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UC2845AQ 데이터시트(PDF) 4 Page - Texas Instruments

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부품명 UC2845AQ
상세설명  CURRENT-MODE PWM CONTROLLER
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제조업체  TI [Texas Instruments]
홈페이지  http://www.ti.com
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UC2845AQ 데이터시트(HTML) 4 Page - Texas Instruments

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UC2842AQ, UC2843AQ, UC2844AQ, UC2845AQ
CURRENT-MODE PWM CONTROLLER
SGLS164 – APRIL 2003
4
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)†‡
VCC voltage (low impedance source)
30 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
VCC voltage (ICC mA)
self limiting
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output current, IO
±1 A
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output energy (capacitive load)
5
µJ
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Analog Inputs (pins 3, 5)
–0.3 V to 6.3 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Error Amp Output Sink current
10 mA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Dissipation at TA < +25_C (D package)
1 W
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Package thermal impedance,
θJA (see Note 1): D (8-pin) package
97
°C/W
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage temperature range, Tstg
–65
_C to 150_C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lead temperature soldering 1,6 mm (1/16 inch) from case for 10 seconds
260
_C
. . . . . . . . . . . . . . . . . . . . . . .
† 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.
‡ Unless otherwise indicated, voltages are reference to ground and currents are positive into and negative out of the specified terminals.
NOTE 1: Long term high–temperature storage and/or extended use at maximum recommended operating conditions may result in a reduction of
overall device life. See http://www.ti.com/ep_quality for additional information on enhanced plastic packaging.
electrical characteristics, TA = –40_C to 125_C, VCC = 15 V (see Note 1), RT = 10 kΩ, CT = 3.3 nF, and
TA = TJ (unless otherwise stated)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNITS
Reference Section
Output voltage
TJ = 25_C,
IO = 1 mA
4.95
5.0
5.05
V
Line regulation voltage
VIN = 12 V to 25 V
6
20
mV
Load regulation voltage
IO = 1 mA to 20 mA
6
25
mV
Temperature stability
See Notes 2 and 3
0.2
0.4
mV/
_C
Total output variation voltage
Line, Load, Temp.
4.9
5.1
V
Output noise voltage
f = 10 Hz to 10 kHz,
See Note 2
TJ = 25_C
50
µV
Long term stability
1000 hours,
See Note 2
TA = 125_C
5
25
mV
Output short-circuit current
–30
–100
–180
mA
Oscillator Section
Initial accuracy
See Note 4
TJ = 25_C
47
52
57
kHz
Voltage stability
VCC = 12 V to 25 V
0.2
1
%
Temperature stability
TA = MIN to MAX, See Note 2
5
%
Amplitude peak-to-peak
V pin 7,
See Note 2
1.7
V
Discharge current
V pin 7
2 V
See Note 5
TJ = 25_C
7.8
8.3
8.8
mA
Discharge current
V pin 7 = 2 V,
See Note 5
TJ = Full range
7.5
8.8
mA


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