UC1843A by Microchip Technology

PWM Controller flyback or forward - Low start-up current (0.5mA max.) 500KHz op

Control ICs provides all the necessary features to implement off-line fixed-frequency, current-mode switching power supplies with a minimum of external components. The current mode architecture demonstrates improved load regulation, pulse-by- pulse current limiting and inherent protection of the power supply output switch

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Optimized For Off-Line Control
Low Start-Up Current (<1mA)
Automatic Feed Forward Compensation
Trimmed Oscillator Discharge Current
Pulse-By-Pulse Current Limiting
Enhanced Load Response Characteristics -
Double-Pulse Suppression
High-Current Totem-Pole Output (1A Peak)
Internally Trimmed Band-gap Reference
500kHz Operation Under-voltage Lockout: SG1843 - 8.4 volts
Low Shoot-Through Current <75mA Over Temperature


Regulator Type HI Rel Switching Regulators
Configuration Current Mode PWMs

Featured content from Future

UC1843A Analog and Mixed-Signal by Texas Instruments

Current Mode PWM Controller 8-CDIP -55 to 125
Status: ACTIVE
Series: -
RoHS: Unknown
View Datasheet Manufacturer Site View Pricing & Stock


Features Error Amplifier,Multi-topology
Package size mm2:W x L (PKG) : See datasheet (CDIP),[pf]20LCCC[/pf]: 79 mm2: 8.89 x 8.89 (LCCC|20)
UVLO thresholds on/off(V) 8.4/7.6
Rating Military
Duty cycle(Max)(%) 100
Operating temperature range(C) -55 to 125
Control method Current
Topology Boost,Flyback,Forward
Frequency(Max)(kHz) 500
Package Group CDIP|8,LCCC|20
Gate drive(Typ)(A) 1

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This part has not been flagged as RoHS Compliant.

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