ST TDE1747 User Manual

TDE1747

Interface circuit - relay and lamp-driver

Features

■Open ground protection

■High output current

■Adjustable short-circuit protection to ground

■Thermal protection with hysteresis to avoid the intermediate output levels

■ Large supply voltage range: + 8V to +45V				SO14	DIP-8
■ Short-circuit protection to VCC
Description
The TDE1747 is a monolithic comparator
designed for high current and high voltage
applications, specifically to drive lamps, relays,
stepping motors.
This device is essentially blow-out proof. Current
limiting is available to limit the peak output current
to safe values.
Adjustment only requires one external resistor. In
addition, thermal shut down is provided to keep
the IC from overheating. If internal dissipation
becomes too high, the driver will shut down to
prevent excessive heating. TDE1747 has an open
ground protection. The output is also protected
from shortcircuits with the positive power supply.
The device operates over a wide range of supply
voltages from standard ± 15V operational
amplifier supplies down to the single +12V or
+24V used for industrial electronic systems.		.
Order codes
Part number	Temp range, ° C			Package	Packing
TDE1747DP	-25°C to +85°C			DIP-8	Tube
TDE1747FP	-25°C to +85°C			SO14	Tube
TDE1747FPT	-25°C to +85°C			SO14	Tape and reel
September 2006		Rev 1			1/17
					www.st.com

Contents

TDE1747

Contents

1 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

1.1 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1.2 Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

2 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

3 Pin connections and schematic diagrams . . . . . . . . . . . . . . . . . . . . . . . . . 5

4 Typical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

5 Typical applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

6 Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

7 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

8 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

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TDE1747

Maximum ratings

1 Maximum ratings

1.1Absolute maximum ratings

Table 1.	Absolute maximum ratings
Symbol	Parameter	Value	Unit
VCC	Supply voltage	50 (1)	V
VI	Input voltage	50	V
VID	Differential input voltage	50	V
IO	Output current	1	A
Ptot	Power dissipation (TA = +25°C)	Internally Limited	W
Toper	Operating Free–air Temperature Range	– 25 to + 85	°C
TSTG	Storage temperature range	– 65 to + 150	°C

1. 60V, t ≤10ms

1.2Thermal data

	Table 2.	Thermal data
	Symbol	Description	Value	Unit
	RthJA	Thermal Resistance Junction-ambient	120	°C/W
	RthJC	Thermal Resistance Junction-case	50	°C/W
	Rth	Junction-ceramic Substrate (case glued to substrate) SO14	90	°C/W
	Rth	Junction-ceramic Substrate (case glued to substrate, substrate	65	°C/W
		temperature maintained constant) SO14

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Electrical characteristics

TDE1747

2	Electrical characteristics
	TJ = −25 to +85°C, VCC = 8 to 45 V, unless otherwise specified (note 1)
Table 3.	Electrical characteristics
Symbol	Parameter	Min		Typ	Max	Unit
VIO	Input offset voltage (2)	–		2	50	mV
IIB	Input bias current	–		0.1	1.5	mA
	Supply Current (VCC = +24V, IO = 0)
ICC	High level	–		4	6	mA
	Low level	–		2	4	mA
VI(max)	Common–mode input voltage range	2		–	VCC–2	V
	Short–circuit Current Limit (TA = 25°C, VCC = +24V)
ISC	RSC= 1.5Ω	–		480	–	mA
	RSC= ∞	–		35	50	mA
	Output saturation voltage (output low)
VCC–VO	(VI+– VI- ≥ 50mV, RSC = 0, IO = 300mA, )
	TJ = + 25°C	–		1.15	1.4	V
	TA = + 25°C	–		1.05	1.3	V
IOL	Output leakage current (output high)	–		0.01	10	µA
	(VO = 0, VCC = +24V, TA = + 25°C)

1.For operating at high temperature, the TDE1747, must be derated based on a +150°C maximum junction temperature and junction-ambient thermal resistance of 120°C/W for DIP-8 and 100°C/W for the SO14.

2.The offset voltage given is the maximum value of input voltage required to drive the output voltage within 2V of the ground or the supply voltage.

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TDE1747

Pin connections and schematic diagrams

3 Pin connections and schematic diagrams

Figure 1. Pin connections (top views)

Figure 2. Schematic diagram

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Pin connections and schematic diagrams

TDE1747

Figure 3. Test circuit

Figure 4. Simplified schematic

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