DP8105 5A DC-DC Intelligent dPOL Data Sheet
8V to 14V Input 0.7V to 5.5V Output
•
7. Programmable Features
frequency and the duty cycle limit, that can only be
changed when the dPOL output is turned off.
Performance parameters of DP8105 dPOL
converters can be programmed via the industry
standard I2C communication bus. Each parameter
has a default value stored in the volatile memory
registers detailed in Table 1. The setup registers 00h
through 14h are programmed at the system power-
up. When the user programs new performance
parameters, they are stored in the DPM, which
overwrites the values in the registers With the new
data. Upon removal of the input voltage, the default
values are restored.
7.1
Output Voltage
The output voltage can be programmed in the GUI
Output Configuration window shown in Figure 11 or
directly via the I2C bus by writing into the VOS
register shown in Figure 12.
DP8105 converters can be programmed using the
Graphical User Interface or directly via the I2C bus by
using high and low level commands as described in
the "DPM Programming Manual".
Table 1. DP8105 Memory Registers
CONFIGURATION REGISTERS
Name
PC1
PC2
PC3
TC
Register
Protection Configuration 1
Protection Configuration 2
Protection Configuration 3
Tracking Configuration
Interleave and Frequency Configuration
Turn-On Delay
Turn-Off Delay
Voltage Loop Configuration
Current Limit Set-point
Address
0x00
0x01
0x02
0x03
0x04
0x05
0x06
0x07
0x08
0x09
0x0A
0x0B
0x0C
0x0D
0x0E
0x0F
0x10
0x11
0x12
0x13
0x14
Figure 11. Output Configuration Window
Note that the GUI shows the effect of setting PG, OV
and UV limits as both values and graphical limit bars.
Vertical hashed lines are error bars for the
Overcurrent (OC) limit.
INT
DON
DOF
VLC
CLS
DCL
PC4
V1H
V1L
V2H
V2L
V3H
V3L
CP
Duty Cycle Limit
Protection Configuration 4
1.1.1
Output Voltage Set-point
The output voltage programming range is from 0.7 V
to 5.5 V. The resolution is constant across the range
and is 2.5 mV. A Total of 3 registers are provided:
one should be used for the normal setpoint voltage;
the other two can be used to define a low/high
margining voltage setpoint. Note that each register is
16bit wide and that the high byte needs always to be
written / read first. The writing of the low byte triggers
the refresh of the whole 16bit register (the high byte
is written to a shadow register).
Output Voltage Setpoint 1 (Low Byte)
Output Voltage Setpoint 1 (High Byte)
Output Voltage Setpoint 2 (Low Byte)
Output Voltage Setpoint 2 (High Byte)
Output Voltage Setpoint 3 (Low Byte)
Output Voltage Setpoint 3 (High Byte)
Controller Proportional Coefficient
Controller Integral Coefficient
Controller Derivative Coefficient
Controller Derivative Roll-Off Coefficient
CI
CD
B1
STATUS REGISTERS
Name
RUN
ST
Register
Run enable / status
Status
Address
0x15
0x16
Unlike other configuration registers, the dPOL
controller's VOS registers are dynamic. Changes to
VOS values can be made while the output is enabled
over the I2C bus through register bypass commands
and the dPOL will change its output immediately.
MONITORING REGISTERS
Name
VOH
VOL
IO
Register
Address
0x17
0x27
0x18
0x19
Output Voltage High Byte (Monitoring)
Output Voltage Low Byte (Monitoring)
Output Current (Monitoring)
Temperature (Monitoring)
TMP
DP8105 parameters can be reprogrammed at any
time during the system operation and service except
for the digital filter coefficients, the switching
BCD.00261 Rev. 1.0, 12 Feb 2013
www.power-one.com
Page 11 of 35
POWER-ONE [ POWER-ONE ]
