KA3842AC_06 FAIRCHILD [Fairchild Semiconductor], KA3842AC_06 Datasheet

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KA3842AC_06

Manufacturer Part Number
KA3842AC_06
Description
SMPS Controller
Manufacturer
FAIRCHILD [Fairchild Semiconductor]
Datasheet
©2006 Fairchild Semiconductor Corporation
KA3842AC/KA3842AE Rev. 1.0.1
KA3842AC/KA3842AE
SMPS Controller
Features
Ordering Information
Low start current 0.2mA (Typ.)
Operating range up to 500kHz
Cycle by cycle current limiting
Under Voltage Lock Out (UVLO) with hysteresis
Short shutdown delay time: Typ.100ns
High current totem-pole output
Output swing limiting: 22V
Part Number
KA3842AC
KA3842AE
Temp. Range
Operating
-0 to +70°C
1
Pb-Free
Description
The KA3842AC/KA3842AE are fixed PWM controllers
for Off Line and DC to DC converter applications. The
internal circuits include UVLO, low start up current, tem-
perature compensated reference, high gain error ampli-
fier, current sensing comparator, and high current totem
pole output for driving a POWER MOSFET. Also
KA3842AC/KA3842AE provides low start up current
below 0.3mA and short shutdown delay time, typically
100ns. The KA3842AC/KA3842AE has a UVLO thresh-
old of 16V(on) and 10V(off). The KA3842AC/KA3842AE
can operate within a 100% duty cycle.
Yes
Package
8-DIP
8-DIP
1
Packing Method
Tube
www.fairchildsemi.com
March 2006

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KA3842AC_06 Summary of contents

Page 1

KA3842AC/KA3842AE SMPS Controller Features Low start current 0.2mA (Typ.) Operating range up to 500kHz Cycle by cycle current limiting Under Voltage Lock Out (UVLO) with hysteresis Short shutdown delay time: Typ.100ns High current totem-pole output Output swing limiting: 22V Ordering ...

Page 2

Internal Block Diagram 8 V REF Internal Bias 1/2 V REF COMP 3 C KA3842AC/KA3842AE Rev. 1.0.1 5V SET/ V RESET REF UVLO Good LOGIC C.S PWM Error Amp Comp. LATCH ...

Page 3

Absolute Maximum Ratings The “Absolute Maximum Ratings” are those values beyond which the safety of the device cannot be guaranteed. The device should not be operated at these limits. The parametric values defined in the Electrical Characteristics tables are not ...

Page 4

Electrical Characteristics (V = 15V 10k¾ 3.3nF Symbol Parameter OUTPUT SECTION V Output Low Level OL V Output High Level OH (1) t Rise Time R (1) t Fall Time F V ...

Page 5

Package Dimensions 8-Pin DIP KA3842AC/KA3842AE Rev. 1.0.1 Dimensions in millimeters 5 www.fairchildsemi.com ...

Page 6

TRADEMARKS The following are registered and unregistered trademarks Fairchild Semiconductor owns or is authorized to use and is not intended exhaustive list of all such trademarks. ® ACEx™ FAST ActiveArray™ FASTr™ Bottomless™ FPS™ Build it Now™ FRFET™ ...

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