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LM3842/3

SKU: LM3842/3

  • HTC KOREA

Current mode PWM controller (offline)

HTC Korea LM384xA are fixed frequency current-mode PWM controller. They are specially designed for Off-Line and DC-to-DC converter applications with minimal external components. These integrated circuits features a trimmed oscillator for precise duty cycle control, a temperature compensated reference, high gain error amplifier,  current sensing comparator, and a high current totempole output ideally suited for  driving a power MOSFET. Protection circuitry includes built in under-voltage lockout and current limiting.

 

LM3842/3 features :

  • Automatic feed forward compensation
  • Optimized for offline converter
  • Double pulse suppression
  • Current mode operation to 500kHz
  • High gain totem pole output
  • Internally trimmed bandgap reference
  • Undervoltage lockout with hysteresis
  • Low start up current: < 0.3mA
  • Moisture sensitivity level 3

 

 

Device
 
Package

LM3842A/3A/4A/5AD

SOP-8

LM3842A/3A/4A/5AN

DIP-8

 

LM3842AD cross reference

 

 

 

UC3842D

TL3842BDR-8

TI

UC3842AD/BD

ON-SEMI

UC3842BD

UC3844BD
ST
 MIC38C42BM MICROCHIP
LM3842AN cross reference   

UC3842N

TL3842BP

TI
UC3842AN/BN
ON-SEMI

UC3842BN

UC3844BN
ST
MIC38C42BN
MICROCHIP
LM3843AD cross reference   

UC3843D

TL3843BDR-8

TI

UC3843BD

UC3845BD

ST
UC3843AD/BD
ON-SEMI
MIC38C43BM
MICROCHIP
LM3843AN cross reference   

UC3843N

TL3843BP

TI

UC3843BN

UC3845BN

ST
UC3843AN/BN
ON-SEMI
MIC38C43BN
MICROCHIP

Part in black : pin to pin compatible
Part in blue: Same pin configurationbut different characteristics.
Part in green: Same function but different pin configuration or characteristics.

 

Converter & controller - PWM
Device
Name 
Supply voltage VCC [V] Reference output VREF[V]Frequency (max)  [KHz]UVLO threshold VTH[V]Duty cycle (max) [%] Package
LM3842/330 (absolute)550016/8.4100SOP-8 / DIP-8

 

HTC Korea converters controllers are designed in South Korea. High quality products, they will match your application needs.