TDE1798DP

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, 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. PIN CONNECTION (Top view) September 2003 1/14 TDE1798 ABSOLUTE MAXIMUM RATINGS Symbol VCC VID VI VI(reset) Parameter Supply Voltage Input Differential Voltage Input Voltage Reset Input Voltage IO Ptot Output Current Power Dissipation WD Reset Input Sink Current (in thermal shut-down) Repetitive Maximum Demagnetization Energy - 106 Operations Top Tstg IA(sink) IA(source) Operating Ambient Temperature Range Unit 50 50 V V -30 to +50 V VCC -50 to VCC V internally limited Internally Limited A mW 15 150 mA mJ -25 to -85 °C -65 to +150 °C Alarm Output Sink Current 25 mA Alarm Output Source Current 12 mA Storage Temperature Range BLOCK DIAGRAM 2/14 Test Conditions TDE1798 THERMAL DATA Symbol Description Rth j-case Thermal Resistance Junction-case (1) Rth j-ambient Thermal Resistance Junction-ambient (1) max. max. Value Unit 30 90 °C/W °C/W 1) Devices bounded on a 40cm2 glass-epoxy printed circuit 0.15cm thick with 4cm2 of copper ELECTRICAL CHARACTERISTICS (note 2) TDE -25°C ≤ Tj ≤ +85°C, 6V ≤ VCC ≤ +35V, Io ≤ 500mA (unless otherwise specified). Symbol Min. Typ. Max. Unit VIO Input Offset Voltage (note 3) – 2 50 mV ICC Power Supply Current Output High (Tamb = +25°C, Io = 500mA) Output Low – – 6.5 2 8 4 mA mA – 15 40 µA Common-mode Input Voltage Range (note 4) 1 – 45 V VI Input Voltage Range Vref > +1V, (note 4 and 5) -25 – 45 V ISC Short-circuit Output Current VCC = 30V, t = 10ms 0.7 0.9 1.3 A IIB VICR VCC - VO IOL I(pin 1) source I(pin 6) sink Parameter Test Condition Input Bias Current + - Output Saturation Voltage IO = 500mA (|V I - V I|> 50mV) – 1 1.25 V Output Low Leakage Current Available Alarm Output Current Tj = +85°C (VCC = 30V, VO = 0V) Source (V(pin 1) = VCC - 2.5V) Sink (in thermal shut-down) V(pin 6) = 2V – 10 100 4 6 8 15 – – µA mA mA – -1 15 0 40 +1 µA µA 0.8 1.4 2 V 2 – – mA – 10 100 65 – 110 µA V IRH IRL Reset Input Current Vth Ireset Reset Threshold Reset Output Sink Current (in thermal shut-down) for Vreset ≤ +0.8V (open ground) 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 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. 3/14 TDE1798 4/14 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 5/14 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 col- W = V(BR) V(BR) − VCC VCC L [ Io − Log ( 1 + )] R R V(BR) − VCC 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 6/14 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 demagnetization is : 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 7/14 TDE1798 PARALLEL ALARM OUTPUTS INTERFACE BETWEEN HIGH VOLTAGE AND LOW VOLTAGE SYSTEM 8/14 TDE1798 RESET AND SYNCHRONIZATION Recommended diagram when the outputs are in parallel. After thermal disjunction a restart is pos- sible when all the circuits are returned in operating conditions. SYNCRONOUS AUTOMATIC RESET (parallel or independent outputs) SYNCHRONOUS CONTROLLED RESET (parallel or idependent outputs) 9/14 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 10/14 No automatic restart after disjunction CW/CCW ON PFF 1798 0 0 OFF 1799 OFF 0 1 ON OFF 1 1 OFF ON 1 0 OFF OFF TDE1798 ON/OFF CYCLES ROTATION REVERSING 11/14 TDE1798 OVERLOAD CONDITIONS 12/14 TDE1798 mm inch DIM. MIN. A TYP. MAX. MIN. 3.32 TYP. MAX. 0.131 a1 0.51 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 0.020 D E 10.92 7.95 9.75 0.430 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 Z 3.18 OUTLINE AND MECHANICAL DATA 3.81 1.52 0.125 0.150 Minidip 0.060 13/14 TDE1798 Information furnished is believed to be accurate and reliable. However, STMicroelectronics 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 STMicroelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics. The ST logo is a registered trademark of STMicroelectronics. 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