uc3842bn1 ON Semiconductor, uc3842bn1 Datasheet - Page 4

• Manufacturer Part Number: uc3842bn1
• Description: High Performance Current Mode Controllers
• Manufacturer: ON Semiconductor

8. Adjust V
9. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient as possible.
ELECTRICAL CHARACTERISTICS
T
PWM SECTION
TOTAL DEVICE
A
Duty Cycle
Power Supply Current
Power Supply Zener Voltage (I
T
T
NCV3843BV: T
change control.
is the operating ambient temperature range that applies [Note 9], unless otherwise noted.)
low
high
Maximum (UC284XB, UC384XB)
Maximum
Minimum
Startup (V
Startup
Operating (Note 8)
= 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
Figure 4. Oscillator Discharge Current
(V
above the Startup threshold before setting to 15 V.
CC
CC
(UC384XBV)
versus Oscillator Frequency
low
= 6.5 V for UCX843B,
14 V for UCX842B, BV)
Characteristics
Figure 2. Timing Resistor
= –40 C, T
versus Temperature
UC3842B, UC3843B, UC2842B, UC2843B, NCV3843BV
CC
high
= 25 mA)
= +125 C. Guaranteed by design. NCV prefix is for automotive and other applications requiring site and
(V
CC
= 15 V [Note 8], R
http://onsemi.com
Symbol
DC
I
DC
CC
V
(max)
(min)
+ I
Z
C
T
= 10 k, C
4
Min
94
30
–
–
–
–
T
= 3.3 nF, for typical values T
UC284XB
Typ
0.3
96
12
36
Figure 5. Maximum Output Duty Cycle
–
–
versus Oscillator Frequency
Figure 3. Output Deadtime
Max
0.5
versus Timing Resistor
17
–
–
0
–
Min
94
93
30
–
–
–
A
UC384XB, BV
= 25 C, for min/max values
Typ
0.3
96
96
12
36
–
Ω
Max
0.5
17
–
–
0
–
Unit
mA
%
V