The UCC35701/UCC35702 family of pulse width modulators is intended for isolated switching power supplies using primary side control. They can be used for both off-line applications and DC/DC converter designs such as in a distributed power system architecture or as a telecom power source.
The devices feature low startup current, allowing for efficient off-line starting, yet have sufficient output drive to switch power MOSFETs in excess of 500kHz.
Voltage feed forward compensation is operational over a 5:1 input range and provides fast and accurate response to input voltage changes over a 4:1 range. An accurate volt-second clamp and maximum duty cycle limit are also featured.
Fault protection is provided by pulse by pulse current limiting as well as the ability to latch off after a programmable number of repetitive faults has occurred.
| UCC25702 | UCC35702 | |
| Topology | Boost, Flyback, Forward | Boost, Buck |
| Control Method | Voltage Mode | Voltage Mode |
| Duty Cycle(Max)(%) | 99 | 99 |
| Frequency(Max)(kHz) | 700 | 700 |
| UVLO Thresholds On/Off(V) | 9.9/9.1 | 9.9/9.1 |
| Pin/Package | 14PDIP, 14SOIC, 14TSSOP | 14SOIC, 14PDIP, 14TSSOP |
| Regulated Outputs(#) | 1 | 1 |
| Operating Temperature Range(°C) | -40 to 85 | 0 to 70 |
| Rating | 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 |
| UCC25702D | ACTIVE | -40 to 85 | 3.40 | 1ku | SOIC (D) | 14 | 50 | TUBE | UCC25702D |
| UCC25702DG4 | ACTIVE | -40 to 85 | 3.40 | 1ku | SOIC (D) | 14 | 50 | TUBE | UCC25702D |
| UCC25702DTR | ACTIVE | -40 to 85 | 3.20 | 1ku | SOIC (D) | 14 | 2500 | LARGE T&R | UCC25702D |
| UCC25702DTRG4 | ACTIVE | -40 to 85 | 3.20 | 1ku | SOIC (D) | 14 | 2500 | LARGE T&R | UCC25702D |
| UCC25702N | ACTIVE | -40 to 85 | 4.30 | 1ku | PDIP (N) | 14 | 25 | TUBE | UCC25702N |
| UCC25702NG4 | ACTIVE | -40 to 85 | 4.30 | 1ku | PDIP (N) | 14 | 25 | TUBE | UCC25702N |
| UCC25702PW | ACTIVE | -40 to 85 | 4.05 | 1ku | TSSOP (PW) | 14 | 90 | TUBE | 25702 |
| UCC25702PWG4 | ACTIVE | -40 to 85 | 4.05 | 1ku | TSSOP (PW) | 14 | 90 | TUBE | 25702 |
| UCC25702PWTR | ACTIVE | -40 to 85 | 3.25 | 1ku | TSSOP (PW) | 14 | 2000 | LARGE T&R | 25702 |
| UCC25702PWTRG4 | ACTIVE | -40 to 85 | 3.25 | 1ku | TSSOP (PW) | 14 | 2000 | LARGE T&R | 25702 |
| 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 |
| UCC25702D | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | UCC25702D | |
| UCC25702DG4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | UCC25702DG4 | UCC25702DG4 |
| UCC25702DTR | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | UCC25702DTR | |
| UCC25702DTRG4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | UCC25702DTRG4 | UCC25702DTRG4 |
| UCC25702N | Green (RoHS & no Sb/Br) | CU NIPDAU | N/A for Pkg Type | UCC25702N | |
| UCC25702NG4 | Green (RoHS & no Sb/Br) | CU NIPDAU | N/A for Pkg Type | UCC25702NG4 | UCC25702NG4 |
| UCC25702PW | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-2-260C-1 YEAR | UCC25702PW | |
| UCC25702PWG4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-2-260C-1 YEAR | UCC25702PWG4 | UCC25702PWG4 |
| UCC25702PWTR | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-2-260C-1 YEAR | UCC25702PWTR | |
| UCC25702PWTRG4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-2-260C-1 YEAR | UCC25702PWTRG4 | UCC25702PWTRG4 |
| 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 |
| UCC25702 评估模块 | UCC25702EVM | 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 |