LTC4350 Datasheet, PDF (1/16 Pages) Linear Technology – Hot Swappable Load Share Controller

FEATURES
■ _{Build N + 1 Redundant Supply}
■ _{Hot Swap}^TM _{Power Supplies}
■ _{Isolates Supply Failures from Output}
■ _{Eliminates ORing Diodes}
■ _{Identifies and Localizes Output Low, Output High}
and Open-Circuit Faults
■ _{Output Voltages from 1.5V to 12V}
■ _{16-Lead Narrow SSOP Package}
U
APPLICATIO S
■ _{Servers and Network Equipment}
■ _{Telecom and Base Station Equipment}
■ _{Distributed Power Systems}
LTC4350
Hot Swappable
Load Share Controller
DESCRIPTIO
The LTC^®4350 is a load share controller that allows
systems to equally load multiple power supplies con-
nected in parallel. The output voltage of each supply is
adjusted using the SENSE⁺ input until all currents match
the share bus. The LTC4350 also isolates supply failures
by turning off the series pass transistors and identifying
the failed supply. The failed supply can then be removed
and replaced with a new unit without turning off the
system power. The LTC4350 is available in a 16-pin
narrow SSOP package.
, LTC and LT are registered trademarks of Linear Technology Corporation.
Hot Swap is a trademark of Linear Technology Corporation.
TYPICAL APPLICATIO
SENSE⁺
OUT⁺
5V Load Share (5A per Module)
SUD50N03-07
0.010Ω
V_OUT+ SHARE BUS V_OUT–
VICOR*
VI-J30-CY
51Ω
0.1µF 0.1µF
274k 43.2k
TRIM
SENSE^–
OUT ^–
0.1µF 121k 12.1k
470k
0.1µF
100Ω
37.4k
GATE
V_CC
UV
R⁺
LTC4350
R^– _FB
I_OUT
STATUS
OV
TIMER
GAIN COMP1
SB
R_SET
GND COMP2
1000pF
4.7µF
34k
150Ω
12.1k
STATUS
100Ω
SENSE⁺
OUT⁺
SUD50N03-07
0.010Ω
VICOR*
VI-J30-CY
TRIM
SENSE^–
OUT ^–
51Ω
0.1µF 0.1µF
274k 43.2k
0.1µF 121k 12.1k
470k
0.1µF
100Ω
37.4k
GATE
V_CC
UV
R⁺
LTC4350
R^– _FB
I_OUT
STATUS
OV
TIMER
GAIN COMP1
SB
R_SET
GND COMP2
1000pF
4.7µF
34k
150Ω
12.1k
STATUS
100Ω
*LOAD SHARING CIRCUIT WORKS WITH MOST POWER SUPPLIES THAT HAVE A SENSE⁺ OR FB PIN
4350 TA01
4350fa
1