ZY8110G-Q1 POWER ONE, ZY8110G-Q1 Datasheet - Page 14

• Manufacturer Part Number: ZY8110G-Q1
• Description: Module DC-DC 1-OUT 0.5V to 5.5V 10A 11-Pin SIP
• Manufacturer: POWER ONE
• Type: Step Downr

Specifications of ZY8110G-Q1

• Package: 11SIP
• Output Current: 10 A
• Output Voltage: 0.5 to 5.5 V
• Input Voltage: 8 to 14 V
• Number Of Outputs: 1
• Switching Regulator: Yes

8.1.1
The output voltage programming range is from 0.5V
to 5.5V.
voltage settings, the voltage range is divided into
sub-ranges as shown in Table 2.
8.1.2
If the output voltage needs to be varied by a certain
percentage, the margining function can be utilized.
The margining can be programmed in the GUI
Output Configuration window or directly via the I
bus using high level commands as described in the
‘”DPM Programming Manual”.
In order to properly margin POLs that are connected
in parallel, the POLs must be members of one of the
Parallel Buses.
Configuration Window shown in Figure 44.
8.1.3
Optimal voltage positioning increases the voltage
regulation window by properly positioning the output
voltage setpoint. Positioning is determined by the
load regulation that can be programmed in the GUI
Output Configuration window shown in Figure 18 or
directly via the I
register shown in Figure 29.
Figure 20 illustrates optimal voltage positioning
concept. If no load regulation is programmed, the
headroom (voltage differential between the output
voltage
approximately half of the voltage regulation window.
When load regulation is programmed, the output
voltage
increases, so the VI characteristic will have a
negative slope. Therefore, by properly selecting the
operating point, it is possible to increase the
headroom as shown in the picture.
ZD-01991 Rev. 1.1, 01-Jul-10
V
OUT MIN
Table 2. Output Voltage Adjustment Resolution
0.500
2.025
5.3
will
Output Voltage Setpoint
Output Voltage Margining
Optimal Voltage Positioning
setpoint
To improve the resolution of the output
, V
decrease
2
C bus by writing into the CLS
and
V
Refer to the
OUT MAX
2.000
5.25
5.5
as
a
, V
regulation
the
output
Resolution, mV
GUI System
www.power-one.com
12.5
25
50
limit)
current
2
C
is
8V to 14V Input
Increased headroom allows tolerating larger voltage
deviations. For example, the step load change from
light to heavy load will cause the output voltage to
drop. If the optimal voltage positioning is utilized, the
output voltage will stay within the regulation window.
Otherwise, the output voltage will drop below the
lower regulation limit. To compensate for the voltage
drop external output capacitance will need to be
added, thus increasing cost and complexity of the
system.
The effect of optimal voltage positioning is shown in
Figure 21 and Figure 22.
output load causes large peak-to-peak deviation of
the output voltage. By programming load regulation,
the peak to peak deviation is dramatically reduced.
Figure 21. Transient Response without Optimal Voltage
Upper Regulation
Lower Regulation
ZY8110 10A DC-DC Intelligent POL
Limit
Limit
Figure 20. Concept of Optimal Voltage Positioning
V
OUT
Positioning
Load Regulation
Headroom with
Light
Load
Headroom without
Load Regulation

0.5V to 5.5V Output
Operating
I
OUT
Point
In this case, switching
Load Regulation
VI Curve With
Page 14 of 28
Data Sheet
VI Curve Without
Load Regulation
Heavy
Load