The UC3854A/B products are pin compatible enhanced versions of the UC3854. Like the UC3854, these products provide all of the functions necessary for active power factor corrected preregulators. The controller achieves near unity power factor by shaping the ac input line current waveform to correspond to the ac input line voltage. To do this the UC3854A/B us.
1
• Controls Boost PWM to Near-Unity Power Factor
• Limits Line Current Distortion To <3%
• World-Wide Operation Without Switches
• Accurate Power Limiting
• Fixed-Frequency Average Current-Mode
Control
• High Bandwidth (5 MHz), Low-Offset Current Amplifier
• Integrated Current- and Voltage-Amplifier Output Clamps
• Multiplier Improvements: Linearity, 500 mV VAC Offset (Eliminates External Resistor), 0 V to 5 V Multout Common-Mode Range
• VREF GOOD Comparator
• Faster and Improved Accuracy ENABLE
Comparator
• UVLO Options (16 V/10 V or 10.5 V/10 V)
• 300-µA Start-Up Supply Current
BLOCK DIAGR.
The UC1854A/B products are pin compatible enhanced versions of the UC1854. Like the UC1854, these products provide all o.
No. | Partie # | Fabricant | Description | Fiche Technique |
---|---|---|---|---|
1 | UC3854 |
Unisonic Technologies |
ENHANCED HIGH POWER FACTOR PREREGULATOR | |
2 | UC3854 |
Texas Instruments |
High-Power Factor Preregulator | |
3 | UC3854A |
UNITRODE |
Enhanced High Power Factor Preregulator | |
4 | UC3854A |
Texas Instruments |
ADVANCED HIGH-POWER FACTOR PREREGULATOR | |
5 | UC385-1 |
Texas Instruments |
Fast Transient Response 5-A Low-Dropout Regulator | |
6 | UC385-2 |
Texas Instruments |
Fast Transient Response 5-A Low-Dropout Regulator | |
7 | UC385-3 |
Texas Instruments |
Fast Transient Response 5-A Low-Dropout Regulator | |
8 | UC385-ADJ |
Texas Instruments |
Fast Transient Response 5-A Low-Dropout Regulator | |
9 | UC3851 |
UNITRODE |
PWM Controller | |
10 | UC3852 |
UNITRODE |
High Power-Factor Preregulator | |
11 | UC3853 |
Unitrode |
High Power Factor Preregulator | |
12 | UC3853 |
UTC |
CURRENT MODE PWM CONTROLLER |