ST TDE3247 User Manual

TDE3247

Interface circuit (relay and lamp driver)

Features

High output current

Adjustable short-circuit protection to ground

Internal thermal protection with hysteresis to avoid the intermediate output levels

Large supply voltage range: 8 to 30V

Short-circuit protection to VCC

SO-14

Open ground protection

 

Description

The TDE3247 is a monolithic amplifier designed for high current and high voltage applications, specifically to drive lamps, relays and stepping motors.

The Device is essentialy blow-out proof. Current limiting is available to limit the peak output current to a safe value, the adjustment only required an external resistor.

In addition, thermal shut-down is provided to keep the IC from overheating.

If external dissipation becomes too high, the driver will shut-down to prevent excessive heating.

The output is also protected against short-circuit with the positive power supply.

The device operates over a wide range of supply voltage from standard ±15V operational amplifier supplies down to the single 12V or 24V used for industrial electronic systems.

Order codes

Part number

Package

Packaging

 

 

 

 

 

TDE3247FP

SO-14

Tube

 

 

 

 

 

TDE3247FPT

SO-14

Tape & Reel

 

 

 

 

 

June 2006

Rev 2

1/15

 

 

 

 

 

 

www.st.com

Contents

TDE3247

 

 

Contents

1

Schematic diagram and pin connections . . . . . . . . . . . . . . . . . . . . . . .

. 3

2

Electrical ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. 4

3

Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5

 

3.1

Electrical characteristics (curves) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6

4

Application circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

8

5

Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

9

6

Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

14

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ST TDE3247 User Manual

TDE3247

Schematic diagram and pin connections

 

 

1 Schematic diagram and pin connections

Figure 1. Schematic diagram

Figure 2. Pin connections

3/15

Electrical ratings

TDE3247

 

 

2 Electrical ratings

Table 1.

Absolute maximum ratings

 

 

Symbol

Parameter

Value

Unit

 

 

 

 

VCC

Supply Voltage

36

V

VO

Differential Input Voltage

36

V

 

 

 

 

VI

Input Voltage

36

V

IO

Output Current

300

mA

 

 

 

 

PTOT

Power Dissipation

Internally limited

W

Toper

Ambient Temperature Range

–25 to 85

° C

TSTG

Storage Temperature Range

–65 to +150

° C

Table 2.

Thermal data

 

 

 

Junction-ceramic Substrate

 

 

Rth

(case glued to substrate)

90

°C/W

 

For SO-14

 

 

 

 

 

 

 

Junction-ceramic Substrate

 

 

Rth

(case glued to substrate, substrate

65

°C/W

temperature maintened constant)

 

For SO-14

 

 

 

 

 

 

4/15

TDE3247 Electrical characteristics

3

Electrical characteristics

 

 

 

 

 

 

(-25°C TA 85°C, 8V VCC 30V, IO 150mA, TJ 150°C, unless otherwise specified) Note: 1

 

Table 3.

Electrical characteristics

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Symbol

Parameter

Test Conditions

Min.

Typ.

Max.

Unit

 

 

 

 

 

 

 

 

 

 

 

 

VIO

Input Offset Voltage

Note 2

 

 

2

50

mV

 

 

IIB

Input Bias Current

 

 

 

0.1

1.5

µA

 

 

 

 

 

VCC = 24V, IO = 0A,

 

 

 

 

 

 

ICC

Supply Current

Tamb = 25°C

 

 

 

 

 

 

 

High Level

 

 

4

10

mA

 

 

 

 

 

Low Level

 

 

2

 

mA

 

 

 

 

 

 

 

 

 

 

 

 

 

VCM

Common Mode Input

 

 

2

 

VCC-2

V

 

 

Voltage Range

 

 

 

 

 

ISC

Short-circuit Current

VCC = 24V, Tamb = 25°C

 

250

 

mA

 

 

RSC = 3.3Ω

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Output Saturation Voltage

(VI+- VI-) ≤50mV

 

 

 

 

 

V

CC

- V

I = 150mA, R

= 0

 

1.2

1.8

V

 

 

O

(Output High)

O

SC

 

 

 

 

 

 

 

 

 

TJ = 25°C

 

 

 

 

 

 

 

 

 

Output Leakage Current

VO = 0V, VCC = 24V

 

 

 

 

 

 

IOL

TJ = 25°C

 

 

1

100

µA

 

 

(Output Low)

 

 

 

 

 

 

 

TJ = 85°C

 

 

 

500

µA

 

 

IOS

Minimum Short-current

Tamb = 25°C, VCC = 24V

 

50

 

mA

 

 

Output Current

RSC =

 

 

 

 

 

 

 

 

 

 

 

 

Note: 1 For operating at high temperatures, the device must be derated based on a 150°C maximum junction and a junction to ambient thermal resistance of 110°C/W

2The offset voltage given in 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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