The UCC3809 family of BCDMOS economy low power integrated circuits contains all the control and drive circuitry required for off-line and isolated DC-to-DC fixed frequency current mode switching power supplies with minimal external parts count. Internally implemented circuits include undervoltage lockout featuring startup current less than 100uA, a user accessible voltage reference, logic to ensure latched operation, a PWM comparator, and a totem pole output stage to sink or source peak current. The output stage, suitable for driving N-Channel MOSFETs, is low in the off state.
Oscillator frequency and maximum duty cycle are programmed with two resistors and a capacitor. The UCC3809 family also features full cycle soft start.
| UCC2809-1 | UCC2809-2 | UCC3809-1 | UCC3809-2 | |
| Topology | Boost, Flyback, Forward | Boost, Flyback, Forward | Boost, Buck, Flyback, Forward | Boost, Buck, Flyback, Forward |
| Control Method | Current Mode | Current Mode | Current Mode | Current Mode |
| Duty Cycle(Max)(%) | 70 | 70 | 70 | 70 |
| Frequency(Max)(kHz) | 1000 | 1000 | 1000 | 1000 |
| UVLO Thresholds On/Off(V) | 10/8 | 15/8 | 10/8 | 15/8 |
| Pin/Package | 8MSOP, 8SOIC, 8TSSOP | 8MSOP, 8SOIC, 8TSSOP | 8MSOP, 8PDIP, 8SOIC, 8TSSOP | 8MSOP, 8PDIP, 8SOIC, 8TSSOP |
| Regulated Outputs(#) | 1 | 1 | 1 | 1 |
| Operating Temperature Range(°C) | -40 to 85 | -40 to 85 | 0 to 70 | 0 to 70 |
| Rating | Catalog | Catalog | Catalog | Catalog |
| 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 |
| UCC2809D-1 | ACTIVE | -40 to 85 | 1.10 | 1ku | SOIC (D) | 8 | 75 | TUBE | 2809-1 D-1 |
| UCC2809D-1G4 | ACTIVE | -40 to 85 | 1.10 | 1ku | SOIC (D) | 8 | 75 | TUBE | 2809-1 D-1 |
| UCC2809DTR-1 | ACTIVE | -40 to 85 | 1.15 | 1ku | SOIC (D) | 8 | 2500 | LARGE T&R | 2809-1 D-1 |
| UCC2809DTR-1G4 | ACTIVE | -40 to 85 | 1.15 | 1ku | SOIC (D) | 8 | 2500 | LARGE T&R | 2809-1 D-1 |
| UCC2809P-1 | ACTIVE | -40 to 85 | 1.10 | 1ku | MSOP (DGK) | 8 | 80 | TUBE | 28091 |
| UCC2809P-1G4 | ACTIVE | -40 to 85 | 1.10 | 1ku | MSOP (DGK) | 8 | 80 | TUBE | 28091 |
| UCC2809PTR-1 | ACTIVE | -40 to 85 | 1.00 | 1ku | MSOP (DGK) | 8 | 2500 | LARGE T&R | 28091 |
| UCC2809PTR-1G4 | ACTIVE | -40 to 85 | 1.00 | 1ku | MSOP (DGK) | 8 | 2500 | LARGE T&R | 28091 |
| UCC2809PW-1 | ACTIVE | -40 to 85 | 1.25 | 1ku | TSSOP (PW) | 8 | 150 | TUBE | 28091 |
| UCC2809PW-1G4 | ACTIVE | -40 to 85 | 1.25 | 1ku | TSSOP (PW) | 8 | 150 | TUBE | 28091 |
| UCC2809PWTR-1 | ACTIVE | -40 to 85 | 1.15 | 1ku | TSSOP (PW) | 8 | 2000 | LARGE T&R | 28091 |
| UCC2809PWTR-1G4 | ACTIVE | -40 to 85 | 1.15 | 1ku | TSSOP (PW) | 8 | 2000 | LARGE T&R | 28091 |
| 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 |
| UCC2809D-1 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | UCC2809D-1 | |
| UCC2809D-1G4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | UCC2809D-1G4 | UCC2809D-1G4 |
| UCC2809DTR-1 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | UCC2809DTR-1 | |
| UCC2809DTR-1G4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | UCC2809DTR-1G4 | UCC2809DTR-1G4 |
| UCC2809P-1 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-2-260C-1 YEAR | UCC2809P-1 | |
| UCC2809P-1G4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-2-260C-1 YEAR | UCC2809P-1G4 | UCC2809P-1G4 |
| UCC2809PTR-1 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-2-260C-1 YEAR | UCC2809PTR-1 | |
| UCC2809PTR-1G4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-2-260C-1 YEAR | UCC2809PTR-1G4 | UCC2809PTR-1G4 |
| UCC2809PW-1 | Green (RoHS & no Sb/Br) | Call TI | Level-2-260C-1 YEAR | UCC2809PW-1 | |
| UCC2809PW-1G4 | Green (RoHS & no Sb/Br) | Call TI | Level-2-260C-1 YEAR | UCC2809PW-1G4 | UCC2809PW-1G4 |
| UCC2809PWTR-1 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-2-260C-1 YEAR | UCC2809PWTR-1 | |
| UCC2809PWTR-1G4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-2-260C-1 YEAR | UCC2809PWTR-1G4 | UCC2809PWTR-1G4 |
| 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 |
| 用于音频转换器的软件驱动程序 | CODECDRIVERS-SW | Texas Instruments | 应用软件 |