GL7101
1
GL7101
EARTH LEAKAGE CURRENT DETECTOR
Description
The GL7101 is designed for use in earth leakage
circuit interrupters for operation directly off the AC
Line in breakers.
It contains pre regulator, main regulator, after
regulator, differential amplifier, level comparator,
latch circuit. The input 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.
Feature
Low Power consumption (P
D
= 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 (T
A
= -30 to 85
)
High Noise Immunity
Pin Configuration
(Top view)
Absolute Maximum Rating (T
A
= 25
)
Supply voltage
20
V
Supply Current
8
mA
Power Dissipation
200
mW
Operating Temperature
-30 to 85
Storage Temperature
-55 to 125
Block diagram
GL7101
1
2
3
4
8
7
6
5
V
R
IN
GND
O
D
V
+
O
S
N
R
S
C
Voltage Regulator
IN
8
7
6
5
1
2
3
4
Bias
Latch
V
GND
O
V
+
O
S
N
R
S
C
Amp
GL7101
2
Recommended Operating Condition : Ta = -30
to 80
PARAMETER
SYMBOL
MIN.
TYP.
MAX.
UNIT
Supply Voltage
V
+
12
V
V
S
-GND Capacitor
C
VS
1
F
O
S
-GND Capacitor
C
OS
1
F
Electrical Characteristics
PARAMETER
SYMBOL
CONDITIONS
TEMP
(
)
MIN.
TYP.
MAX
UNIT
TEST
CIRCUIT
-30
-
-
580
25
-
400
530
Supply Current 1
I
S1
V
+
=12V, V
R
-V
I
=30mV
85
-
-
480
A
1
*
Trip Voltage
V
T
V
+
=16V, V
R
-V
I
=X
-30
85
9
13.5
18 mV(rms)
2
Differential Amplifier
Output Current 1
I
TD1
V
+
=16V, V
R
-V
I
=30mV
V
OD
=1.2V
25 -12
-
-30
A
3
Differential Amplifier
Output Current 2
I
TD2
V
+
=6V, V
R
-V
I
=short
V
OD
=0.8V
25
17
-
37
A
4
I
SI
=580
A
-30 -200
-
I
SI
=530
A
25 -100
-
Output Current
I
O
V
SC
=1.4V
V
OS
=0.8V
I
SI
=480
A
85 -75
-
A
5
S
C
On Voltage
V
SC
ON
V
+
=16V
25 0.7
-
1.4
V
6
S
C
Input Current
I
SC
ON
V
+
=12V
25
-
-
5
A
7
Output "L" Current
I
OSL
V
+
=12V, V
OSL
0.2V
-30
85
200
-
-
A
8
Input Clamp Voltage
V
IC
V
+
=12V, V
IC
=20mA
-30
85
4.3
-
6.7
V
9
Differential Input
Clamp Voltage
V
IDC
I
IDC
=100mV
-30
85
0.4
-
2
V
10
Max. Current voltage
V
SM
I
SM
=7mA
25
20
-
28
V
11
Supply Current 2
I
S2
V
OS
=0.5V, V
R
-V
I
=X
-30
85
-
-
900
A
12
Latch Circuit Off
Supply Voltage
V
+
OFF
25 0.5
-
V
13
Response Time
T
ON
V
+
=16V, V
R
-V
I
=0.3V
25
1
-
4
ms
14
*
A: 9 ~ 12.55 B: 11.5 ~ 15.5 C: 14.5 ~ 18
GL7101
3
Typical Performance Curves
VOLTAE-SUPPLY VOLTAGE
V
oltage V
CC
(V)
SUPPLY VOLTAGE V
+
(V)
Frequency
8 10 12 14 16 18 20
12
10
8
6
4
2
0
25
75
T
A
=-25
SUPPLY CURRENT-SUPPLY
VOLTAGE
SUPPLY CURRENT I
S1
SUPPLY VOLTAGE V
+
(V)
Frequency
0 5 10 15 20 25 30
700
600
500
400
300
200
100
T
A
=-25
25
75
REFERENCE VOLTAGE-SUPPLY
VOLTAGE
REFERENCE VOLTAGE V
R
(V)
SUPPLY VOLTAGE V
S
(V)
0 4 8 12 16 20
2.5
2
1.5
1
1.0
0.5
T
A
=-25
25
75
BIAS CURRENT-TEMPERATURE
BIAS CURRENT I
IN
nA
TEMPERATURE T
A
(
)
-40 -20 0 20 40 60 80 100
1000
500
DIFFERENTIAL AMPLIFIER OUTPUT
CURRENT-TEMP
DIFFERENTIAL AMP
CURRENT I
TD1
TEMPERATURE T
A
(
)
-40 -20 0 20 40 60 80 100
-50
-40
-30
-20
-10
0
DIFFERENTIAL AMPLIFIER OUTPUT
VOLTAGE - DIFFERENTIAL INPUT
VOLTAGE
DIFFERENTIAL AMP OUTPUT V
DD
(V)
DIFFERENTIAL INPUT VOLTAGE
V
I
=V
R
-
VIN (mV)
10 12 14 16 18 20
5
4
3
2
1
0
T
A
=75
25
-25
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