UM0546 STMICROELECTRONICS | Alldatasheet

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Technical content

Datasheet sections

  • 1 Description
  • 1.1 Introduction
  • 1.2 Main components
  • 2 Evaluation board description
  • 2.1 Features
  • 2.1.1 L9347 quad inte lligent power low-side switch
  • 2.1.2 L9352B quad low-side switch
  • 2.2 Board connections
  • 2.2.1 L9347 first valve drivers
  • 2.2.2 L9347 second valve drivers
  • 2.2.3 L9352B valve drivers
  • 2.2.4 Oscillator block
  • 3 Before you start
  • 3.1 How to exercise diagnostic functionality
  • 4 Hardware
  • 4.1 Overview
  • 5 Revision history

September 2013 Doc ID 14680 Rev 2 1/18 UM0546 User manual PTB801DB Evaluation board for ABS valve drivers system

1 Description

This document concern the main features of PTB801DB valve drivers for ABS board with 2 x L9347 and L9352B devices.

1.1 Introduction

The PTB801DBis a complete demonstrator of an ABS and ESC system based on STMicroelectronics devices. The board implements a flexible and open design demonstrating the capability of the STMicroelectronics 16/32 bit microcontrollers and devices for ABS applications. The PTB801DB mounts two L9347 and L9352B devices and accept external signal coming from PTB801 MB.

1.2 Main components

■ L9347 valve drivers ■ L9352B valve drivers ■ Connector for valves ■ Connector for VBATT power supply ■ Standardized CPU board connector providing access to off board I/O, PWM, SPI and power supply

2 Evaluation board description

PTB801DB mounts two L9347 and L9352B devices, the control caming from PTB801 MB. The board has opened connectivity to external valves.

2.1 Features

  • Full evaluation and development system based on the system basis chip L9347 and L9352B
  • Full system evaluation: integration, basic and safety functionalities

2.1.1 L9347 quad intelligent power low-side switch

functions. They are monitored by a status output. Figure 1. L9347 pin connection (top view)

Evaluation board description UM0546 6/18 Doc ID 14680 Rev 2 The L9347 is a quad low-side switch with following functions:

  • 2 x 5 A designed as conventional switch
  • 2 x 2.5 A designed as switched currentregulator
  • Low ON resistance 2 x 0.2 Ohm, 2 x 0.35 Ohm (typ.)
  • PowerSO-36 package with integrated cooling area
  • Integrated free wheeling and clamping Z diodes
  • Output slope control
  • Short circuit protection
  • Selective overtemperature shutdown
  • Open load detection
  • Ground and supply loss detection
  • External clock control
  • Recirculation control
  • Regulator drift detection
  • Regulator error control
  • Regulator resolution 5 mA
  • Status monitoring
  • Status push-pull stages
  • Electrostatic discharge (ESD) protection

2.1.2 L9352B quad low-side switch

from 0mA to 2.25 A. All channels are protected against fail functions. They are monitored by a status output. Figure 2. L9347 block diagram

  • Quad low-side switch
  • 2 x 5 A designed as conventional switch
  • 2 x 2.5 A designed as switched current-regulator
  • Low ON-resistance 4 x 0.2 Ohm (typ.)
  • PowerSO-36 package with integrated cooling area
  • Integrated free-wheeling and clamping Z-diodes
  • Output slope control
  • Short circuit protection
  • Selective overtemperature shutdown
  • Open load detection
  • Ground and supply loss detection
  • External clock control
  • Recirculation control
  • Regulator drift detection
  • Regulator error control
  • Regulator resolution 5 mA
  • Status monitoring
  • Status push-pull stages
  • Electrostatic discharge (ESD) protection

Figure 3. L9352B pin connection

Figure 4. L9352B block diagram

2.2 Board connections

  • PTB801 mother board;
  • External valves;
  • I/O signals to control valve drivers. The Table 1 describes the pin out of the valve connectors J5 and J6:

Figure 5. 4 valves controlled by first L9347 Figure 6. 4 valves controlled by second L9347 Figure 7. 4 valves controlled by L9352B Table 1. Valve connectors J6, J7 and J8

2.2.1 L9347 first valve drivers

status (STx_1) of the fist L9347 drivers. Table 1. Valve connectors J6, J7 and J8 (continued) Figure 8. First L9347 signals monitoring connectors Table 2. Valve connectors J11, J12 and J13

4 J11

4 J12

4 J13

2.2.2 L9347 second valve drivers

status (STx_2) of the second L9347 drivers.

2.2.3 L9352B valve drivers

status (STx_2) of the L9352B drivers. Figure 9. Second L9347 signals monitoring connectors Table 3. Valve connectors J22, J23 and J24

4 J22

4 J23

4 J24

Figure 10. L9352B signals monitoring connectors

4 J18

4 J19

4 J17

2.2.4 Oscillator block

different oscillator. Otherwise, is possible connect the CLK line with line caming from µC. Table 4. Valve connectors J17, J18 and J19 Figure 11. Oscillator and clock selector

1 MHz - OSCILLATOR

Table 5. Oscillator connectors J20, J21 and J22

3 Before you start

This section describes operations needed before powering up the board. Before powering up the mother board, could connect:

  • Daughter board PTB801DB
  • Wheel speed sensor board
  • µC mini module (ST10/JPC family)

3.1 How to exercise diagnostic functionality

The PTB801DB has many diagnostic features. Please see the L9347 and L9352B datasheet for detail.

4 Hardware

This chapter describes all the hardware modules of the board.

4.1 Overview

Figure 12. Layout of 2 x L9347 and L9352B devices

5 Revision history

Table 6. Document revision history 28-May-2009 1 Initial release. 17-Sep-2013 2 Updated Disclaimer.