ST TDE1767, TDE1787 User Manual

TDE1767

TDE1787

Interface circuit (relay and Lamp-driver)

Features

■Open ground protection

■High output current

■ Adjustable short-circuit protection

■ Internal thermal protection with external reset

■ Large supply voltage range

■ Alarm output

DIP-8

■ Input voltage can be higher than VCC

■Output voltage can be lower than ground (VCC - VO ≤ VCC[max])

Description

The TDE1767, TDE1767A, TDE1787, TDE1787A are a monolithic amplifiers designed for high current and high voltage applications, specifically to drive lamps, relays, stepping motors.

The devices are assentially blow-out proof. The output is prois protected from short-circuits with the positive supply or drive. In addition thermal shut down is provited to keep the IC from overheathing.

If internal dissipation becomes too high, the driver will shut down to prevent excessive heating. The output stays null after the overheating is off, if the reset input is low. If high the output will alternatively switch-on and off until the overload is removed.

The devices operates over a wide range voltages from standard 15V operational amplifier supplies to the single +6V or +48V used for industrial electric systems. Input voltages can be higher than in the VCC.

An alarm output suitable for driving a LED is provited. This LED, normally on (if referred to ground), will die out or flash during an overload depending on the state of the reset input.

The output is low in open ground conditions.

Table 1.	Device summary
	Part number	Package	Packaging
	TDE1767DP	DIP8	Tube
	TDE1767ADP	DIP8	Tube
	TDE1787DP	DIP8	Tube
	TDE1787ADP	DIP8	Tube
March 2007		Rev 2	1/16

www.st.com

Contents	TDE1767 - TDE1787

Contents

1	Pin connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		. 3
2	Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		3
	2.1	Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	3
	2.2	Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	3
3	Electrical characteristcs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		4
4	Schematic diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		6
5	Typical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		7
6	Typical application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		9
7	Using alarm output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		11
8	Mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		13
9	Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		15

2/16

TDE1767 - TDE1787	Pin connections

1 Pin connections

Figure 1. Pin connection (top view)

ALARM OUTPUT	1	8	CURRENT LIMIT
INVERTING INPUT	2	7	VCC
NON INVERTING INPUT	3	6	OUTPUT
GND	4	5	RESET
		D03IN1475

2 Maximum ratings

2.1Absolute maximum ratings

	Table 2.	Absolute maximum ratings
	Symbol	Parameter	TDE1767A	TDE1767	Unit
			TDE1787A	TDE1787
	VCC	Supply voltage	60	50	V
	VID	Input differential voltage	60	50	V
	Vl	Input voltage	- 10 to + 60	- 10 to + 50	V
	IO	Output current	1.3	1.2	A
	Vl(reset)	Reset input voltage	- 0.5 to + 60	- 0.5 to + 50	V
	IOA	Alarm output current	- 10 to + 20	- 10 to + 20	mA
	Ptot	Power dissipation	Internally Limited		mW
	Toper	Operating ambient temperature	- 25 to + 85	- 25 to + 85	°C
		range
	Tstg	Storage temperature range	- 65 to + 150	- 65 to + 150	°C

2.2Thermal data

	Table 3.	Thermal data
	Symbol	Parameter	Value	Unit
	Rth(JC)	Thermal resistance junction-case	max 30	°C/W
	Rth(JA)	Thermal resistance junction-ambient	max 80	°C/W
Note:	Devices bonded on a 40 cm2 glass-epoxy printed circuit 0.15 cm thick with 4 cm2 of copper.

3/16

Electrical characteristcs	TDE1767 - TDE1787

3 Electrical characteristcs

TDE1767A: - 25°C ≤ TA ≤ 85°C, 6V ≤ VCC ≤ 55V, Io ≤ 500mA, TJ ≤ 150°C

TDE1767: - 25°C ≤ TA ≤ 85°C, 6V ≤ VCC ≤ 45V, Io ≤ 500mA, TJ ≤ 150°C

TDE1787A: - 25°C ≤ TA ≤ 85°C, 6V ≤ VCC ≤ 55V, Io ≤ 300mA, TJ ≤ 150°C

TDE1787: 25°C ≤ TA ≤ 85°C, 6V ≤ VCC ≤ 45V, Io ≤ 300mA, TJ ≤ 150°C

Unless otherwise specified.

Table 4.	Electrical characteristics
Symbol	Parameter	Test condition	Min.	Typ.	Max.	Unit
VIO	Input offset voltage	(note 1)		2	50	mV
		(measured on pin 4)
		Output high (TA = 25°C)		5.8	8	mA
ICC	Power supply current	Output high		5	7	mA
		(VCC = VCCmax, (TJ = 150°C)
		Output low		1.5	4	mA
		(VCC = VCCmax, (TA = 25°C)
IIB	Imput bias current			15	100	µA
VCM	Common-mode input	TDE1787A, TDE1767A	1		60	V
	voltage range	TDE1787, TDE1767	1		45	V
		Vref ≥ 1V (figure1, note2)
VI	Input voltage range	TDE1787A, TDE1767A	1		60	V
		TDE1787, TDE1767	1		45	V
	Short circuit output	VCC = 35V, t = 10ms
ISC		TDE1767A: RSC = 0.22Ω		700		mA
	current
		TDE1787A: RSC = 0.33Ω		380		mA
Vsense	Output limit sense	VO = VCC -2V, t = 10ms	130	150	170	mV
	voltage
Vsense	Output limit sense	VO = 0V, t = 10ms	120	140	165	mV
	voltage
		Output high VI+- VI- ≥ 50mV;
		RSC = 0; VCC = 30V
		TDE1787A, TDE1767A:				V
		TJ = 25°C		1	1.1
V	Output saturation voltage	TDE1787, TDE1767: T = 25°C		1	1.2	V
O(sat)		J
		TDE1787A, TDE1767A:
		TJ = 150°C		1.1	1.2	V
		TDE1787, TDE1767:		1.1	1.3	V
		TJ = 150°C
IOL	Output leakage current	Output low			100	µA

4/16

TDE1767 - TDE1787				Electrical characteristcs
	Table 4.	Electrical characteristics (continued)
	Symbol	Parameter	Test condition	Min.	Typ.	Max.	Unit
			Output source current	-4	-5		mA
			VAH = VCC-2.5V
		Available alarm output
	IA		Output sink current
		current		5	10		mA
			(in thermal shut-down)
			VA = 1.4V
	Ireset	Reset input current			2	40	µA
	Vth-reset	Reset threhold			1.4		A
		Output leakage current	open ground		10		µA

Note: 1 The offset voltage given is the maximum value of different input voltage reguired to drive the output voltage whitin 2 V of the ground or the supply voltage.

2 Input voltage range is indipendent of the supply voltage.

5/16