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參數(shù)資料
| 型號： | UCX823B |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | High Speed PWM Controller |
| 中文描述： | 高速PWM控制器 |
| 文件頁數(shù)： | 2/9頁 |
| 文件大?。?/td> | 456K |
| 代理商： | UCX823B |
2
The UC3825A,B has dual alternating outputs and the same
pin configuration of the UC3825. The UC3823A,B outputs op-
erate in phase with duty cycles from zero to less than 100%.
The pin configuration of the UC3823A,B is the same as the
UC3823 except pin 11 is now an output pin instead of the ref-
erence pin to the current limit comparator. “A” version parts
have UVLO thresholds identical to the original UC3823/25.
The “B” versions have UVLO thresholds of 16 and 10V, in-
tended for ease of use in off-line applications.
Consult Application Note U-128 for detailed technical and ap-
plications information. Contact the factory for further pack-
aging and availability information.
UC1823A,B/1825A,B
UC2823A,B/2825A,B
UC3823A,B/3825A,B
CONNECTION DIAGRAMS
Supply Voltage (VC, VCC)....................................................22V
Output Current, Source or Sink (Pins OUTA, OUTB)
DC ..................................................................................0.5A
Pulse (0.5
μ
s)...................................................................2.2A
Power Ground (PGND) ......................................................
±
0.2V
Analog Inputs
(INV, NI, RAMP)...................................................
0.3V to 7V
(ILIM, SS).............................................................
0.3V to 6V
Clock Output Current (CLK/LEB) .......................................
5mA
Error Amplifier Output Current (EAOUT)..............................5mA
Soft Start Sink Current (SS)...............................................20mA
Oscillator Charging Current (RT)........................................
5mA
Power Dissipation at T
A
=
60
°
C..............................................1W
Storage Temperature Range............................
65
°
C to
+
150
°
C
Junction Temperature.......................................
55
°
C to
+
150
°
C
Lead Temperature (Soldering, 10 sec.).............................300
°
C
All currents are positive into, negative out of the specified terminal.
Consult Packaging Section of Databook for thermal limitations
and considerations of packages.
DIL-16, SOIC-16, (Top View)
J or N Package; DW Package
PLCC-20, LCC-20, (Top View)
Q, L Packages
Device
UVLO
D
MAX
UC3823A
UC3823B
UC3825A
UC3825B
9.2V/8.4V
16V/10V
9.2V/8.4V
16V/10V
<
100%
<
100%
<
50%
<
50%
DESCRIPTION (cont.)
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
Unless otherwise stated, these specifications apply for T
A
=
55
°
C to
+
125
°
C for the
UC1823A,B and UC1825A,B;
40
°
C to
+
85
°
C for the UC2823A,B and UC2825A,B; 0
°
C to
+
70
°
C for the UC3823A,B and
UC3825A,B; RT
=
3.65k, CT
=
1nF, VCC
=
12V, T
A
=
T
J
.
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNITS
Reference Section
Output Voltage
T
J
=
25
°
C, Io
=
1mA
12
<
VCC
<
20V
1mA
<
Io
<
10mA
Line, Load, Temp
T
MIN
<
T
A
<
T
MAX
(Note 1)
10Hz
<
f
<
10kHz (Note 1)
T
J
=
125
°
C, 1000 hours (Note 1)
VREF
=
0V
5.05
5.1
5.15
V
Line Regulation
2
15
mV
Load Regulation
5
20
mV
Total Output Variation
5.03
5.17
V
Temperature Stability
0.2
0.4
mV/
°
C
μ
VRMS
mV
Output Noise Voltage
50
Long Term Stability
5
25
Short Circuit Current
30
60
90
mA
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