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Numéro de référence | UC3844 | ||
Description | (UC3844 / UC3845) HIGH PERFORMANCE CURRENT MODE PWM CONTROLLERS | ||
Fabricant | Unisonic Technologies | ||
Logo | |||
1 Page
UNISONIC TECHNOLOGIES CO., LTD
UC3844/45
LINEAR INTEGRATED CIRCUIT
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.
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
Halogen Free
UC3844L-D08-T
UC3844G-D08-T
UC3844L-S08-R
UC3844G-S08-R
UC3844L-S08-T
UC3844G-S08-T
UC3845L-D08-T
UC3845G-D08-T
UC3845L-S08-R
UC3845G-S08-R
UC3845L-S08-T
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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Pages | Pages 6 | ||
Télécharger | [ UC3844 ] |
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