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UCx84xA系列控制器件是引脚兼容的UCx84x系列改进版本。该系列器件具有控制电流模式或开关模式电源的必要功能，具有许多改进的特性：启动电流小于0.5 mA，振荡器放电调整为8.3 mA，在UVLO期间，输出级可以下降对于V CC 超过5 V，小于1.2 V时至少10 mA。
所有商标均为他们各自的所有者。
| Topology |
| Control Method |
| Vin (Min) (V) |
| Vin (Max) (V) |
| Frequency (Max) (kHz) |
| UVLO Thresholds On/Off (V) |
| Duty Cycle (Max) (%) |
| Gate Drive (Typ) (A) |
| Features |
| Rating |
| Operating Temperature Range (C) |
| Pin/Package |
| UC3842A | UC3843A | UC3844A | UC3845A |
|---|---|---|---|
| Boost Buck Buck-Boost Flyback Forward | Boost Buck Flyback Forward | Boost Buck Buck-Boost Flyback Forward | Boost Buck Buck-Boost Flyback Forward |
| Peak Current Mode | Current | Peak Current Mode | Peak Current Mode |
| 16 | 7.6 | 16 | 8.4 |
| 30 | 30 | 30 | 30 |
| 500 | 500 | 500 | 500 |
| 16/10 | 8.4/7.6 | 16/10 | 8.4/7.6 |
| 100 | 100 | 50 | 50 |
| 1 | 1 | 1 | 1 |
| Adjustable Switching Frequency Current Limiting Dead Time Control Error Amplifier | Adjustable Switching Frequency Current Limiting Dead Time Control Error Amplifier Multi-topology | Adjustable Switching Frequency Current Limiting Dead Time Control Error Amplifier Multi-topology | Adjustable Switching Frequency Current Limiting Dead Time Control Error Amplifier Multi-topology |
| Catalog | Catalog | Catalog | Catalog |
| 0 to 70 | 0 to 70 | 0 to 70 | 0 to 70 |
| 14SOIC 16SOIC 8PDIP 8SOIC | 14SOIC 8PDIP 8SOIC | 14SOIC 8PDIP 8SOIC | 14SOIC 8PDIP 8SOIC |
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