UC3842 データシートの表示（PDF） - KEXIN Industrial
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コンポーネント説明
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UC3842 Datasheet PDF : 3 Pages
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SMD Type
Integrate Circuit
CURRENT MODE PWM CONTROLLER
UC3842
■ Features
● Low Start up Current
● Maximum Duty Clamp
● UVLO With Hysteresis
● Operating Frequency up to 500KHz
SOP-8
■ Functional Block Diagram
VREF 8
Internal
Bias
5V
VREF
SET/
RESET
Good LOGIC
UVLO
VFB 2
COMP 1
1/2VREF
Error Amp
+
-
1/3
1V
C.S PWM
Comp. LATCH
R
S
C.S 3
T
RT/CT 4
OSCILLATOR
7 VCC
29V
5 GND
7
PWR
VC
22V 6 OUTPUT
5
PWR
GND
■ Absolute Maximum Ratings Ta = 25℃
Parameter
Supply Voltage
Output Current
Analog Inputs
Error Amp Output Sink Current
Power Dissipation at TA≤25℃
Storage Temperature Range
Lead Temperature
Thermal Resistance Junction-ambient
Symbol
VCC
IO
V(ANA)
ISINK (E.A)
PD(Note1,2)
TSTG
TLEAD
Rthj-a
Ratings
30
±1
-0.3 to 6.3
10
460
-65 ~ +150
+300
125
Units
V
A
V
mA
mW
℃
℃
℃/W
1
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