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UC1844JQMLV Datasheet(Folha de dados) 4 Page - TI store

Nome de Peças. UC1844JQMLV
descrição  Current Mode PWM Controller
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Fbricantes  TI [TI store]
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PARAMETER
TEST CONDITION
UC1842/3/4/5
UC2842/3/4/5
UC3842/3/4/5
UNITS
MIN
TYP
MAX
MIN
TYP
MAX
Output Section
Output Low Level
ISINK = 20mA
0.1
0.4
0.1
0.4
V
ISINK = 200mA
1.5
2.2
1.5
2.2
V
Output High Level
ISOURCE = 20mA
13
13.5
13
13.5
V
ISOURCE = 200mA
12
13.5
12
13.5
V
Rise Time
TJ = 25°C, CL = 1nF (Note 2)
50
150
50
150
ns
Fall Time
TJ = 25°C, CL = 1nF (Note 2)
50
150
50
150
ns
Under-voltage Lockout Section
Start Threshold
X842/4
15
16
17
14.5
16
17.5
V
X843/5
7.8
8.4
9.0
7.8
8.4
9.0
V
Min. Operating Voltage
After Turn On
X842/4
9
10
11
8.5
10
11.5
V
X843/5
7.0
7.6
8.2
7.0
7.6
8.2
V
PWM Section
Maximum Duty Cycle
X842/3
95
97
100
95
97
100
%
X844/5
46
48
50
47
48
50
%
Minimum Duty Cycle
0
0
%
Total Standby Current
Start-Up Current
0.5
1
0.5
1
mA
Operating Supply Current
VPIN 2 =VPIN 3 = 0V
1117
1117
mA
VCC Zener Voltage
ICC = 25mA
30
34
30
34
V
Note 2:
These parameters, although guaranteed, are not 100% tested in production.
Note 3:
Parameter measured at trip point of latch with VPIN 2 =0
.
Note 4:
Gain defined as: A
VPIN
VPIN
VPIN
V
=≤
1
3
03 0 8
;. .
Note 5:
Adjust VCC above the start threshold before setting at 15V.
Note 6:
Output frequency equals oscillator frequency for the UC1842 and UC1843.
Output frequency is one half oscillator frequency for the UC1844 and UC1845.
UC1842/3/4/5
UC2842/3/4/5
UC3842/3/4/5
ELECTRICAL CHARACTERISTICS:
Unless otherwise stated, these specifications apply for
−55°C ≤ TA ≤ 125°C for the
UC184X;
−40°C ≤ TA ≤ 85°C for the UC284X; 0°C ≤ TA ≤ 70°C for the 384X; VCC =
15V (Note 5); RT = 10k; CT = 3.3nF, TA=TJ.
ERROR AMP CONFIGURATION
Error Amp can Source or Sink up to 0.5mA




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