Unisonic Technologies UC2843B
UC2843B is 8.4V (on) and 7.6V (off) and can operate to duty cycles approximately 100%. UNISONIC TECHNOLOGIES CO., LTD UC2843B LINEAR INTEGRATED CIRCUIT HIGH-PERFORMANCE CURRENT-MODE PWM CONTROLLERS DESCRIPTION The UTC UC2843B provides off-line or DC-DC fixed-frequency current-mode control design with minimum external components.| Part No. | UC2843B |
|---|---|
| Datasheet | UC2843B Download |
| Manufacturer |  Unisonic Technologies |
| Description | HIGH-PERFORMANCE CURRENT-MODE PWM CONTROLLERS |
| Buy | Stock & Price |
DESCRIPTION
The UTC UC2843B provides off-line or DC-DC fixed-frequency current-mode control design with minimum external components. Internally-implemented circuits include an under-voltage lockout (UVLO) and a precision reference with accuracy at the error amplifier input. The UTC UC2843B also contain internal circuits which include a pulse width modulation (PWM) comparator providing current-limit control, logic ensuring latched operation, and a totem-pole output stage designed to source or sink high-peak current. The output stage is low when it is in off-state condition and suitable for N-channel MOSFETs driving. The UTC UC2843B also has following advantages: the start-up current lower than 0.5mA while the oscillator discharge current is specified to 8.3mA (Typ.). In UVLO conditions, the output has a maximum saturation voltage of 1.2V when sinking 10mA @ VCC = 5V. The typical UVLO threshold of the UTC DIP-8 SOP-8●
FEATURES
* Current mode operation:500 kHz * Low start-up current valu...
