Datasheet TDE1798DP Datasheet (SGS Thomson Microelectronics)

0.5A INTELLIGENT POWERSWITCH

HIGHOUTPUTCURRENT500mA
SHORT-CIRCUIT PROTECTION UP TO

= +35V

V

CC

INTERNAL THERMAL PROTECTION WITH
EXTERNAL RESET AND SYNCRONIZATION
CAPABILITY

OPENGROUNDPROTECTION
OUTPUT VOLTAGE CAN BE LOWER THAN

GROUND FOR FAST INDUCTIVE LOAD DE­MAGNETIZATION

DIFFERENTIAL INPUTS FOR ANY LOGIC
SYSTEMCOMPATIBILITY

INPUT VOLTAGECAN BEHIGHERTHAN V
LARGE SUPPLY VOLTAGE RANGE FROM

6V TO 35V
SINK AND SOURCEALARM OUTPUTS
NO NEED FOR EXTERNAL CLAMPING DI-

ODE FOR DEMAGNETIZATION ENERGY UP
TO 150mJ

SEVERAL DEVICES CAN BE CONNECTED
IN PARALLEL

DESCRIPTION

The TDE1798 is an interface circuit delivering
high currents and capable of driving any type of
loads.
The output is protected from short-circuits with
the positive supply or ground. In addition thermal
shut down is provided to keep the IC from over­heating. If internal dissipation becomes too high,

PIN CONNECTION (Top view)

CC

TDE1798

Minidip

ORDERING NUMBER: TDE1798DP

the driver will shut down to prevent excessive
heating. The output stays nullafter theoverload is
off, if the reset input is low. If high, the output will
alternativelyswitchon and off until the overload is
removed.
Higher current can be obtained by paralleling the
outputs of several devices. In this case, the de­vices can be reactivated simultaneously after an
overload if their reset input are connected in par­allel.
The device operates over a wide range of supply
voltages from standard ±15 operational amplifier
suppliesto the single ±6V or +35V used for indus­trial electronic systems. Input voltage can be
higher than the V
groundconditions.

. The output is low in open

CC

November 1991

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TDE1798

ABSOLUTE MAXIMUMRATINGS

Symbol Parameter Test Conditions Unit

V

V

V

V

I(reset)

I

P

W
T

T

I

A(sink)

I

A(source)

Supply Voltage 50 V

CC

Input Differential Voltage 50 V

ID

Input Voltage -30 to +50 V

I

Reset Input Voltage VCC -50 to V
Output Current internally limited A

O

Power Dissipation Internally Limited mW

tot

Reset Input Sink Current (in thermal shut-down) 15 mA
Repetitive Maximum Demagnetization Energy - 106Operations 150 mJ

D

Operating Ambient Temperature Range -25 to -85 °C

op

Storage TemperatureRange -65 to +150 °C

stg

Alarm Output Sink Current 25 mA
Alarm Output Source Current 12 mA

CC

V

BLOCK DIAGRAM

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TDE1798

THERMAL DATA

Symbol Description Value Unit

R

th j-case

R

th j-ambient

1) Devices bounded on a 40cm2glass-epoxy printed circuit0.15cm thick with 4cm2of copper

Thermal ResistanceJunction-case (1)
Thermal ResistanceJunction-ambient (1)

ELECTRICAL CHARACTERISTICS (note 2)
TDE-25°C ≤ T

Symbol Parameter Test Condition Min. Typ. Max. Unit

V

IO

I

CC

I

IB

V

ICR

V

I

I

SC

V

CC-VO

I

OL

I

(pin 1)source

I

(pin 6)sink

I

RH

I

RL

V

th

I

reset

I

OL(open GND)

V

BRVEO

Notes:

2) Foroperating athigh temperature,the TDE1798 mustbe derated basedon a150°C maximum junction temperature and the junction-ambient

thermal resistance.

3) The offsetvoltagegivenisthe maximum value of inputdifferential voltage required to drive the outputvoltage within 2V of theground or the
supply voltage;

4) Input voltage range is independentof the supply voltage;

5) The reference inputcanbe theinvertingor the non-inverting one.

≤ +85°C, 6V ≤ VCC≤ +35V, Io≤ 500mA(unlessotherwisespecified).

j

Input Offset Voltage (note 3) – 2 50 mV
Power SupplyCurrent Output High (Tamb = +25°C,

I

= 500mA)

o

Output Low
Input Bias Current – 15 40 µA
Common-mode InputVoltage

(note 4) 1 – 45 V
Range

Input VoltageRange V

> +1V, (note 4 and 5) -25 – 45 V

ref

Short-circuit Output Current VCC= 30V,t = 10ms 0.7 0.9 1.3 A
Output Saturation Voltage IO= 500mA (|V+I-V-I|> 50mV) – 1 1.25 V
Output Low Leakage Current Tj= +85°C(VCC= 30V,VO= 0V) – 10 100 µA
Available Alarm Output Current Source (V

(pin1)=VCC

- 2.5V)
Sink(inthermalshut-down)
V

=2V

(pin6)

Reset Input Current –

Reset Threshold 0.8 1.4 2 V
Reset Output Sink Current (in thermal shut-down) for

V

≤ +0.8V

reset

Output LeakageCurrent (open ground) – 10 100 µA
Output TransistorAvalanche Volt. VCC-V

O

max.
max.

–
–

4
6

-1

6.5
2

8

15

15

0

30
90

40
+1

°C/W
°C/W

8
4

–
–

mA
mA

mA
mA

µA
µA

2––mA

65 – 110 V

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TDE1798

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TDE1798

TYPICALAPPLICATIONAUTOMATICRESET

(*) D1 and Z1needed if thedemagnetization energy is higher than 150mJ

TYPICALAPPLICATIONCONTROLLED RESET

SHORTCIRCUIT CONDITIONS WITH AUTOMATIC RESET

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TDE1798

SHORTCIRCUIT CONDITIONS WITH CONTROLLED RESET

DEMAGNETIZATION OF INDUCTIVE LOADS
WITHOUTEXTERNAL CLAMPINGDEVICES.

With no external clamping device, the energy of
demagnetization is dissipated in the TDE1798
output stage, and the clamping voltage is the col-

W = V

(BR)

L

R

[I

V

(BR)

−

o

R

lector-emitterbreakdownvoltage V

(BR)CEO

This method provides a very fastdemagnetization
ofinductive loads and can be usedup to 150 mJ.

The amount of energy W dissipated in the output
stageduringa demagnetizationis :

V

(BR)

V

CC

− V

CC

) ]

− V

CC

Log ( 1 +

.

Remark 1 : This energy is dissipated inside the
case, then must be included in the whole power
dissipation.
Remark 2 : The use of external clamping device
is recommended in case of parallel driving of

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loads. The dispersion of the collector-emitter
breakdownvoltageV(BR) would induce the circuit
with the lowest V(BR) to dissipate the whole de­magnetization energy (which is roughly propor­tionnalto I

2

).

O

A 1 AMP. DRIVER (reset may be either automatic or controlled)

TDE1798

ALARMOUTPUTSINK ALARMOUTPUT SOURCE

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TDE1798

PARALLELALARMOUTPUTS

INTERFACE BETWEENHIGH VOLTAGEANDLOWVOLTAGESYSTEM

8/14

TDE1798

RESETAND SYNCHRONIZATION
Recommended diagram when the outputs are in

sible when all the circuits are returned in operat­ing conditions.

parallel. After thermal disjunction a restartis pos­SYNCRONOUSAUTOMATIC RESET(parallelor independentoutputs)

SYNCHRONOUSCONTROLLED RESET (parallelor idependentoutputs)

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TDE1798

TWOQUADRANTS D.C. MOTORDRIVE

MAIN FEATURES

V

CC-VCC

≤ 50V
Maximumoutput current0.5A
Full protection against overloads and short-cir-

cuits
No need of deadtimeduring rotation reversing
TTL compatibleinputs
TDE1799 and TDE1798 input signals have the

same reference

No automaticrestart after disjunction

CW/CCW ON PFF 1798 1799

0 0 OFF OFF
0 1 ON OFF
1 1 OFF ON
1 0 OFF OFF

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ON/OFF CYCLES

TDE1798

ROTATION REVERSING

11/14

TDE1798

OVERLOADCONDITIONS

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MINIDIP PACKAGE MECHANICAL DATA

TDE1798

DIM.

MIN. TYP. MAX. MIN. TYP. MAX.

A 3.32 0.131

a1 0.51 0.020

B 1.15 1.65 0.045 0.065
b 0.356 0.55 0.014 0.022

b1 0.204 0.304 0.008 0.012

D 10.92 0.430
E 7.95 9.75 0.313 0.384

e 2.54 0.100
e3 7.62 0.300
e4 7.62 0.300

F 6.6 0.260

I 5.08 0.200
L 3.18 3.81 0.125 0.150
Z 1.52 0.060

mm inch

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TDE1798

Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics assumes no responsibility for the
consequences of use of such informationnor for any infringement ofpatents or other rights of third parties which may result from its use. No
license is granted by implication or otherwise under any patent or patent rights of SGS-THOMSON Microelectronics. Specifications men­tioned in this publication are subject to change without notice. This publication supersedesand replaces all information previously supplied.
SGS-THOMSON Microelectronics products are not authorized for use as critical components in life support devices or systems without ex­press writtenapproval of SGS-THOMSON Microelectronics.

 1994 SGS-THOMSON Microelectronics - All RightsReserved

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