L9958 datasheet(1/38 Pages) STMICROELECTRONICS

Part #	L9958

Description	Low RDSON SPI controlled H-Bridge

PDF	38 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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This is information on a product in full production.

December 2013

DocID17269 Rev 6

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L9958

Low RDSON SPI controlled H-Bridge

Datasheet

- production data

Features

 Programmable current regulation peak

threshold by SPI up to 8.6 A typ.

 Operating battery supply voltage 4.0 V to 28 V

 Operating Vdd supply voltage 4.5 V to 5.5 V

 All pins withstand 19 V, Vs and output pins

withstand 40 V

 Full path Ron from 100 mΩ (at Tj = -40 °C) to

300 mΩ (at Tj =150 °C)

 Logic inputs TTL/CMOS-compatible

 Operating frequency up to 20 kHz

 16-bit SPI interface for

configuration/diagnostics, daisy chain

capability

 Over temperature and short circuit protection

 VS undervoltage disable function

 Vdd undervoltage and overvoltage protection

 Vdd overvoltage detection

 Open-load detection in ON condition

 Full diagnostics in OFF state

 Enable and disable input

 Low stand by current (<10 μA)

 Voltage and current slew-rate control for low

EMI, programmable through SPI

 Available in three power packages

Description

The L9958 is an SPI controlled H-Bridge,

designed for the control of DC and stepper motors

in safety critical applications and under extreme

environmental conditions.

The H-Bridge is protected against over

temperature, short circuits and has an

undervoltage lockout for all the supply voltages Vs

and Vdd, and for overvoltage on Vdd. All

malfunctions cause the output stages to go

tristate.

Detailed failure diagnostics on each channel is

provided via SPI: short circuit to battery, short

circuit to ground, short circuit overload, over

temperature.

Open-load can be detected in ON condition, for

the widest application ranges. Current regulation

threshold can be set by SPI from 2.5 A to 8.6 A

(Typ.), in 4 steps. Guaranteed accuracy is ±10 %

on all temp range, using an external reference

resistor with 1% accuracy over all temp range.

Current limitation threshold is linearly reduced by

temperature over 165 °C.and a thermal warning

bit is set by SPI. The H-Bridge contains integrated

free-wheel diodes. In case of free-wheeling

condition, the low side transistor is switched on in

parallel of its diode to reduce power dissipation.

A multiple wire bonding technique, as well as ST

proprietary package design is making L9958

compatible with three power packages, for

maximum flexibility:

PowerSO-20 package (medium power, JEDEC

standard MO166);

PowerSO16 package (medium power, lower

cost);

PowerSSO24 package (low power, very low cost

JEDEC standard MO271A).

PowerSO-20 PowerSSO24 PowerSO16

Table 1. Device summary

Order code

Package

Packing

L9958

PowerSO-20

Tube

L9958SB

PowerSO16

Tube

L9958XP

PowerSSO24

Tube

www.st.com

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