UC3844N ON Semiconductor, UC3844N Datasheet - Page 5

• Manufacturer Part Number: UC3844N
• Description: IC CTRLR CURRENT MODE HP 8DIP
• Manufacturer: ON Semiconductor
• Type: High Performance Current Mode Controllersr

Specifications of UC3844N

• Pwm Type: Current Mode
• Number Of Outputs: 1
• Frequency - Max: 60kHz
• Duty Cycle: 50%
• Voltage - Supply: 11.5 V ~ 25 V
• Buck: No
• Boost: Yes
• Flyback: Yes
• Inverting: Yes
• Doubler: No
• Divider: No
• Cuk: No
• Isolated: Yes
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 8-DIP (0.300", 7.62mm)
• Frequency-max: 60kHz
• Output Voltage Range: 4.9 V to 5.1 V
• Input Voltage Range: 30 V
• Operating Temperature Range: 0 C to + 70 C
• Mounting Style: Through Hole
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: UC3844NOS

−1.0
−2.0
−4.0
−8.0
−12
−16
−20
−24
3.0
2.0
1.0
0
0
0
0
0
Figure 10. Reference Load Regulation
Figure 12. Output Saturation Voltage
Figure 8. Reference Voltage Change
20
V
CC
I
ref
T
T
T
A
, REFERENCE SOURCE CURRENT (mA)
A
A
200
= −55°C
I
= 25°C
O
= 125°C
versus Source Current
, OUTPUT LOAD CURRENT (mA)
versus Load Current
40
Sink Saturation
Source Saturation
(Load to V
(Load to Ground)
2.0 ms/DIV
T
T
A
400
A
60
= −55°C
= 25°C
CC
)
V
I
T
O
A
CC
80
= 1.0 mA to 20 mA
T
= 25°C
A
= 15 V
= −55°C
600
80 ms Pulsed Load
GN
V
120 Hz Rate
D
V
CC
CC
100
T
A
= 15 V
= 15 V
= 25°C
http://onsemi.com
120
800
5
90%
10%
110
90
70
50
−55
Figure 9. Reference Short Circuit Current
Figure 11. Reference Line Regulation
−25
Figure 13. Output Waveform
T
A
0
, AMBIENT TEMPERATURE (°C)
versus Temperature
2.0 ms/DIV
25
50 ns/DIV
50
V
T
A
CC
75
= 25°C
= 12 V to 25 V
V
C
T
V
R
A
CC
L
CC
L
= 25°C
= 1.0 nF
≤ 0.1 W
= 15 V
= 15 V
100
125