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UC2844 Datenblatt(PDF) 1 Page - Unisonic Technologies

Teilenummer UC2844
Bauteilbeschribung  HIGH PERFORMANCE CURRENT MODE PWM CONTROLLERS
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Hersteller  UTC [Unisonic Technologies]
Direct Link  http://www.utc-ic.com
Logo UTC - Unisonic Technologies

UC2844 Datenblatt(HTML) 1 Page - Unisonic Technologies

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UNISONIC TECHNOLOGIES CO., LTD
UC2844/45
LINEAR INTEGRATED CIRCUIT
www.unisonic.com.tw
1 of 7
Copyright © 2010 Unisonic Technologies Co., Ltd
QW-R103-051.A
HIGH PERFORMANCE
CURRENT MODE PWM
CONTROLLERS
DESCRIPTION
The UTC UC2844/2845 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 UC2844 and UC2845 are the maximum
duty cycle ranges and under-voltage lockout thresholds. The
UC2844
ideally suited to off-line applications with UVLO thresholds
of 16V(ON) and 10V(OFF), and UC2845 has UVLO thresholds of
8.5V(ON) and 7.6V(OFF) for lower voltage applications.
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
*Pb-free plating product number:
UC2844L/UC2845L
ORDERING INFORMATION
Order Number
Lead Free
Halogen Free
Package
Packing
UC2844L-S08-R
UC2844G-S08-R
SOP-8
Tape Reel
UC2845L-S08-R
UC2845G-S08-R
SOP-8
Tape Reel


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