View KA2803B_177949.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

www.fairchildsemi.com
KA2803B
Earth Leakage Detector
Features
* * * * * * * * * Low Power Consumption PD =5mW, 100V/200V Built-in Voltage Regulator High Gain Differential Amplifier 0.4mA Output Current Pulse to Trigger SCR' S Low External Part Count DIP Package (8-DIP), High Packing Density High Noise Immunity, Large Surge Margin Super Temperature Characteristic of Input Sensitivity Wide Operating Temperature Range (TA = -25C ~ +80C) * Operation from 12 to 20V Input
Description
The KA2803B is designed for use in earth leakage circuit interrupters, for stable operation of the AC line in breakers. The input of the differential amplifier is connected to the secondary coil of ZCT(Zero Current Transformer). The amplified output of differential amplifier is integrated at external capacitor to gain adequate time delay that is specified in KSC4613. The level comparator generates high level when earth leakage current is greater than the fixed level.
8-DIP
Functions
* Differential Amplifier * Level Comparator * Latch Circuit
1
8-SOP
1
Block Diagram
8
VCC
7
OS(Output)
6
NR
5
SC
Bias Voltage
Internal Internal Bias
Zener Zener Protect
Reference Voltage Generator Reference
+
Latch Latch Circuit
+
-
Circuit
Voltage
1
VR
2
VI
3
GND
4
OD
Rev. 1.0.4
(c)2002 Fairchild Semiconductor Corporation
KA2803B
Absolute Maximum Ratings (TA = 25C)
Parameter Supply Voltage Supply Current Power Dissipation Lead Temperature (Soldering 10sec) Operating Temperature Storage Temperature Symbol VCC ICC PD TLEAD TOPR TSTG Value 20 8 300 260 - 25 ~ +80 - 65 ~ +150 Unit V mA mW C C C
Electrical Characteristics
(TA = -25C to 80C) Parameter Supply Current 1 Symbol ICC Conditions VCC = 12V VR = Open VI = 2V (-25C) (25C) (80C) 2 1 Circuit Min. 300 14 12.5 3 4 -12 17 200 5 6 7 8 9 10 11 12 200 100 0.7 -13 200 0.4 20 200 7.0 Typ. Max. 400 16 14.2 20 27 400 400 300 1.0 -7 800 1.2 24 400 8.0 580 530 480 18 17 -30 37 800 800 600 1.4 -1 1400 2 28 900 9.0 V A A V V A V A mV mVrms A (rms) A A Unit
Trip Voltage Differential Amplifier Output Current 1 Differential Amplifier Output Current 2 Output Current Latch on Voltage Latch Input Current Output Low Current Diff. Input Clamp Voltage Maximum Current Voltage Supply Current 2 Latch Off Supply Voltage
VT
VCC = 16V VR = 2V ~ 2.02V VI = 2V (Note1) VCC = 16V (VR-VI =30mV , VOD =1.2V) VCC =16V, VOD =0.8V VR, VI =VP (Note2) VSC = 1.4V (-25C) VOS = 0.8V (25C) VCC = 16V (25C) VCC = 16V VCC = 16V VCC = 12V, VOSL = 0.2V VCC = 16V, IIDC = 100mA ISM = 7mA VCC = 12V, VOSL = 0.6V VOS = 12V VSC = 1.8V IIDC =100mA VCC = 16V VR-VI = 0.3V , 1V < VX < 5V
IO(D) IO(D)
IO VSCON ISCON IOSL VIDC VSM IS2 VSOFF
Response Time(Note1)
TON
13
2
3
4
mS
Note: 1. This Parameter, although guaranteed, is not tested in Production. 2. VP=Vpin1 -0.03V at Vpin2=2.0V , Vpin4=1.5V
2
KA2803B
Test Circuit
1 Supply Current1 1
Open Open 2V 2V 1 2 2 3 3 4
4 1
2 Trip Voltage 2
12V 12V Open Open 473 473
VPin1 VoltageP Measurement PIN1 for V
Pin1 Voltage Vpin1
8 8 7 7 6 6 5
5
Vr=2V
Vr=2V~2.02V
2 02V 1 1 2 2V 2 2V 3 3 4
4 DVM
8 8 7 6 6 5
5 7
16V 16V Open Open Open Open 473 473
Vpin1
DVM
1
1
2V
2V
2 2 3 3 4
4 1.5V
8 8 7 6 6 5
5 7
16V Open Open
Open Open 473
16V
1 5V
* Vp = Vpin1 0 03V
* Vp=Vpin1-0.03V
3 Differential Amplifier Output 3
Current1
Vp
Vp
4 Differential Amplifier Output 4
Current2
1
Vp
5 Output Current 5
Open Open Open Open
1
Open Open
1
2 2 3 3 4
4
1
8 8 7 7 6 6 5
5
16V 16V Open Open Open Open
Vp
A
A Io(D) = ?
IO(D)=?
A Io(D) = ?
0.8V 0 8V
A
4 5 IO(D)=?
2 2 3 3 4
1
8 8 7 7 6 6 5
16V 16V Open Open Open Open
1
2 2 3 3 4
4
8 8 7 6 6 5
5 7
16V 16V 0.8V A A Iout 0 8V Iout 473 473
1.5V 1 5V
Open Open
1 4V
1.4V
6 Latch on Voltage 6
Open Open Open Open 1
1
7 Latch Input Current
7
16V 16V > 6V >6V
DVM
8 Output Low Current 8
16V
2 2 3 3 4
4
8 8 7 7 6 6 5
5
?
Open Open Open Open
1
0.6V 1.5V ? Open Open 0 6V 1 5V
9
V 473 V
473
2 2 3 3 4
4
1
8 8 7 7 6 6 5
5
16V > 6V >6V
DVM
Open Open Open Open
1 2 2 3 3 4
4 1
8 8 7 6 6 5
5 7
A A
473 473
12V 12V
473
A
473
? ?
0.2V 0 2V
Open Open
0 6V 0.6V
?A
1 5V 1.5V
?
Open Open
9
Diff. Input Clamp Voltage
10 Maximum Current Voltage 10
I=7mA
16V Open
11 Supply Current2 11
Icc=?
VSM=? V ?
100mA
100mA VIDC DVM
VIDC
1 2 3 3 4
2 4 1
8 8 7
7 5
6 6 5
16V Open Open
473 Open
Open Open Open
1 2 2 3 3 4
4 Open 1
8 8 7
7 5
I7 A
A A
Open 473
6 6 5
Open
>10V 10V
Open Open Open Open
1 2 4
1
I
473
2 3 3 4
8 8 7 6 6 5
5 7
A A
?
0.6V 0 6V 473 473
12V 12V
Open
473 Open
Open Open
12 Latch Off Supply Voltage 12
100mA
13 Response Time 13
0.3Vp-p 0 3V 12V
100mA Open
Open
1
2 2 3 3 4
4
1
8 8 7 7 6 6 5
5 0.8V 1 8V
12V
DVM 1V1
100
100
473
473
2 2 3 3 4
4
1
8 8 7 7 6 6 5
5 473
16V DVM
16V
473
473
Open
Open
473
3
KA2803B
Typical Characteristics
Figure 1. Supply Current
Figure 2. Differential Amp. Output Current VR-VI=30mV, VOD=1.2V
Figure 3. Differential Amp. Output Current VR, VI=VP, VOD=0.8V
Figure 4. Output Current
Figure 5. Output Low Current
Figure 6. Vcc Voltage Vs. Supply Current 1
4
KA2803B
Typical Characteristics (Continued)
Figure 7. Differential Amp. Output Current 1
Figure 8. Differential Amp. Output
Figure 9. Latch Input Current
Figure 10. Output Low Current
Figure 11. Output Current
Figure 12. Vcc Voltage Vs. Supply Current 2
5
KA2803B
Typical Characteristics (Continued)
Figure 13. Differential Input Clamp Voltage
Figure 14. Latch Off Supply Voltage
Figure 15. Latch On Input Voltage
Figure 16. Maximum Supply
Figure 17. Trip & Output
6
KA2803B
Typical Characteristics (Continued)
INPUT
VR: Variable VI : Constant
OD OUTPUT
OS OUTPUT
Figure 18. Output Response Time
7
KA2803B
Application Circuit
Figure 1. Full Wave Application Circuit
Figure 2. Half Wave Application Circuit
Application Note
(refer to full wave application circuit Fig. 1) The Fig 1 shows the KA2803B connected in a typical leakage current detector system. The power is applied to the VCC terminal (Pin 8) of the KA2803B directly from the power line. The resistor RS and capacitor CS are chosen so that pin 8 voltage is at least 12V. The value of CS is recommended above 1F at this time. If the leakage current is at the load, it is detected by the zero current transformer (ZCT). The output voltage signal of ZCT is amplified by the differential amplifier of the KA2803B internal circuit and appears as half cycle sine wave signal referred to input signal at the output of the amplifier. The amplifier closed loop gain is fixed about 1000 times with internal feedback resistor to compensate for zero current transformer (ZCT) Variations. The resistor RL should be selected so that the breaker satisfies the required sensing current. The protection resistor RP is not usually used put when the high current is injected at the breaker, this resistor should be used to protect the earth leakage detector IC the KA2803B. The range of RP is from several hundred to several k. The capacitor C1, is for the noise canceller and standard value of C1 is 0.047F. Also the capacitor C2 is noise canceller capacitance but it is not usually used. When high noise is only appeared at this system 0.047F capacitor may be connected between pin 6 and pin 7. The amplified signal is finally appeared to the Pin 7 with pulse signal through the internal latch circuit of the KA2803B. This signal drives the gate of the external SCR which energizes the trip coil which opens the circuit breaker. The trip time of breaker is decided by the capacitor C3 and the mechanism breaker. This capacitor should be selected under 1F for the required the trip time. The full wave bridge supplies power to the KA2803B during both the positive and negative half cycles of the line voltage. This allows the hot and neutral lines to be interchanged. If your application want the detail information, request it on our application circuit designer of KA2803B.
8
KA2803B
Mechanical Dimensions
Package Dimensions in millimeters
8-DIP
0.018 0.004 1.524 0.10 0.060 0.004 0.46 0.10 6.40 0.20 0.252 0.008 ( #1 #8 9.20 0.20 0.362 0.008 9.60 MAX 0.378 #4 #5 2.54 0.100 5.08 MAX 0.200 7.62 0.300 3.40 0.20 0.134 0.008 3.30 0.30 0.130 0.012 0.33 MIN 0.013
0.25 -0.05
0~15
+0.10
0.010 -0.002
+0.004
0.79 ) 0.031
9
KA2803B
Mechanical Dimensions (Continued)
Package Dimensions in millimeters
8-SOP
MIN 1.55 0.20 0.061 0.008 0.1~0.25 0.004~0.001
#1
#8 4.92 0.20 0.194 0.008 5.13 MAX 0.202
( #4 #5 6.00 0.30 0.236 0.012
+0.10 0.15 -0.05 +0.004 0.006 -0.002
0.56 ) 0.022 1.80 MAX 0.071 MAX0.10 MAX0.004 3.95 0.20 0.156 0.008 5.72 0.225 0.50 0.20 0.020 0.008
10
0~
8
1.27 0.050
0.41 0.10 0.016 0.004
KA2803B
Ordering Information
Product Number KA2803B KA2803BD Package 8-DIP 8-SOP Operating Temperature -20 ~ +80C
11
KA2803B
DISCLAIMER FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS. LIFE SUPPORT POLICY FAIRCHILD'S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury of the user.
www.fairchildsemi.com 9/5/02 0.0m 001 Stock#DSxxxxxxxx 2002 Fairchild Semiconductor Corporation
2. A critical component in any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness.

▲Up To Search▲

Price & Availability of KA2803B

	To Download KA2803B Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .