(Hong Kong)
Product Summary
The UC3842AN is a high performance current mode controller. It is specifically designed for off-line and DC-to-DC converter applications offering the designer a cost effective solution with minimal external components.These integrated circuits feature a trimmed oscillator for precise duty cycle control, a temperature compensated reference, high gain error amplifier, current sensing comparator, and a high current totem pole output ideally suited for driving a power MOSFET.; (2)Also included are protective features consisting of input and reference undervoltage lockouts each with hysteresis, cycle-by-cycle current limiting, programmable output deadtime, and a latch for singlenpulse metering.; (3)These devices are available in an 8-pin dual-in-line plastic package as well as the 14-pin plastic surface mount (SOIC14). The SOIC14 package has separate power and ground pins for the totem pole output stage.
Parametrics
UC3842AN absolute maximum ratings: (1)total power supply and zener current: 30mA; (2)output current: 1A; (3)current sense and voltage feedback inputs: -0.3 to 5.5V; (4)error amp output sink current: 10mA; (5)power dissipation: 862mW.
Features
UC3842AN features: (1)Trimmed Oscillator Discharge Current for Precise Duty Cycle Control; (2)Current Mode Operation to 500 kHz; (3)Automatic Feed Forward Compensation; (4)Latching PWM for Cycle-By-Cycle Current Limiting; (5)Internally Trimmed Reference with Undervoltage Lockout; (6)High Current Totem Pole Output; (7)Undervoltage Lockout with Hysteresis; (8)Low Startup and Operating Current; (9)Direct Interface with ON Semiconductor SENSEFET? Products; (10)Pb?Free Packages are Available.
Diagrams
| Image | Part No | Mfg | Description |  |
Pricing (USD) |
Quantity | ||||||||||||
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 UC3842AN |
Texas Instruments |
Current Mode PWM Controllers Current Mode |
Data Sheet |
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UC3842AN2 |
ON Semiconductor |
Other Power Management 52kHz 1A Current PWM |
Data Sheet |
Negotiable |
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UC3842AN2G |
ON Semiconductor |
Other Power Management 52kHz 1A Current PWM w/96% Duty Cycle Max |
Data Sheet |
Negotiable |
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UC3842ANG |
ON Semiconductor |
Other Power Management 52kHz 1A Current PWM w/96% Duty Cycle Max |
Data Sheet |
Negotiable |
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UC3842ANG4 |
Texas Instruments |
Current Mode PWM Controllers Current-Mode PWM Controller |
Data Sheet |
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