ST L6376 User Manual
0.5 A high-side driver quad intelligent power switch
Features
■ Multipower BCD technology
■ 0.5 A four independent outputs
■ 9.5 to 35 V supply voltage range
■ Internal current limit
■ Non-dissipative over-current protection
■ Thermal shutdown
■ Under voltage lockout with hysteresys
■ Diagnostic output for under voltage, over
temperature and over current
■ External asynchronous reset input
■ Presettable delay for overcurrent
■ Diagnostic
■ Open ground protection
■ Immunity against burst transient
(IEC 61000-4-4)
■ ESD protection (human body model ± 2 kV)
Figure 1. Block diagram
220nF 22nF
V
V
CP
S
VCV
P
L6376
PowerSO-20
Description
This device is a monolithic quad intelligent power
switch in multipower BCD technology, for driving
inductive, capacitive or resistive loads. Diagnostic
for CPU feedback and extensive use of electrical
protections make this device inherently
indistructible and suitable for general purpose
industrial applications.
Table 1. Device summary
Order codes Package Packaging
L6376D PowerSO-20 Tube
L6376D013TR PowerSO-20 Tape and reel
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
DIAG
V
S
I
1
I
2
I
3
I
4
R
CHARGE PUMP
+
-
+
-
+
-
+
-
+
-
1.25V
V
CP
DRIVER
March 2008 Rev 6 1/18
www.st.com
18
Contents L6376
Contents
1 Maximum rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2 Pin connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3 Thermal characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
4 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
5 Overtemperature protection (OVT) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
6 Undervoltage protection (UV) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
7 Diagnostic logic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
8 Short circuit operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
9 Programmable diagnostic delay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
10 Reset input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
11 Demagnetization of inductive loads . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
12 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
13 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
2/18
L6376 Maximum rating
1 Maximum rating
Table 2. Absolute maximum ratings
Symbol Pin Parameter Value Unit
V
s
- V
V
s
out
V
id
I
id
I
i
6
16, 17
12, 13,
Supply voltage (DC) 40 V
Difference between supply voltage and output
voltage
internally limited
Externally forced voltage -0.3 to 7 V
Externally forced current ±1 mA
Channel input current (forced) ±2 mA
14, 15,
Supply voltage (tw ≤ 10 ms) 50 V
Channel input voltage -0.3 to 40 V
18
Output current (see also I
9
Output voltage internally limited
Energy inductive load (TJ =125 °C);
each channel
) internally limited
sc
200 mJ
Power dissipation internally limited
External voltage -0.3 to Vs+0.7 V
19
Externally forced current -10 to 10 mA
Ambient temperature, operating range -25 to 85 °C
Junction temperature, operating range (see
overtemperature protection)
-25 to 125 °C
V
I
V
E
P
I
diag
T
T
V
out
out
il
tot
diag
op
J
i
2, 3, 8,
T
stg
Storage temperature -55 to 150 °C
3/18
Pin connections L6376
2 Pin connections
Figure 2. Pin connections (top view)
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
Table 3. Pin description
N# Pin name Function
Positive supply voltage. An internal circuit, monitoring the supply voltage,
6V
7V
CP
maintains the IC in OFF-state until VS reaches 9 V or when VS falls under
S
8.5 V. The diagnostic is availlable since V
Switch driver supply. To minimize the output drop voltage, a supply of about
10 V higher than VS is required. In order to use the built-in charge pump,
connect a filter capacitor 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 68 nF have to be avoided.
GND
DIAG
R
OFF DELAY
ON DELAY
I4
I3
I2
I1
GND
= 5 V.
S
2, 3, 8, 9
1, 10,
11, 20
12,13,
14, 15
O1, O2,
O3, O
GND
, I2, I3, I
I
1
High side outputs. Four independently controlled outputs with built-in current
limitation.
4
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 output is held OFF
until the voltage at the corresponding input pin reaches 1.35 V and is turned
4
OFF when the voltage at the pin goes below 1.15 V.
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
16 ON DELAY
and the diagnostic activation are delayed. This procedure allows the driving
of hard surge current loads. The delay is programmed connecting a
capacitor (50 pF to 15 nF) versus ground with the internal time constant of
1.28 µs/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 switch is held OFF before the next attempt to
switch on again. The delay is programmed connecting a capacitor (50 pF to
15 nF) versus ground with the internal time constant of 1.28 µs/pF. Short
17
OFF
DELAY
circuiting this pin to ground the OFF delay is 64 times the ON delay.
18 R
Asyncronous reset input. This active low input (with hysteresis), switch off all
the outputs independently from the input signal. By default it is biased low.
4/18
L6376 Pin connections
Table 3. Pin description (continued)
N# Pin name Function
Diagnostic output. This open drain output reports the IC working condition.
19 DIAG
5V
4V
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 10 V higher than V
capacitor across pin 4 and pin 5. The suggested value assures a fast
C
transition and a minimum output drop voltage even in worse condition.
. To use this feature, connect a
S
Using the four channels contemporarily, values less than 6.8 nF have to be
avoided.
Bootstrapped voltage. At this pin is available the 11 V oscillation for the
P
charge pump, at a typical frequency of 200 kHz.
5/18
Thermal characteristics L6376
3 Thermal characteristics
Table 4. Thermal data
Symbol Parameter Value Unit
R
R
thJA
thJC
Thermal resistance, junction to ambient
(see thermal characteristics)
Thermal resistance junction-case 1.5 °C/W
50 °C/W
Note: Additional data on the PowerSO-20 can be found in Application note AN668
6/18
Loading...