Current-Mode PWM Controller - UC3843

UC3843 (ACTIVE)

Current-Mode PWM Controller

 

Parametrics Compare all products in PWM and Resonant Controller

 
Topology
Control Method
Vin (Min) (V)
Vin (Max) (V)
Frequency (Max) (kHz)
UVLO Thresholds On/Off (V)
Duty Cycle (Max) (%)
Gate Drive (Typ) (A)
Special Features
Rating
Operating Temperature Range (C)
Pin/Package
UC3843 LM5021 LM5021-Q1 UC1843 UC2843 UC3842 UC3845
Boost
Buck
Buck-Boost
Flyback
Forward   
Flyback
Forward   
Flyback
Forward   
Boost
Flyback
Forward   
Boost
Buck
Buck-Boost
Flyback
Forward   
Boost
Buck
Buck-Boost
Flyback
Forward   
Boost
Buck
Buck-Boost
Flyback
Forward   
Peak Current Mode    Current    Current    Current    Peak Current Mode    Peak Current Mode    Peak Current Mode   
9    8    8    7.6    9    17    9   
400    30    30    30    400    400    400   
500    1000    1000    500    500    500    500   
8.4/7.6    20/7.25    20/7.25    8.4/7.6    8.4/7.6    16/10    8.4/7.6   
100    80    80    100    100    100    50   
1    0.3    0.3    1    1    1    1   
Error Amplifier
Multi-topology   
SSR
DCM
CCM
Frequency Synchronization
Smart Meters Compatible
Audio Compatible
Motor Drive Compatible
Power Delivery Compatible   
SSR
DCM
CCM
Frequency Synchronization
Automotive   
Error Amplifier
Multi-topology   
Error Amplifier
Multi-topology   
Error Amplifier
Multi-topology   
Error Amplifier
Multi-topology   
Catalog    Catalog    Automotive    Military    Military    Catalog    Catalog   
0 to 70    -40 to 125    -40 to 125    -55 to 125    -40 to 85    0 to 70    0 to 70   
14SOIC
8PDIP
8SOIC   
8PDIP
8VSSOP   
8VSSOP    20LCCC
8CDIP   
14SOIC
8PDIP
8SOIC   
14SOIC
8PDIP
8SOIC   
14SOIC
8PDIP
8SOIC   

Other qualified versions of UC3843

Version Part Number Definition
Military UC1843 QML certified for Military and Defense Applications

WEBENCH® Designer UC3843

 AC  DC  
AC Frequency  60 Hz  50 Hz
Use Isolated Output?
  Min   Max Range
VinRMS  V 15.00 to 480.00V
Vout  V 3.3 to 50.0V
Iout  A ≤ 20.0A
Ambient Temp  °C 0 to 70°C