Packaging information
| Package | Pins SOIC (D) | 8 |
| Operating temperature range (°C) 0 to 70 |
| Package qty | Carrier 2,500 | LARGE T&R |
Features for the TL3843
- Optimized for off-line and DC-to-DC converters
- Low start-up current (< 1mA)
- Automatic feed-forward 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
- 500kHz operation
- Error amplifier with low output resistance
- Designed to be interchangeable with UC2842 and UC3842 series
Description for the TL3843
The TL284x and TL384x 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. Some of the internally implemented circuits are an undervoltage lockout (UVLO), featuring a start-up current of less than 1mA, and a precision reference trimmed for accuracy at the error amplifier input. Other internal circuits include logic to ensure latched operation, a pulse-width modulation (PWM) comparator (that also provides current-limit control), and a totem-pole output stage designed to source or sink high-peak current. The output stage, suitable for driving N-channel MOSFETs, is low when it is in the off state.