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SMHF2812SG/HR

更新时间： 2024-10-28 02:57:39

品牌	Logo	应用领域
CRANE		转换器输入元件
页数	文件大小	规格书
12页	213K
描述
DC/DC CONVERTERS 28 VOLT INPUT

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SMHF2812SG/HR 技术参数

生命周期：	Contact Manufacturer	包装说明：	,
Reach Compliance Code：	compliant	ECCN代码：	EAR99
风险等级：	5.74	模拟集成电路 - 其他类型：	DC-DC REGULATED POWER SUPPLY MODULE
最大输入电压：	40 V	最小输入电压：	16 V
标称输入电压：	28 V	JESD-30 代码：	R-MDFM-P8
JESD-609代码：	e4	功能数量：	1
输出次数：	1	端子数量：	8
最高工作温度：	125 °C	最低工作温度：	-55 °C
最大输出电压：	12.12 V	最小输出电压：	11.88 V
标称输出电压：	12 V	封装主体材料：	METAL
封装形状：	RECTANGULAR	封装形式：	FLANGE MOUNT
认证状态：	Not Qualified	筛选级别：	MIL-PRF-38534 Class H
表面贴装：	NO	温度等级：	MILITARY
端子面层：	GOLD	端子形式：	PIN/PEG
端子位置：	DUAL	总剂量：	100k Rad(Si) V
最大总功率输出：	15 W	微调/可调输出：	NO
Base Number Matches：	1

SMHF2812SG/HR 数据手册

FEATURES

• Fully qualified to Class H or K

• Radiation hardened

• –55° to +125°C operation

• 16 to 40 VDC input

SMHF SERIES

SINGLE AND DUAL

15 WATT

DC/DC CONVERTERS

28 VOLT NPUT

• Fully Isolated

• Red hard optocoupler feedback

• Fixed frequency, 550 kHz typical

• Topology – Single Ended Forward

• Transient protection 50 V/120 ms

• Inhibit function

• Sync function

• Indefinite short circuit protection

• Undervoltage lockout

MODELS

VDC OUTPUT

SINGLE

3.3

DUAL

Size (max.): Non flanged 1.460 x 1.130 x 0.330 (37.08 x 28.70 x 8.38 mm)

Flanged 2.005 x 1.130 x 0.330 (50.93 x 28.70 x 8.38 mm)

See Figures 21 through 24 for dimensions.

• Up to 84% efficiency

Weight:

30 grams maximum.

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

Radiation hardness levels O, L, and R

DESCRIPTION

step load transient is as low as 1.3% with a 150 msec recovery time.

Input ripple current is typically 35 mA p-p with output ripple voltage

typically 30 mV p-p .

The SMHF Series™ of 28 V DC/DC converters offers a wide input

voltage range of 16 to 40 volts and up to 15 watts of output power.

The units are capable of withstanding short term transients up to 50

volts. The package is a hermetically sealed, seam-welded metal

case. Flanged and non-flanged models are available.

INHIBIT FUNCTION

SMHF converters provide an inhibit terminal that can be used to

disable internal switching, resulting in no output and very low quies-

cent input current. The converter is inhibited when a TTL compatible

low (≤0.8 – output disabled) is applied to the inhibit pin. The unit is

enabled when the pin, which is internally connected to a pull-up

resistor, is left unconnected or is connected to an open-collector

gate. The open circuit output voltage associated with the inhibit pin

is 8.5 to 12 VDC. In the inhibit mode, a maximum of 12 mA must be

sunk from the inhibit pin at 28 VDC input.

SCREENING AND REPORTS

SMHF converters offer three screening options (Standard, Class H,

or Class K) and three levels of radiation hardness (O, L, and R). See

Tables 1, 2, and 3 for more information. Detailed reports on product

performance are also available and are listed in Table 4.

CONVERTER DESIGN

The SMHF converters are switching regulators that use a quasi-

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

switching frequency of 550 kHz. Isolation between input and output

circuits is provided with a transformer in the forward path and a

temperature compensated opto-coupler in the feedback control

loop. The opto-coupler is radiation hardened and is especially

selected for space applications.

SYNCHRONIZATION

A synchronization feature is included with the SMHF Series that

allows the user to match the switching frequency of the converter to

the frequency of the system clock. An external synchronization

feature is included that allows the user to adjust the nominally

550kHz operating frequency to any frequency within the range of

500 kHz to 600 kHz. This is initiated by applying a TTL compatible

input of the desired frequency to pin 5.

For the SMHF dual output models, cross regulation is maintained by

tightly coupled output magnetics. Up to 70% of the total output

power is available from either output, providing the opposite output

is simultaneously carrying 30% of the total output power. Predictable

current limit is accomplished by directly monitoring the output load

current and providing a constant current output above the overload

point.

SHORT CIRCUIT PROTECTION

SMHF Series converters provide short circuit protection by

restricting the output current to approximately 115% of the full load

output current. The output current is sensed in the secondary stage

to provide highly predictable and accurate current limiting, and to

eliminate foldback characteristics.

HIGHER POWER DENSITY

The SMHF Series offers a new standard of performance for small

size and high power density. At just 0.33 inch high and a total foot-

UNDERVOLTAGE LOCKOUT

Undervoltage lockout prevents the units from operating below

approximately 14 VDC input voltage to keep system current levels

smooth, especially during initialization or re-start operations.

print of 1.7 in , this low profile package offers a total power density

of up to 30 watts per cubic inch.

LOW NOISE, HIGH AUDIO REJECTION

The SMHF converters’ feed-forward compensation system provides

excellent dynamic response and noise rejection. Audio rejection is

typically 50 dB. Typical output voltage response for a 50% to 100%

12 3 4 5 6 7...12

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与SMHF2812SG/HR相关器件

型号	品牌	获取价格	描述	数据表
SMHF2812SG/KO	CRANE	获取价格	DC/DC CONVERTERS 28 VOLT INPUT
SMHF2812SG/KR	CRANE	获取价格	DC/DC CONVERTERS 28 VOLT INPUT
SMHF2812SG/OO	CRANE	获取价格	DC/DC CONVERTERS 28 VOLT INPUT
SMHF2812SG/OR	CRANE	获取价格	DC/DC CONVERTERS 28 VOLT INPUT
SMHF2812SG1/HO	CRANE	获取价格	DC/DC CONVERTERS 28 VOLT INPUT
SMHF2812SG1/HR	CRANE	获取价格	DC/DC CONVERTERS 28 VOLT INPUT
SMHF2812SG1/KO	CRANE	获取价格	DC/DC CONVERTERS 28 VOLT INPUT
SMHF2812SG1/KR	CRANE	获取价格	DC/DC CONVERTERS 28 VOLT INPUT
SMHF2812SG1/OO	CRANE	获取价格	DC/DC CONVERTERS 28 VOLT INPUT
SMHF2812SG1/OR	CRANE	获取价格	DC/DC CONVERTERS 28 VOLT INPUT

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