MAX5971BETI+ Maxim Integrated Products, MAX5971BETI+ Datasheet
MAX5971BETI+
Manufacturer Part Number
MAX5971BETI+
Description
Hot Swap & Power Distribution IEEE 802.3af/at PSE Controller
Manufacturer
Maxim Integrated Products
Specifications of MAX5971BETI+
Lead Free Status / Rohs Status
Details
19-5336; Rev 0; 6/10
The MAX5971B is a single-port power controller designed
for use in IEEE
equipment (PSE). This device provides powered device
(PD) discovery, classification, current limit, and DC and
AC load-disconnect detections. The MAX5971B sup-
ports both fully automatic operation and software pro-
grammability, and features an integrated power MOSFET
and sense resistor. The device supports detection and
classification operation from a single 54V supply. In
addition, it supports 2-event classification and new Class
5 classification of high-power PDs. The MAX5971B pro-
vides up to 40W to a single port (Class 5 enabled) and
still provides high-capacitance detection for legacy PDs.
The device provides four operating modes to suit differ-
ent system requirements. By default, auto mode allows
the device to operate automatically at its default settings
without any software. Semiautomatic mode automatically
detects and classifies a device connected to the port
after initial software activation, but does not power the
port until instructed to by software. Manual mode allows
total software control of the device and is useful for
system diagnostics. Shutdown mode terminates all port
activities and securely turns off power to the port.
The IC features an I
face, and is fully software-configurable and program-
mable. The device provides instantaneous readout of
port current through the I
extensive programmability enhances system flexibility,
enables field diagnosis and allows for uses in other, non
standard applications.
The device provides input undervoltage lockout (UVLO),
input undervoltage detection, input overvoltage lockout,
overtemperature protection, output voltage slew-rate limit
during startup, and LED status indication. The MAX5971B
programmability includes startup timeout, overcurrent
timeout, and load-disconnect detection timeout.
The device is available in a space-saving, 28-pin TQFN
(5mm x 5mm) power package and is rated for the
extended (-40NC to +85NC) temperature range.
IEEE is a registered service mark of the Institute of Electrical and Electronics Engineers, Inc.
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
Single-Port PSE End-Point Applications
Single-Port PSE Power Injectors (Midspan Applications)
Switches/Routers
M
_______________________________________________________________ Maxim Integrated Products 1
802.3af/at-compliant power-sourcing
2
C-compatible, 2-wire serial inter-
General Description
2
C interface. The device’s
Single-Port, 40W, IEEE 802.3af/at,
Applications
PSE Controller with I
S IEEE 802.3af/at Compliant
S Up to 40W for Single-Port PSE Applications
S Integrated Power MOSFET and Sense Resistor
S Supports 54V Single-Supply Operation
S PD Detection and Classification
S I
S Instantaneous Readout of Port Current Through
S Programmable Current Limit for Class 5 PDs
S High-Capacitance Detection for Legacy Devices
S Supports Both DC and AC Load Removal
S Current Foldback and Duty-Cycle-Controlled
S LED Indicator for Port Status
S Direct Fast-Shutdown Control Capability
S Space-Saving, 28-Pin TQFN (5mm x 5mm) Power
+Denotes a lead(Pb)-free/RoHS-compliant package.
*EP = Exposed pad.
MAX5971BETI+
I
Detections
Current Limit
Package
-54V
2
2
C-Compatible, 2-Wire Serial Interface
C Interface
PART
V
V
LED
PWMEN
LEGACY
MIDSPAN
OSC
EN
Typical Operating Circuit
EE
EE_DIG
SDA
SERIAL INTERFACE
SCL
MAX5971B
-40NC to +85NC
TEMP RANGE
Ordering Information
AGND
AD0
OUTP
ILIM1
ILIM2
INT
OUT
DET
PIN-PACKAGE
28 TQFN-EP*
Features
PSE OUTPUT
2
C
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