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参数资料
| 型号： | MAX13256EVKIT# |
| 厂商： | Maxim Integrated |
| 文件页数： | 10/17页 |
| 文件大小： | 0K |
| 描述： | KIT EVAL FOR MAX13256 |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1 |
| 主要目的： | DC/DC，步降 |
| 输出及类型： | 1，隔离 |
| 输出电压： | 6.8 ~ 34.8 V |
| 电流 - 输出： | 300mA |
| 输入电压： | 8 ~ 36 V |
| 稳压器拓扑结构： | 全桥式 |
| 频率 - 开关： | 425kHz |
| 板类型： | 完全填充 |
| 已供物品： | 板 |
| 已用 IC / 零件： | MAX13256 |
MAX13256
36V H-Bridge Transformer
Driver for Isolated Supplies
N:1 CT
Applications Information
+
V IN
-
+
V IN
-
N:1
+
V OUT = 1/(2 x N) x V IN - V D
-
V D = DIODE FORWARD VOLTAGE
FIGURE 3A. PUSH-PULL RECTIFICATION
+
V OUT = 2(V IN /N - V D )
-
FIGURE 3B. VOLTAGE DOUBLER
Snubber
For V DD greater than 27V, use a simple RC snubber
circuit on ST1 and ST2 to ensure that the peak voltage is
less than 40V during switching ( Figure 4 ). Recommended
values for the snubber are R = 91 I and C = 330pF.
Power Dissipation
The power dissipation of the device is approximated by:
P D = (R OHL x I PRI2 ) + (I DD x V DD )
where R OHL is the combined high-side and low-side on-
resistance of the internal FET drivers, and IPRI is the load
current flowing through ST1 and ST2.
High-Temperature Operation
When the MAX13256 is operated under high ambient
temperatures, the power dissipated in the package can
raise the junction temperature close to thermal shutdown.
+
V IN
-
N:1
+
V OUT = V IN /N - 2V D
-
Under such temperature conditions, the power dissipa-
tion should be held low enough so that that junction tem-
perature observes a factor of safety margin. The maximum
junction temperature should be held below +140°C. Use
the package’s thermal resistances to calculate the junc-
tion temperature. Alternatively use the Maximum Output
Current vs. Temperature curves shown in the Typical
FIGURE 3C. FULL-WAVE RECTIFIER
Figure 3. Secondary-Side Rectification Topologies
ST1
Operating Characteristics section to determine the maxi-
mum ST1/ST2 load currents.
Hot Insertion
If the MAX13256 is inserted into a live backplane, it is
possible to damage the device. Damage is caused by
overshoot on V DD exceeding the absolute maximum
rating. Limit the transient input voltage to the MAX13256
with an external protection device.
ST2
R
91 I
R
91 I
Output-Ripple Filtering
Output-voltage ripple can be reduced with a lowpass LC
filter (see Figure 5 ). The component values shown give a
f 3dB =
C
330pF
Figure 4. Output Snubber
L
25μH
Figure 5. Output Ripple Filtering
Maxim Integrated
C
330pF
FILTER
OUTPUT
C
2.2μF
cutoff frequency of 21.5kHz by the equation:
1
2 π LC
Use an inductor with low DC resistance and sufficient sat-
uration current rating to minimize filter power dissipation.
Power-Supply Decoupling
Bypass V DD to ground with a 1 F F ceramic capacitor as
close as possible to the device.
10
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX13256EVKIT# | 功能描述:电源管理IC开发工具 36V Transformer Driver 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 |
| MAX1325ECM | 功能描述:模数转换器 - ADC RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
| MAX1325ECM+ | 功能描述:模数转换器 - ADC 14-Bit 4Ch 526ksps 3V Precision ADC RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
| MAX1325ECM+T | 功能描述:模数转换器 - ADC 14-Bit 4Ch 526ksps 3V Precision ADC RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
| MAX1325ECM-T | 功能描述:模数转换器 - ADC RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
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