參數(shù)資料
型號： DS2148GN
廠商： DALLAS SEMICONDUCTOR
元件分類： Digital Transmission Interface
英文描述： DATACOM, PCM TRANSCEIVER, BGA49
封裝： CABGA-49
文件頁數(shù)： 4/15頁
文件大?。?/td> 387K
代理商： DS2148GN
MAX8614A/MAX8614B
Dual-Output (+ and -) DC-DC
Converters for CCD
12
______________________________________________________________________________________
For stability, the inverter output filter capacitor, C2,
should satisfy the following:
C2 > (6L VREF IINVMAX ) /
(RCS D- (VREF - VINV) VINV)
where RCS = 0.0175 (MAX8614B), and 0.040
(MAX8614A). D- is 1 minus the inverter switch duty cycle
and is:
D- = VCC / VINV
Table 2 lists representative low-ESR capacitor suppliers.
Input Bypass Capacitor
Although the output current of many MAX8614A/
MAX8614B applications may be relatively small, the
input must be designed to withstand current transients
equal to the inductor current limit. The input bypass
capacitor reduces the peak currents drawn from the
voltage source, and reduces noise caused by the
MAX8614A/MAX8614B switching action. The input
source impedance determines the size of the capacitor
required at the input. As with the output filter capacitor,
a low-ESR capacitor is recommended. A 22F, low-ESR
capacitor is adequate for most applications, although
smaller bypass capacitors may also be acceptable with
low-impedance sources or if the source supply is
already well filtered. Bypass AVCC separately from VCC
with a 1.0F ceramic capacitor placed as close as pos-
sible to the AVCC and GND pins.
PCB Layout and Routing
Proper PCB layout is essential due to high-current lev-
els and fast-switching waveforms that radiate noise.
Breadboards or protoboards should never be used
when prototyping switching regulators.
Table 1. Inductor Selection Guide
OUTPUT VOLTAGES
AND LOAD CURRENT
INDUCTOR
L (
H)
DCR (m
)ISAT (A)
SIZE (mm)
TOKO
DB3018C, 1069AS-2R0
2.0
72
1.4
3 x 3 x 1.8
TOKO
DB3018C, 1069AS-4R3
4.3
126
0.97
3 x 3 x 1.8
TOKO
S1024AS-4R3M
4.3
47
1.2
4 x 4 x 1.7
Sumida
CDRH2D14-4R7
4.7
170
1
3.2 x 3.2 x 1.55
15V, 50mA
-7.5V, 100mA
TOKO
S1024AS-100M
10
100
0.8
4 x 4 x 1.7
Sumida
CDRH2D11-100
10
400
0.35
3.2 x 3.2 x 1.2
Sumida
CDRH2D14-100
10
295
0.46
3.2 x 3.2 x 1.55
15V, 20mA
-7.5V, 40mA
Murata
LQH32CN100K33
10
300
0.45
3.2 x 2.5 x 2
Table 2. Component Suppliers
SUPPLIER
PHONE
WEBSITE
INDUCTORS
Murata
770-436-1300
www.murata.com
Sumida
847-545-600
www.sumida.com
TOKO
847-297-0070
www.tokoam.com
DIODES
Central
Semiconductor
(CMHSH5-2L)
631-435-1110
www.centralsemi.com
Motorola
(MBR0540L)
602-303-5454
www.motorola.com
CAPACITORS
Taiyo Yuden
408-573-4150
www.t-yuden.com
TDK
888-835-6646
www.TDK.com
相關(guān)PDF資料
PDF描述
DS2148G DATACOM, PCM TRANSCEIVER, BGA49
DS2148TN DATACOM, PCM TRANSCEIVER, PQFP44
DS2148T DATACOM, PCM TRANSCEIVER, PQFP44
DS2151QNB DATACOM, FRAMER, PQCC44
DS2151QB DATACOM, FRAMER, PQCC44
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
DS2148GN+ 功能描述:網(wǎng)絡(luò)控制器與處理器 IC 5V E1/T1/J1 Line Interface RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray
DS2148GNB 功能描述:網(wǎng)絡(luò)控制器與處理器 IC RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray
DS2148T 功能描述:網(wǎng)絡(luò)控制器與處理器 IC 5V E1/T1/J1 Line Interface RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray
DS2148T+ 功能描述:網(wǎng)絡(luò)控制器與處理器 IC 5V E1/T1/J1 Line Interface RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray
DS2148TA2 功能描述:網(wǎng)絡(luò)控制器與處理器 IC 5V E1/T1/J1 Line Interface RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray
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