參數(shù)資料
型號(hào)： L6710TR
廠商： STMICROELECTRONICS
元件分類： 穩(wěn)壓器
英文描述： 2 A SWITCHING CONTROLLER, PQFP44
封裝： 10 X 10 MM, 1 MM HEIGHT, TQFP-44
文件頁(yè)數(shù)： 19/34頁(yè)
文件大小： 1610K
代理商： L6710TR
L6710
26/34
Since the generated noise is mainly due to the switching activity of the VRM, noise emissions depend on
how fast the current switch. To reduce noise emission levels, it is also possible, in addition to the previous
guidelines, to reduce the current slope and then to increase the switching times: this will cause, as a con-
sequence of the higher switching time, an increase in switching losses that must be considered in the ther-
mal design of the system.
Figure 19. - Layout Suggestions (not in scale).
Application Board Description
The application board shows the operation of the device in a dual phase application. This evaluation board
allows output voltage adjustability (0.8375V - 1.6000V) through the switches S0-S4 and high output cur-
rent capability.
The board has been laid out with the possibility to use up to two D2PACK mosfets for the low side switch
in order to give maximum flexibility in the mosfet choice.
The four layers demo board's copper thickness is of 70
m in order to minimize conduction losses consid-
ering the high current that the circuit is able to deliver.
Demo board schematic circuit is reported in Figure 20.
Several jumpers allow setting different configurations for the device: JP3, JP4 and JP5 allow configuring
the remote buffer as desired. Simply shorting JP4 and JP5 the remote buffer is enabled and it senses the
output voltage on-board; to implement a real remote sense, leave these jumpers open and connect the
FBG and FBR connectors on the demo board to the remote load.
To avoid using the remote buffer, simply short all the jumpers JP3, JP4 and JP5. Local sense through the
R7 is used for the regulation.
The input can be configured in different ways using the jumpers JP1, JP2 and JP6; these jumpers control
also the mosfet driver supply voltage. Anyway, power conversion starts from VIN and the device is sup-
plied from VCC (See Figure 21).
ATX 12 CONNECTOR
INPUT POWER PLANE
PHASE PLANE
OUTPUT
POWER PLANE
OUTPUT BULK
CAPACITORS
INPUT CAPS
CERAMIC
DECOUPLING
CAPACITORS
NTC FOR
THERMAL
COMPENSATION
SAFELY FAR
HIGH SPEED
DATA BUS
相關(guān)PDF資料
PDF描述
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L6716TR DUAL SWITCHING CONTROLLER, 225 kHz SWITCHING FREQ-MAX, QCC48
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