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DP8105 5A DC-DC Intelligent dPOL Data Sheet

8V to 14V Input •••• 0.7V to 5.5V Output

BCD.00261 Rev. 1.0, 12 Feb 2013

www.power-one.com

Page 21 of 35

1.1.1.2

Grouping of dPOLs

dPWER

® dPOLs can be arranged in groups of up to

4, 8, 16 or 32 dPOLs (depending upon the DPM

model used). Membership in a group is set in the

GUI in the DPM / Configure / Devices dialog, and

implemented in hardware by connecting the OK pins

of each dPOL in the group to the matching OK input

on the DPM.

In order for a particular Fault or Error to propagate

through the OK line, Propagation needs to be

checked in the GUI dPOL Configure / Fault

Management Window Figure 34.

Figure 34. DPM Configure Faults Window

Note that the turn-off type of the fault as it

propagates through the DPM will remain unchanged.

Propagation options for dPOLs can be read or set in

the dPOL PC3 register shown in Figure 35.

Figure 35. Protection Configuration Register PC3

7.4.7.1

Front End and Crowbar

If an error is propagated to at least the Group level,

the DPM can also be configured to generate

commands to turn off a front end (a DC-DC

converter generating the intermediate bus voltage)

and to trigger an optional crowbar protection to

accelerate removal of the IBV voltage.

7.4.7.2

Propagation Process

Understanding Fault and Error propagation is easier

with the following examples.

The First example is of of non-propagation from a

dPOL, as shown in Figure 36. An undervoltage error

shuts down the Vo, but since propagation was not

enabled, OK-A is not pulled down and Vo2 stays up.

PC3: Protection Configuration Register 3

Address: 0x02

R/W-1

---

TRP

OTP

OCP

UVP

OVP

PVP

Bit 7

Bit 0

Bit 7:6

Unimplemented: Read as ‘0’

Bit 5

TRP: Tracking Protection Propagation

0 = disabled

1 = enabled

Bit 4

OTP: Over Temperature Protection Propagation

0 = disabled

1 = enabled

Bit 3

OCP: Over Current Protection Propagation

0 = disabled

1 = enabled

Bit 2

UVP: Under Voltage Protection Propagation

0 = disabled

1 = enabled

Bit 1

OVP: Over Voltage Protection Propagation

0 = disabled

1 = enabled

Bit 0

PVP: Reserved

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