DA9313 datasheet(28/55 Pages) RENESAS

28 / 55 page

DA9313

High Efficiency Dual Cell Switched Capacitor Divider

Datasheet

Revision 3.6

16-Jun-2023

CFR0011-120-00

28 of 55

10.3.3

PVC Operating Modes

10.3.3.1

Standalone Mode

When the PVC is enabled, the operating mode is defined by the PVC_MODE register field. The PVC

operates either in fixed frequency (PVC_MODE= 0) or in automatic frequency mode (PVC_MODE=

1).

In automatic frequency mode, the switching frequency is not always constant, see Figure 13. The

PVC operates in continuous conduction mode (CCM) at high loads and moves to discontinuous

conduction mode (DCM) as soon as the load becomes lower than a certain threshold.

● When the load decreases, the VOUT voltage increases over the VPVC_DROP threshold and the PVC

moves from CCM to DCM.

● When the load increases again and the VOUT voltage decreases by VPVC_HYST below VPVC_DROP

and the PVC moves back from DCM to CCM.

Operating in automatic frequency mode extends the efficiency range to low levels of output loads,

enabling the PVC to supply a low voltage PMIC in low power mode over a long period.

Vpcv_hyst

Vpvc_drop

DCM request

Sudden Load

CCM Request

DCM threshold

VBAT/2

skip

MSI

Unloading

Vpvc_ms_drop

Vpvc_ms_hyst

Master :DCM

Slave : OFF

Master : CCM

Slave : ON

Master :CCM

Slave : OFF

Master: DCM

Slave : OFF

Master: CCM

Slave: OFF

Master: CCM

Slave: OFF

Load Decreasing

Light Load

Sudden Load

Applied

Load Decreasing

Figure 13: Master Slave Timing in Automatic Frequency Mode

10.3.3.2

Master/Slave Operation

The master device behaves in the same way as a standalone device, see section 10.3.3.1, with

additional VOUT monitoring at VMSI level (see Note below). This monitoring is used to trigger the slave

device via the master/slave interface (MS_IF). The level at which the master triggers the slave is

defined in PVC_MS_DROP.

When the VOUT voltage decreases beyond VMSI due to progressive output loading, the master

DA9313 enables the slave DA9313 over MS_IF.

When the VOUT voltage increases above VMSI + VPVC_MS_HYST (defined in PVC_MS_HYST), the master

DA9313 disables the slave DA9313 over MS_IF.

Disabling the master PVC triggers a shutdown of the slave PVC over MS_IF.

NOTE

VMSI = VCCM

– VPVC_MS_DROP

Where:

● VCCM = (VBAT/2 - VPVC_DROP - VPVC_HYSTMAX)

● VPVC_HYSTMAX is a constant value of 30 mV

DA9313 Datasheet(PDF) 28 Page - Renesas Technology Corp

DA9313 Datasheet(HTML) 28 Page - Renesas Technology Corp

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55

Datasheet Download

Link URL