XRP9710 Datasheet, PDF (26/36 Pages) Exar Corporation – Dual 6A Programmable Power Module

XRP9710 and XRP9711
Dual 6A Programmable Power Module
voltage against its user defined Power
Good threshold limits (Power Good
minimum and maximum levels). It has no
hysteresis. Multiple channel selections will
be combined using the AND logic function
of all channels selected.
The Power Good minimum and maximum
levels are expressed as percentages of the
target voltage.
• HW Flags – these are hardware
monitoring functions forwarded to
GPIO0 only. The functions include
Under-Voltage Warning, Over-
Temperature Warning, Over-Voltage
Fault, Over-Current Fault and Over -
Current Warning for every channel.
Multiple selections will be combined
using the OR logic function.
• External Clock-in – enables the
controller to lock to an external clock
including one from another XRP9710/1
applied to the GPIO0 pin. There are two
ranges of clock frequencies the controller
accepts, selectable by a user.
“PGood Max” is the upper window and
“PGood Min” is the lower window. The
minimum and maximum for each of these
values can be calculated with the following
equation:
𝑁 ∗ 𝐿𝑆𝐵(𝑚𝑉) ∗ 10⁵
𝑃𝐺𝑂𝑂𝐷(%) = _{𝑉𝑡𝑎𝑟𝑔𝑒𝑡 (𝑉)}
Where N=1 to 63 for the PGOOD Max
value and N=1 to 62 for the PGOOD Min
value. For example, with the target
voltage of 1.5V and set point resolution of
2.5mV (LSB), the Power Good min and
max values can range from 0.17% to
10.3% and 0.17% to 10.5% respectively.
A user can effectively double the range by
changing to the next higher output
voltage range setting, but at the expense
of reduced set point resolution.
• External Clock-out – clock sent out
through GPIO1 for synchronizing with
another XRP9710/1 (see the clock out
section for more information).
FAULT HANDLING
• HW Power Good – the Power Good
hardware monitoring function. It can only
be forwarded to GPIO1. This is an output
voltage monitoring function that is a
hardware comparison of channel output
There are six different types of fault handling:
• Under Voltage Lockout (UVLO)
monitors voltage supplied to the Vcc pin
and will cause the controller to shut down
© 2014 Exar Corporation
26/36
Rev. 1.0.1