SG3846

CURRENT MODE PWM CONTROLLER

DESCRIPTION TheSG1846familyofcontrolICsprovidesallofthenecessaryfeaturestoimplementfixedfrequency,currentmodecontrolschemeswhilemaintainingaminimumexternalpartscount.Thesuperiorperformanceofthistechniquecanbemeasuredinimprovedlineregulation,enhancedloadre

SG3846

PWM Controller, Current Mode PWM, Dual Sink/SourceOutputs, 8-40V -55°C to 125°C; Automatic Feed-forward Compensation\nProgrammable Pulse by Pulse Current Limiting\nAutomatic Symmetry Correction in Push-pull Configuration\nEnhanced Load Response Characteristics\nParallel Operation Capability for Modular Power Systems\nDifferential Current Sense Amplifier with Wide Common-mode Range - Double Pulse Suppression\n200mA Totem-pole Outputs\n± 1% Bandgap Reference\nUnder-voltage Lockout\nSoft-start and Shutdown Capability\n500kHz Operation;

The SG1846 family of control ICs provides the required features to implement Fixed Frequency, Current mode control schemes while maintaining a minimum external parts count. The advanced performance of this technique can be measured in improved line regulation, enhanced load response characteristics, and a simpler, easier-to-design control loop. Topological advantages include, inherent pulse-by-pulse current limiting capability, automatic symmetry correction for push-pull converters, and the ability to parallel “power modules” while maintaining equal current sharing.Protection circuitry includes built-in under-voltage lockout and programmable current limit in addition to soft start capability. A shutdown function is also available which can initiate either a complete shutdown with automatic restart, or latch the supply off.Other features include fully latched operation, double-pulse suppression, dead-time adjust capability, and a ±1% trimmed bandgap reference.

SG3846

CURRENT MODE PWM CONTROLLER

SG3846DW

CURRENT MODE PWM CONTROLLER

DESCRIPTION TheSG1846familyofcontrolICsprovidesallofthenecessaryfeaturestoimplementfixedfrequency,currentmodecontrolschemeswhilemaintainingaminimumexternalpartscount.Thesuperiorperformanceofthistechniquecanbemeasuredinimprovedlineregulation,enhancedloadre

SG3846DW

Flyback, Forward and Isolated;

Key Features:• Automatic feed forward compensation• Programmable pulse by pulse current limiting• Automatic symmetry correction in push-pullconfiguration• Enhanced load response characteristics• Parallel operation capability for modular powersystems• Differential current sense amplifier with widecommon mode range• Double pulse suppression• 200mA totem-pole outputs• ± 1% bandgap reference• Under-voltage lockout• Soft-start capability• Shutdown capability• 500KHz operationThe SG1846 family of control ICs provides all of the necessary features to implement fixed frequency, current mode control schemes while maintaining a minimum external parts count. The superior performance of this technique can be measured in im-proved line regulation, enhanced load response characteristics, and a simpler, easier-to-design control loop. Topological advantages include inherent pulse-by-pulse current limiting capability, automatic symmetry correction for push-pull converters, and the ability to parallel “power modules” while maintaining equal current sharing.Protection circuitry includes built-in under-voltage lockout and programmable current limit in addition to soft start capability. A shutdown function is also available which can initiate either a complete shutdown with automatic restart or latch the supply off.Other features include fully latched operation, double pulse sup-pression, deadtime adjust capability, and a ±1% trimmed bandgap reference.

SG3846J

CURRENT MODE PWM CONTROLLER

DESCRIPTION TheSG1846familyofcontrolICsprovidesallofthenecessaryfeaturestoimplementfixedfrequency,currentmodecontrolschemeswhilemaintainingaminimumexternalpartscount.Thesuperiorperformanceofthistechniquecanbemeasuredinimprovedlineregulation,enhancedloadre

SG3846N

CURRENT MODE PWM CONTROLLER

DESCRIPTION TheSG1846familyofcontrolICsprovidesallofthenecessaryfeaturestoimplementfixedfrequency,currentmodecontrolschemeswhilemaintainingaminimumexternalpartscount.Thesuperiorperformanceofthistechniquecanbemeasuredinimprovedlineregulation,enhancedloadre

SG3846DW

CURRENT MODE PWM CONTROLLER

SG3846J

CURRENT MODE PWM CONTROLLER

SG3846N

CURRENT MODE PWM CONTROLLER