(Hong Kong)
Product Summary
TheUC384xBfamily ofcontrolICs providesthenecessary features to implement off-line or DC to DC
fixed frequency current mode control schemes with
a minimal external parts count. Internally implemented circuits include a trimmed oscillator for precise DUTY CYCLE CONTROL under voltage lockoutfeaturingstart-up currentless than0.5mA,a precision reference trimmed for accuracy at the error
amp input,logicto insurelatched operation,a PWM
comparatorwhich alsoprovidescurrentlimit control,
and a totem pole output stage designed to source
or sink high peakcurrent.The outputstage,suitable
for driving N-Channel MOSFETs, is low in the offstate
Features
.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
| Image | Part No | Mfg | Description |  |
Pricing (USD) |
Quantity | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 |
 UC3843B |
Other |
|
Data Sheet |
Negotiable |
|
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 |
UC3843BD |
ON Semiconductor |
Current Mode PWM Controllers 52kHz 1A Current PWM |
Data Sheet |
Negotiable |
|
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|
UC3843BD1 |
STMicroelectronics |
Current Mode PWM Controllers 0.5mA Current Mode |
Data Sheet |
|
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|
UC3843BD1013TR |
STMicroelectronics |
Current Mode PWM Controllers 0.5mA Current Mode |
Data Sheet |
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|
UC3843BD1G |
ON Semiconductor |
Current Mode PWM Controllers 52kHz 1A Current PWM w/96% Duty Cycle Max |
Data Sheet |
|
|
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|
UC3843BD1R2 |
ON Semiconductor |
Current Mode PWM Controllers 52kHz 1A Current PWM |
Data Sheet |
Negotiable |
|
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|
UC3843BD1R2G |
ON Semiconductor |
Current Mode PWM Controllers 52kHz 1A Current PWM w/96% Duty Cycle Max |
Data Sheet |
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|
UC3843BDG |
ON Semiconductor |
Current Mode PWM Controllers ANA SMPS PWM CNTRL |
Data Sheet |
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