November 2011

Doc ID 1107 Rev 10

1/16

16

L6234

Three phase motor driver

Features

■ Supply voltage from 7 to 52 V

■ 5 A peak current

■ RDSon 0.3 Ω typ. value at 25 °C

■ Cross conduction protection

■ TTL compatible driver

■ Operating frequency up to 150 kHz

■ Thermal shutdown

■ Intrinsic fast free wheeling diodes

■ Input and enable function for each half bridge

■ 10 V external reference available

Description

The L6234 is a triple half bridge to drive a

brushless DC motor.

It is realized in BCDmultipower technology which

combines isolated DMOS power transistors with

CMOS and Bipolar circuits on the same chip.

By using mixed technology it has been possible to

optimize the logic circuitry and the power stage to

achieve the best possible performance.

The output DMOS transistors can sustain a very

high current due to the fact that the DMOS

structure is not affected by the second breakdown

effect, the RMS maximum current is practically

limited by the dissipation capability of the

package.

All the logic inputs are TTL, CMOS and µP

compatible. Each channel is controlled by two

separate logic input.

L6234 is available in 20 pin PowerDIP package

(16+2+2) and in PowerSO20.

Table 1.

Device summary

Order code

Package

Packing

L6234

PowerDIP20

Tube

L6234PD

PowerSO20

Tube

L6234PD013TR

PowerSO20

Tape and reel

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