SGS Thomson Microelectronics S.A.B.Re, SABRE-LL-I Datasheet

Data Brief

For further information contact your local STMicroelectronics sales office.

May 2007 Rev 1 1/8

8

SABRE-LL-I

Combo motor driver

Features

■ Configurable Device

■ 4 Full Bridges to generate

– Up 2 DC motor drivers and 1 SteppEr

Motor Driver

or
– 4 DC motor drivers

■ Bridges (1 & 2) additional configurations are

– Super DC
– 2 Half Bridges
– 1 super Half Bridge
– 2 switches
–1 super switch

■ Bridges (3 & 4) additional configurations are:

– Same as Bridges 1&2, listed above;
– 2 Buck Regulators (Bridge 3)
– 1 Super Buck Regulator
– Battery Charger (Bridge 4)

■ One variable voltage Buck switching regulator

■ One switching regulator controller

■ One linear regulator

■ Bidirectional serial interface

■ Programmable Watchdog function.

■ Integrated power sequencing and supervisory

functions with fault signaling through serial
interface and external reset pin.

■ Thermal shutdown protection with thermal

warning capability.

■ Very low power dissipation in shut-down mode

(~35 mW)

■ Aux features

– Op amps
–Comparators
– Pass switches
– Multi-channels 9 bit ADC
–GPIOs

Description

SABRe is a new concept of IC in the Motion &
Power Supply field. ST aim is to follow the SABRe
specification and to offer to the customer an IC
with a wide number of features, that can be
configured and customized: Motor Drivers,
Regulators, high precision A/D Converter,
Operational Amplifiers and Voltage Comparators.

The start up configuration can be defined by the
GPIOs and then through the Serial Interface; a
customization can be done through a metal layer
in order to set more complex functions.

TQFP64 Exposed Pad

Table 1. Device summary

Part number Package Packing

SABRE-LL-I TQFP64 Tray

www.st.com

Block diagram SABRE-LL-I

2/8

Block diagram

Figure 1. Block diagram

Main Switching

regulator

Main

Linear

Driver

External FET

Switch Driver

Internal

r

egu

l

a

t

o

r

s

GPIOs

S
P

I

Batt. Charg.

circuitry

Charge Pump

Bridge 2

Bridge 3

Bridge 4

6 bits current Sink

DAC

Bridge 1

ADC

Analog Mux

S/H

(2x)

3.3V
Pass Sw.

Power Up

Sequencer

Supervisory

& Reset

Manager

Thermal

System

V

REF

=1V

SSAABBRRee

Switching reg.

controller

Int. Ref. Volt

Op Amps

AC0019

9

SABRE-LL-I Detailed description

3/8

Detailed description

● Four widely configurable Full Bridges. Diagonal R

dson

are:

– Bridge 1 and 2:

– Diagonal Rdson: 1.1Ω;
– Max operative current= 2.5A.

– Bridge 3 and 4:

– Diagonal Rdson: 1.6Ω;
– Max operative current= 1.5A.
The possible configurations for each bridge are the following:

– Bridge 1 or 2:

– DC motor driver
– Super DC (Bridge 1 and 2 paralleled form SuperBridge1)
– 2 Half Bridges
– 1 super Half Bridge
– 2 switches
– 1 super switch

– Bridge 3 has the same configurations as Bridge 1 or 2 (Bridge 3 and 4 paralleled they

form SuperBridge2) plus the following:
– ½ Stepper motor driver
– 2 Buck regulators (V

AUX1_SW

, V

AUX2_SW

)

– 1 super Buck regulator

– Bridge 4 has the same configurations as Bridge 1 or 2 (Bridge 4 and 3 paralleled they

form SuperBridge2) plus the following:
– ½ Stepper motor driver
– 1 Super Buck regulator (VAUX3_SW)
– Battery charger

● One variable voltage Buck switching regulator (V

MAIN_SW

) with:
– Internal soft start sequence.
– Pulse skipping strategy control.
– Internal PWM generation.
– Internal power FET.
– Regulated voltage range: 1-5 Volts.
– Output load current: 3.0 A.
– Switching frequency: ~250KHz.

● One switching regulator controller (V

EXT_SW

) with:
– Pulse skipping strategy control.
– Internal PWM generation.
– Regulated voltage range: 1-30 Volts.
– Current limitation.