電流模式 PWM 控制器
| Topology | Boost, Flyback, Forward |
| Duty cycle (Max) (%) | 100 |
| Vin (Max) (V) | 30 |
| UVLO thresholds on/off (V) | 8.4/7.6 |
| Features | Error Amplifier, Multi-topology |
| Operating temperature range (C) | -55 to 125 |
| Switching frequency (Max) (kHz) | 500 |
| Rating | Military |
| Gate drive (Typ) (A) | 1 |
The UC1843 family of control devices provides the necessary features to implement off-line or dc-to-dc fixed frequency current mode control schemes with a minimal external parts count. Internally implemented circuits include under-voltage lockout featuring start up current less than 1 mA, a precision reference trimmed for accuracy at the error amp input, logic to insure latched operation, a PWM comparator which 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 in the off state. The under-voltage lockout threshold is 8.4 V and maximum duty cycle range is around 100%.
