STEF12H60MPUR STMicroelectronics

STEF12H60M Datasheet 60 A electronic fuse for 12 V DC rail Features 60 A continuous current Input voltage range from 5 to 18 V Adjustable current limit Input undervoltage lockout Integrated 0.85 m Power MOSFET Enable/Disable pin Programmable turn-on time Accurate current monitor signal Precise temperature monitor Overcurrent and Fault status flags Internal MOSFET self-diagnostic Parallel operation Thermal protection Fault management: latch-off or auto-retry versions QFN32- 5 x 5 package Temperature range: -40C to 125C Applications Server main eFuse Hot-swap boards Maturity status link High power industrial 12 V rail protection STEF12H60M Description The STEF12H60M is a 60 A integrated electronic fuse optimized for monitoring the output current and the input voltage, over the 12 V DC power lines. When connected in series to the main power rail, it is able to detect and react to overcurrent conditions. When an overload condition occurs, the device limits the output current to a safe value defined by the user. A precise current monitor signal provides continuous information about the load current to the system controller IC. Similarly, a precise temperature sensor generates a monitor signal that permits the system controller to keep the device power dissipation under control. Turn-on time is programmable, which helps control the inrush current during start-up operations. Multiple devices can work in parallel and smoothly share the current during the start-up phase, thanks to a dedicated current balancing feature. The device also embeds the undervoltage lockout feature, self-diagnostic and absolute thermal protection. DS13608 - Rev 3 - May 2021 www.st.com For further information contact your local STMicroelectronics sales office.STEF12H60M Diagram 1 Diagram Figure 1. Block diagram V Gate DD V INF V DD Charge 5 V LDO 3.0 V pump V IN 5mA SS error amp. Copy 1 Copy 2 Voltage Power 1 : 10000 1 : 10000 Monitoring SS circuit OUT I comparator SHORT R1 3.0V R2 RSense 10mA I OUT GND I error amp. LIM V OUT Overcurrent timer CLREF I MON Current sensor I MON and I current monitor CS Logic CS Safe startup And current limit Reference circuit GND OUT pull-down UVLO detector V 4.3V GND DD D OC comparator D OC D OC n 85%CLREF 3.0V GND G DCH PD 5mA ON comparator UVLO GOK G OK n ON/PD V 1.4V DD Core logic GND OFF comparator 3.7V ON OFF Thermal prot. 1.2V Temperature monitoring PD OFF PD comparator V TEMP 0.8V 50mA GND GND GND DS13608 - Rev 3 page 2/34 Gate discharge GATE monitoring 5.4V V Ref. g Short cir.