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UC2842BNG Datasheet(PDF) 4 Page - ON Semiconductor

No. de pieza UC2842BNG
Descripción Electrónicos  High Performance Current Mode Controllers
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Fabricante Electrónico  ONSEMI [ON Semiconductor]
Página de inicio  http://www.onsemi.com
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UC2842BNG Datasheet(HTML) 4 Page - ON Semiconductor

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UC3842B, UC3843B, UC2842B, UC2843B, NCV3843BV
http://onsemi.com
4
ELECTRICAL CHARACTERISTICS (VCC = 15 V [Note 5], RT = 10 k, CT = 3.3 nF. For typical values TA = 25°C, for min/max values
TA is the operating ambient temperature range that applies [Note 6], unless otherwise noted.)
UC284XB
UC384XB, XBV
Characteristics
Symbol
Min
Typ
Max
Min
Typ
Max
Unit
OUTPUT SECTION
Output Voltage
Low State (ISink = 20 mA)
(ISink = 200 mA)
UC284XB, UC384XB
UC384XBV
High State
(ISource = 20 mA)
UC284XB, UC384XB
UC384XBV
(ISource = 200 mA)
VOL
VOH
13
12
0.1
1.6
13.5
13.4
0.4
2.2
13
12.9
12
0.1
1.6
1.6
13.5
13.5
13.4
0.4
2.2
2.3
V
Output Voltage with UVLO Activated (VCC = 6.0 V, ISink = 1.0 mA)
VOL(UVLO)
0.1
1.1
0.1
1.1
V
Output Voltage Rise Time (CL = 1.0 nF, TJ = 25°C)
tr
50
150
50
150
ns
Output Voltage Fall Time (CL = 1.0 nF, TJ = 25°C)
tf
50
150
50
150
ns
UNDERVOLTAGE LOCKOUT SECTION
Startup Threshold (VCC)
UCX842B, BV
UCX843B, BV
Vth
15
7.8
16
8.4
17
9.0
14.5
7.8
16
8.4
17.5
9.0
V
Minimum Operating Voltage After Turn−On (VCC)
UCX842B, BV
UCX843B, BV
VCC(min)
9.0
7.0
10
7.6
11
8.2
8.5
7.0
10
7.6
11.5
8.2
V
PWM SECTION
Duty Cycle
Maximum UC284XB, UC384XB
Maximum UC384XBV
Minimum
DC(max)
DC(min)
94
96
0
94
93
96
96
0
%
TOTAL DEVICE
Power Supply Current
Startup (VCC = 6.5 V for UCX843B,
Startup VCC 14 V for UCX842B, BV)
(Note 5)
ICC + IC
0.3
12
0.5
17
0.3
12
0.5
17
mA
Power Supply Zener Voltage (ICC = 25 mA)
VZ
30
36
30
36
V
5. Adjust VCC above the Startup threshold before setting to 15 V.
6. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient as possible.
Tlow = 0°C for UC3842B, UC3843B; −25°C for UC2842B, UC2843B; −40°C for UC3842BV, UC3843BV
Thigh = +70°C for UC3842B, UC3843B; +85°C for UC2842B, UC2843B; +105°C for UC3842BV, UC3843BV
NCV3843BV: Tlow = −40°C, Thigh = +125°C. Guaranteed by design. NCV prefix is for automotive and other applications requiring site and
change control.


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