UC3843BVDG ON Semiconductor, UC3843BVDG Datasheet - Page 6
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UC3843BVDG
Manufacturer Part Number
UC3843BVDG
Description
IC CTRLR CURRENT MODE HP 14SOIC
Manufacturer
ON Semiconductor
Datasheet
1.UC3842BDR2G.pdf
(21 pages)
Specifications of UC3843BVDG
Pwm Type
Current Mode
Number Of Outputs
1
Frequency - Max
275kHz
Duty Cycle
96%
Voltage - Supply
8.2 V ~ 25 V
Buck
No
Boost
Yes
Flyback
Yes
Inverting
No
Doubler
No
Divider
No
Cuk
No
Isolated
Yes
Operating Temperature
-40°C ~ 105°C
Package / Case
14-SOIC (3.9mm Width), 14-SOL
Frequency-max
275kHz
Duty Cycle (max)
96 %
Output Current
1000 mA
Mounting Style
SMD/SMT
Switching Frequency
500 KHz
Maximum Operating Temperature
+ 105 C
Fall Time
50 ns
Minimum Operating Temperature
- 40 C
Rise Time
50 ns
Synchronous Pin
No
Topology
Boost, Flyback, Forward
Number Of Pwm Outputs
1
On/off Pin
No
Adjustable Output
No
Switching Freq
500KHz
Operating Supply Voltage (max)
30V
Operating Temperature Classification
Industrial
Mounting
Surface Mount
Pin Count
14
Package Type
SOIC
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
UC3843BVDGOS
- 4.0
- 8.0
- 20
- 24
- 20
-12
-16
100
80
60
40
20
0
0
10
0
Figure 8. Error Amp Open Loop Gain and
Figure 12. Reference Load Regulation
Figure 10. Reference Voltage Change
100
20
I
Ä Ä Ä Ä
ref
T
, REFERENCE SOURCE CURRENT (mA)
A
Phase versus Frequency
= 125°C
versus Source Current
1.0 k
40
Gain
f, FREQUENCY (Hz)
Ä Ä Ä Ä
Ä Ä Ä Ä
2.0 ms/DIV
10 k
T
60
A
= 25°C
V
I
T
100 k
O
A
CC
80
= 1.0 mA to 20 mA
= 25°C
V
V
R
T
= 15 V
A
CC
O
L
Ä Ä Ä Ä
Ä Ä Ä
Ä Ä Ä
= 25°C
= 100 K
= 2.0 V to 4.0 V
T
= 15 V
A
V
= -55°C
CC
100
1.0 M
Phase
= 15 V
http://onsemi.com
10 M
120
0
30
60
90
120
150
180
6
110
90
70
50
1.2
1.0
0.8
0.6
0.4
0.2
- 55
0
0
Figure 11. Reference Short Circuit Current
V
CC
Figure 9. Current Sense Input Threshold
- 25
Figure 13. Reference Line Regulation
= 15 V
versus Error Amp Output Voltage
T
A
V
= 125°C
T
2.0
O
T
A
, ERROR AMP OUTPUT VOLTAGE (V)
A
, AMBIENT TEMPERATURE (°C)
= 25°C
versus Temperature
0
25
T
2.0 ms/DIV
A
= -55°C
4.0
50
V
T
A
CC
= 25°C
= 12 V to 25
75
6.0
Ä Ä Ä
Ä Ä Ä
V
R
CC
L
≤ 0.1 W
= 15 V
100
125
8.0