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UC3844_45

Description
HIGH PERFORMANCE CURRENT MODE PWM CONTROLLERS
File Size337KB,6 Pages
ManufacturerETL [E-Tech Electronics LTD]
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UC3844_45 Overview

HIGH PERFORMANCE CURRENT MODE PWM CONTROLLERS

UNISONIC TECHNOLOGIES CO., LTD
UC3844/45
HIGH PERFORMANCE
CURRENT MODE PWM
CONTROLLERS
DESCRIPTION
The UTC
UC3844/3845
are high performance fixed frequency
current mode controllers that specifically designed for Off-Line and
DC to DC converter applications with minimal external parts count.
The differences between
UC3844
and
UC3845
are the maximum
duty cycle ranges and under-voltage lockout thresholds. The
UC3844
ideally suited to off-line applications with UVLO thresholds
of 16V
(ON)
and 10V
(OFF)
, and
UC3845
has UVLO thresholds of
8.5V
(ON)
and 7.6V
(OFF)
for lower voltage applications.
LINEAR INTEGRATED CIRCUIT
FEATURES
* Operation output switching frequency up to 500 kHz
* Output deadtime adjustable from 50% to 70%
* Automatic feed forward compensation
* Latching PWM for cycle-by-cycle current limiting
* High current totem pole output
* Internally trimmed reference with under voltage lockout
* UVLO with hysteresis
* Low startup and operating current
ORDERING INFORMATION
Ordering Number
Lead Free
UC3844L-D08-T
UC3844L-S08-R
UC3844L-S08-T
UC3845L-D08-T
UC3845L-S08-R
UC3845L-S08-T
Halogen Free
UC3844G-D08-T
UC3844G-S08-R
UC3844G-S08-T
UC3845G-D08-T
UC3845G-S08-R
UC3845G-S08-T
Package
DIP-8
SOP-8
SOP-8
DIP-8
SOP-8
SOP-8
Packing
Tube
Tape Reel
Tube
Tube
Tape Reel
Tube
www.unisonic.com.tw
Copyright © 2012 Unisonic Technologies Co., Ltd
1 of 6
QW-R103-010.E

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Description HIGH PERFORMANCE CURRENT MODE PWM CONTROLLERS HIGH PERFORMANCE CURRENT MODE PWM CONTROLLERS HIGH PERFORMANCE CURRENT MODE PWM CONTROLLERS HIGH PERFORMANCE CURRENT MODE PWM CONTROLLERS HIGH PERFORMANCE CURRENT MODE PWM CONTROLLERS HIGH PERFORMANCE CURRENT MODE PWM CONTROLLERS HIGH PERFORMANCE CURRENT MODE PWM CONTROLLERS
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