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参数资料
| 型号： | MAX256ASA+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 11/14页 |
| 文件大小： | 0K |
| 描述： | IC DVR H-BRIDGE 3W 8-SOIC |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 100 |
| 类型： | 半桥 |
| 输入类型： | 非反相 |
| 输出数： | 2 |
| 导通状态电阻： | 500 毫欧 |
| 电流 - 输出 / 通道： | 600mA |
| 电流 - 峰值输出： | 1A |
| 电源电压： | 3 V ~ 5.5 V |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm Width）裸露焊盘 |
| 供应商设备封装： | 8-SOICN 裸露焊盘 |
| 包装： | 管件 |
| 产品目录页面： | 1401 (CN2011-ZH PDF) |
3W Primary-Side Transformer H-Bridge Driver
for Isolated Supplies
V CC
+15V
MAX256
COMMON
-15V
V CC
RS485
MPU
OPTOISOLATORS
Figure 6. Isolated Power Supply for Process Control Applications
M
U
X
OPTOISOLATORS
DAC/ADC
As with all power-supply designs, it is important to opti-
mize efficiency. In designs incorporating small trans-
formers, the possibility of thermal runaway makes low
transformer efficiencies problematic. Transformer loss-
es produce a temperature rise that reduces the effi-
ciency of the transformer. The lower efficiency, in turn,
produces an even larger temperature rise.
To ensure that the transformer meets these require-
ments under all operating conditions, the design should
focus on the worst-case conditions. The most stringent
demands on ET product arise for minimum switching
frequency, maximum input voltage, maximum tempera-
ture, and load current. Additionally, the worst-case val-
ues for transformer and rectifier losses should be
considered.
The primary should be a single winding; however, the
secondary can be center-tapped, depending on the
desired rectifier topology. In most applications, the
phasing between primary and secondary windings is
not significant. Half-wave rectification architectures are
possible with the MAX256; however, these are discour-
aged. If a net DC current results due to an imbalanced
load, the magnetic flux in the core is increased. This
reduces the effective ET product and can lead to satu-
ration of the transformer core.
Transformers for use with the MAX256 are typically
wound on a high-permeability magnetic core. To mini-
mize radiated electromagnetic emissions, select a
toroid, pot core, E/I/U core, or equivalent.
+3.3V Operation
The MAX256 can be operated from a +3.3V supply by
increasing the turns ratio of the transformer, or by
designing a voltage-doubler or voltage-tripler circuit as
shown in Figure 1B.
Optimum performance at +3.3V is obtained with fewer
turns on the primary winding, since the ET product
is lower than for a +5V supply. However, any of the
transformers for use with a +5V supply will operate
properly with a +3.3V supply. For a given power level,
the transformer currents are higher with a +3.3V supply
than with a +5V supply. Therefore, the DC resistance
of the transformer windings has a larger impact on the
circuit efficiency.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX256ASA/V+T | 制造商:Maxim Integrated Products 功能描述:3W PRIMARY-SIDE TRANSFORMER H-BRIDGE DRIVER FOR ISOLATED SUP - Tape and Reel |
| MAX256ASA+ | 功能描述:功率驱动器IC 3W Primary-Side H-Bridge Driver RoHS:否 制造商:Micrel 产品:MOSFET Gate Drivers 类型:Low Cost High or Low Side MOSFET Driver 上升时间: 下降时间: 电源电压-最大:30 V 电源电压-最小:2.75 V 电源电流: 最大功率耗散: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Tube |
| MAX256ASA+ | 制造商:Maxim Integrated Products 功能描述:IC TRANSFORMER H-BRIDGE DRIVER 1A 8-SOI |
| MAX256ASA+T | 功能描述:功率驱动器IC 3W Primary-Side H-Bridge Driver RoHS:否 制造商:Micrel 产品:MOSFET Gate Drivers 类型:Low Cost High or Low Side MOSFET Driver 上升时间: 下降时间: 电源电压-最大:30 V 电源电压-最小:2.75 V 电源电流: 最大功率耗散: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Tube |
| MAX256ASA-T | 功能描述:功率驱动器IC RoHS:否 制造商:Micrel 产品:MOSFET Gate Drivers 类型:Low Cost High or Low Side MOSFET Driver 上升时间: 下降时间: 电源电压-最大:30 V 电源电压-最小:2.75 V 电源电流: 最大功率耗散: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Tube |
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