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DPA423P-TL

更新时间： 2024-02-10 08:39:05
品牌 Logo 应用领域
帕沃英蒂格盛 - POWERINT 转换器
页数 文件大小 规格书
36页 289K
描述
Highly Integrated DC-DC Converter ICs for Distributed Power Architectures

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DPA423P-TL 技术参数

是否无铅： 含铅是否Rohs认证： 不符合
生命周期：Active零件包装代码：SFM
包装说明：PLASTIC, MO-169-7C, 6 PIN针数：6
Reach Compliance Code：compliant风险等级：5.19
模拟集成电路 - 其他类型：SWITCHING REGULATOR控制模式：VOLTAGE-MODE
控制技术：PULSE WIDTH MODULATION最大输入电压：75 V
最小输入电压：16 V标称输入电压：40 V
JESD-30 代码：R-PSSO-G6JESD-609代码：e0
长度：9.4 mm功能数量：1
端子数量：6最高工作温度：125 °C
最低工作温度：-40 °C最大输出电流：1.75 A
封装主体材料：PLASTIC/EPOXY封装形状：RECTANGULAR
封装形式：SMALL OUTLINE峰值回流温度（摄氏度）：NOT SPECIFIED
认证状态：Not Qualified座面最大高度：2.054 mm
表面贴装：YES切换器配置：SINGLE
最大切换频率：425 kHz技术：CMOS
温度等级：AUTOMOTIVE端子面层：Tin/Lead (Sn/Pb)
端子形式：GULL WING端子节距：1.27 mm
端子位置：SINGLE处于峰值回流温度下的最长时间：NOT SPECIFIED
宽度：8 mmBase Number Matches：1

DPA423P-TL 数据手册

 浏览型号DPA423P-TL的Datasheet PDF文件第4页浏览型号DPA423P-TL的Datasheet PDF文件第5页浏览型号DPA423P-TL的Datasheet PDF文件第6页浏览型号DPA423P-TL的Datasheet PDF文件第8页浏览型号DPA423P-TL的Datasheet PDF文件第9页浏览型号DPA423P-TL的Datasheet PDF文件第10页 
DPA423-426  
will be initiated the next time CONTROL pin voltage reaches  
5.8.V. If the power supply loses regulation before reaching the  
UV lower threshold, the device will enter auto-restart. At the  
end of each auto-restart cycle (S7), the UV comparator is  
enabled.IftheUVupperthresholdisnotexceededtheMOSFET  
will be disabled during the next cycle (see Figure 5). The UV  
feature can be disabled independent of OV feature.  
DPA-Switch is not restricted by this feature under normal  
operation.  
Remote ON/OFF  
Remote ON/OFF control describes operation where the IC is  
turned on or off for long periods as opposed to the cycle-by-  
cycle on/off control which is described in the Synchronization  
section below.  
Line Overvoltage Shutdown (OV)  
The same resistor used for UV also sets an over voltage  
threshold which, once exceeded, will force the DPA-Switch  
outputintotheoff-statewithinoneswitchingcycle. Theratioof  
OV and UV thresholds is preset at 2.7 as can be seen in  
Figure 7. When the MOSFET is off, the input voltage surge  
capability is increased to the voltage rating of the MOSFET  
(220 V), due to the absence of the reflected voltage and leakage  
spikes on the drain. A small amount of hysteresis is provided on  
the OV threshold to prevent noise triggering. The OV feature  
can be disabled independent of the UV feature as shown in  
Figure 13.  
DPA-Switch can be turned on or off by controlling the current  
into the LINE-SENSE pin or out from the EXTERNAL  
CURRENT LIMIT pin (see Figure 7). This allows easy  
implementation of remote ON/OFF control of DPA-Switch in  
several different ways. A transistor or an optocoupler output  
connected between the EXTERNAL CURRENT LIMIT pin  
and the SOURCE pin implements this function with “active-  
on” (Figures 17, 19 and 21) while a transistor or an optocoupler  
output connected between the LINE-SENSE pin and the  
CONTROL pin implements the function with “active-off”  
(Figures 18, 20 and 22).  
Line Feed Forward with DCMAX Reduction  
When a signal is received at the LINE-SENSE pin or the  
EXTERNAL CURRENT LIMIT pin to disable the output  
through any of the pin functions such as OV, UV and remote  
ON/OFF, DPA-Switch always completes its current switching  
cycle before the output is forced off. The internal oscillator is  
stopped at the end of the current cycle and stays there as long as  
the disable signal exists. When the signal at the above pins  
changes state from disable to enable, the internal oscillator  
starts the next switching cycle.  
The same resistor used for UV and OV also implements line  
voltage feed forward that minimizes output line ripple and  
reduces power supply output sensitivity to line transients. This  
feed forward operation is illustrated in Figure 4 by the different  
values of IL. Note that for the same CONTROL pin current,  
higher line voltage results in smaller operating duty cycle. As  
an added feature, the maximum duty cycle DCMAX is also  
reduced from 75% (typical) at a voltage slightly higher than the  
UV threshold to 33% (typical) at the OV threshold  
(see Figures 4, 7). Limiting DCMAX at higher line voltages helps  
prevent transformer saturation due to large load transients in  
forward converter applications. DCMAX of 33% at the OV  
threshold was chosen to ensure that the power capability of the  
The remote ON/OFF feature can be used as a standby or power  
switch to turn off the DPA-Switch and keep it in a very low  
power consumption state for indefinitely long periods. If the  
DPA-Switch is held in remote-off state for longer than 10 µs  
f
≥ 128 kHz;  
t
≤ 7.7 µs; 120 ns ≤ t  
≤ 2250 ns for f  
≤ 3080 ns for f  
= 400 kHz  
= 300 kHz  
SYNC  
OFF  
ON  
OSC  
OSC  
Oscillator  
(SAW)  
D
MAX  
2 V  
0 V  
Time  
V
L
t
ON  
t
OFF  
ON  
OFF  
SYNC  
PI-2762-070501  
Figure 6. Synchronization Timing Diagram.  
K
1/04  
7
1...45678910...36

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