ST L6375D User Manual
0.5 A high side driver intelligent power switch
Features
■ 0.5 A output current
■ 8 V to 35 V supply voltage range
■ Internal current limiting
■ Thermal shutdown
■ Open ground protection
■ Internal negative voltage clamping for fast
demagnetization
■ Differential inputs with large common mode
range and threshold hysteresis
■ Undervoltage lockout with hysteresis
■ Open load detection
■ Two diagnostic outputs
■ Output status LED driver
■ Non-dissipative short-circuit protection
■ Immunity against burst transient
(IEC 61000-4-4)
■ ESD protection (human body model ±2 kV)
L6375D
SO20
Description
The L6375D is a monolithic intelligent power
switch in BCDmultipower technology, for driving
inductive or resistive loads with controlled output
voltage slew rate and short-circuit protection.
An internal clamping diode enables the fast
demagnetization of inductive loads. Diagnostics
for CPU feedback and extensive use of electrical
protection make this device extremely rugged and
specially suitable for industrial automation
applications.
Table 1. Device summary
Order codes Op. temp. range Package Packaging
L6375D
-25 to +125 °CSO20
L6375DTR Tape and reel
December 2011 Doc ID 13678 Rev 3 1/16
Tu b e
www.st.com
16
Contents L6375D
Contents
1 Block diagram and pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2 Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.1 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.2 Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.3 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.4 Switching waveform . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.5 Input section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.6 Overtemperature protection (OVT) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.7 Undervoltage protection (UV) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.8 Overcurrent operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.9 Diagnostic logic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.10 Demagnetization of inductive loads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.11 Diagnostic truth table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3 Application circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
5 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
2/16 Doc ID 13678 Rev 3
L6375D Block diagram and pin description
1 Block diagram and pin description
Figure 1. Block diagram
Doc ID 13678 Rev 3 3/16
Block diagram and pin description L6375D
Figure 2. Pin connection (top view)
SO-8
1.1 Pin description
Table 2. Pin description
Pin n° Pin name Function
2 GND Ground
4 OUT High side output with built-in current limitation
6V
S
10 Output status
15 DIAG1
14 DIAG2
17 IN+ Comparator inverting input
19 ON-DELAY Programmable ON time interval duration during short-circuit operation
1, 3, 5, 7, 8,
9, 11, 12, 13,
N.C. Not connected
16, 18, 20
Supply voltage input; the value of the supply voltage is monitored to
detect undervoltage condition
This current source output is capable of driving an LED to signal the
status of the output pin. The pin is active (source current) when the
output pin is considered high (see Figure 4)
DIAGNOSTIC 1 output. This open drain reports the IC working
conditions (see Table 6: Diagnostic truth table)
DIAGNOSTIC 2 output. This open drain reports the IC working
conditions (see Table 6: Diagnostic truth table)
4/16 Doc ID 13678 Rev 3
L6375D Electrical specifications
2 Electrical specifications
2.1 Absolute maximum ratings
Table 3. Absolute maximum ratings
Symbol Parameter Value Unit
V
Supply voltage (tw < 10 ms) 50 V
S
V
Supply voltage (DC) 40 V
S
V
-V
Supply to output differential voltage Internally limited V
S
out
od Externally forced voltage -0.3 to 7 V
V
od Externally forced current ±1 mA
I
I
out Output current (see also I
V
P
TOT
V
diag
I
diag
I
Output voltage Internally limited V
out
Power dissipation Internally limited W
External voltage -0.3 to 40 V
Externally forced current -10 to 10 mA
i Input current 20 mA
Vi Input voltage -10 to V
Top Ambient temperature, operating range -25 to 85 °C
) Internally limited A
sc
+0.3 V
S
T
J
STG Storage temperature -55 to 150 °C
T
E
I
2.2 Thermal data
Table 4. Thermal data
Symbol Parameter Value Unit
R
thJA
R
thJP
1. When mounted on an FR4 printed circuit board with 0.5 cm2 of Cu (at least 35 mm thick).
Junction temperature, operating range
(see Section 2.6)
-25 to 125 °C
Energy inductive load TJ = 85 °C 200 mJ
Thermal resistance junction-ambient max.
(1)
65 °C/W
Thermal resistance junction-pins max. 15 °C/W
Doc ID 13678 Rev 3 5/16
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