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UC3843AD Scheda tecnica(PDF) 2 Page - ON Semiconductor

Il numero della parte UC3843AD
Spiegazioni elettronici  High Performance Current Mode Controllers
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Produttore elettronici  ONSEMI [ON Semiconductor]
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UC3843AD Scheda tecnica(HTML) 2 Page - ON Semiconductor

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UC3842A, UC3843A, UC2842A, UC2843A
http://onsemi.com
2
Figure 1. Simplified Block Diagram
5.0V
Reference
Latching
PWM
VCC
Undervoltage
Lockout
Oscillator
Error
Amplifier
7(12)
VC
7(11)
Output
6(10)
Power
Ground
5(8)
3(5)
Current
Sense
Input
Vref
8(14)
4(7)
2(3)
1(1)
GND
5(9)
RTCT
Voltage
Feedback
Input
R
R
+
Vref
Undervoltage
Lockout
Output
Compensation
Pin numbers in parenthesis are for the D suffix SOIC−14 package.
VCC
MAXIMUM RATINGS
Rating
Symbol
Value
Unit
Bias and Driver Voltages (Zero Series Impedance, see also Total Device spec)
VCC, VC
30
V
Total Power Supply and Zener Current
(ICC + IZ)
30
mA
Output Current, Source or Sink (Note 1)
IO
1.0
A
Output Energy (Capacitive Load per Cycle)
W
5.0
mJ
Current Sense and Voltage Feedback Inputs
Vin
− 0.3 to + 5.5
V
Error Amp Output Sink Current
IO
10
mA
Power Dissipation and Thermal Characteristics
D Suffix, Plastic Package
Maximum Power Dissipation @ TA = 25°C
Thermal Resistance, Junction−to−Air
N Suffix, Plastic Package
Maximum Power Dissipation @ TA = 25°C
Thermal Resistance, Junction−to−Air
PD
RqJA
PD
RqJA
862
145
1.25
100
mW
°C/W
W
°C/W
Operating Junction Temperature
TJ
+ 150
°C
Operating Ambient Temperature
UC3842A, UC3843A
UC2842A, UC2843A
TA
0 to + 70
− 25 to + 85
°C
Storage Temperature Range
Tstg
− 65 to + 150
°C
Maximum ratings are those values beyond which device damage can occur. Maximum ratings applied to the device are individual stress limit
values (not normal operating conditions) and are not valid simultaneously. If these limits are exceeded, device functional operation is not implied,
damage may occur and reliability may be affected.
1. Maximum Package power dissipation limits must be observed.


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