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UC3842BN Electronic IC Chip HIGH PERFORMANCE CURRENT MODE PWM CONTROLLER
UC3842BN Electronic IC Chip HIGH PERFORMANCE CURRENT MODE PWM CONTROLLER
Specifications
Model Number :
UC3842BN
Certification :
new & original
Place of Origin :
original factory
MOQ :
10pcs
Price :
Negotiate
Payment Terms :
T/T, Western Union, Paypal
Supply Ability :
7800pcs
Delivery Time :
1 day
Packaging Details :
Please contact me for details
Description :
Boost, Flyback Regulator Positive, Isolation Capable Output Step-Up, Step-Up/Step-Down DC-DC Controller IC 8-Mini DIP
Supply Voltage (low impedance source) :
30 V
Output Current :
±1 A
Output Energy (capacitive load) :
5 µJ
Analog Inputs (pins 2, 3) :
– 0.3 to 5.5 V
Storage Temperature :
– 65 to 150 °C
Junction Operating Temperature :
– 40 to 150 °C
Description

Stock Offer (Hot Sell)

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UC2842B/3B/4B/5B

UC3842B/3B/4B/5B

HIGH PERFORMANCE CURRENT MODE PWM CONTROLLER

. TRIMMED OSCILLATOR FOR PRECISE FREQUENCY CONTROL

. OSCILLATOR FREQUENCY GUARANTEED AT 250kHz

. CURRENT MODE OPERATION TO 500kHz

. AUTOMATIC FEED FORWARD COMPENSATION

. LATCHING PWM FOR CYCLE-BY-CYCLE CURRENT LIMITING

. INTERNALLY TRIMMED REFERENCE WITH UNDERVOLTAGE LOCKOUT

. HIGH CURRENT TOTEM POLE OUTPUT

. UNDERVOLTAGE LOCKOUT WITH HYSTERESIS

. LOW START-UP AND OPERATING CURRENT

DESCRIPTION

TheUC384xBfamilyofcontrolICsprovidesthenecessary features to implement off-line or DC to DC fixed frequencycurrent mode control schemes with a minimal external parts count. Internally implemented circuits includea trimmed oscillator for precise DUTY CYCLE CONTROL under voltage lockoutfeaturingstart-upcurrentless than0.5mA,a precision reference trimmed for accuracy at the error amp input,logicto insurelatchedoperation,a PWM comparatorwhich alsoprovidescurrentlimit control, and a totem pole output stage designed to source or sink high peakcurrent.Theoutputstage,suitable for driving N-Channel MOSFETs, is low in the offstate.

Differences between members of this family are the under-voltagelockout thresholdsand maximum duty cycle ranges. The UC3842B and UC3844B have UVLO thresholds of 16V (on) and 10V (off), ideally suitedoff-lineapplicationsThecorrespondiCM GROUPhresholdsfortheUC3843BandUC3845Bare8.5Vand7.9 V. The UC3842B and UC3843B can operateto duty cycles approaching 100%. A range of the zero to < 50 % is obtainedby the UC3844Band UC3845Bby theadditionofan internaltoggleflip flopwhich blanks the outputoff everyotherclock cycle.

ABSOLUTE MAXIMUM RATINGS

Symbol Parameter Value Unit
Vi Supply Voltage (low impedance source) 30 V
Vi Supply Voltage (Ii < 30mA) Self Limiting
IO Output Current ±1 A
EO Output Energy (capacitive load) 5 µJ
Analog Inputs (pins 2, 3) – 0.3 to 5.5 V
Error Amplifier Output Sink Current 10 mA
Ptot Power Dissipation at Tamb ≤ 25 °C (Minidip) 1.25 W
Ptot Power Dissipation at Tamb ≤ 25 °C (SO8) 800 mW
Tstg Storage Temperature Range – 65 to 150 °C
TJ Junction Operating Temperature – 40 to 150 °C
TL Lead Temperature (soldering 10s) 300 °C

* All voltages are with respect to pin 5, all currents are positive into the specified terminal.

BLOCK DIAGRAM (toggle flip flop used only in UC3844B and UC3845B)

PIN CONNECTION (top view)

Product tags

pwm controller ic

,

inverter igbt mma 200

,

power ic chip 3s111
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UC3842BN Electronic IC Chip HIGH PERFORMANCE CURRENT MODE PWM CONTROLLER

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Product Detail
Model Number :
UC3842BN
Certification :
new & original
Place of Origin :
original factory
MOQ :
10pcs
Price :
Negotiate
Payment Terms :
T/T, Western Union, Paypal
Contact Supplier
UC3842BN Electronic IC Chip HIGH PERFORMANCE CURRENT MODE PWM CONTROLLER

ChongMing Group (HK) Int'l Co., Ltd

Active Member
3 Years
shenzhen
Since 2008
Business Type :
Distributor/Wholesaler
Main Products :
Flash Memory IC Chip, Programmable IC Chip, Computer IC Chips
Total Annual :
5000000-7000000
Employee Number :
80~100
Certification Level :
Active Member
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