14

DS749A1

CS4412

4.2.3

Recommended Power-Down Sequence

1.

Mute the logic-level PWM inputs present on IN1 - IN4 by applying 50 % duty-cycle inputs.

2.

Set RSTx/y low. If the CS4412 is configured for ramping, the outputs will ramp down to PGND and

then become HI-Z. If the CS4412 is not configured for ramping, the outputs will immediately become

HI-Z.

3.

Power down the remainder of the system.

4.

Turn off the system power.

4.3

Output Mode Configuration

The CS4412 can be configured for several modes of operation. Table 2 shows the setting of the CNFG[2:0]

inputs and the corresponding mode of operation. These pins should remain static during operation (RSTx/y

set high).

CNFG2 CNFG1 CNFG0 Output Config.

Description

0

0

0

Stereo Full-Bridge

Tied Loads

IN1 must be inverted from IN2 for full-bridge operation.

IN3 must be inverted from IN4 for full-bridge operation.

0

0

1

Stereo Half-Bridge

and Mono Full-

Bridge Tied Loads

IN1 must be provided for half-bridge operation.

IN2 must be provided for half-bridge operation.

IN3 must be inverted from IN4 for full-bridge operation.

0

1

0

Mono Parallel Full-

Bridge Tied Load

IN1 and IN3 must be inverted from IN2 and IN4 for parallel full-

bridge operation.

0

1

1

Quad Half-Bridge

Tied Loads

IN1 must be provided for half-bridge operation.

IN2 must be provided for half-bridge operation.

IN3 must be provided for half-bridge operation.

IN4 must be provided for half-bridge operation.

1

0

0

Stereo Full-Bridge

Tied Loads

With Inversion

IN1 must be provided for full-bridge operation.

Wire IN2 to IN1. IN2 is internally inverted for full-bridge operation.

IN3 must be provided for full-bridge operation.

Wire IN4 to IN3. IN4 is internally inverted for full-bridge operation.

1

0

1

Stereo Half-Bridge

& Mono Full-Bridge

Tied Loads

With Inversion

IN1 must be provided for half-bridge operation.

IN2 must be provided for half-bridge operation.

IN3 must be provided for full-bridge operation.

Wire IN4 to IN3. IN4 is internally inverted for full-bridge operation.

1

1

0

Mono Parallel Full-

Bridge Tied Load

With Inversion

IN1 must be provided for parallel full-bridge operation.

Wire IN4, IN3, and IN2 to IN1.

IN2 and IN4 are internally inverted for parallel full-bridge operation.

1

1

1

Quad Half-Bridge

Tied Loads

IN1 must be provided for half-bridge operation.

IN2 must be provided for half-bridge operation.

IN3 must be provided for half-bridge operation.

IN4 must be provided for half-bridge operation.

Table 2. Output Mode Configuration Options