The UC1846/7 family of control ICs provides all of the necessary features to implement fixed frequency, current mode control schemes while maintaining a minimum external parts count. The superior performance of this technique can be measured in improved line regulation, enhanced load response characteristics, and a simpler, easier-to-design control loop. Topological advantages include inherent pulse-by-pulse current limiting capability, automatic symmetry correction for push-pull converters, and the ability to parallel "power modules" while maintaining equal current sharing.
Protection circuitry includes built-in under-voltage lockout and programmable current limit in addition to soft start capability. A shut-down function is also available which can in
| UC1846 | UC2846 | UC3846 | |
| Topology | Boost, Flyback, Forward, Full-Bridge, Half-Bridge, Push-Pull | Boost, Flyback, Forward, Full-Bridge, Half-Bridge, Push-Pull | Boost, Buck, Flyback, Forward, Full-Bridge, Half-Bridge, Push-Pull |
| Control Method | Current Mode | Current Mode | Current Mode |
| Duty Cycle(Max)(%) | 50 | 50 | 50 |
| Frequency(Max)(kHz) | 450 | 450 | 450 |
| UVLO Thresholds On/Off(V) | 7.7/6.95 | 7.7/6.95 | 7.7/6.95 |
| Pin/Package | 16CDIP, 20LCCC | 16PDIP, 16SOIC, 20PLCC | 16PDIP, 16SOIC, 20PLCC |
| Regulated Outputs(#) | 2 | 2 | 2 |
| Operating Temperature Range(°C) | -55 to 125 | -40 to 85 | 0 to 70 |
| Rating | Military | Catalog | Catalog |
itiate either a complete shutdown with automatic restart or latch the supply off.
| 器件 | 状态 | 温度 (oC) | 价格（美元） | 封装 | 引脚 | 封装数量 | 封装载体 | 丝印标记 |
| UC3846DW | ACTIVE | 0 to 70 | 1.75 | 1ku | SOIC (DW) | 16 | 40 | TUBE | UC3846DW |
| UC3846DWG4 | ACTIVE | 0 to 70 | 1.75 | 1ku | SOIC (DW) | 16 | 40 | TUBE | UC3846DW |
| UC3846DWTR | ACTIVE | 0 to 70 | 1.70 | 1ku | SOIC (DW) | 16 | 2000 | LARGE T&R | UC3846DW |
| UC3846DWTRG4 | ACTIVE | 0 to 70 | 1.70 | 1ku | SOIC (DW) | 16 | 2000 | LARGE T&R | UC3846DW |
| UC3846N | ACTIVE | 0 to 70 | 1.75 | 1ku | PDIP (N) | 16 | 25 | TUBE | UC3846N |
| UC3846NG4 | ACTIVE | 0 to 70 | 1.75 | 1ku | PDIP (N) | 16 | 25 | TUBE | UC3846N |
| UC3846Q | ACTIVE | 0 to 70 | 2.10 | 1ku | PLCC (FN) | 20 | 46 | TUBE | UC3846Q |
| UC3846QG3 | ACTIVE | 0 to 70 | 2.10 | 1ku | PLCC (FN) | 20 | 46 | TUBE | UC3846Q |
| UC3846QTR | ACTIVE | 0 to 70 | 1.70 | 1ku | PLCC (FN) | 20 | 1000 | LARGE T&R | UC3846Q |
| UC3846QTRG3 | ACTIVE | 0 to 70 | 1.70 | 1ku | PLCC (FN) | 20 | 1000 | LARGE T&R | UC3846Q |
| 器件 | 环保计划* | 铅/焊球涂层 | MSL 等级/回流焊峰 | 环保信息与无铅 (Pb-free) | DPPM / MTBF / FIT 率 |
| UC3846DW | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-2-260C-1 YEAR | UC3846DW | |
| UC3846DWG4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-2-260C-1 YEAR | UC3846DWG4 | UC3846DWG4 |
| UC3846DWTR | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-2-260C-1 YEAR | UC3846DWTR | |
| UC3846DWTRG4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-2-260C-1 YEAR | UC3846DWTRG4 | UC3846DWTRG4 |
| UC3846N | Green (RoHS & no Sb/Br) | CU NIPDAU | N/A for Pkg Type | UC3846N | |
| UC3846NG4 | Green (RoHS & no Sb/Br) | CU NIPDAU | N/A for Pkg Type | UC3846NG4 | UC3846NG4 |
| UC3846Q | Green (RoHS & no Sb/Br) | CU SN | Level-2-260C-1 YEAR | UC3846Q | |
| UC3846QG3 | Green (RoHS & no Sb/Br) | CU SN | Level-2-260C-1 YEAR | UC3846QG3 | |
| UC3846QTR | Green (RoHS & no Sb/Br) | CU SN | Level-2-260C-1 YEAR | UC3846QTR | |
| UC3846QTRG3 | Green (RoHS & no Sb/Br) | CU SN | Level-2-260C-1 YEAR | UC3846QTRG3 |
| 名称 | 型号 | 公司 | 工具/软件类型 |
| 音频的快速搜索选择工具 | AUDIO_SELECTION_TOOL | Texas Instruments | 免费评估工具 |
| UC3846 评估模块 | UC3846EVM | Texas Instruments | 开发电路板/EVM |
| 用于音频转换器的软件驱动程序 | CODECDRIVERS-SW | Texas Instruments | 应用软件 |