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| 型号： | 5962-9320601MEA |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 电源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, CDIP16 |
| 封装： | DIP-16 |
| 文件页数： | 1/8页 |
| 文件大小： | 163K |
| 代理商： | 5962-9320601MEA |
UC1907, UC2907, UC3907
LOAD SHARE CONTROLLER
SLUS165B – MARCH 1999 - REVISED MAY 2001
1
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
D Fully Differential High Impedance Voltage
Sensing
D Accurate Current Amplifier for Precise
Current Sharing
D Opto Coupler Driving Capability
D 1.25% Trimmed Reference
D Master Status Indication
D 4.5-V to 35-V Operation
description
The UCx907 family of load share controller ICs provides all the necessary features to allow
multiple-independent-power modules to be paralleled such that each module supplies only its proportionate
share to total-load current.
This sharing is accomplished by controlling each module’s power stage with a command generated from a
voltage-feedback
amplifier
whose
reference
can
be
independently
adjusted
in
response
to
a
common-share-bus voltage. By monitoring the current from each module, the current share bus circuitry
determines which paralleled module would normally have the highest output current and, with the designation
of this unit as the master, adjusts all the other modules to increase their output current to within 2.5% of that
of the master.
The current share bus signal interconnecting all the paralleled modules is a low-impedance, noise-insensitive
line which will not interfere with allowing each module to act independently should the bus become open or
shorted to ground. The UC3907 controller will reside on the output side of each power module and its overall
function is to supply a voltage feedback loop. The specific architecture of the power stage is unimportant. Either
switching or linear designs may be utilized and the control signal may be either directly coupled or isolated
though the use of an optocoupler or other isolated medium.
Other features of the UC3907 include 1.25% accurate reference: a low-loss, fixed-gain current-sense amplifier,
a fully differential, high-impedance voltage sensing capability, and a status indicator to designate which module
is performing as master.
Copyright
2000, Texas Instruments Incorporated
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
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C/S OUT
C/S (+)
C/S (–)
(–) SENSE
POWER RETURN
ARTIFICIAL GND
VREF
ISET
STATUS INDICATE
CURRENT SHARE BUS
ADJ OUT
ADJ INPUT
COMP
(+) SENSE
VCC
OPTO DRIVE
DIL-16 J or N PACKAGE
(TOP VIEW)
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11
10
9
C/S OUT
C/S (+)
C/S (–)
(–) SENSE
POWER RETURN
ARTIFICIAL GND
VREF
ISET
STATUS INDICATE
CURRENT SHARE BUS
ADJ OUT
ADJ INPUT
COMP
(+) SENSE
VCC
OPTO DRIVE
SOIC-16 DW PACKAGE
(TOP VIEW)
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20
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32
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4
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ADJ OUT
ADJ INPUT
N/C
COMP
(+) SENSE
C/S (–)
(–) SENSE
N/C
POWER RETURN
ARTIFICIAL GND
C/S
(+)
C/S
OUT
N/C
ST
A
TUS
INDICA
TE
CURRENT
SHARE
BUS
ISET
N/C
OPT
O
DRIVE
VCC
VREF
PLCC-20, LCC-20,
Q OR L PACKAGE
(TOP VIEW)
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