UC3842BN ON Semiconductor, UC3842BN Datasheet - Page 4

• Manufacturer Part Number: UC3842BN
• Description: IC CTRLR CURRENT MODE HP 8DIP
• Manufacturer: ON Semiconductor

Specifications of UC3842BN

• Pwm Type: Current Mode
• Number Of Outputs: 1
• Frequency - Max: 275kHz
• Duty Cycle: 96%
• Voltage - Supply: 11.5 V ~ 25 V
• Buck: No
• Boost: Yes
• Flyback: Yes
• Inverting: No
• Doubler: No
• Divider: No
• Cuk: No
• Isolated: Yes
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 8-DIP (0.300", 7.62mm)
• Frequency-max: 275kHz
• Duty Cycle (max): 96 %
• Output Voltage: 4.9 V to 5.1 V
• Output Current: 1000 mA
• Mounting Style: Through Hole
• Switching Frequency: 500 KHz
• Operating Supply Voltage: 30 V
• Maximum Operating Temperature: + 70 C
• Fall Time: 50 ns
• Minimum Operating Temperature: 0 C
• Rise Time: 50 ns
• Synchronous Pin: No
• Topology: Boost, Flyback, Forward
• Case: DIP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: UC3842BNOS

7. Adjust V
8. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient as possible.
ELECTRICAL CHARACTERISTICS
T
OUTPUT SECTION
UNDERVOLTAGE LOCKOUT SECTION
PWM SECTION
TOTAL DEVICE
A
Output Voltage
High State
Output Voltage with UVLO Activated (V
Output Voltage Rise Time (C
Output Voltage Fall Time (C
Startup Threshold (V
Minimum Operating Voltage After Turn−On (V
Duty Cycle
Power Supply Current
Power Supply Zener Voltage (I
T
T
is the operating ambient temperature range that applies [Note 8], unless otherwise noted.)
Low State (I
low
high
Maximum UC284XB, UC384XB
Maximum
Minimum
Startup (V
Startup
(Note 7)
= 0°C for UC3842B, UC3843B; −25°C for UC2842B, UC2843B; −40°C for UC3842BV, UC3843BV
= +70°C for UC3842B, UC3843B; +85°C for UC2842B, UC2843B; +105°C for UC3842BV, UC3843BV
CC
V
above the Startup threshold before setting to 15 V.
(I
(I
(I
CC
CC
UC384XBV
Sink
Sink
Source
Source
14 V for UCX842B, BV)
= 6.5 V for UCX843B,
= 20 mA)
= 200 mA)
CC
= 20 mA)
= 200 mA)
Characteristics
)
L
L
= 1.0 nF, T
= 1.0 nF, T
CC
= 25 mA)
CC
J
UC284XB, UC384XB
UC384XBV
UC284XB, UC384XB
UC384XBV
= 6.0 V, I
(V
J
= 25°C)
= 25°C)
CC
CC
= 15 V [Note 7], R
)
Sink
UCX842B, BV
UCX843B, BV
UCX842B, BV
UCX843B, BV
= 1.0 mA)
http://onsemi.com
T
= 10 k, C
V
4
Symbol
V
DC
DC
I
OL(UVLO)
CC
CC(min)
V
V
V
V
(max)
OH
t
t
OL
(min)
th
+ I
r
f
Z
C
T
= 3.3 nF. For typical values T
Min
7.8
9.0
7.0
13
12
15
94
30
−
−
−
−
−
−
−
−
−
−
−
UC284XB
13.5
13.4
Typ
0.1
1.6
0.1
8.4
7.6
0.3
50
50
16
10
96
12
36
−
−
−
−
Max
150
150
0.4
2.2
1.1
9.0
8.2
0.5
17
11
17
−
−
−
−
−
−
0
−
A
12.9
14.5
Min
7.8
8.5
7.0
13
12
94
93
30
−
−
−
−
−
−
−
−
−
= 25°C, for min/max values
UC384XB, XBV
13.5
13.5
13.4
Typ
0.1
1.6
1.6
0.1
8.4
7.6
0.3
50
50
16
10
96
96
12
36
−
Max
17.5
11.5
150
150
0.4
2.2
2.3
1.1
9.0
8.2
0.5
17
−
−
−
−
−
0
−
Unit
mA
ns
ns
%
V
V
V
V
V