DA9213 datasheet(25/62 Pages) DIALOG

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DA9213, DA9214, and DA9215

Multi-Phase 5A/Phase DC-DC Buck Converter

Datasheet

Revision 2.2

23-Oct-2017

CFR0011-120-00

25 of 62

output voltage selectable for the buck rail (see VBUCKA_A and VBUCKA_B registers). In Track

Mode, only single ended remote sensing is possible.

In Track Mode, the content of the VBUCKA_SEL bit is ignored, as well as VBUCKA_A and

VBUCKA_B bits. They will become active again once the voltage track mode is disabled. The GPI0

does not generate any event in this case.

Figure 16: Concept of Control of the B

uck’s Output Voltage

7.1.4

Soft Start-Up

To limit in-rush current from VSYS, the buck converters can perform a soft start after being enabled.

The start-up behavior is a compromise between acceptable inrush current from the battery and turn

on time. In DA9213, DA9214, and DA9215, different ramp times can be individually configured for

each buck converter on register BUCKA_UP_CTRL and BUCKB_UP_CTRL. Rates higher than

20 mV/µs may produce overshoot during the start-up phase, so they should be considered carefully.

A ramped power down can be selected on register bits BUCKA_DOWN_CTRL and

BUCKB_DOWN_CTRL. When no ramp is selected, the output node will be discharged only by the

pull down resistor, if enabled via BUCKA_PD_DIS and BUCKB_PD_DIS.

7.1.5

Current Limit

The integrated current limit is meant to protect DA9213, DA9214, and DA9215

’s power stages and

the external coil fr

om excessive current. The bucks’ current limit should be configured to be at least

40 % higher than the required maximum continuous output current.

When reaching the current limit, each buck converter generates an event and an interrupt to the host

processor unless the interrupt has been masked using the OCx_MASK controls. These OCA_MASK

and OCB_MASK control bits can be used to mask the generation of over current events during DVC

transitions. An extra masking time as defined in OCx_MASK will be automatically added to the DVC

interval after the DVC has finished in order to ensure that the possible high current levels needed for

DVC do not influence the event generation.

DA9213 Datasheet(PDF) 25 Page - Dialog Semiconductor