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KA3842 Datasheet (PDF) - Estek Electronics Co. Ltd

KA3842 Datasheet PDF - Estek Electronics Co. Ltd
Part # KA3842
Download  KA3842 Download

File Size   321.22 Kbytes
Page   7 Pages
Manufacturer  ESTEK [Estek Electronics Co. Ltd]
Direct Link  http://www.estek.com.cn/en/index.asp
Logo ESTEK - Estek Electronics Co. Ltd
Description fixed frequency current mode PWM controller

KA3842 Datasheet (PDF)

Go To PDF Page Download Datasheet
KA3842 Datasheet PDF - Estek Electronics Co. Ltd

Part # KA3842
Download  KA3842 Click to download

File Size   321.22 Kbytes
Page   7 Pages
Manufacturer  ESTEK [Estek Electronics Co. Ltd]
Direct Link  http://www.estek.com.cn/en/index.asp
Logo ESTEK - Estek Electronics Co. Ltd
Description fixed frequency current mode PWM controller

KA3842 Datasheet (HTML) - Estek Electronics Co. Ltd

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KA3842 Product details

Description

The 3842A(AM)/43A(AM)/44A(AM)/45A(AM) are fixed frequency current mode PWM controller. They are specially designed for OFF−Line and DC to DC converter applications with a minimal external components. Internally implemented circuits include 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 undervoltage lockout and current limiting. The 3842A(AM) and 3844A(AM) have UVLO thresholds of 16 V (on) and 10 V (off). The corresponding thresholds for the 3843A(AM)/45A(AM) are 8.4V (on) and 7.6V (off). The MIK3842A(AM) and MIK3843A(AM) can operate within 100% duty cycle. The 3844A(AM) and UC3845A(AM) can operate within 50% duty cycle. The 384XA(AM) has Start-Up Current 0.17mA (typ).



Features

• Low Start-Up and Operating Current

• High Current Totem Pole Output

• Undervoltage Lockout With Hysteresis

•Operating Frequency Up To 300KHz (384XA)

                                       500KHz (384XAM)



 




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