低功耗 BiCMOS 電流模式 PWM
| Topology | Boost, Flyback, Forward |
| Duty cycle (Max) (%) | 50 |
| Vin (Max) (V) | 12 |
| UVLO thresholds on/off (V) | 4.1/3.6 |
| Features | Error Amplifier, Leading Edge Blanking, Soft Start |
| Operating temperature range (C) | -55 to 125 |
| Switching frequency (Max) (kHz) | 1000 |
| Rating | Military |
| Gate drive (Typ) (A) | 1 |
- 100-μA typical starting supply current
- 500-μA typical operating supply current
- Operation up to 1 MHz
- Internal soft start
- Internal fault soft start
- Internal leading-edge blanking of the current sense signal
- 1-A totem-pole output
- 70-ns typical response from current-sense to gate drive output
- 1.5% tolerance voltage reference
- Same pinout as UC3842 and UC3842A
The UCC280x family of high-speed, low-power integrated circuits contain all of the control and drive components required for off-line and DC-to-DC fixed frequency current-mode switching mode power supplies with minimal parts count.
These devices have the same pin configuration as the UCx84x family, and also offer the added features of internal full-cycle soft start and internal leading-edge blanking of the current-sense input.
