Gehäuseinformationen
| Gehäuse | Pins SOIC (D) | 8 |
| Betriebstemperaturbereich (°C) 0 to 70 |
| Gehäusemenge | Träger 75 | TUBE |
Merkmale von 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
Beschreibung von 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.