经济型初级侧控制器
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 100µA, 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.
The family has UVLO thresholds and hysteresis levels for off-line and DC-to-DC systems as shown in the table to the left.
The UCC3809 and the UCC2809 are offered in the 8 pin SOIC D, PDIP N, TSSOP PW, and MSOP P packages. The small TSSOP and MSOP packages make the device ideal for applications where board space and height are at a premium.
型号 | 品牌 | 下载 |
---|---|---|
UCC2809-2 | TI 德州仪器 | 下载 |
UCC28019 | TI 德州仪器 | 下载 |
UCC28221D | TI 德州仪器 | 下载 |
UCC28600EVM-65W | TI 德州仪器 | 下载 |
UCC28720EVM-212 | TI 德州仪器 | 下载 |
UCC28230PW | TI 德州仪器 | 下载 |
UCC28950EVM-442 | TI 德州仪器 | 下载 |
UCC29910AEVM-730 | TI 德州仪器 | 下载 |
UCC28019DG4 | TI 德州仪器 | 下载 |
UCC28060EVM | TI 德州仪器 | 下载 |
UCC2804DTR | TI 德州仪器 | 下载 |