ST L6376 User Manual
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L6376
0.5A HIGH-SIDE DRIVER
QUAD INTELLIGENTPOWERSWITCH
0.5 AFOURINDEPENDENTOUTPUTS
9.5 TO 35 V SUPPLYVOLTAGERANGE
INTERNALCURRENT LIMIT
NON-DISSIPATIVE OVER-CURRENT PRO-
TECTION
THERMALSHUTDOWN
UNDER VOLTAGE LOCKOUT WITH HYS-
TERESYS
DIAGNOSTIC OUTPUT FOR UNDER VOLT-
AGE, OVER TEMPERATURE AND OVER
CURRENT
EXTERNAL ASYNCHRONOUS RESET INPUT
PRESETTABLE DELAY FOR OVERCURRENT DIAGNOSTIC
OPENGROUND PROTECTION
IMMUNITY AGAINST BURST TRANSIENT
(IEC801-4)
ESDPROTECTION (HUMAN BODY MODEL ±
2KV)
BLOCK DIAGRAM
220nF 22nF
V
V
S
CP
VCV
P
MULTIPOWERBCD TECHNOLOGY
POWERDIP
16+2+2
ORDERING NUMBERS:L6376 (DIP
PowerSO20
L6376PD (PSO)
DESCRIPTION
This device is a monolithic quad Intelligent Power
Switch in MultipowerBCD Technology, for driving
inductive,capacitive or resistive loads. Diagnostic
for CPU feedbackand extensive use of electrical
protections make this device inherently indistructible and suitable for general purpose industrial applications.
November 1996
DIAG
V
S
I
1
I
2
I
3
I
4
R
CHARGE PUMP
+
-
+
-
+
-
+
-
+
-
1.25V
V
CP
DRIVER
V
S
R
S
UV
SHORT
CIRCUIT
CONTROL
OVT UV
CURRENT
LIMIT
OVC
OSC
GND
O
1
O
2
O
3
O
4
OFF DELAY
OFF
OSC
C
DOFF
D94IN076C
ON DELAY
C
DON
ON
1/12
L6376
ABSOLUTE MAXIMUM RATINGS (Pinnumering referredto PowerSO20package)
Symbol Pin Parameter Value Unit
V
s
Supply Voltage (t
6
Supply Voltage (DC) 40 V
V
s-Vout
id
V
I
id
I
i
16,17
12,13 ,
Difference between supply voltage and output voltage internally limited
Externally Forced Voltage -0.3 to 7 V
Externally Forced Current
Channel Input Current (forced) ±2mA
14,15 ,
i Channel Input Voltage -0.3 to 40 V
V
18
< 10ms) 50 V
w
1mA
±
I
out
out Output Voltage internally limited
V
E
il
P
tot
diag
V
I
diag
T
op
T
j
stg Storage temperature -55 to 150 °C
T
2, 3,
8, 9
Output Current (see also I
Energy Inductive Load (Tj=125°C); Each Channel 200 mJ
Power Dissipation internally limited
External voltage -0.3 to V
19
Externally forced current -10 to 10 mA
Ambient temperature, operating range -25 to 85 °C
Junction temperature, operating range (see
Overtemperature Protection)
) internally limited
sc
+0.7 V
s
-25 to 125
PIN CONNECTIONS (Topview)
V
V
CP
O
O
GND
GND
1
S
2
3
2
4
1
5
6
I
7
1
I
8
2
I
9 OFF DELAY
3
I
10 ON DELAY11
4
D93IN030B
20
19
18
17
16
15
14
13
12
V
C
V
P
O
3
O
4
GND
GND
DIAG
R
GND
O4
O3
VP
VC
V
S
VCP
O2
O1
GND 10
1
2
3
4
5
6
7
8
9
D95IN217
20
19
18
17
16
15
14
13
12
11
GND
DIAG
R
OFF DELAY
ON DELAY
I4
I3
I2
I1
GND
C
°
2/12
POWERDIP
PowerSO20
PIN DESCRIPTION(Pin numering referred to PowerSO20package).
No Pins Function
Positive supply voltage.
6V
7V
2, 3,
8, 9
1, 10,
11, 20
12,13,
14, 15
S
CP
O
1,O2,O3,O4
GND
I
1,I2,I3,I4
16 ON DELAY
17 OFF DELAY
18 R
19 DIAG
5V
4V
C
P
An internal circuit, monitoring the supply voltage, maintainsthe IC in off-state until V
reaches 9V or when VSfalls under 8.5V.
The diagnostic is availlable since V
S
= 5V.
Switch driver supply.
To minimize the output drop voltage, a supply of about 10V higher than V
order to use the built-in charge pump, connect a filtercapacitor from pin1 to pin.
The suggested value assures a fast transition and a low supply ripple even in worse
condition. Using the four channels contemporarily, values less than 68nF haveto be
avoided.
High side outputs.
Four independently controlled outputs with built-in current limitation.
Ground and power dissipating pins.
These pins are connected to the bulk ground of the IC, so are useful for heat dissipation.
Control inputs.
Four independent control signals. The outputis held off until the voltage at the
corresponding input pinreaches 1.35V and is turned off when the voltage at the pin goes
below 1.15V.
Programmable ON duration in short circuit.
If an output is short circuited to ground or carryng a current exceeding the limit, the output
is turned-off and the diagnostic activation are delayed. This procedure allows the driving
of hard surge current loads.
The delay is programmed connecting a capacitor (50pF to 15nF) versus ground with the
internal timeconstant of 1.28µs/pF. The function can be disabled short circuiting this pin
to ground.
Programmable OFF duration in short circuit.
After the short circuit or overcurrent detection, the switchis held off before the next
attempt to switch onagain.
The delay is programmed connecting a capacitor (50pF to 15nF) versus ground with the
internal timeconstant of 1.28µs/pF.
Short circuiting this pin to ground the OFF delay is 64 times the ON delay.
Asyncronous reset input.
This active low input (with hysteresis), switch off all the outputs independently from the
input signal. By default itis biased low.
Diagnostic output.
This open drain output reports the IC working condition. The bad condition (as
undervoltage, overcurrent, overtemperature) turns the output low.
Pump oscillator voltage.
At this pin is available the built-in circuitry to supply the switch driver at about 10V higher
. To use thisfeature, connect a capacitor across pin 4 and pin 5.
than V
S
The suggested value assures a fast transition and a minimum output drop voltage even in
worse condition. Using the four channels contemporarily, values less than 6.8nF have to
be avoided.
Bootstrapped voltage.
At this pin is available the 11V oscillation for the charge pump, at a typical frequency of
200kHz.
is required. In
S
L6376
S
3/12
L6376
ELECTRICALCHARACTERISTICS(Vs= 24V;Tj= -25 to 125°C; unlessotherwise specified.)
DC OPERATION(Pin numeringreferred to PowerSO20package).
Symbol Pin Parameter Test Condition Min. Typ. Max. Unit
s
V
V
sth
V
shys
qsc Quiescent Current Outputs ON, No load 3 5 mA
I
V
il
V
ih
I
bias
ihys Input Comparators Hysteresis 100 200 400 mV
V
Θ
lim
Θ
H
I
sc
I
olk
V
cl
V
ol
dlkg
I
V
diag
I
dch
12,13,
14,15,
16,17
Supply Voltage 9.5 24 35 V
UV UpperThreshold 8.5 9 9.5 V
6
UV Hysteresis 200 500 800 mV
Input Low Level 0 0.8 V
Input High Level 2 40 V
=0V -5 -1 0
V
Input Bias Current
18
i
= 40V 0 5 20 µA
V
i
OVT Upper Threshold 150
Threshold Hysteresis 20 30 °C
Short Circuit Current V
Output Voltage Drop
2, 3,
8, 9
Output Leakage Current Vo=0V; Vi<0.8V 100
Internal Voltage Clamp
each Output)
(V
s-Vo
Low State Output Voltage Vi=Vil;RL=
=9.5 to 35V; Rl=2Ω 0.65 0.9 1.2 A
s
=500mA; Tj=25°C 320 500 mV
I
out
out =500mA; T
I
I
=100mA
o
single pulsed T
=125°C 460 640 mV
j
p
∞
=300µs
47 52 57 V
0.8 1.5 V
Diagnostic Output Leakage Diagnostic Off 25 µA
19
Diagnostic Output Voltage
Drop
Delay Capacitors Charge
Current
= 5mA 1.5 V
I
diag
40
A
µ
C
°
A
µ
A
µ
4/12
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