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TEA2018A Datasheet(PDF) 2 Page - STMicroelectronics

Part No. TEA2018A
Description  CURRENT MODE SWITCHING POWER SUPPLY CONTROL CIRCUIT
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Maker  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
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TEA2018A Datasheet(HTML) 2 Page - STMicroelectronics

   
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MONITORING
VCC
FLIP-FLOP
&
&
Ic
RECOPY
DELAY
500ns
1
THERMAL
SHUTDOWN
-1V
VOLTAGE
LIMITATION
OSCILLATOR
1
8
2.4V
7
3
COMPARATOR
INTERNAL
BIAS
VCC
”Good”
V REF
2.4V
6
1
5
4
2
DEMAGNETIZATION
SENSING
Undervoltage
0.1V
OUTPUT
GROUND
I
SENSE
V
CC
RC t
t
I
S
V
CC
G
≅ 50
MAXIMUM
DUTY CYCLE
70%
TEA2018A
BLOCK DIAGRAM
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Value
Unit
VCC+
Positive Supply Voltage
15
V
VCC-
Negative Supply Voltage
-5
V
IO(peak)
Peak Output Current (duty cycle < 5%)
±1A
II
Input Current (Pin 3)
±5mA
Tj
Junction Temperature
+150
oC
Toper
Operating Ambient Temperature Range
-20, +70
oC
Tstg
Storage Temperature Range
-40, +150
oC
THERMAL DATA
Symbol
Parameter
Value
Unit
Rth (j-a)
Junction-ambient Thermal Resistance
80
oC/W
ELECTRICAL OPERATING CHARACTERISTICS
Tamb =25
oC, potentials referenced to ground (unless otherwise specified) (see test circuit)
Symbol
Parameter
Min.
Typ.
Max.
Unit
VCC+
Positive Supply Voltage
6.6
8
15
V
VCC-
Negative Supply Voltage
-1
-3
-5
V
VCC(start)
Minimum Positive Supply Voltage required for starting (VCC+ rising)
6
6.6
V
VCC(stop)
Minimum Positive Voltage below wich device stops operating (VCC+ falling)
4.2
4.9
5.6
V
TEA2018A
2/7


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