max5059auit Maxim Integrated Products, Inc., max5059auit Datasheet - Page 19

• Manufacturer Part Number: max5059auit
• Description: Parallelable, Secondary-side Synchronous Rectifier Driver And Feedback-generator Controller Ics
• Manufacturer: Maxim Integrated Products, Inc.

When the MAX5051 is used as the primary-side con-
troller, additional benefits are also realized with its spe-
cial paralleling pins. The MAX5051 allows simultaneous
shutdown and wake-up, as well as frequency synchro-
nization and 180 degree out-of-phase operation of
each connected primary.
The current-share loop consists of the following func-
tional blocks:
•
Figure 13. Paralleling Multiple Power-Supply Modules for Current Sharing
Parallelable Secondary-Side Synchronous Rectifier
A diode ORed force amplifier that connects with the
other modules and forces the bus to carry a voltage
proportional to the highest current among the mod-
ules.
V
36V TO 72V
V
IN+
IN-
Driver and Feedback-Generator Controller ICs
______________________________________________________________________________________
V
V
SYNCIN
STARTUP
SYNCOUT
V
V
SYNCIN
STARTUP
SYNCOUT
V
V
SYNCIN
STARTUP
SYNCOUT
IN+
IN-
IN+
IN-
IN+
IN-
MAX5051
MAX5051
MAX5051
MRGU
MRGU
MRGU
POWER MODULE
POWER MODULE
POWER MODULE
AND
AND
AND
MRGD
MRGD
MRGD
MAX5058
MAX5059
MAX5058
MAX5059
MAX5058
MAX5059
OR
OR
OR
•
•
•
•
A sense amplifier that senses this share-bus volt-
age and applies it to internal circuitry.
A fixed gain of 20, current-sense amplifier that
senses the output current through a sense resistor.
A current-adjust amplifier that functions as an error-
amplifier block in the current-share loop.
A voltage-to-current (VtoI) block that adds a small
amount of current to the reference current, increas-
ing the reference voltage and enabling the module
to share more current.
V
V
V
V
V
V
OUT
OUT
OUT
CSN
CSN
CSN
CSP
VSP
VSN
OUT-
SFN
CSP
VSP
VSN
OUT-
SFN
CSP
VSP
VSN
OUT-
SFN
SFP
SFP
SFP
+
+
+
LOAD
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