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ST L9945TR

Manufacturer
ST
MPN
L9945TR
LCSC Part #
C2156048
Packaging
TQFP-64(10x10)
Customer #
Key Attributes
Automotive fully configurable 8-channel High/Low side MOSFET pre-driver suitable for 12 V and 24 V systems
DatasheetST L9945TR
RoHS Compliance2 documents available
Every Order Guarantee
100% Authentic · 30-Day Return or Replacement

Products Specifications

All
TypeDescription
CategoryIntegrated Circuits (ICs)/Power Management (PMIC)/Power Management - Specialized
ManufacturerST
PackagingTQFP-64(10x10)
FeaturesEnable shutdown;Dead-time control;Interleaved conduction protection;Charge pump boost
Driven ConfigurationHigh Side;Low Side;Full Bridge
Peak Output Current(Source)100uA
Operating Temperature-40℃~+150℃
Load TypeMOSFET
Number of Drivers8
Voltage - Supply4.5V~5.5V
Current - Output Low(IOL)100uA
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Introduction

AI Translation

The L9945 is an 8-channel MOSFET pre-driver configurable for low-side, high-side, peak and hold and H-Bridge load control. It is designed to comply with the requirements of 12 V (passenger vehicle) and 24 V (commercial vehicle) battery systems. All outputs can be PWM controlled. Six outputs are capable of driving safety relevant loads. One output can be dedicated to the actuation of safety relevant loads requiring a dedicated enable pin (EN6). The device offers the possibility of controlling two independent H-Bridges. The device can also drive up to two loads requiring "peak & hold" control strategy. The driver outputs are protected against short circuit condition. The device protects the external MOS in case of an overcurrent event. Each output provides full diagnostic information such as short to battery, short to ground and open-load. Each output status can be constantly monitored through dedicated SPI registers. The voltage slew rate of the external transistors 1-8 is controlled during turn ON and turn OFF in order to improve EMI behavior. A double, redundant, external disable source is available through DIS and NDIS pins in order to improve safety. The device is configurable via SPI through a 32-bit protocol.

Features

AI Translation
  • High-side (N-channel and P-channel MOS)
  • Low-side (N-channel MOS)
  • H-bridge (up to 2 H-bridge)
  • Peak & Hold (2 loads)
  • Short circuit to battery Open load Short circuit to ground
  • Highly flexible overcurrent sensing implementation
  • Possibility of monitoring external MOS drain to source voltage
  • Possibility of monitoring voltage on external shunt resistor
  • 64 programmable overcurrent thresholds independent for each channel
  • Ultra-fast output shutdown in case of overcurrent
  • Current limitation for H-Bridge configuration
  • Failures latched even if they occur during diagnostics reading
  • Daisy chain operation
  • SDO protected against overvoltage
  • Fast switch off redundant output disable through two external pins
  • Built In Self Test (BIST) for logic operation
  • Hardware Self Check (HWSC) for VDD5 overvoltage comparator
  • Configurable Communication Check (CC) watchdog timer available
  • Disable feedback through bi-directional pin
  • Highly redundant output monitoring through dedicated SPI registers
  • 10-bit ADC for battery and die temperature measurements available through SPI
  • VDD5 monitoring for over/under voltage
  • VPS (battery) monitoring for under voltage
  • ISO26262 systems compatible

Applications

AI Translation
  • Lamps (any channel)
  • ON/OFF electrovalves (any channel)
  • Any safety relevant load (channel 6 has dedicated EN6 enable input)
  • Lambda probe heater (any channel)
  • Limp home functionalities or not safety related loads (channels 7 and 8 not affected by external disable input)