L6460 datasheet(14/139 Pages) STMICROELECTRONICS

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L6460’s main features

L6460

14/139

Doc ID 17713 Rev 1

L6460’s main features

L6460 includes the following circuits:

●

Four widely configurable full bridges:

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Bridges 1 and 2:

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Diagonal RDSon: 0.6 Ω typ.

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Max operative current = 2.5 A.

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Bridges 3 and 4:

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Diagonal RDSon: 0.85 Ω typ.

–

Max operative current = 1.5 A.

●

Possible configurations for each bridge are the following:

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Bridge 1:

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DC motor driver.

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Super DC (bridge 1 and 2 paralleled form superbridge1).

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2 independent half bridges.

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1 super half bridge (bridge 1 side A and bridge 1 side B paralleled form

superhalfbridge1).

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2 independent switches (high or low side).

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1 super switch (high or low side).

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Bridge 2 has the same configurations of bridge 1.

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Bridge 3 has the same configurations of bridge 1 (bridge 3 and 4 paralleled form

superbridge2) plus the following:

–

½ stepper motor driver.

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2 buck regulators (VAUX1_SW, VAUX2_SW).

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1 Super buck regulator (VAUX1//2_SW).

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Bridge 4 has the same configurations of bridge 1 plus the following:

–

½ stepper motor driver.

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1 super buck regulator (VAUX3_SW).

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Battery charger.

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One buck type switching regulator (VSWmain) with:

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Output regulated voltage range: 1-5 Volts.

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Output load current: 3.0 A.

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Internal output power DMOS.

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Internal soft start sequence.

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Internal PWM generation.

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Switching frequency: ~250

kHz.

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Pulse skipping strategy control.

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One switching regulator controller (VSWDRV) with:

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Output regulated voltage range: 1-30 Volts.

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Selectable current limitation.

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Internal PWM generation.

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Pulse skipping strategy control.

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One linear regulator (VLINmain) that can be used to generate low current/low ripple

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