SL7101 SLS
Document overview
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Technical content
EARTH LEAKAGE CURRENT DETECTOR
Description
The SL7101 is designed for use in earth leakage circuit interrupters for operation directly of the AC Line in breakers. It contains pre regulator, main regulator, after regulator, differential amplifier, level comparator, latch circuit. The in put in the differential amplifier is connect to the secondary node of zero current transformer. The level comparator generates high level when earth leakage current is greater than some level.
- Low Power Consumption (PD=5mW) 100V/200V
- 100V/200V Common Built-in Voltage Regulator
- High Gain Differential Amplifier
- High Input Sensitivity
- Minimum External Parts
- Large Surge Margin
- Wide Operating Temperature Range (TÀ =-30 to 85°C)
- High Noise Immunity Block Diagram Feature Pin Configuration (Top View) 20V 8mA 200mW - 30 to 85°C - 55 to 125°C Absolute Maximum Ratings (T^=25°c) § Supply Voltage § Supply Current § Power Dissipation § Operating Temperature § Storage Temperature R OD IN OS NR SC
Recomended Operating Condition: TA=-30°C to 80°C PARAMETER SYMBOL MIN. TYP. MAX UNIT Supply Voltage V+ 12 V Vs-GND Capacitor Cvs 1 µF OS-GND Capacitor Cos 1 µF
Electrical Characteristics
PARAMETER SYMBOL CONDTIONS TEMP. (°C) MIN. TYP. MAX. UNIT -30 - - 580 25 300 400 530 Supply Current 1 lS1 V+=12V, VR - VI = 30 mV 85 - - 480 µA * Trip Voltage VT V+ = 16V, VR - VI = X -30 9 13.5 18 mV (rms) Differential Amplifier Output Current 1 ITD1 V+ = 16 V, VR - VI = 30 mV VOD = 1.2 V 25 -12 -20 -30 µA Differential Amplifier Output current 2 ITD2 V+ = 16 V, VR - VI = short VOD = 0.8 V 25 17 27 37 µA lSI = 580µA -30 -200 - lSI = 530µA 25 -100 - Output Current IO VSC = 1.4 V VOS = 0.8 V lSI = 480µA 85 -75 - µA SC ON Voltage VSC ON V+ = 16 V 25 0.7 1.0 1.4 V SC Input Current ISC ON V+ = l2V 25 - - 5 µA Output "L" Current IOSL V+ = 12 V, VOSL = 0.2 V -30 200 800 1400 µA Input Clamp Voltage VIC V+ = 12 V, IIC = 20 mA -30 4.3 - 6.7 V Differential Input Clamp Voltaqe VIDC IIDC = 100mA -30 0.4 1.2 2 V Max. Current Voltage VSM ISM = 7 mA 25 20 24 28 V Supply Current 2 IS2 VOS = 0.5 V, VR - VI = X -30 - - 1200 µA Latch Circuit Off Supply Votaqe V+ OFF 25 0.5 V Response Time TON V+ = 16 V, VR - VI = 0.3 V 25 1 3 4 ms
Typical Performance Curves
Description of elements of application diagram 1. The resistance of R1 resistor is chosen in such a way so that to limit IC’s consumption current (not more than 8 mA), and here the voltage drop is around 21-28V. 2. R2 resistor provides the necessary bias of the differential cascade. 3. R3 resistor is a loading one per input. 4. R4 resistor limits the charging current of C4 electrolytic capacitor are required to maintain IC performance until the fuse is completely burn out. Its value is chosen correspondingly. 5. C1 electrolytic capacitor is a filtering one as per supply (around 1 – 10 µF ). 6. Ñ2 and C3 capacitors are filtering ones (not more than 1 µF)