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TEA2019 Datasheet(PDF) 3 Page - STMicroelectronics

No. de pieza TEA2019
Descripción Electrónicos  CURRENT MODE SWITCHING POWER SUPPLY CONTROL CIRCUIT
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Fabricante Electrónico  STMICROELECTRONICS [STMicroelectronics]
Página de inicio  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

TEA2019 Datasheet(HTML) 3 Page - STMicroelectronics

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ELECTRICAL OPERATING CHARACTERISTICS
Tamb =+25
oC, potentials referenced to ground (unless otherwise specified)
Symbol
Parameter
Min.
Typ.
Max.
Unit
V
+
CC
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 (V
+
CC rising)
6
6.6
V
VCC(stop) Minimum positive voltage below which device stops operating (V
+
CC falling)
4.2
4.9
5.6
V
∆ V+CC Hysteresis on V+CC Threshold
0.7
1.1
1.6
V
ICC(sb)
Standby Supply Current Before Starting [V
+
CC <VCC(start)]
1
1.6
mA
Vth (Ic)
Current Limitation Threshold Voltage (pin 12)
–1100 –1000
–880
mV
R(Ic)
Collector Current Sensing Input Resistance
1000
IS
Demagnetization Sensing Threshold
75
100
125
mV
Demagnetization Sensing Input Current (pin 5 grounded)
1
µA
τmax
Maximum Duty Cycle
70
80
%
AV
Error Amplifier Gain
50
I
+
I
Error Amplifier Input Current (non-inverting input) (pin 6)
2
µA
V(REF)
Internal Reference Voltage
2.3
2.4
2.5
V
∆V(REF)
∆T
Reference Voltage Temperature Drift
10
–4
V/
°C
TOSC
Oscillator Free-running Period ( R = 59k
Ω, C = 1.5nF)
60
65
70
µs
∆f
OSC
∆T
Oscillator Frequency Drift with Temperature (V
+
CC = + 8V)
0.05
%/
°C
∆fOSC
∆VCC
Oscillator Frequency Drift with V
+
CC (+ 8V < V
+
CC < + 14V)
0.5
%/V
ton(min)
Minimum Conducting Time (Ct = 1nF)
2
µs
SYNCHRONIZATION INPUT (pin 7)
Symbol
Parameter
Min.
Typ.
Max.
Unit
V7pp
Peak to Peak Sawtooth Voltage
0.5
2.5
V
R(7)
Input Impedance
20
k
PLL CHARACTERISTICS (see Test Circuit)
Symbol
Parameter
Min.
Typ.
Max.
Unit
Frequency Sensitivity
100
Hz/
µA
∆T
Capture Range (TOSC =64
µs Typ.)
TOSC -TSYN min
TSYN max -TOSC
5.5
4.5
8
8
µs
µs
SATURATION SENSING (pin 4)
Symbol
Parameter
Min.
Typ.
Max.
Unit
V(4)
Input Threshold
3.2
V
I(4)
Input Current (V4 > 3.2V)
50
µA
Input Internal Resistance
1
k
RECOMMENDED OPERATING CONDITIONS
Symbol
Parameter
Min.
Typ.
Max.
Unit
V
+
CC
Positive Supply Voltage
8
V
VCC
Negative Supply Voltage
3
V
IO
Output Current
0.5
A
Foper
Operating Frequency
30
kHz
THERMAL DATA
Symbol
Parameter
Value
Unit
Rth (j-a)
Junction-ambient Thermal Resistance
80
°C/W
TEA2019
3/7


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