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参数资料
| 型号： | MAX256ASA+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 12/14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
L1
25 μ H
FILTER
OUTPUT
4.7 μ F
470nF
+5V
C1
2.2 μ F
MAX256
ST1
1:1.75
0.1 μ F
+5V ISOLATED
0.1 μ F
MODE
CK_RS
ST2
Figure 7. Output Ripple Filter
47k ?
GND
0.1 μ F
0.1 μ F
-15V ISOLATED
ALL DIODES
+5V
MBRS140
4.7 μ F
470nF
MAX256
ST1
1:2.6CT
+5V ISOLATED
0.1 μ F
Figure 10. +5V to Isolated ±15V
MODE
Diode Selection
47k ?
CK_RS
GND
ST2
The high switching speed of the MAX256 necessitates
high-speed rectifiers. Ordinary silicon signal diodes
such as 1N914 or 1N4148 may be used for low-output
current levels (less than 50mA). At higher output cur-
rents, select low forward-voltage Schottky diodes to
improve efficiency. Ensure that the average forward
current rating for the rectifier diodes exceeds the maxi-
Figure 8. +5V to Isolated +5V
+3.3V
mum load current of the circuit. For surface-mount
applications, Schottky diodes such as the BAT54,
MBRS140 and MBRS340 are recommended.
Capacitor Selection
4.7 μ F
470nF
Input Bypass Capacitor
47k ?
MODE
CK_RS
MAX256
GND
ST1
ST2
1:2
+5V
ISOLATED
0.1 μ F
ALL DIODES
MBRS140
Bypass the supply voltage to GND with a 0.47μF
ceramic capacitor as close to the device as possible.
Additionally, connect a 4.7μF or greater capacitor to
provide input voltage filtering. The equivalent series
resistance (ESR) of the input capacitors is not as criti-
cal as for the output capacitors. Typically, ceramic X7R
capacitors are adequate.
Output Filter Capacitor
Figure 9. +3.3V to Isolated +5V
Low-Power Applications and Multiple Transformers
For more information about transformer selection, please
refer to the MAX3535E data sheet. The MAX3535E uses a
transformer in a similar topology. See Tables 3, 4, and 5
in the MAX3535E data sheet for a list of commercially
available transformers. These transformers are preferred
for lower power applications and are suitable for use with
the MAX256 up to the power limits of the transformers.
Alternatively, the MAX256 can drive the primaries of two
or more low-power transformers to provide multiple isolat-
ed outputs. One or more of the manufacturers listed in the
MAX3535E data sheet may produce a custom trans-
former for specific applications. Contact the individual
transformer suppliers for details.
In most applications, the actual capacitance rating of the
output filter capacitor is less critical than the capacitor's
ESR. In applications sensitive to output voltage ripple,
the output filter capacitor must have low ESR. For optimal
performance, the capacitance should meet or exceed
the specified value over the entire operating temperature
range. Capacitor ESR typically rises at low temperatures;
however, OS-CON capacitors can be used at tempera-
tures below 0°C to help reduce output voltage ripple in
sensitive applications. In applications where low output-
voltage ripple is not critical, standard ceramic 0.1μF
capacitors are sufficient.
12
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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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