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參數(shù)資料
| 型號： | 5962-8990503EA |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 2.2 A SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, CDIP16 |
| 封裝： | DIP-16 |
| 文件頁數(shù)： | 14/19頁 |
| 文件大?。?/td> | 623K |
| 代理商： | 5962-8990503EA |
4
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNITS
Current Limit/Start Sequence/Fault Section (cont.)
Over Current Threshold
1.14
1.2
1.26
V
ILIM Delay to Output
VILIM
= 0 to 2V Step (Note 1)
50
80
ns
Output Section
Output Low Saturation
IOUT
= 20mA
0.25
0.4
V
IOUT = 200mA
1.2
2.2
V
Output High Saturation
IOUT
= 20mA
1.9
2.9
V
IOUT = 200mA
2
3
V
UVLO Output Low Saturation
IO
= 20mA
0.8
1.2
V
Rise/Fall Time
CL
= 1nF (Note 1)
20
45
ns
UnderVoltage Lockout
Start Threshold
UCX823B and X825B only
16
17
V
Stop Threshold
UCX823B and X825B only
9
10
V
UVLO Hysteresis
UCX823B and X825B only
5
6
7
V
Start Threshold
UCX823A and X825A only
8.4
9.2
9.6
V
UVLO Hysteresis
UCX823A and X825A only
0.4
0.8
1.2
V
Supply Current
Startup Current
VC
= VCC = VTH(start) - 0.5V
100
300
A
Icc
28
36
mA
UC1823A,B/1825A,B
UC2823A,B/2825A,B
UC3823A,B/3825A,B
Note 1: Guaranteed by design. Not 100% tested in production.
ELECTRICAL CHARACTERISTICS (cont.) Unless otherwise stated, these specifications apply for TA =
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, TA = TJ.
OSCILLATOR
The UC3823A,B/3825A,B oscillator is a saw tooth. The
rising edge is governed by a current controlled by the RT
pin and value of capacitance at the CT pin. The falling
edge of the sawtooth sets dead time for the outputs. Se-
lection of RT should be done first, based on desired max-
imum duty cycle. CT can then be chosen based on de-
sired frequency, RT, and DMAX. The design equations
are:
RT =
CT =
Recommended values for RT range from 1k to 100k.
Control of DMAX less than 70% is not recommended.
(1.6 DMAX)
(RT F)
3V
(10mA) (1 - DMAX)
APPLICATIONS INFORMATION
Oscillator
UDG-95102
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