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UC2856Q Fiches technique(PDF) 3 Page - Texas Instruments

No de pièce UC2856Q
Description  IMPROVED CURRENT MODE PWM CONTROLLER
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Fabricant  TI [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI - Texas Instruments

UC2856Q Fiches technique(HTML) 3 Page - Texas Instruments

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UC2856Q
www.ti.com
SGLS265A
– NOVEMBER 2004 – REVISED MAY 2011
ABSOLUTE MAXIMUM RATINGS
over operating free-air temperature range (unless otherwise noted)
(1) (2)
UNIT
Supply voltage
40 V
Collector supply voltage
40 V
DC
0.5 A
IO
Output current (sink or source)
Pulse (0.5 ms)
2 A
Error amplifier input voltage
–0.3 V to VIN
Shutdown input voltage
–0.3 V to 10 V
Current sense input voltage
–0.3 V to 3 V
SYNC output current
±10 mA
Error amplifier output current
-5 mA
Soft start sink current
50 mA
Oscillator charging current
5 mA
TA = 25°C
1 W
Power dissipation
TC = 25°C
2 W
TJ
Operating junction temperature range
–55°C to 150°C
Tstg
Storage temperature range
–65°C to 150°C
(1)
Stresses beyond those listed under
"absolute maximum ratings" may cause permanent damage to the device. These are stress ratings
only, and functional operation of the device at these or any other conditions beyond those indicated under
"recommended operating
conditions
" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
(2)
Unless otherwise indicated, voltages are reference to ground and currents are positive into and negative out of the specified terminals.
ELECTRICAL CHARACTERISTICS
TA = –40°C to 125°C, VIN = 15 V, RT = 10 kΩ, CT = 1 nF, and TA = TJ (unless otherwise stated)
(1)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
REFERENCE SECTION
Output voltage
IO = 1 mA,
TJ = 25°C
5.05
5.1
5.15
V
Line regulation voltage
VIN = 8 V to 40 V
20
mV
Load regulation voltage
IO = –1 mA to –10 mA
15
mV
Total output variation
Line, Load, and Temperature
5
5.2
V
Output noise voltage
f = 10 Hz to 10 kHz,
TJ = 25°C
50
µV
Long term stability
1000 hours, (2)
TJ = 25°C
5
25
mV
Short circuit current
VREF = 0 V
–25
–45
–65
mA
OSCILLATOR SECTION
TJ = 25°C
180
200
220
Initial accuracy
kHz
TJ = Full range
170
230
Voltage stability
VIN = 8 V to 40 V
2%
VCT = 2 V,
TJ = 25°C
7.5
8
8.8
Discharge current
mA
VCT = 2 V
6.7
8
8.8
Sync output high level voltage
IO = –1 mA
2.4
3.6
V
Sync output low level voltage
IO = 1 mA
0.2
0.4
V
Sync input high level voltage
CT = 0 V, RT = VREF
2
1.5
V
Sync input low level voltage
CT = 0 V, RT = VREF
1.5
0.8
V
Sync input current
CT = 0 V, RT = VREF,VSYNC = 5 V
1
10
µA
Sync delay to outputs
CT = 0 V RT = VREF, VSYNC = 0.8 V to 2 V
50
100
ns
(1)
All voltages are with respect to GND. Currents are positive into, negative out of the specified terminal.
(2)
This parameter, although specified over the recommended operating conditions, is not 100% tested in production.
Copyright
© 2004–2011, Texas Instruments Incorporated
3


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