Datasheet VNF1048F (STMicroelectronics)

VNF1048F
Datasheet High-side switch Controller with intelligent fuse protection for 12 V, 24 V and 48 V automotive applications
Features
Max transient supply voltage VS 70 V Operating voltage range VS 6 V to 60 V Operating voltage range (extended) VS 6 V to 70 V Standby current (max) IS_Q 70 µA SPI I/O supply voltage VSPI 3 V to 5.5 V SPI standby current (max) I_STBY 5 µA QFN32L 5x5 • AEC-Q100 automotive qualified • General – High side switch Control IC with e-fuse protection for Automotive 12 V, 24 V and 48 V applications – SPI slave interface for host control – 32-bit ST-SPI interface compatible with 3.3 V and 5 V CMOS level – 2 stage charge pump – Gate drive for an external MOSFET in high side configuration – High precision uni-directional digital current sense via SPI through an external high side shunt resistor – Input for a NTC resistor to monitor the external MOSFET temperature – Very low standby current
Product status link
– Robust fail-safe functionality through internal and external controls VNF1048F – SPI register lock-out by a dedicate digital input pin – Integrated ADC for TJ, VNTC, VOUT and VDS conversion
Product summary
• Protections
Order code
VNF1048FTR – Battery under-voltage shut-down
Package
QFN32L – External MOSFET desaturation shutdown configurable via SPI
Packing
Tape and reel – Hard short circuit latch-off configurable via SPI – Current vs time latch-off configurable via SPI (fuse-emulation) – Device overtemperature shutdown – External MOSFET overtemperature shutdown • Intelligent high current fuse replacement for automotive applications • Especially intended for automotive power distribution applications
Description
The device is an advanced controller for a power MOSFET in high side configuration, designed for the implementation of an Intelligent High Side Switch for 12 V, 24 V and 48 V automotive applications. The Control IC is interfaced to a host microcontroller through a 3.3 V and 5 V CMOS-compatible SPI interface and provides protection and diagnostics to the system.
DS13084
-
Rev 6
-
May 2022
www.st.com For further information contact your local STMicroelectronics sales office. Document Outline 1 Block diagram and pin description 2 Electrical specification 2.1 Absolute maximum ratings 2.2 Thermal data 2.3 Main electrical characteristics 3 eFuse function 4 Self Test 4.1 Current Sense Self Test 4.2 External FET VDS Detection Self Test 4.3 External FET Stuck-on Self Test 5 Protections 5.1 Battery undervoltage shutdown 5.2 Device overtemperature shutdown 5.3 External MOSFET overtemperature shutdown 5.4 External MOSFET desaturation shut-down 5.5 Hard short circuit latch-off 5.6 Current vs time latch-off 5.7 Low Current Bypass desaturation shut-down 6 SPI functional description 6.1 SPI Communication 6.2 Signal description 6.3 SPI protocol 6.4 Operating code definition 6.5 Write mode 6.6 Read mode 6.7 Read and clear status command 6.8 SPI device information 6.9 Special commands 6.10 Global status byte 6.11 Address map 6.12 ROM memory map 6.13 Control registers 6.14 Status registers 6.15 Timeout watchdog 7 Operating modes 7.1 State Diagram 7.2 PowerON mode 7.3 Stand-by mode 7.4 WakeUp mode 7.5 Unlocked mode 7.6 Locked mode 7.7 Self-test mode 8 Application information 9 Package information 9.1 QFN32L 5x5 package information Revision history