LX1570 Ver la hoja de datos (PDF) - Microsemi Corporation
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LX1570 Datasheet PDF : 12 Pages
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PRODUCT DATABOOK 1996/1997
PHASE MODULATED AC SYNCHRONOUS SECONDARY-SIDE CONTROLLER
PR E L I M I N A RY D ATA S H E E T
LX1570/1571
ELECTRICAL CHARACTERISTICS
(Unless otherwise specified, these specifications apply over the ranges TA = -55 to 125ºC for the LX1570M/1571M, TA = -40 to 85ºC for the
LX1570I/1571I, and TA = 0 to 70ºC for LX1570C/1571C. VCC = 15V. Typ. number represents TA = 25ºC value.)
Parameter
Symbol
Test Conditions
LX1570/1571
Units
Min. Typ. Max.
Reference Section
Initial Accuracy
Line Regulation
Temp Stability
Timing Section
VRI TA = 25ºC, measured at F.B pin
∆VRL 11V < VCC < 25
∆VRT Note 2
2.475 2.500 2.525 V
±1
%
±1.5 %
Initial Accuracy
Line Voltage Stability
Charging Current
Discharging Current
Leakage Current
Ramp PK to PK
Error Amp / Soft Start Comp Section
fO CT = , TJ = 25°C, measured at pin 6
Over Temp, measured at pin 6
∆fOL
ICHG
IDISCH
ILK
VRPP
C.S.INPUT = 1.5V
C.S.INPUT = 0V
C.S.INPUT = 1.5V (1571), C.S.INPUT = -0.4V (1570)
90 100 110 kHz
85 100 115 kHz
±1
%
3
mA
3.5
mA
4
µA
0.6
V
6
V
Transconductance
Input Bias Current
Open Loop Gain
Output Sink Current
Output Source Current
Output HI Voltage
Output LO Voltage
Slew Rate
gm
IB
AVOL
IEA(SINK)
IEA(SOURCE)
VCOMP-HI
VCOMP-LO
S
VFB = 2.6V
VFB = 2.4V
0.005
µΩ
0.1
1
µA
60
70
dB
200 400
µA
200 400
µA
5.1
V
0.8
V
1
V/µSec
Soft-Start Section
Soft Start Timing Factor
KSS
Soft Start Discharge Current
ISS-DIS
Current Sense Section
35
50
65 ms/µF
TBD
mA
Input Range
LX1570
VCSI
LX1571
-0.8
V
-0.3
6
V
Input Current
LX1570
ICSB
LX1571
25
µA
1
µA
C.S. Amplifier Gain
LX1570
ACS
LX1571
-13.5 -15 -16.5 V/V
2.7
3
3.3 V/V
Minimum Current Threshold Voltage
C.S. Delay to Driver Output
C.L. Pulse-By-Pulse Threshold Voltage
C.L. Hiccup Threshold Voltage
Voltage Hiccup Threshold
LX1570
LX1571
LX1570
LX1571
LX1570
LX1571
VCSMIN
10% Overdrive
VCLP
VCLH
VHCCP
-50
mV
250
mV
100 200
ns
-0.18 -0.2 -0.22 V
0.9
1
1.1
V
-0.3
V
1.5
V
2
V
Note 2. Although this parameter is guaranteed, it is not 100% tested in production.
Copyright © 1997
Rev. 0.9.3 1/97
3
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