Texas Instruments has introduced its smallest bidirectional 18-V, 5-A protection switches with high power efficiency. These tiny devices reduce solution size and extend battery life in portable and adapter-powered devices, and enterprise and client solid state drives (SSDs).
Enterprise SSDs are reading and writing more data than ever before, which is driving a requirement for increased speed and reliability in smaller form factors. TI’s TPS25940 and TPS25942 integrated circuits include back-to-back FETs to provide bidirectional current control, while reducing system size by 50% compared to discrete solutions. These smart eFuse ICs save board space by maintaining over/under voltage threshold accuracy of 2%, eliminating the need for a separate supply voltage supervisor chip.
The TPS25940 eFuse power switch integrates DevSleep mode, which enables hosts and devices to completely hibernate an SSD serial ATA (SATA) interface to reduce power consumption to less than 5mW. The TPS25942 eFuse power multiplex (MUX) integrates an enable block function which allows the system to select between non-ideal diode mode and ideal diode mode.