Datasheet > SMFLHP2815D/R

SMFLHP2815D/R

更新时间： 2024-11-19 09:59:35

品牌	Logo	应用领域
CRANE		/
页数	文件大小	规格书
10页	181K
描述
Analog Circuit, Hybrid,

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技术参数
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SMFLHP2815D/R 技术参数

生命周期：	Contact Manufacturer	包装说明：	,
Reach Compliance Code：	compliant	风险等级：	5.1
Is Samacsys：	N	Base Number Matches：	1

SMFLHP2815D/R 数据手册

FEATURES

SMFLHP SERIES

100 WATT

DC/DC CONVERTERS

28 VOLT INPUT

• Fully qualified to Class H or K

• –55° to +125°C operation

• 19 to 40 VDC input

• Fully Isolated

• Magnetic feedback

MODELS

• Fixed frequency, 600 kHz typical

• Topology – Single Ended Forward

• Inhibit function – input and output

• Sync function

• Output trim on single output models

• Indefinite short circuit protection

• Remote sense on single output models

• Up to 87% efficiency

VDC OUTPUT

SINGLE

3.3

DUAL

• Parallelable up to 270 watts

Size (max.): 3.005 x 1.505 x 0.400 inches (76.33 x 38.23 x 10.16 mm)

See Figures 16 and 17

Weight:

100 grams maximum

Screening: Space Standard, Class H or Class K (MIL-PRF-38534)

Radiation hardness levels O or R

DESCRIPTION

INHIBIT

The SMFLHP Series™ 28 volt DC/DC converters are rated up to

100 watts output power over a –55° to +125°C temperature range

with a 28 Vdc nominal input. On dual output models, up to 70% of

the rated output power can be drawn from either the positive or

negative outputs. Current sharing allows the units to be paralleled

for total power of up to 270 watts. The welded, hermetically sealed

package is only 3.005 x 1.505 x 0.400 inches, giving the series an

overall power density of up to 67 watts per cubic inch.

The SMFLHP Series converters have two TTL compatible inhibit

terminals (INH1 and INH2) that can be used to disable power

conversion, resulting in a very low quiescent input current. An open

collector TTL compatible low (<0.8 volts) is required between INH1

(pin 4) and Input Common (pin 2) to inhibit the converter. An open

collector TTL compatible low (<0.5 volts) is required between INH2

(pin 12) and Output Common (pin 8) to inhibit the converter. The

application of intermediate voltages to these pins (1.5 to 10.5 volts)

should be avoided.

SCREENING AND REPORTS

SMFLHP converters offer three screening options (Space Standard,

Class H, or Class K) and two levels of radiation hardness (O and R).

Detailed reports on product performanace are also available.

CURRENT SHARING AND PARALLEL OPERATION

Multiple SMFLHP converters may be used in parallel to drive a

common load (see Figure 2). In this mode of operation the load

current is shared by two or three SMFLHP converters. In current

sharing mode, one SMFLHP converter is designated as a master.

The SLAVE pin (pin 11) of the master is left unconnected and the

MSTR/INH2 pin (pin 12) of the master is connected to the SLAVE

pin (pin 11) of the slave units. The units designated as slaves have

the MSTR/INH2 pin (pin 12) connected to the SNS RTN pin (pin 9).

Figure 2 shows the typical setup for two or three units in parallel.

Note that synchronizing the units together (though shown in the

figure) is not required for current sharing operation. A second slave

unit may be placed in parallel with a master and slave; this requires

the TRI pin (pin 3) of the master unit to be connected to the SNS

RTN pin (pin 9).

DESIGN FEATURES

The SMFLHP Series converters are switching regulators that use a

quasi-square wave, single ended forward converter design with a

constant switching frequency of 600 kHz.

Isolation between input and output circuits is provided with a trans-

former in the forward path and wide bandwidth magnetic coupling in

the feedback control loop. The SMFLHP Series uses a unique dual

loop feedback technique that controls output current with an inner

feedback loop and output voltage with a cascaded voltage mode

feedback loop.

When paralleled, 90% of the total combined power ratings of the

SMFLHP converters are available at the load. Overload and short

circuit performance are not adversely affected during parallel

operation.

The additional secondary current mode feedback loop improves

transient response in a manner similar to primary current mode

control and allows for ease of paralleling.

Tight load regulation is achieved through

a wide-bandwidth

magnetic feedback circuit. The output voltage on single SMFLHP

models can be easily trimmed by adding an external resistor. (See

Figure 1 for voltage changes with different resistor values.)

12 3 4 5 6 7...10

中文翻译

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与SMFLHP2815D/R相关器件

型号	品牌	获取价格	描述	数据表
SMFLHP2815S	CRANE	获取价格	Parallel operation with current share, up to 3 units (228 watts)
SMFLHP2815S/KR	CRANE	获取价格	DC/DC CONVERTERS 28 VOLT INPUT
SMFLHP2815S/O	CRANE	获取价格	Analog Circuit, Hybrid,
SMFLHP2815S/OO	CRANE	获取价格	Analog Circuit,
SMFLHP283R3S	CRANE	获取价格	Parallel operation with current share, up to 3 units (228 watts)
SMFLHP283R3S/KR	CRANE	获取价格	DC/DC CONVERTERS 28 VOLT INPUT
SMFN002	SAMSUNG	获取价格	Flash Card, 2MX8, 45ns,
SMFR-29C516E-31	MICROCHIP	获取价格	Error Detection And Correction Circuit, CMOS Series, 16-Bit, True Output, CMOS, PQFP100
SMFR-29C516E-31	ATMEL	获取价格	Error Detection And Correction Circuit, CMOS Series, 16-Bit, True Output, CMOS, PQFP100, L
SMFR-29C516E-31	TEMIC	获取价格	Error Detection And Correction Circuit, CMOS Series, 16-Bit, CMOS, PQFP100, MQFP-100

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