ST L6374 User Manual

L6374

L6374

INDUSTRIAL QUAD LINE DRIVER

FOUR INDEPENDENT LINE DRIVERS WITH 100 mA UP TO 35V OUTPUTS

INPUT SIGNALS BETWEEN -7V AND +35V, WITH PRESETTABLE THRESHOLD PUSH-PULL OUTPUTS WITH THREE STATE CONTROL AND TRUE ZERO CURRENT BETWEEN VS AND GROUND

CURRENT LIMITING ON EACH OUTPUT EFFECTIVE IN THE FULL ºGROUND TO VSº OUTPUT VOLTAGE RANGE

OUTPUT VOLTAGE CLAMP TO VS AND TO GROUND

OVERTEMPERATURE AND UNDERVOLTAGE PROTECTIONS

DIAGNOSTIC FOR OVERTEMPERATURE, UNDERVOLTAGE AND OVERCURRENT

PRESETTABLE DELAY FOR OVERCURRENT DIAGNOSTIC

HIGH SPEED OPERATION: UP TO 300kHz WITH 35V SWING

ADVANCE DATA

POWERDIP 16+2+2

SO 16+2+2

ORDERING NUMBER: L6374DP (POWERDIP 16+2+2) L6374FP (SO 16+2+2)

DESCRIPTION

The L6374 is especially designed to be used as a line driver in industrial control systems based on the 24V signal levels (IEC1131, 24VDC).

BLOCK DIAGRAM

December 1994

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This is advanced information on a new product now in development or undergoing evaluation. Details are subject to change without notice.

L6374

ABSOLUTE MAXIMUM RATINGS

Symbol	Pin	Parameter	Value	Unit
VS	1	Supply Voltage (tW < 10ms)	50	V
		Supply Voltage (DC)	40	V
Vilog	12, 13	Logic Input Voltage (DC)	-0.3 to 7	V
Iilog		Logic Input forced current, per pin	±1	mA
Ii	7, 8,	Channel Input Current (forced)	±2	mA
Vi	9, 10	Channel Input Voltage	- 7 to 35	V
Iout	3, 4,	Output Current (forced, apart from inductive load)	±100	mA
	17, 18	Output Current (forced, apart from inductive load)	±1	A
		same tW < 10ms
Vout		Output Voltage (forced, not resulting from an inductive	-0.3 to VS +0.3	V
		kick)
Iset	11	Setting pin forced current	±1	mA
Vset		Setting pin forced voltage	-0.3 to 5	V
Vdiag	14	External voltage	-0.3 to 35	V
Idiag		Externally forced current	-10 to 10	mA
VC3	13	Voltage on the delay capacitor, externally forced	-0.3 to 4.5	V
Top		Ambient temperature, operating range	-25 to 85	°C
Tj		Junction temperature, operating range (see	-25 to 125	°C
		Overtemperature Protection)
Tstg		Storage temperature	-55 to 150	°C

PIN CONNECTION (Top view)

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							L6374
ELECTRICAL CHARACTERISTICS (VS = 24V; Tj = -25 to 125°C; unless otherwise specified.)
DC OPERATION
Symbol	Pin	Parameter	Test Condition	Min.	Typ.	Max.	Unit
VS	1	Supply Voltage		10.8		35	V
Vsh		UV UpperThreshold		9		10.8	V
Hys1		UV Hysteresis		250	450	650	mV
Iqsc		Quiescent Current	Outputs Open		3	5	mA
Vref	11	Input Comparators Reference	Reference pin Floating	1.05	1.25	1.35	V
		Voltage
Iref		Sink/Source Current on	Vref = 0V	-30	-20	-10	μA
		Reference Pin	Vref = 5V	10	20	30	μA
Vth	7, 8,	Comparator Threshold with	VS = 9 to 12V	-0.2		2.0	V
	9, 10	External Bias	VS = 12 to 35V	-0.2		5.0	V
Vil		Input Low Level	VREF Externally Biased	-7		VREF	V
						-0.2
			Pin VREF Floating	-7		0.8	V
Vih		Input High Level	VREF Externally Biased	VREF		35	V
				+0.2
			Pin VREF Floating	2		35	V
Vi		Input Voltage (Operative Range)		-7		35	V
Ibias		Input Bias Current	0 < Vi < VS	-1		1	μA
			Vi = -7V	-1	-0.5	-0.1	mA
Hys2		Input Comparators Hysteresis	See Analog Inputs Sections	100	200	350	mV
Th		OVT Upper Threshold			170		°C
HT		OVT Hysteresis			20		°C
Isc	3, 4,	Current Limit	Vi = -7 to VS; Vout = 0 to VS;	110	200	300	mA
Von	17, 18	Internal Voltage Drop @ Rated	Iout = ±100mA; Sourced @ High		400	600	mV
		Current	Output, Sunk @ Low Output
			Tj = 125°C
			Same, Tj = 25°C		250	400	mV
Ilkg		Output 3-State Leakage Current	Vout = 0 to VS	-25		25	μA
Vin	12	Push-Pull Mode Request		-0.2		0.8	V
		3-State Mode Request		2		5.5	V
Iin		Input Current	Vi = 0V		10	25	μA
Idlkg	14	Diagnostic Output Leakage	Diagnostic Off; Vdiag = 24V			5	μA
Vdiag		Diagnostic Output Voltage Drop	Idiag =5mA		200	500	mV

AC OPERATION (VS = 10.8 to 35V; Tj = -25 to 125°C; Iout = 100mA; unless otherwise specified; see switching waveforms diagrams)

	Symbol	Pin	Parameter	Test Condition	Min. Typ. Max. Unit
	tdr	7 to 4	Delay Time on Rising Edge	Rl to ground	1000	1500	ns
		8 to 3		Rl to VS	500	1000	ns
		9 to18
	tdf		Delay Time on Falling Edge	Rl to ground	500	1000	ns
		10to17
				Rl to VS	1000	1500	ns
	tr	3, 4,	Rise Time	Rl to ground	120	250	ns
		17, 18		Rl to VS	120	250	ns
	tf		Fall Time	Rl to ground	150	300	ns
				Rl to VS	150	300	ns

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L6374

THERMAL DATA

Symbol	Parameter	DIP20	SO20	Unit
Rth j-pin	Thermal Resistance, Junction to Pin	12	17	°C/W
Rth j-amb1	Thermal Resistance, Junction to Ambient (see Thermal	40	65	°C/W
	Characteristics)
Rth j-amb2	Thermal Resistance, Junction to Ambient (see Thermal	50	80	°C/W
	Characteristics)

THERMAL CHARACTERISTICS

Rth j-pins

POWERDIP. The thermal resistance is referred to the thermal path from the dissipating region on the top surface of the silicon chip, to the points along the four central pins of the package, at a distance of 1.5 mm away from the stand-offs.

SO. Similarly, the reference point is the knee on the four central pins, where the pins are upwardly bent and the soldering joint with the PCB footprint can be made.

Rth j-amb1

If a dissipating surface, thick at least 35 μm, and with a surface similar or bigger than the one shown, is created making use of the printed circuit.

Figure 1: Printed Heatsink

Such heatsinking surface is considered on the bottom side of an horizontal PCB (worst case).

Rth j-amb2

If the power dissipating pins (the four central ones), as well as the others, have a minimum thermal connection with the external world (very thin strips only) so that the dissipation takes place through still air and through the PCB itself.

It is the same situation of point above, without any heatsinking surface created on purpose on the board.

Additional data for the PowerDip package can be found in:

Application Note 9030:

Thermal Characteristics of the PowerDip 20,24 Packages Soldered on 1,2,3 oz. Copper PCB

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