SABRE-LL-I datasheet(13/141 Pages) STMICROELECTRONICS

13 / 141 page

SABRE-LL-I

S.A.B.Re’s main features

13/141

S.A.B.Re’s main features

S.A.B.Re includes the following circuits:

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Four widely configurable full bridges:

–

Bridges 1 and 2:

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Diagonal RDSon: 0.6

Ω typ.

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Max operative current = 2.5A.

–

Bridges 3 and 4:

–

Diagonal RDSon: 0.85

Ω typ.

–

Max operative current = 1.5A.

●

Possible configurations for each bridge are the following:

–

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:

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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:

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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 (VMAIN_SW) with:

–

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: ~250kHz.

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Pulse skipping strategy control.

●

One switching regulator controller (VEXT_SW) 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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