UNISONIC TECHNOLOGIES CO., LTD
UC3846
LINEAR INTEGRATED CIRCUIT
CURRENT MODE PWM
CONTROLLER
DIP-16
DESCRIPTION
The UTC UC3846 control IC offers all necessary features for
accomplishment of fixed frequency, current mode control functions,
however it contains the least external parts. The performance of this
technique is superior to the others in better line regulation,
enhanced load response characteristics while designing a simpler
and easier control loop for design. It owns topological advantages of
inherent pulse-by-pulse current limiting, automatic symmetry
correction for push-pull converters, and the ability to parallel “power
modules" for equal current sharing.
SOP-16
SOP-16W
Protection loop includes soft start, built-in under-voltage lockout
and programmable current limit. The shutdown circuitry can
provide either a complete shutdown with automatic restart or the
supply off-latch.
In addition, many other features can also be available, including
fully latched operation, double pulse suppression, deadline adjust,
and a ±1% trimmed bandgap reference.
The UTC UC3846 features low outputs in the OFF state.
FEATURES
* Built-in under-voltage lockout
* Soft start
* Shutdown function
* Improved load response characteristics
* Parallel operation capability for modular power systems
* Differential current sense amplifier with wide common mode
range
* 500kHZ operation
* Feed forward compensation
* ±1% bandgap reference
* Programmable pulse-by-pulse current limiting
* Double pulse suppression
* 500mA (Peak) totem-pole outputs
* Automatic symmetry correction in push-pull configuration
ORDERING INFORMATION
Ordering Number
Lead Free
Package
Packing
Halogen Free
UC3846L-D16-T
UC3846L-S16-T
UC3846L-S16-R
UC3846L-S16W-T
UC3846L-S16W-R
UC3846G-D16-T
UC3846G-S16-T
UC3846G-S16-R
UC3846G-S16W-T
UC3846G-S16W-R
DIP-16
SOP-16
Tube
Tube
SOP-16
Tape Reel
Tube
SOP-16W
SOP-16W
Tape Reel
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