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TEA5170 Datasheet(PDF) 3 Page - STMicroelectronics

Part # TEA5170
Description  SWITCH MODE POWER SUPPLY SECONDARY CIRCUIT
PDF  9 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

TEA5170 Datasheet(HTML) 3 Page - STMicroelectronics

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ELECTRICAL CHARACTERISTICS (TA = 25
oC, VCC = 12V, unless otherwise specified)
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
OSCILLATOR
TA
Free Period
RT = 100k
Ω ± 0%
CT = 1.2nF
± 0%, Vcc = 12V
60.40 65.60 70.80
µS
TB
RT = 100k
Ω ± 0%
CT = 560pF
± 0%, Vcc = 12V
29.18 31.70 34.22
µS
∆FOSC
(T)
Frequency drift due to ambient
temperature variation from 0
oC to 70oC
FOSC
(70oC) − FOSC (0oC)
70
oC x F
OSC
(25oC)
RT = 100k
Ω ± 0%
CT = 1.2nF
± 0%, Vcc = 12V
0.01
%/
°C
∆FOSC
(VCC)
Frequency drift due to VCC variation
from 5V to 12V
FOSC
(12V) − FOSC
(5V)
7V x FOSC
(12V)
RT = 100k
Ω ± 0%
CT = 1.2nF
± 0%
0.07
%/V
ERROR VOLTAGE AMPLIFIER (VCC = 12V)
Ibias
Input Bias Current
Ein = 2V
0
0.2
1
µA
Gvol
Voltage Gain
80
dB
GB
Gain Bandwidth
2
MHz
Slew Rate
2V/
µs
INTERNAL VOLTAGE REFERENCE
VREF
Voltage Reference
Using the voltage error
amplifier as a follower
1.9
2
2.1
V
∆VREF (VCC) Line Regulation
VREF
(12V) − VREF
(5V)
7V
VCC = 5V to 12V
– 3
0.4
3
mV/V
∆VREF (T)
VREF drift with temperature
VREF
(70oC) − VREF (0oC)
70
oC
TA = 0
°C to 70°C
0.2
mV/
°
TON MIN
TONMIN A
Minimum Duty Cycle
Ct = 1.2nF
± 0%
Rt = 100k
Ω ± 0%
1.77
2.53
3.29
µs
TONMIN B
Minimum Duty Cycle
Ct = 560pf
± 0%
Rt = 100k
Ω ± 0%
1.04
1.49
1.94
µs
POWER OUTPUT STAGE
VPOUTH
Output High Level
Iload = 1mA
6.3
6.9
7.5
V
VPOUTL
Output Low Level
Iload = – 1mA
0.5
0.8
1.1
V
ISINK
Sink Current
VPOUT = 3V
30
60
190
mA
ISOURCE
Source Current
VPOUT = 3V
30
110
190
mA
SYNCHRONISATION
Ftrig Max
Maximum Synchro Frequency
64
kHz
Vtrig
Synchro Triggering Threshold
2.7
3
V
Ttrigp
Synchro Triggering Pulse Width
at VRT = 2.7Volt (fig 5)
800
nS
Wtrig +
Positive Triggering Window
Ttrig+ − TO
TO
CT = 1.2nF
± 0%
RT = 100k
Ω ± 0%
25
35
40
%
Wtrig –
Negative Triggering Window
TO
− Ttrig−
TO
CT = 1.2nF
± 0%
RT = 100k
Ω ± 0%
929
42
%
SOFT START
Icsf
*Csf Load Current
Vcsf = 1V
2.5
3.7
6
µA
Donmax
Maximum Duty Cycle
Vcs > 2.5V, VCC = 12V
CT = 1.2nf
± 0%
RT = 100k
Ω ± 0%
60
78
95
%
*Csf is a high impedance capacitor
TEA5170
3/9



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