XRP9710 Datasheet, PDF (19/36 Pages) Exar Corporation – Dual 6A Programmable Power Module

XRP9710 and XRP9711
Dual 6A Programmable Power Module
FUNCTIONAL OVERVIEW
The XRP9710 is a digital pulse width
modulation (DPWM) power module with two
6A converters. In addition, the XRP9711
provides two additional PWM controller outputs
which can directly drive external power stage.
Each output voltage can be programmed from
0.6V to 5.5V without the need for an external
voltage divider. The wide range of
programmable DPWM switching frequencies
(from 124 kHz to 1.23 MHz) enables the user
to optimize for efficiency or component sizes.
Since the digital regulation loop requires no
external passive components, loop
performance is not compromised due to
external component variation or operating
conditions.
The XRP9710/1 provides a number of critical
safety features, such as Over-Current
Protection (OCP), Over-Voltage Protection
(OVP), Over-Temperature Protection (OTP)
plus input Under-Voltage Lockout (UVLO). In
addition, a number of key health monitoring
features including warning level flags for the
safety functions, Power Good (PGOOD), plus
full monitoring of system voltages and
currents. The above are all programmable
and/or readable from the SMBus and many
are steerable to the GPIOs for hardware
monitoring.
For hardware communication, the XRP9710/1
has two logic level General Purpose Input-
Output (GPIO) pins and three, 15V, open-
drain, Power System Input-Output (PSIO)
pins. Two pins are dedicated to the SMBus
data (SDA) and clock (SCL).
The 5V LDO is used for internal power and is
also optionally available to power external
circuitry.
The primary benefit of these modules is the
ultra small footprint and height, but these
come with a full suite of advanced power
management capabilities. All outputs are
independently programmable which provides
the user full control of the delay, ramp rate,
and sequence during power up and power
down. The user may also control how the
outputs interact and power down in the event
of a fault. This includes active ramp down of
the output voltages to take down an output
voltage as quickly as possible. Another useful
feature is that the outputs can be defined and
controlled as groups.
The XRP9710/1 has two main types of
programmable memory. The first type is
runtime registers that contain configuration,
control and monitoring information for the
chip. The second type is rewritable Non-
Volatile Flash Memory (NVFM) that is used for
permanent storage of the configuration data
along with various chip internal functions.
During power up, the run time registers are
loaded from the NVFM allowing for standalone
operation.
The XRP9710/1 brings an extremely high level
of functionality and performance to a
programmable power system.
Ever
decreasing product budgets require the
designer to quickly analyze cost/performance
tradeoffs to be truly successful. By
incorporating four switching channels, a user
LDO, and internal gate drivers, all in a single
package, the XRP9710/1 allows for extremely
cost effective power system designs. Another
key cost factor that is often overlooked is the
unanticipated Engineering Change Order
(ECO). The programmable versatility of the
XRP9710/1, along with the lack of hard wired,
on board configuration components, allows for
minor and major changes to be made on the
board by simple reprogramming.
© 2014 Exar Corporation
19/36
Rev. 1.0.1