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.
TheUC3842/3/4/5family of controlICs provides the necessary features to implement off-line or DC to DC fixed frequency cu.
No. | Partie # | Fabricant | Description | Fiche Technique |
---|---|---|---|---|
1 | UC2840 |
Unitrode |
PWM Controller | |
2 | UC2840 |
ST Microelectronics |
PWM Controller | |
3 | UC2841 |
Unitrode |
Programmable Off-Line PWM Controller | |
4 | UC2842 |
ST Microelectronics |
(UC2843 / UC2844 / UC2845) CURRENTMODE PWM CONTROLLER | |
5 | UC2842 |
Texas Instruments |
Current-Mode PWM Controllers | |
6 | UC2842A |
Motorola |
(UC2842A / UC2843A) HIGH PERFORMANCE CURRENT MODE CONTROLLERS | |
7 | UC2842A |
ST Microelectronics |
(UC2842A - UC2845A) HIGH PERFORMANCE CURRENT MODE PWM CONTROLLER | |
8 | UC2842A |
LINFINITY |
CURRENT MODE PWM CONTROLLER | |
9 | UC2842A |
UTC |
PWM CONTROLLERS | |
10 | UC2842A |
ON Semiconductor |
High Performance Current Controller | |
11 | UC2842A |
Texas Instruments |
Current-Mode PWM Controllers | |
12 | UC2842A |
Unitrode |
Current Mode PWM Controller |