Maxim-integrated MAX15303 PMBus Command Set Bedienungsanleitung PDF herunterladen (Seite 49)

MAX15303 PMBus Command Set User’s Guide

Page 49 of 52

COMP_MODEL

Reference:

Maxim Specific

Lockable:

Yes

Command Code:

0xDB

Format:

Linear

Data Bytes:

6 (see Description)

Units:

Scalar

Transfer:

Read/Write Block

Factory Value:

0.025, 0.41666, 1.0

Description/Notes:

The COMP_MODEL command provides access to key control loop tuning parameters. The three

arguments are as follows:

Data Byte

Number

Data Byte

Name Units Description

0 F

None

Power stage LC double-pole frequency, as a fraction of the

PWM fundamental frequency. In typical operation, this

parameter is determined by parametric extraction.

1 F

None

Output capacitor ESR zero frequency, as a fraction of the PWM

fundamental frequency.

2 Z

None

Power stage damping factor. Higher values indicate a more

damped LC filter; lower values represent a less damped filter.

The values of COMP_MODEL can be altered by the parametric extraction function of the MAX15303.

They will reset to the USER store values whenever the output is disabled, unless bit 3 of

ADAPTIVE_MODE is cleared.

Note that the values in COMP_MODEL are not saved during a STORE_USER_ALL or

STORE_DEFAULT_ALL operation, unless the values have previously been set by a PMBus write to

COMP_MODEL, as indicated by bit 14 of STRAP_DISABLE. This safety feature prevents inadvertent

storage of parametric extraction results that could adversely affect the initial ramp control loop tuning.

Wait at least 500μs for execution after sending the COMP_MODEL command before sending additional

PMBus commands.

DEADTIME_GCTRL

Reference:

Maxim Specific

Lockable:

Yes

Command Code:

0xE7

Format:

See Description

Data Bytes:

Units:

N/A

Transfer:

Read/Write Block

Factory Value:

See Description

Description/Notes:

The DEADTIME_GCTRL command allows configuration and adjustment of static gate-drive timing. The

arguments for this command are as follows:

Byte

# Data Name

Data

Type Description

Default

Value

fixedDTR (LSB)

Signed

Integer

Static rising-edge deadtime adjustment, given in

nanoseconds

fixedDTR (MSB)

fixedDTF (LSB)

Signed

Integer

Static falling-edge deadtime adjustment, given

in nanoseconds

fixedDTF (MSB)

TDR (LSB)

Signed

Integer

AGD system rising edge deadtime target value

(AGD system disabled, do not alter this value)

TDR (MSB)

TDF (LSB)

Signed

AGD system falling edge deadtime target value

1 2 ... 44 45 46 47 48 49 50 51 52

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