ST L6375D User Manual

L6375D

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)

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 °C	SO20	Tube
L6375DTR					Tape and reel

December 2011

Doc ID 13678 Rev 3

1/16

www.st.com

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)

1.1Pin description

Table 2.	Pin description
Pin n°		Pin name	Function
2		GND	Ground
4		OUT	High side output with built-in current limitation
6		VS	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
10		Output status	status of the output pin. The pin is active (source current) when the
			output pin is considered high (see Figure 4)
15		DIAG1	DIAGNOSTIC 1 output. This open drain reports the IC working
			conditions (see Table 6: Diagnostic truth table)
14		DIAG2	DIAGNOSTIC 2 output. This open drain reports the IC working
			conditions (see Table 6: Diagnostic truth table)
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

4/16	Doc ID 13678 Rev 3

L6375D	Electrical specifications

2 Electrical specifications

2.1Absolute maximum ratings

	Table 3.	Absolute maximum ratings
	Symbol	Parameter	Value	Unit
	VS	Supply voltage (tw < 10 ms)	50	V
	VS	Supply voltage (DC)	40	V
	VS -Vout	Supply to output differential voltage	Internally limited	V
	Vod	Externally forced voltage	-0.3 to 7	V
	Iod	Externally forced current	±1	mA
	Iout	Output current (see also Isc)	Internally limited	A
	Vout	Output voltage	Internally limited	V
	PTOT	Power dissipation	Internally limited	W
	Vdiag	External voltage	-0.3 to 40	V
	Idiag	Externally forced current	-10 to 10	mA
	Ii	Input current	20	mA
	Vi	Input voltage	-10 to VS +0.3	V
	Top	Ambient temperature, operating range	-25 to 85	°C
	TJ	Junction temperature, operating range	-25 to 125	°C
		(see Section 2.6)
	TSTG	Storage temperature	-55 to 150	°C
	EI	Energy inductive load TJ = 85 °C	200	mJ

2.2Thermal data

Table 4.	Thermal data
Symbol	Parameter		Value	Unit
RthJA	Thermal resistance junction-ambient	max. (1)	65	°C/W
RthJP	Thermal resistance junction-pins	max.	15	°C/W

1. When mounted on an FR4 printed circuit board with 0.5 cm2 of Cu (at least 35 mm thick).

Doc ID 13678 Rev 3

5/16