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ACT85610 Datasheet Preview

ACT85610 Datasheet

Integrated High Voltage Power Loss Protection

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ACT85610
®
Integrated High Voltage Power Loss
Protection with PMIC
BENEFITS and FEATURES
HIGH PERFORMANCE POWER LOSS
PROTECTION
Wide 2.7-to-14V Operating Input Range with
14.4V OVP
20V Max Input Withstand Voltage
Adjustable Start-Up Slew Rate
Inrush Current Control
Configurable Power Failure Levels
Programmable 10A Input Current Limit
Programmable 5.5V to 31V Boost Storage
Voltage
31V@8A Synchronous Buck Supports 100% Duty
Cycle
Programmable up to 2.25MHz Buck Operating
Frequency for Small Inductor Size
Undetectable Transition from Input Supply to
Capacitor Bank Power
Compatible with Different Types of Storage Caps:
Super Caps, Electrolytic, Tantalum, POSCAP etc.
Autonomous Health Monitoring
Early Storage Capacitor Failure Detection
Storage Capacitance Measurement
eFuse, Boost, and Buck UV/OV/OC Protection
High Efficiency PMIC with Integrated FETs
4 High Voltage DC-DC Buck Converters
Integrated Synchronous Power Stage.
Up to 96% Efficiency
Optimized Single Stage Conversion from 12V for
Outputs as Low as 0.6V
Excellent Dynamic Response
Proprietary COT Control Algorithm
Small Inductor Sizes
Fast Transient Response
1 High Voltage Nonsynhronous Boost Regulator
1 LDO with Programmable Output Voltage
500 kHz – 2.0MHz Configurable Frequency
Range
Near Constant Frequency
Sensorless Over Current Protection (OCP)
Output UV and OV Detection
Ceramic Capacitor Stable
SYSTEM CONTROL AND INTERFACE
Dedicated Power Loss Indicator Pin (PLI)
6 Programmable General Purpose I/O (6 X
GPIOs)
I2C Serial Interface & Password Protection
ADC Monitoring of Critical Signals
Independent On & Off Sequencing Control.
Reset /Power Good Output
Configurable Rails On/Off though I2C/GPIO
Input Power, UV and OV Monitoring
Configurable Interrupts to Inform Host for any
Faults/Status Change
Thermal Alert and Protection
SYSTEM MANAGEMENT
Versatile GPIO Functions
Watchdog Supervision
Interrupt Function Available
I2C Safety bits to Enhance Immunity against
Spurious I2C Transactions.
Thermal Enhanced FCQFN Package
APPLICATIONS
Solid State Drives
Industrial Applications
Backup Power
Hot Plug Devices
Data Sheet Rev. 0.8, Dec. 31, 2019 | Subject to change without notice
1 of 58
www.qorvo.com




Qorvo

ACT85610 Datasheet Preview

ACT85610 Datasheet

Integrated High Voltage Power Loss Protection

No Preview Available !

ACT85610
Integrated High Voltage Power Loss
®
Protection with PMIC
GENERAL DESCRIPTION
The ACT85610 device is a highly integrated, high
configurable multiple output power management unit
(PMIC) with built-in power loss protection (PLP) IC.
There are four high efficiency Bucks that can supply 3 x
4A and 1 x 2A current with the output as low as 0.6V. In
addition, there is a Boost regulator with 12V output and
a fixed output Buck to provide the power for IC itself and
to supply power to the gate drivers in regulators for
maximum efficiency.
The power loss protection provides backup storage
power in the event of an input power failure. A built-in
Boost converter provides high voltage energy storage
to minimize storage capacitor size requirements. The
built-in supplement Buck converter regulates the
storage voltage to a fixed output voltage. It contains
internal, back-to-back eFuse FETs to provide bi-
directional input to output isolation. The IC also provides
hot swap and inrush current control.
The ACT85610 features programmable storage
capacitor voltage to optimize the storage capacitor
sizing and system run time. The internal ADC and health
monitoring provide an extra layer of protection and
improve system reliability and early capacitor failure
notification. It automatically checks the storage
capacitor health and notifies the user when the energy
in the storage caps is not sufficient for backup power.
The ADC also measures the input voltage, output
voltage, storage voltage, eFuse current, and die
temperature. The built-in synchronous supplement
Buck converter maximizes energy transfer from the
storage caps to the system.
The high voltage step-down regulators use a proprietary
control architecture that is based on a constant on-time
(COT) topology. It is designed for high efficiency, has
programmable switching frequency options, is suitable
for high conversion ratios to support output voltages as
low as 0.6V and can therefore operate at very low duty
cycles as required in low output voltage cases. It is
therefore suitable for a variety of step-down applications.
The proprietary architecture allows the regulators to
work at near constant frequency at a given operating
point, determined by the input and output voltage. As
load is varied, the regulator operates at a near constant
frequency while operating in continuous conduction
mode. The frequency is selectable to accommodate a
variety of inductor values and sizes. When load current
is reduced, frequency is automatically scaled back to
maintain high efficiency in discontinuous mode (DCM)
operation. The regulator achieves high efficiencies even
at light loads as a result.
Depending on the application, a suitable inductor must
be selected with careful considerations of the desired
transient response requirements and efficiency targets
which can be affected by the inductor choice and the
maximum DCR of the inductor. Based on these criteria,
a suitable switching frequency can then be selected to
ensure stable and well controlled output voltage
regulation and to maintain high efficiency. Careful
analysis of operating points - input and output voltage
ratio and load profiles, such as typical operating
currents where efficiency is most important, peak
switching currents, inductor current ripple and the
desired dynamic response should all be considered
while selecting inductors and for selecting the frequency
of operation. The regulators are all internally
compensated for stable operation using proprietary
methodology. This allows the PMIC to work with a
variety of inductor values and switching frequencies and
allows the end user to balance requirements such as
efficiency, dynamic load transient response, inductor
form factors and current ratings, peak inductor current
ripple and output voltage ripple. All the configurable
options have programmable defaults and can be
accessed and modified by the user using I2C and the
regulators can be independently optimized.
The ACT85610 also has a Boost regulator. The input to
the Boost regulator is typically in the range of 2.5V –
14V and the output voltage is configurable in the range
of 10.8V – 13.2V in Boost mode.
The fixed output Buck regulator is used as the power
supply to the IC itself and to supply power to the gate
drivers in the regulators, with 100mA max current
capability for external circuits and LDO input.
When input is 3.3V or 5V, the VCC pin is tied to VBUS
directly. The integrated LDO can support 300mA output
current. For applications when input voltage is higher
than 3.5V, Buck VCC is running, the maximum LDO
output current is limited at 50mA.
ACT85610 provides an I2C bus interface to allow MCU
control and monitoring. There are supervisor monitors
for the input voltage, output voltage, and storage
voltage. There are 6 configurable GPIOs available that
can be programmed to implement a variety of system
Data Sheet Rev. 0.8, Dec. 31, 2019 | Subject to change without notice
2 of 58
www.qorvo.com


Part Number ACT85610
Description Integrated High Voltage Power Loss Protection
Maker Qorvo
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