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STMicroelectronics L9907 | Demoboard STEVAL-TTM001V1

5 kW low voltage high current inverter for automotive motor control applications

Overview

TopologyOther Topology
Switching frequency20 kHz
IC revision1

Description

L9907 is a smart power device realized in STMicroelectronics advanced BCD-6s technology. It is able to drive all PowerMOS transistors for 3-phase BLDC motor applications. The circuit is suitable to operate in environments with high supply voltage such as double battery. Supply related pins are capable of withstanding up to 90 V. Moreover, the device is able to control the six pre-driver channels independently. In this way it is possible to implement all kinds of electric motor control strategy.The integrated boost regulator provides sufficient gate charge for all PowerMOS down to a battery voltage of 6 V. All pre-drivers have dedicated connections with the MOSFET sources. The device offers programmability for a base gate output current via an external resistor. Moreover, via SPI, it is possible to select among 4 gate output current levels even while the application is running. All channels are protected against short circuit and the device is protected against overtemperature conditions. Moreover, the boost converter implements an over voltage protection to allow safe functionality of pre-drivers in all battery voltage conditions. During over voltage conditions, BST_C voltage is limited by temporarily switching off the boost regulator and pre-drivers are allowed to operate. Boost will be self re-enabled as soon as the output voltage decreases to an acceptable value.The device is equipped with 2 current sense amplifiers. Both have SPI selectable amplifier gain (10, 30, 50 and 100) and output offset voltage level in order to allow max flexibility for phase or ground current sense strategy. All I/O pins are 35 V compatible. Full diagnostic is available through SPI. The device is available in TQFP64. The device is protected against Shoot Through events.

Features

  • Low voltage, high current inverter kit with the following boards (not available separately)
  • Insulated metal substrate (IMS) for efficient cooling
  • Hosts 36 STH315N10F7 power MOSFETs in the H²PAK-6 (6 switch) package
  • Decoupling gate resistors (2.2 Ω)
  • 3-shunt resistors ground referred for current sensing (optional)
  • 3 NTCs for thermal protection
  • Based on L9907 three phase gate driver AEC-Q100 qualified
  • 34-pin Motor Control connector
  • Full diagnostic via SPI
  • Current sense amplifiers
  • overvoltage, undervoltage and overcurrent with VDS drop monitoring, overtemperature and shutdown
  • Programmable gate current capability
  • Bulk capacitor board
  • Current sensing board

Typical applications

  • 3-phase BLDC motor applications

Products

Order Code Data­sheet Downloads Product seriesL
(µH)
IR
(A)
ISAT
(A)
RDC
(mΩ)
fres
(MHz)
RDC typ.
(mΩ)
SizeVersionMountZ @ 100 MHz
(Ω)
Zmax
(Ω)
Test Condition ZmaxIR 2
(mA)
RDC max.
(Ω)
Type Samples
74404042033SPEC
9 files WE-LQS SMT Power Inductor 3.3 2 2.9 55 56 55 4018 SMT
74404063150SPEC
9 files WE-LQS SMT Power Inductor 15 1.45 1.9 125 24 6028 SMT
74456147SPEC
9 files WE-PD4 SMT Power Inductor 47 1.8 2.14 10 142 L SMT 0.19
7447714680SPEC
7 files WE-PD SMT Power Inductor 68 1.9 2.2 8 110 1050 Performance SMT 0.132
742792625SPEC
8 files WE-CBF SMT EMI Suppression Ferrite Bead 1.5 0603 SMT SMT 120 180 400 MHz 2000 0.05 High Current
74279206SPEC
9 files WE-CBF SMT EMI Suppression Ferrite Bead 2 0805 SMT SMT 30 55 1000 MHz 3000 0.025 High Current
Samples
Order Code Data­sheet Downloads Product seriesL
(µH)
IR
(A)
ISAT
(A)
RDC
(mΩ)
fres
(MHz)
RDC typ.
(mΩ)
SizeVersionMountZ @ 100 MHz
(Ω)
Zmax
(Ω)
Test Condition ZmaxIR 2
(mA)
RDC max.
(Ω)
Type Samples