- 您現(xiàn)在的位置：買(mǎi)賣IC網(wǎng) > PDF目錄384654 > MAX1856EUB (MAXIM INTEGRATED PRODUCTS INC) Replaced by TMS320C6202B : Fixed-Point Digital Signal Processor 352-FCBGA 0 to 0 PDF資料下載
參數(shù)資料
| 型號(hào)： | MAX1856EUB |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | Replaced by TMS320C6202B : Fixed-Point Digital Signal Processor 352-FCBGA 0 to 0 |
| 中文描述： | SWITCHING CONTROLLER, 575 kHz SWITCHING FREQ-MAX, PDSO10 |
| 封裝： | MICRO MAX PACKAGE-10 |
| 文件頁(yè)數(shù)： | 15/18頁(yè) |
| 文件大?。?/td> | 594K |
| 代理商： | MAX1856EUB |
第1頁(yè)第2頁(yè)第3頁(yè)第4頁(yè)第5頁(yè)第6頁(yè)第7頁(yè)第8頁(yè)第9頁(yè)第10頁(yè)第11頁(yè)第12頁(yè)第13頁(yè)第14頁(yè)當(dāng)前第15頁(yè)第16頁(yè)第17頁(yè)第18頁(yè)
M
Wide Input Range, Synchronizable,
PWM SLIC Power Supply
______________________________________________________________________________________
15
This gives a value of about 22
for R7. However, this
snubber adds capacity to the MOSFET output, and this
in turn increases the dissipation in the MOSFET during
turn-on.
The selection of the input and output snubbers is an
interactive process. The design procedures above pro-
vide initial component recommendations, but the actual
values depend on the layout and transformer winding
practices used in the actual application.
Applications Information
Voice-over-IP CPE systems have +5V or +12V available
from which the talk battery voltage and the ringer volt-
age must be generated. The examples given below are
circuits using these supply voltages to generate the
negative power supplies needed in such applications.
Low Input Voltage
IP phones and routers require -48V. For cost-sensitive
applications, this needs to be used from an available
+5V supply. The circuit in Figure 4 is an example of
such a circuit using an off-the-shelf transformer from
Coiltronics and ICE components.
SLIC Power Supply with Split Feedback
Telephones in broadband systems use low-power-con-
suming SLICs that reduce the power drain by providing
the option of using two voltages for loop supervision.
The load on each output is dependent on the number
of lines on- or off-hook. The higher voltage is used to
generate ring battery voltage when the subscriber is on-
hook, while a second lower voltage is used to generate
talk battery voltage when off-hook is detected. The actu-
al value of these two voltages can be adjusted based on
system requirements and the specific SLIC used. The
design given here specifically addresses the supply
requirements for the AMD79R79 SLIC device with on-
chip ringing. The input voltage is 12V nominal, and the
output voltages are -24V at 400mA and -72V at 100mA.
The transformer turns ratio is 1:2:2:2, where 24V appears
across each secondary winding. The -72V output is
derived from the -24V output by stacking the secondary
windings in series as shown in Figure 1. A split feedback
is used, using resistors R1, R2, and R3. This allows for
accurate regulation of both outputs (see
Typical
Operating Characteristics
).
R
t
C
7
6
=
CS
EXT
FB
LDO
FREQ
INPUT
3V TO 28V
R
OSC
C4
C
LDO
R
CS
C
IN
GND
REF
V
CC
PGND
SYNC/SHDN
MAX1856
OUTPUT
T1
D1
C5
C6
8
6
5
4
R6
R7
R5
9
10
1
2
3
7
R4
R1
R3
C
REF
C1
C3
C
FB
M1
Figure 3. Feedback Compensation and Snubber Circuits
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MAX1864 | Fixed-Point Digital Signal Processor 352-FCBGA |
| MAX1864-MAX1865 | Fixed-Point Digital Signal Processor 384-FC/CSP |
| MAX1865 | Fixed-Point Digital Signal Processor 352-FCBGA |
| MAX1864UEEE | xDSL/Cable Modem Triple/Quintuple Output Power Supplies |
| MAX1865UEEP | xDSL/Cable Modem Triple/Quintuple Output Power Supplies |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX1856EUB+ | 功能描述:電信線路管理 IC Synchronizable PWM SLIC Power Supply RoHS:否 制造商:STMicroelectronics 產(chǎn)品:PHY 接口類型:UART 電源電壓-最大:18 V 電源電壓-最小:8 V 電源電流:30 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VFQFPN-48 封裝:Tray |
| MAX1856EUB+T | 功能描述:電信線路管理 IC Synchronizable PWM SLIC Power Supply RoHS:否 制造商:STMicroelectronics 產(chǎn)品:PHY 接口類型:UART 電源電壓-最大:18 V 電源電壓-最小:8 V 電源電流:30 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VFQFPN-48 封裝:Tray |
| MAX1856EUB-T | 功能描述:電信線路管理 IC RoHS:否 制造商:STMicroelectronics 產(chǎn)品:PHY 接口類型:UART 電源電壓-最大:18 V 電源電壓-最小:8 V 電源電流:30 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VFQFPN-48 封裝:Tray |
| MAX1856EVKIT | 功能描述:電源管理IC開(kāi)發(fā)工具 Evaluation Kit for the MAX1856 RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評(píng)估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
| MAX1857EUA47 | 功能描述:低壓差穩(wěn)壓器 - LDO 500mA Ripple-Rejecting RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動(dòng)電壓（最大值）:307 mV 輸出電流:1 A 負(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。