controlled output with current limitation
3 Vs Supply voltage input. Range with under voltage monitoring
4 OUTPUT STATUS Led driver to signal thestatus of the output pin. The pin is active ( sources current )

5 DIAG1 Diagnostic 1 output. This open drain reports the IC working conditions. (See

6 DIAG2 Diagnostic 2 output. This open drain reports the IC working conditions. (See

7 IN+ Comparator non inverting input
8 ON DELAY Delay setting for overcurrent diagnostic

when the outputis considered high. (See fig. 1)

Diagnostic truth table)

Diagnostic truth table)

PIN CONNECTION (Top view)

GND

OUTPUT

V

OUTPUT STATUS

1
2

MINIDIP

3

S

4 DIAG2

ON DELAY8
INPUT +

7

DIAG1

6
5

2/12

N.C.

GND

N.C.

OUTPUT

N.C.

V

S

N.C.
N.C.
N.C. N.C.

OUTPUT STATUS N.C.

2
3
4
5
6
7
8
9
10

SO20

20
19
18
17
16
15
14
13
12
11

N.C.1
ON DELAY
N.C.
INPUT+
N.C.
DIAG1
DIAG2
N.C.

L6375

ABSOLUTEMAXIMUM RATINGS

Symbol Pin Parameter Value Unit

V

s

V

s

Vs -Vout

Vod

od

I

Iout

Vout

Ptot

diag

V

diag

I

Ii

V

i

T

op

3 Supply Voltage (tw < 10 ms) 50 V
3 Supply Voltage (DC) 40 V

3 vs 2 Supply to Output Differential voltage internally limited

5 Externally Forced Voltage -0.3 to 7 V
5 Externally Forced Current ±1mA
2 Output Current (see also Isc) internally limited
2 Output Voltage internally limited V

Power Dissipation internally limited

5.6 External voltage -0.3 to 40 V

5.6 Externally forced current -10 to 10 mA
7 Input Current 20 mA
7 Input Voltage -10 to Vs+0.3 V

Ambient temperature, operating range -25 to 85 °C

(Pin numbering referred to Minidip package)

T

Tstg

E

j

I

Junction temperature, operating range
(see Overtemperature Protection)

Storage temperature -55 to 150 °C
Energy Induct. Load TJ=85°C 200 mJ

-25 to 125 °C

THERMAL DATA

Symbol Parameter Minidip SO20 Unit

R

th j-case

R

th j-amb

Thermal Resistance Junction to Case Max. °C/W
Thermal Resistance Junction to Ambient Max. 100 90 °C/W

3/12

L6375

ELECTRICAL CHARACTERISTCS

(VS=24V;Tj= –25 to +125°C, unless otherwise specified; pin numbering referred to Minidip package)

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

smin

V

V
Vsth1
Vsth2

Vshys

I

Iqo

Vith

V

iths

Vil

Vih
V

Iib

Idch

3 Supply Voltage for Valid

Diagnostic

3 Operative Supply Voltage 8 24 35 V

s

3 Undervoltage Threshold 1 (See fig. 2) 7 7.5 8 V
3 Undervoltage Threshold 2 (See fig. 2) 6.5 7 7.5 V
3 Under Voltage Hysteresis 300 500 700 mV
3 Quiescent Current Output Open 800 µA

q

3 Quiescent Current Output On 1.6 mA
7 Input Threshold Voltage 0.8 1.3 2 V
7 Input Threshold Hysteresis 50 400 mV
7 Input Low Level Voltage -7 0.8 V
7 Input High LevelVoltage Vs< 18V 2 V
7 Input High LevelVoltage Vs> 18V 2 15 V

ih

7 Input Bias Current Vi= -7 to 15V -250 250
5 Delay Capacitor Charging

Current

diag

I

= >0.5mA;V

ON DELAYpin shorted to
Ground

diag = 1.5V;

435V

s -3 V

A

µ

2.5 µA

Vdon

Iolk

Vol

cl

V

Isc

old

I

Voth1

Voth2

Vohys

Iosd

Output Voltage Drop

2 Output Leakage Current Vi= LOW; V
2 Output Low State Voltage Vi = HIGH; pin floating 0.8 1.5 V
2 Internal Voltage Clamp (Vs-V

2 Short Circuit Output Current
2 Open Load Detection Current Vi=Vih;T

5.6 Output Status Threshold 1
Voltage

5.6 Output Status Threshold 2
Voltage

5.6 Output Status Threshold
Hysteresis

5.6 Output Status Source Current V

I

= 500mA Tj=25°C

out

= 125°C

T

j

I

= 625mA T

out

= 125°C

T

j

)

o = 200mA

I

out

single pulsed =300µs

= 8 to 35V; Rl=2

V

s

(See fig. 1) 4.5 5 5.5 V

(See fig. 1) 4 4.5 5 V

(See fig. 1) 300 500 700 mV

out >Voth1 ;Vos = 2.5V 24mA

=25°C

j

=0 100 µA

out

48 53 58 V

Ω;

= 0 to +85°C136mA

amb

0.75 1.1 1.5 A

200
320
250
400

280
440
350
550

mV
mV
mV
mV

4/12

L6375

ELECTRICAL CHARACTERISTCS

(Continued)

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

osd

V

oslk

I

Vdgl

Idglk

5.6 Active Output Status Driver
Drop Voltage

5.6 Output Status Driver Leakage
Current

V

s–Vos

Tamb= 0to+85°C

out<Voth2;Vos

V

V

S

5.6 Diagnostic Drop Voltage D1 / D2 = L ; I

D1/D2=L;I

os = 2mA

;I

= 18 to 35V

diag
diag

0V

=

= 0.5mA
= 3mA

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

s

1.5 3 V

25

40

250

5 µA

VS= 15.6 to 35V

Tmax

Over Temperature Upper

150 °C

Threshold

Thys

AC OPERATION

tr -tf

td

dV/dt 2 Slew Rate (Rise and Fall Edge) 50pF < C

Over Temperature Hysteresis 20 °C

pin numbering referred to Minidip package)

(

2 Rise or Fall Time Vs = 24V;Rl=70Ω Rlto ground 20 µs

2 Delay Time Vs = 24V;Rl =70ΩRlto ground 5

< 2nF 7 1 15 V/µs

DON

µ

mV
mV

µ

A

s

t

ON

8 On time during Short Circuit

Condition

t

OFF

8 Off time during Short Circuit

Condition

f

max

Maximum Operating Frequency 25 KHz

SOURCE DRAIN NDMOS DIODE

V

f

I

fD

t

rr

t

fr

Forward On Voltage @ Ifsd = 625mA 1 1.5 V
Forward Peak Voltage t = 10ms; d = 20% 2 A
Reverse Recovery Time If= 625mA di/dt = 25A/µs 200 ns
Forward Recovery Time 50 ns

128

64

µ

µ

s/pF

s/pF

5/12

L6375

Figure 1. Switching Waveforms

V

in

50% 50%

t

d

V

out

90% 90%

50% 50%

10% 10%

t

r

t

d

t

f

D94IN127A

t

t

INPUTSECTION

An Single ended Input TTL/CMOS compatible with wide voltage range and high noise immunity (thanks to a
built in hysteresis) is available.

OVER TEMPERATURE PROTECTION(OVT)

An on-chip Over Temperature Protection provides an excellent protection of the device in extreme conditions.
Whenever the temperature - measured on a central portion of the chip- exceeds Tmax=150 C (typical value)
the device is shut off, and the DIAG2 output goes LOW. Normal operation is resumed as the chip temperature
(normally after few seconds) falls below Tmax-Thys= 130 C (typical value). The hysteresis avoid thats an inter­mittent behaviour take place.

UNDERVOLTAGEPROTECTION(UV)

The supply voltage is expected to range from 8 to 35 V. In this range the device operates correctly. To avoid
any misfunctioning the supply voltage is continuously monitored to provide an under voltage protection. As Vs
falls below Vsth-Vshys (typically 7.5 V, see fig.1) the output power MOS is switched off and DIAG1 and DIAG2
(see Diagnostic truthtable).Normaloperationis resumed as soon as Vs exceeds Vsth. The hysteretic behaviour
prevents intermittent operation at low supply voltage.

OVER CURRENTOPERATION

In order to implement a shortcircuit protection the output power MOS is driven in linear mode to limit the output
current to the Isc (1.1A typical value). This condition (current limited to the Iscvalue) lasts for a Ton time interval,
that can be set by means of a capacitor (Cdon) connected to the ON DELAY pin according to the following for­mula:

Ton = 1.28 msec/pF

for

50pF<Cdon< 2nF

After the Ton interval has expired the output power MOS is switched off for the Toff time interval with:

Toff = 64 ·Ton.

When also the Toff interval has expired, the out-put power MOS is switched ON. At this point in time two con-

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L6375

ditions may occur

A) the overload is still present, and then the output power MOS is again driven inlinear mode (limiting

the output current to Isc) for another Ton, starting a new cycle, or

B) the overload condition is removed, and the output power MOS is no longer driven in linear mode.

All these occurrences are presented on the DIAG2 pin (see fig 2).

We call this unique feature
in permanent overload conditions. Note that choosing the most appropriate value for the Ton interval (i.e. the
value of the Cdon capacitor) a delay (the Ton itself) will prevent that a misleading Short Circuit information is
presented on the DIAG2 output, when driving capacitive loads (that acts like short circuit in the very beginning)
or Incandescent Lamp (a cold filament has a very low resistive value). The Non Dissipative Short Circuit Pro­tection can be disabled (keeping Ton = 0 but with the output current still limited to Isc, and Diagnostic dis­abled)simply shorting to ground the the ON DELAY pin.

Figure 2. Non Dissipative Short Circuit Protection Operation

OUTPUT

CURRENT

I

sc

I

out

NonDissipativeShort CircuitProtection and itensures a very safe operation even

Time

Time

DIAG

(active low)

t<t

ON

t

ON

t

OFF

Short CircuitShort Circuit

t

ON

t

OFF

D94IN105

DIAGNOSTICLOGIC

The operating conditions of the device are permanently monitored and the following occurrences are signalled
via the DIAG1/DIAG2 open-drain output pins see: diagnostic Truth Table.

- Short Circuit versus ground.

- Short Circuit versus V

.

S

- Under Voltage(UV)

- Over Temperature (OVT)

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

DEMAGNETIZATION OF INDUCTIVELOADS

An internal zener diode, limiting the voltage across the Power MOS to between 50 and 60V (Vcl), provides safe
and fast demagnetization of inductive loads without external clamping devices. The maximum energy that can
be absorbed from an inductive load is specified as 200mJ (at T

=85°C)

j

7/12

L6375

DIAGNOSTICTRUTH TABLE

Diagnostic Conditions Input Output DIAG1 DIAG2

Normal Operation L

Open Load Condition (I

Short to V

S

Short Circuit to Ground (I
(pin ON-DELAY grounded)

Output DMOSOpen L

Overtemperature L

Sumplay Undervoltage (V

Figure 3. Inductive Load Equivalent Circuit

)L

o<Iold

)

O=ISC

S<Vsth2

)L

L

H

H

L

H

L

H

H
H

H

HH

L
L

H

L
L

H

L
L

H

+V

S

L

H
H

H
L

L
L

H
H

H
L

H
H

L
L

H
H

H
H

H
H

H
H

H
H

L
L

L
L

I

S

50V

V

S

RL

Figure 4. External Demagnetisation Circuit (versus ground)

V

S

R

S

DRIVER

UV

SHORT

CURRENT

LIMIT

CIRCUIT

CONTROL

OVC

OUTPUT

I

O

D95IN215

OUT

L

V

Z

8/12

VZ<V

cl (min)-VS (max)

D94IN112

Figure 5. External Demagnetisation Circuit (versus VS)

V

S

R

S

CURRENT

LIMIT

DRIVER

UV

CIRCUIT

SHORT

CONTROL

OVC

OUT

L6375

V

S

V

Z

V

S (max)<VZ<Vcl (min)

Figure 6. Application Schematic

IN+

Con

INPUT

+

-

1.4V
NON

SHORT CIRCUIT

OSC

OUTSTATUS

THERMAL

PROTECTION

UNDER

VOLTAGE

DISSIPATIVE

CHARGE

PUMP

DRIVER

CURRENT

LIMITATION

OPEN

LOAD

DETECTION

DIAGNOSTIC

D94IN111A

Transil, ST1,5KExx (IEC801-5)

V

S

OUT

10nF,
(IEC801-4, IEC801-4)

DIAG1

DIAG2

2.2µF, electrolytic

ceramic

3mA

OUTPUT STATUS

9/12

L6375

DIM.

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

A 2.35 2.65 0.093 0.104

A1 0.1 0.3 0.004 0.012

B 0.33 0.51 0.013 0.020

C 0.23 0.32 0.009

D 12.6 13 0.496 0.512

E 7.4 7.6 0.291 0.299

e 1.27 0.050

H 10 10.65 0.394 0.419

h 0.25 0.75 0.010 0.030

L 0.4 1.27 0.016 0.050

K0°(min.)8°(max.)

mm inch

0.013

OUTLINE AND

MECHANICAL DATA

SO20

B

e

D

1120

110

L

hx45°

A

K

A1 C

H

E

SO20MEC

10/12

L6375

DIM.

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

A 3.32 0.131

a1 0.51 0.020

B 1.15 1.65 0.045 0.065

b 0.356 0.55 0.014 0.022

b1 0.204 0.304 0.008 0.012

D 10.92 0.430
E 7.95 9.75 0.313 0.384

e 2.54 0.100
e3 7.62 0.300
e4 7.62 0.300

F 6.6 0.260

I 5.08 0.200
L 3.18 3.81 0.125 0.150
Z 1.52 0.060

mm inch

OUTLINE AND

MECHANICAL DATA

Minidip

11/12

L6375

Information furnished is believed tobe accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences
of useof suchinformationnor for anyinfringement of patentsor otherrightsof third partieswhich may resultfrom its use.No licenseis granted
by implicationor otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject
to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not
authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics.

The ST logo is a registered trademark of STMicroelectronics

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