參數(shù)資料
型號(hào)： LT3782
廠商： Linear Technology Corporation
英文描述： 2-Phase Step-Up DC/DC Controller
中文描述： 2相升壓型DC / DC控制器
文件頁(yè)數(shù)： 13/16頁(yè)
文件大?。?/td> 200K
代理商： LT3782
LT3782
13
3782fa
APPLICATIU
5. Losses in the boost diode. The power dissipation in the
boost diode is:
W
U
U
P
I
V
DIODE
O MAX
(
2
D
=
)
The boost diode can be a major source of power loss in
a boost converter. For 13.2V input, 42V output at 3A, a
Schottky diode with a 0.4V forward voltage would
dissipate 600mW, which represents about 1% of the
input power. Diode losses can become significant at
low output voltages where the forward voltage is a
significant percentage of the output voltage.
6. Other losses, including C
IN
and C
O
ESR dissipation and
inductor core losses, generally account for less than
2% of the total losses.
PCB Layout Considerations
To achieve best performance from an LT3782 circuit, the
PC board layout must be carefully done. For lower power
applications, a two-layer PC board is sufficient. However,
at higher power levels, a multiplayer PC board is recom-
mended. Using a solid ground plane under the circuit is the
easiest way to ensure that switching noise does not affect
the operation.
In order to help dissipate the power from MOSFETs and
diodes, keep the ground plane on the layers closest to the
layers where power components are mounted. Use power
planes for MOSFETs and diodes in order to improve the
spreading of the heat from these components into the
PCB.
For best electrical performance, the LT3782 circuit should
be laid out as follows:
Place all power components in a tight area. This will
minimize the size of high current loops. Orient the input
and output capacitors and current sense resistors in a way
that minimizes the distance between the pads connected
to ground plane.
Place the LT3782 and associated components tightly
together and next to the section with power components.
Use a local via to ground plane for all pads that connect to
ground. Use multiple vias for power components.
Connect the current sense inputs of LT3782 directly to the
current sense resistor pads. Connect the current sense
traces on the opposite sides of pads from the traces
carrying the MOSFETs source currents to ground. This
technique is referred to as Kelvin sensing.
相關(guān)PDF資料
PDF描述
LT3782EFE 2-Phase Step-Up DC/DC Controller
LTC3731 2-Phase Step-Up DC/DC Controller
LTC3731CG 16-Bit Edge-Triggered D-Type Flip-Flop With 3-State Outputs 48-SSOP -40 to 85
LTC3731CUH 16-Bit Edge-Triggered D-Type Flip-Flop With 3-State Outputs 48-SSOP -40 to 85
LTC3731IG 3-Phase, 600kHz, Synchronous Buck Switching Regulator Controller
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LT3782A 制造商:LINER 制造商全稱:Linear Technology 功能描述:2-Phase Step-Up DC/DC Controller
LT3782AEFE 制造商:LINER 制造商全稱:Linear Technology 功能描述:2-Phase Step-Up DC/DC Controller
LT3782AEFE#PBF 功能描述:IC REG CTRLR BST PWM CM 28-TSSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 特色產(chǎn)品:LM3753/54 Scalable 2-Phase Synchronous Buck Controllers 標(biāo)準(zhǔn)包裝:1 系列:PowerWise® PWM 型:電壓模式 輸出數(shù):1 頻率 - 最大:1MHz 占空比:81% 電源電壓:4.5 V ~ 18 V 降壓:是 升壓:無 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-5°C ~ 125°C 封裝/外殼:32-WFQFN 裸露焊盤 包裝:Digi-Reel® 產(chǎn)品目錄頁(yè)面:1303 (CN2011-ZH PDF) 其它名稱:LM3754SQDKR
LT3782AEFE#PBF 制造商:Linear Technology 功能描述:Switch Regulator IC
LT3782AEFE#TRPBF 功能描述:IC REG CTRLR BST PWM CM 28-TSSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標(biāo)準(zhǔn)包裝:4,500 系列:PowerWise® PWM 型:控制器 輸出數(shù):1 頻率 - 最大:1MHz 占空比:95% 電源電壓:2.8 V ~ 5.5 V 降壓:是 升壓:無 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-40°C ~ 125°C 封裝/外殼:6-WDFN 裸露焊盤 包裝:帶卷 (TR) 配用:LM1771EVAL-ND - BOARD EVALUATION LM1771 其它名稱:LM1771SSDX
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