Texas Instruments UC1842J
The UC184x devices are specified for operation from –55°C to 125°C, the UC284x series is specified for operation from –40°C to 85°C, and the UC384x series is specified for operation from 0°C to 70°C.| Part No. | UC1842J |
|---|---|
| Datasheet | UC1842J Download |
| Manufacturer |  Texas Instruments |
| Description | Current-Mode PWM Controller |
| Buy | Stock & Price |
FEATURES
● 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 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 reference trimmed for accuracy at the error amplifier input. Other internal circuits include logic to ensure latched operation,...
