ST TDE1798 User Manual

®

0.5A INTELLIGENT POWER SWITCH

HIGH OUTPUT CURRENT 500mA
SHORT-CIRCUIT PROTE C TION U P TO

V

= +35V

CC

INTERNAL THERMAL PROTECTION WITH
EXTERNAL RESET AND SYNCRONIZATION
CAPABI LITY

OPEN GROUND PROTECTION
OUTPUT VOLTAGE CAN BE LOWER THAN

GROUND FOR FAST INDUCTIVE LOAD DE­MAGNETIZATI ON

DIFFERENTIAL INPUTS FOR ANY LOGIC
SYSTEM C O MP ATIBILITY

INPUT VOLTAGE CAN BE H IGHE R THAN V
LARGE SUPPLY VOLTAGE RANGE FROM

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

ODE FOR DEMAGNETIZATI ON 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 int ernal dissipation becomes too high,

CC

TDE1798

Minidip

ORDERING NUMBER:

the driver will shut down to prevent excessive
heating. The output stays null after the overload is
off, if the reset input is low. If high, the output will
alternatively switch on and off until the over load 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
supplies to the single ±6V or +35V used for indus­trial electronic systems. Input voltage can be
higher than the V

. The output is low in open

CC

ground conditions.

TDE1798DP

PIN CONNECTION (Top view)

September 2003

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TDE1798

ABSOLUTE MAXIMUM RATINGS

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 - 106 Operations 150 mJ

D

Operating Ambient Temperature Range -25 to -85

op

Storage Temperature Range -65 to +150

stg

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

CC

V

C

°

C

°

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 40cm

Thermal Resistance Junction-case (1)
Thermal Resistance Junction-ambient (1)

2

glass-epoxy printed circuit 0.15cm thick with 4cm2 of copper

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

- VOOutput Saturation Voltage IO = 500mA (|V+ I - V- I|> 50mV) – 1 1.25 V

V

CC

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)

For operating at high temperature, the TDE1798 must be derated based on a 150°C maximum junction temperature and the junction-ambient

thermal resistance.

3)

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

supply voltage;

4)

Input voltage range is independent of the supply voltage;

5)

The reference input can be the inverting or the non-inverting one.

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

j

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

I

= 500mA)

o

Output Low
Input Bias Current – 15 40
Common-mod e I npu t V olt age

(note 4) 1 – 45 V
Range

Input Voltage Range 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 Low Leakage Current Tj = +85°C (VCC = 30V, VO = 0V) – 10 100
Available Alarm Output Current Source (V

= VCC - 2.5V)

(pin 1)

Sink (in thermal shut-down)

V

= 2V

(pin 6)

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 Leakage Current (open ground) – 10 100
Output Transistor Avalanche Volt. VCC - V

O

max.
max.

–
–

6.5
2

30
90

C/W

°

C/W

°

8
4

mA
mA

µ

µ

4
6

-1

15

15

8

0

40
+1

–
–

mA
mA

µ
µ

2––mA

µ

65 – 110 V

A

A

A
A

A

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TDE1798

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TDE1798

TYPICAL APPLICATION AUTOMATIC RESET

(*) D1 and Z1 needed if the demagnetization energy is higher than 150mJ

TYPICAL APPLICATION CONTROLLED RESET

SHORT CIRCUIT CONDITIONS WITH AUTOMATIC RESET

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