The UCx84x series of control integrated circuits provide the features that are necessary to implement off-line or DC-to-DC fixed-frequency current-mode control schemes, with a minimum number of external components. The internally implemented circuits include an undervoltage lockout (UVLO), featuring a start-up current of less than 1 mA, and a precision refer.
• Optimized for off-line and DC-to-DC converters
• Low start-up current (< 1 mA)
• Automatic feedforward compensation
• Pulse-by-pulse current limiting
• Enhanced load-response characteristics
• Undervoltage lockout with hysteresis
• Double-pulse suppression
• High-current totem-pole output
• Internally trimmed bandgap reference
• Up to 500-kHz operation
• Error amplifier with low output resistance
2 Applications
• Switching regulators of any polarity
• Transformer-coupled DC-DC converters
3 Description
The UCx84x series of control integrated circuits provide the features that are necessary to.
No. | Partie # | Fabricant | Description | Fiche Technique |
---|---|---|---|---|
1 | UC1842 |
Texas Instruments |
Current-Mode PWM Controller | |
2 | UC1842A |
Texas Instruments |
Current-Mode PWM Controllers | |
3 | UC1842A |
Unitrode |
Current Mode PWM Controller | |
4 | UC1842A |
LINFINITY |
CURRENT MODE PWM CONTROLLER | |
5 | UC1842A-EP |
Texas Instruments |
Current-Mode PWM Controllers | |
6 | UC1842A-SP |
Texas Instruments |
current-mode PWM controller | |
7 | UC1842J |
Texas Instruments |
Current-Mode PWM Controller | |
8 | UC1842L |
Texas Instruments |
Current-Mode PWM Controller | |
9 | UC1840 |
STMicroelectronics |
PWM CONTROLLER | |
10 | UC1841 |
Unitrode |
Programmable Off-Line PWM Controller | |
11 | UC1843 |
Texas Instruments |
Current-Mode PWM Controllers | |
12 | UC1843-HIREL |
Texas Instruments |
current-mode PWM controller |