LTC3300-2 데이터 시트보기 (PDF) - Linear Technology

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LTC3300-2

Addressable High Efficiency Bidirectional Multicell Battery Balancer

Linear Technology 

LTC3300-2

PIN FUNCTIONS

C1, C2, C3, C4, C5, C6 (Pins 24, 27, 30, 33, 36, 39):

C1 through C6 connect to the positive terminals of bat-

tery cells 1 through 6. Connect the negative terminal of

battery cell 1 to V–.

BOOST+ (Pin 40): Boost+ Pin. Connects to the anode of

the external flying capacitor used for generating sufficient

gate drive necessary for balancing the topmost battery cell

in a given LTC3300-2 sub-stack. A Schottky diode from

C6 to BOOST+ is needed as well. Alternately, the BOOST+

pin can connect to one cell up in the above sub-stack (if

present). This pin is effectively C7. (Note: “Sub-stack” refers

to the 3-6 battery cells connected locally to an individual

LTC3300-2 as part of a larger stack.)

BOOST– (Pin 41): Boost– Pin. Connects to the cathode of

the external flying capacitor used for generating sufficient

gate drive necessary for balancing the topmost battery

cell in a given LTC3300-2 sub-stack. Alternately, if the

BOOST+ pin connects to the next higher cell in the above

sub-stack (if present), this pin is a no connect.

BOOST (Pin 42): Enable Boost Pin. Connect BOOST to VREG

to enable the boosted gate drive needed for balancing the

top cell in a given LTC3300-2 sub-stack. If the BOOST+ pin

can be connected to the next cell up in the stack (i.e., C1

of the next LTC3300-2 in the stack), then BOOST should

be tied to V– and BOOST– no connected. This pin must

be tied to either VREG or V–.

A0, A1, A2, A3, A4 (Pins 43, 44, 45, 46, 47): Address

Inputs. The state of the address pins (VREG = 1, V– = 0)

determines the LTC3300-2 address. These pins must be

tied to either VREG or V–. See Serial Port in the Operation

section.

VREG (Pin 48): Linear Voltage Regulator Output. This 4.8V

output should be bypassed with a 1µF or larger capacitor

to V–. The VREG pin is capable of supplying up to 40mA

to internal and external loads. The VREG pin does not sink

current.

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For more information www.linear.com/LTC3300-2

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