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TDE1798
0.5A INTELLIGENT POWER SWITCH
HIGH OUTPUT CURRENT 500mA SHORT-CIRCUIT PROTECTION UP TO VCC = +35V INTERNAL THERMAL PROTECTION WITH EXTERNAL RESET AND SYNCRONIZATION CAPABILITY OPEN GROUND PROTECTION OUTPUT VOLTAGE CAN BE LOWER THAN GROUND FOR FAST INDUCTIVE LOAD DEMAGNETIZATION DIFFERENTIAL INPUTS FOR ANY LOGIC SYSTEM COMPATIBILITY INPUT VOLTAGE CAN BE HIGHER THAN VCC LARGE SUPPLY VOLTAGE RANGE FROM 6V TO 35V SINK AND SOURCE ALARM OUTPUTS NO NEED FOR EXTERNAL CLAMPING DIODE 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)
Minidip ORDERING NUMBER: TDE1798DP
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 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 supplies to the single 6V or +35V used for industrial electronic systems. Input voltage can be higher than the VCC. The output is low in open ground conditions.
November 1991
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TDE1798
ABSOLUTE MAXIMUM RATINGS
Symbol VCC VID VI VI(reset) IO Ptot WD Top Tstg IA(sink) IA(source) Supply Voltage Input Differential Voltage Input Voltage Reset Input Voltage Output Current Power Dissipation Reset Input Sink Current (in thermal shut-down) Repetitive Maximum Demagnetization Energy - 106 Operations Operating Ambient Temperature Range Storage Temperature Range Alarm Output Sink Current Alarm Output Source Current Parameter Test Conditions 50 50 -30 to +50 VCC -50 to VCC internally limited Internally Limited 15 150 -25 to -85 -65 to +150 25 12 Unit V V V V A mW mA mJ C C mA mA
BLOCK DIAGRAM
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TDE1798
THERMAL DATA
Symbol Description max. max. Value 30 90 Unit C/W C/W R th j-case Thermal Resistance Junction-case (1) Rth j-ambient Thermal Resistance Junction-ambient (1)
1) Devices bounded on a 40cm2 glass-epoxy printed circuit 0.15cm thick with 4cm2 of copper
ELECTRICAL CHARACTERISTICS (note 2) TDE -25C Tj +85C, 6V VCC +35V, Io 500mA (unless otherwise specified).
Symbol VIO ICC Parameter Input Offset Voltage Power Supply Current (note 3) Output High (Tamb = +25C, Io = 500mA) Output Low (note 4) Vref > +1V, (note 4 and 5) VCC = 30V, t = 10ms IO = 500mA (|V I - V I|> 50mV) Tj = +85C (VCC = 30V, VO = 0V) Source (V(pin 1) = VCC - 2.5V) Sink (in thermal shut-down) V(pin 6) = 2V
+ -
Test Condition
Min. - - - - 1 -25 0.7 - - 4 6 - -1 0.8
Typ. 2 6.5 2 15 - - 0.9 1 10 8 15 15 0 1.4 - 10 -
Max. 50 8 4 40 45 45 1.3 1.25 100 - - 40 +1 2 - 100 110
Unit mV mA mA A V V A V A mA mA A A V mA A V
IIB VICR VI ISC VCC - VO IOL I(pin 1) source I(pin 6) sink IRH IRL Vth Ireset
Input Bias Current Common-mode Input Voltage Range Input Voltage Range Short-circuit Output Current Output Saturation Voltage Output Low Leakage Current Available Alarm Output Current
Reset Input Current Reset Threshold Reset Output Sink Current (in thermal shut-down) for Vreset +0.8V (open ground)
2 - 65
IOL(open GND) Output Leakage Current VBRVEO
Output Transistor Avalanche Volt. VCC - VO
Notes: 2) For operating at high temperature, the TDE1798 must be derated based on a 150C 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.
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TDE1798
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TDE1798
TYPICAL APPLICATION AUTOMATIC RESET TYPICAL APPLICATION CONTROLLED RESET
(*) D1 and Z1 needed if the demagnetization energy is higher than 150mJ
SHORT CIRCUIT CONDITIONS WITH AUTOMATIC RESET
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TDE1798
SHORT CIRCUIT CONDITIONS WITH CONTROLLED RESET
DEMAGNETIZATION OF INDUCTIVE LOADS WITHOUT EXTERNAL CLAMPING DEVICES. With no external clamping device, the energy of demagnetization is dissipated in the TDE1798 output stage, and the clamping voltage is the colW = V(BR)
lector -emitter breakdown voltage V(BR)CEO. This method provides a very fast demagnetization of inductive loads and can be used up to 150 mJ. The amount of energy W dissipated in the output stage during a demagnetizationis :
VCC V(BR) - VCC L Log ( 1 + )] [ Io - R V(BR) - VCC R
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 breakdown voltage V(BR) would induce the circuit with the lowest V(BR) to dissipate the whole demagnetization energy (which is roughly proportionnal to IO2).
TDE1798
A 1 AMP. DRIVER (reset may be either automatic or controlled)
ALARM OUTPUT SINK
ALARM OUTPUT SOURCE
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TDE1798
PARALLEL ALARM OUTPUTS
INTERFACE BETWEEN HIGH VOLTAGE AND LOW VOLTAGE SYSTEM
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TDE1798
RESET AND SYNCHRONIZATION Recommended diagram when the outputs are in parallel. After thermal disjunction a restart is possible when all the circuits are returned in operating conditions.
SYNCRONOUS AUTOMATIC RESET (parallel or independentoutputs)
SYNCHRONOUS CONTROLLED RESET (parallel or idependentoutputs)
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TDE1798
TWO QUADRANTS D.C. MOTOR DRIVE MAIN FEATURES VCC - VCC 50V Maximum output current 0.5A Full protection against overloads and short-circuits No need of deadtime during rotation reversing TTL compatible inputs TDE1799 and TDE1798 input signals have the same reference No automatic restart after disjunction
CW/CCW 0 0 1 1 ON PFF 0 1 1 0 1798 OFF ON OFF OFF 1799 OFF OFF ON OFF
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TDE1798
ON/OFF CYCLES
ROTATION REVERSING
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TDE1798
OVERLOAD CONDITIONS
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TDE1798
MINIDIP PACKAGE MECHANICAL DATA
DIM. MIN. A a1 B b b1 D E e e3 e4 F I L Z 3.18 7.95 2.54 7.62 7.62 6.6 5.08 3.81 1.52 0.125 0.51 1.15 0.356 0.204 1.65 0.55 0.304 10.92 9.75 0.313 0.100 0.300 0.300 0.260 0.200 0.150 0.060 mm TYP. 3.32 0.020 0.045 0.014 0.008 0.065 0.022 0.012 0.430 0.384 MAX. MIN. inch TYP. 0.131 MAX.
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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 information nor for any infringement of patents 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 supersedes and 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 written approval of SGS-THOMSON Microelectronics. (c) 1994 SGS-THOMSON Microelectronics - All Rights Reserved SGS-THOMSON Microelectronics GROUP OF COMPANIES Australia - Brazil - France - Germany - Hong Kong - Italy - Japan - Korea - Malaysia - Malta - Morocco - The Netherlands - Singapore Spain - Sweden - Switzerland - Taiwan - Thaliand - United Kingdom - U.S.A.
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