TPS272C45 是一款旨在满足工业控制系统要求的双通道智能高侧开关。低导通电阻(R DS(on) 为 45mΩ)可最大限度地降低器件功耗,实现 100mA 至 3A 的宽输出负载电流范围。该器件提供一个额外的低压电源(3.3V 至 5V)输入引脚,从而最大限度地降低空载功耗。该器件集成了多种保护功能,如热关断、输出钳位和过流限制。这些功能可在发生故障(如短路)时提高系统的稳健性。
TPS272C45 器件采用可调阈值电流限制电路,通过减小驱动大容性负载时的浪涌电流并尽可能降低过载电流,提高了系统的可靠性。该器件还可配置浪涌电流持续时间,可通过较高的电流驱动高浪涌电流负载(如灯)或快速为容性负载充电。该器件还可提供精确的负载电流检测,以提高负载诊断功能,从而更好地进行预测性维护。
TPS272C45 器件采用引脚间距为 0.5mm 的 24 引脚 5mm × 4mm 小型 QFN 无引线封装,从而最大限度地减小 PCB 尺寸。
| Number of channels | 2 |
| Operating voltage (max) (V) | 36 |
| Operating voltage (min) (V) | 6 |
| Ron (typ) (mΩ) | 45 |
| Imax (A) | 3 |
| Current limit (min) (A) | 0.7 |
| Current limit (max) (A) | 5.8 |
| Current limit type | Adjustable |
| TI functional safety category | Functional Safety-Capable |
| Current limit accuracy | +25/-25% |
| Current sense accuracy | +4/-4% @1A |
| FET | Internal |
| Features | Adjustable current limit, Current sense/monitor, Inductive load compatibility, Inrush current control, Short circuit protection, Thermal shutdown, Under voltage lock out |
| Operating temperature range (°C) | -40 to 125 |
| Function | Adjustable current limit, Current monitoring, Inductive load compatibility, Inrush current control, Short circuit protection, Thermal shutdown |
| Rating | Catalog |
| VQFN (RHF) | 24 | 20 mm² 5 x 4 |