UC3842BN STMicroelectronics, UC3842BN Datasheet - Page 6
![IC CURR-MODE PWM CTRLR 8-MINIDIP](/photos/1/39/13944/497-8-dip_sml.jpg)
UC3842BN
Manufacturer Part Number
UC3842BN
Description
IC CURR-MODE PWM CTRLR 8-MINIDIP
Manufacturer
STMicroelectronics
Datasheet
1.UC3845BD1013TR.pdf
(15 pages)
Specifications of UC3842BN
Pwm Type
Current Mode
Number Of Outputs
1
Frequency - Max
500kHz
Duty Cycle
100%
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
500kHz
Duty Cycle (max)
100 %
Output Voltage
5.1 V
Output Current
1000 mA (Max)
Mounting Style
Through Hole
Switching Frequency
500 KHz
Operating Supply Voltage
30 V
Maximum Operating Temperature
+ 150 C
Fall Time
50 ns
Minimum Operating Temperature
- 40 C
Rise Time
50 ns
Synchronous Pin
No
Topology
Boost or Flyback or Forward
Number Of Pwm Outputs
1
On/off Pin
No
Adjustable Output
No
Switching Freq
500kHz
Operating Supply Voltage (max)
30V
Operating Temperature Classification
Automotive
Mounting
Through Hole
Pin Count
8
Package Type
PDIP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
497-3079-5
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
UC3842BN
Manufacturer:
ST
Quantity:
9 654
Company:
Part Number:
UC3842BN
Manufacturer:
COPAL
Quantity:
5 510
Part Number:
UC3842BN
Manufacturer:
ST
Quantity:
20 000
Part Number:
UC3842BNG
Manufacturer:
ON/安森美
Quantity:
20 000
UC2842B/3B/4B/5B - UC3842B/3B/4B/5B
Figure 4: Oscillator Discharge Current vs. Tem-
Figure 6: Error Amp Open-Loop Gain and
Figure 8: Reference Voltage Change vs.
6/15
(dB)
I
-20
(mA)
80
60
40
20
dischg
60
50
40
30
20
10
0
8.5
8.0
7.5
7.0
0
10
0
-55
perature.
Phase vs. Frequency.
Source Current.
T
100
20
A
-25
=125˚C
40
1K
0
Gain
25
10K
60
T
A
50
=-40˚C
V
V
R
T
100K
V
80
A
i
O
L
V
V
=15V
=100K
=25˚C
i
=2V to 4V
=15V
i
OSC
=15V
75
100 I
=2V
1M
Phase
D95IN337
D95IN339
100 T
D95IN335
ref
f(Hz)
(mA)
A
(˚C)
120
150
180
30
60
90
Figure 5: Maximum Output Duty Cycle vs. Tim-
Figure 7: Current Sense Input Threshold vs. Er-
Figure 9: Reference Short Circuit Current vs.
D
(%)
max
90
80
70
60
50
40
(mA)
100
I
V
1.0
0.8
0.6
0.4
0.2
0.0
SC
90
80
70
60
50
(V)
0.8
th
-55
0
1
T
ing Resistor.
ror Amp Output Voltage.
Temperature.
V
A
-25
i
=125˚C
=15V
I
T
dischg
A
=25˚C
2
=7.5mA
0
T
A
2
=-40˚C
25
I
dischg
4
=8.8mA
50
3
V
R
i
L
=15V
75
0.1
6
V
C
T
A
i
T
=15V
=25˚C
=3.3nF
100 T
D95IN340
D95IN338
5
V
D95IN336
O
A
(V)
(˚C)
R
T
(K )