5秒后页面跳转
MCH285S/883 PDF预览

MCH285S/883

更新时间: 2024-02-05 17:22:46
品牌 Logo 应用领域
CRANE 转换器输入元件
页数 文件大小 规格书
8页 167K
描述
DC/DC CONVERTERS 28 VOLT INPUT

MCH285S/883 数据手册

 浏览型号MCH285S/883的Datasheet PDF文件第2页浏览型号MCH285S/883的Datasheet PDF文件第3页浏览型号MCH285S/883的Datasheet PDF文件第4页浏览型号MCH285S/883的Datasheet PDF文件第5页浏览型号MCH285S/883的Datasheet PDF文件第6页浏览型号MCH285S/883的Datasheet PDF文件第7页 
FEATURES  
• -55°C to +125°C operation  
• 12 to 50 VDC input  
• Fully isolated  
MCH SERIES  
1.5 WATT  
DC/DC CONVERTERS  
28 VOLT NPUT  
I
• Magnetic feedback  
MODELS  
VDC OUTPUT  
• Fixed frequency 370 kHz typ.  
Topology – Current Mode Flyback  
• 80 V for up to 120 ms transient protection  
(70 V for 15 V single and dual models)  
• Inhibit function  
SINGLES  
DUALS  
5
5
5.2  
12  
15  
12  
15  
• Short circuit protection  
• Undervoltage lockout  
Size (max.): 0.980 x 0.805 x 0.270 inches (24.89 x 20.45 x 6.86 mm)  
Weight: 12 grams max.  
Screening: Standard, ES, or 883 (Class H)  
DESCRIPTION  
With a miniature footprint of just 0.8 square inches, the MCH  
Series™ of DC/DC converters delivers 1.5 watts of output power  
while saving significant board real estate. The wide input voltage  
range of 12 to 50 VDC accepts the varying voltages of military, aero-  
space, or space bus power and tightly regulates output voltages to  
protect downstream components. Transient protection of 80 volts for  
up to 120 milliseconds exceeds the requirements of MIL-STD-704A  
for the 5, 5.2, and 12 volt single models and the 12 volt dual model.  
The 15 volt single and dual converters will withstand transients of up  
to 70 volts for up to 120 milliseconds.  
INHIBIT FUNCTION  
When an open collector TTL logic low is applied to the inhibit  
terminal, pin 7, the converter shuts down and lowers the output  
voltage to near zero and input current to as low as 2.3 mA. Leaving  
the terminal open or applying an open collector TTL logic high will  
enable the converter.  
PROTECTION FEATURES  
Undervoltage lockout prevents the MCH Series converters from  
operating below approximately 8 VDC input voltage to keep system  
current levels smooth, especially during initialization or re-start oper-  
ations. All models include a soft-start function to prevent large  
current draw and minimize overshoot. The converters also provide  
short circuit protection by restricting the current.  
CONVERTER DESIGN  
MCH Series DC/DC converters incorporate a continuous flyback  
topology with a constant switching frequency of approximately 370  
kHz. Current-mode pulse width modulation (PWM) provides output  
voltage regulation. Output error voltage is magnetically fed back to  
the input side of the PWM to regulate output voltage. Regulation is  
also affected by the load; refer to the Electrical Characteristics  
tables on the following pages.  
MIL-STD-461  
Use Interpoint’s FMSA-461 EMI filter to pass the CE03 requirements  
of MIL-STD-461C.  
CONVENIENT PACKAGING  
Dual models regulate the negative output with magnetic coupling to  
the positive output. Up to 80% of the total load may be on one output  
providing that the other output carries a minimum of 20% of the total  
load. The dual models can be used at double the output voltage by  
connecting the load between positive and negative outputs, leaving  
the common unconnected. (ex: MCH2805D can be used as a 10  
VDC output.)  
The MCH Series converters are packaged in hermetically sealed,  
projection-welded metal cases which provide EMI/RFI shielding.  
1
POSITIVE  
INPUT  
+
0.47 µF  
typical  
3
+VIN  
FB  
POSITIVE  
OUTPUT  
+
PWM  
SHUTDOWN  
7
2
INHIBIT  
CONTROLLER  
+VOUT  
4
OUTPUT  
+
COMMON  
6
INPUT  
NEGATIVE  
OUTPUT  
COMMON  
DUAL MODELS ONLY  
FIGURE 1: BLOCK DIAGRAM  
1

与MCH285S/883相关器件

型号 品牌 获取价格 描述 数据表
MCH2890R FREESCALE

获取价格

DUAL POWER DRIVER
MCH2XXX ROHM

获取价格

2012(0805)Size chip capacitors : MCH21
MCH3007 SANYO

获取价格

High-Frequency Low-Noise Amplifi er
MCH3007-TL-H ONSEMI

获取价格

射频晶体管,NPN 单,12 V,30 mA,fT = 8 GHz
MCH3008 TELEDYNE

获取价格

1 TO 3400 MHz TO-8H TRIPLE-MCH3008 BALANCED MIXER
MCH3009 TELEDYNE

获取价格

1 TO 3400 MHz TO-8H TRIPLE-MCH3009 BALANCED MIXER
MCH305027-60.000MHZ MMD

获取价格

Oscillator,
MCH305027A-1.250MHZ MMD

获取价格

Oscillator,
MCH305027A-60.000MHZ MMD

获取价格

Oscillator,
MCH305048A-60.000MHZ MMD

获取价格

Oscillator,