1 Features

• AEC-Q100 qualified for automotive applications

– Device temperature grade 1: –40°C to +125°C

• Functional Safety-Compliant Targeted (Preview)

– Development targeted for functional safety

applications

– Documentation to aid ISO 26262 system design

• Overvoltage and undervoltage fault monitor for

400V & 800V BMS and DC-Link

– 1% overvoltage and undervoltage outputs

– Fast detection time (<5μs) to help minimize

system fault tolerant time interval

– 30V to 60V Low UV output

• Device flexibility to meet design requirements

– User selectable adjustable overvoltage and

undervoltage thresholds

– User programmable capacitor-based glitch

rejection and deassertion delay

• Integrated buffer for ADC monitoring

– High accuracy 0.35% (maximum) scaled down

voltage of sense pin

– VSENSE pin can directly drive high-speed ADC

inputs

• Designed for safety applications (Preview)

– Output latching feature to help bring system to

safe state

– Built-In Self-Test to monitor device functionality

and enhance system protection

2 Applications

• High-voltage battery system

• Traction inverter

• Integrated high voltage (OBC & DC/DC)

• DC/DC converter system

3 Description

TPS371K-Q1 is an automotive supervisor for

voltage monitoring with an integrated buffer for

400V and 800V DC-link voltage measurements.

The TPS371K-Q1 eliminates large resistor ladders

with the integrated high voltage ladder. This

device's SENSE pin can be directly connected to

400V or 800V automotive battery systems and

DC-Link for continuous monitoring of overvoltage

(OV), undervoltage (UV), and low undervoltage

(LUV) conditions. The TPS371K-Q1 offers CTS for

programmable glitch rejection for noisy environments.

The TPS371K-Q1 has a integrated high-speed buffer

VSENSE for supply voltage measurements. The

buffer has a low output impedance which can directly

drive ADC inputs. VSENSE is a scaled down voltage

of the SENSE pin input.

The combination of voltage supervisor and integrated

buffer allows for the smallest signal chain size for

direct monitoring of 400V and 800V systems. This

combination also allows for redundant digital and

analog always on voltage fault monitoring.

The TPS371K-Q1 is available in a 12.8mm × 7.4mm

SOIC 15-pin package. TPS371K-Q1 operates over

-40°C to +125°C TA.