參數(shù)資料
型號: SC411EVB
廠商: Semtech Corporation
英文描述: Synchronous Buck Pseudo-Fixed Frequency Power Supply Controller
中文描述: 同步降壓偽固定頻率電源控制器
文件頁數(shù): 19/27頁
文件大?。?/td> 488K
代理商: SC411EVB
19
2007 Semtech Corp.
www.semtech.com
SC411
POWER MANAGEMENT
As shown below, VOUT should be routed away from noisy traces (such as BST, DH, DL and LX) and in a quiet layer (if
possible) to the output capacitor(s).
Figure 7: VOUT Sense Trace Routing
Next, the schematic in Figure 8 below shows the power section. The highest di/dts occur in the input loop (highlight-
ed in red) and thus this loop should be kept as small as possible.
Figure 8: Power Section and Input Loop
The input capacitors should be placed with the highest frequency capacitors closest to the loop to reduce EMI. Use
large copper pours to minimize losses and parasitics. See Figure 9 for an example.
VOUT
+
C6
220u/25m
7343
VOUT
VOUT
1
VCCA
2
FB
3
PGD
4
N
5
V
6
P
7
D
8
VDDP
9
ILIM
10
LX
11
DH
12
B
1
N
1
E
1
T
1
T
U1
SC411
C5
56p
0402
0402
0402
+
C7
220u/25m
7343
R3
20k0
R5
14k3
Q1
IR F 7811AV
C 2
2n2/50V
0402
VBAT
L1
2u2
+
C 6
220u/25m
7343
VOU T
Q2
F D S6676S
C 3
0u1/25V
0603
C 4
10u/25V
1210
+
C 7
220u/25m
7343
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
SC411MLTRT 制造商:Semtech Corporation 功能描述:Synchronous Buck Pseudo-Fixed Frequency Power Supply Controller
SC412A 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:Synchronous Buck Controller
SC412A_1 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:Synchronous Buck Controller
SC412AEVB 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:Synchronous Buck Controller
SC412AMLTRT 功能描述:IC REG CTRLR BUCK PWM 16-MLP 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:4,000 系列:- PWM 型:電壓模式 輸出數(shù):1 頻率 - 最大:1.5MHz 占空比:66.7% 電源電壓:4.75 V ~ 5.25 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 ~ 85°C 封裝/外殼:40-VFQFN 裸露焊盤 包裝:帶卷 (TR)