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| 型号： | MAX1856EUB |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 1/18页 |
| 文件大小： | 0K |
| 描述： | IC PS PWM SLIC SYNCH 10-UMAX |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 50 |
| 应用： | 控制器，卫星接收机顶盒，xDSL 和线缆调制解调器 |
| 输入电压： | 3 V ~ 28 V |
| 输出数： | 1 |
| 输出电压： | -24V，-72V |
| 工作温度： | 0°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-TFSOP，10-MSOP（0.118"，3.00mm 宽） |
| 供应商设备封装： | 10-uMAX |
| 包装： | 管件 |
19-1898; Rev 0; 2/01
Wide Input Range, Synchronizable,
PWM SLIC Power Supply
General Description
The MAX1856 offers a low-cost solution for generating a
SLIC (ringer and off-hook) power supply. Using standard
off-the-shelf transformers from multiple vendors, the
MAX1856 generates various output voltages: -24V and
-72V (dual output) for both ringer and off-hook supplies for
voice-enabled broadband consumer premises equipment
(CPE), -48V for IP phones and routers, -5V and -15V (sin-
gle or dual output) for DSL CO line drivers, or negative
voltages as high as -185V for MEMS bias supplies. The
output voltages are adjusted with an external voltage
divider.
Due to its wide operating voltage range, the MAX1856
operates from a low-cost, unregulated DC power supply
for cost-sensitive applications like xDSL, cable modems,
set-top boxes, LMDS, MMDS, WLL, and FTTH CPE. The
MAX1856 provides low audio-band noise for talk battery
and a sturdy output capable of handling the ring trip con-
ditions for ring battery.
The operating frequency can be set between 100kHz and
500kHz with an external resistor in free-running mode. For
noise-sensitive applications, the MAX1856’s operating fre-
quency can be synchronized to an external clock over its
operating frequency range.
The flyback topology allows operation close to 50% duty
cycle, offering high transformer utilization, low ripple cur-
Features
o Low-Cost, Off-the-Shelf Transformer
o 3V to 28V Input Range
o Low Audio-Band Noise on Talk Battery
o Effectively Handles Ring Trip Transients
o Powers 2-, 4-, or 12-Line Equipment
o High Efficiency Extends Battery Life During
Life-Line Support Conditions
o Adjustable 100kHz to 500kHz Switching
Frequency
o Clock Synchronization
o Internal Soft-Start
o Current-Mode PWM and Idle Mode? Control
Scheme
o Logic-Level Shutdown
o 10-Pin μMAX Package
Ordering Information
rent, and less stress on input and output capacitors.
Internal soft-start minimizes startup stress on the input
capacitor, without any external components.
PART
MAX1856EUB
TEMP. RANGE
-40 ° C to +85 ° C
PIN-PACKAGE
10 μMAX
The MAX1856’s current-mode control scheme does not
require external loop compensation. The low-side current-
sense resistor provides accurate current-mode control
and overcurrent protection.
Typical Operating Circuit
Applications
VoIP Ringer and Off-Hook Voltage Generators
INPUT
3V TO 28V
OUT2
-72V
Cable and DSL Modems
Set-Top Boxes
Wireless Local Loop
V CC
SYNC/SHDN
LDO
1
2
FTTH
LMDS/MMDS
FREQ
EXT
CS
2
OUT1
-24V
Routers
Industrial Power Supplies
CO DSL Line Driver Supplies
MEMS Bias Supplies
Idle Mode is a trademark of Maxim Integrated Products.
MAX1856
GND
PGND
FB
REF
2
________________________________________________________________ Maxim Integrated Products
1
For price, delivery, and to place orders, please contact Maxim Distribution at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1856EUB+ | 功能描述:电信线路管理 IC Synchronizable PWM SLIC Power Supply RoHS:否 制造商:STMicroelectronics 产品:PHY 接口类型:UART 电源电压-最大:18 V 电源电压-最小:8 V 电源电流:30 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:VFQFPN-48 封装:Tray |
| MAX1856EUB+T | 功能描述:电信线路管理 IC Synchronizable PWM SLIC Power Supply RoHS:否 制造商:STMicroelectronics 产品:PHY 接口类型:UART 电源电压-最大:18 V 电源电压-最小:8 V 电源电流:30 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:VFQFPN-48 封装:Tray |
| MAX1856EUB-T | 功能描述:电信线路管理 IC RoHS:否 制造商:STMicroelectronics 产品:PHY 接口类型:UART 电源电压-最大:18 V 电源电压-最小:8 V 电源电流:30 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:VFQFPN-48 封装:Tray |
| MAX1856EVKIT | 功能描述:电源管理IC开发工具 Evaluation Kit for the MAX1856 RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| MAX1857EUA47 | 功能描述:低压差稳压器 - LDO 500mA Ripple-Rejecting RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
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