The 53278 is a military SPST, solid-state relay. It is a lightweight device resistant to damage from shock and vibration, and
immune to contact-related problems (contamination, arcing) associated with mechanical equivalents.
Transformer coupling between the input and output stages provides effective isolation up to 1000 V RMS. The Power FET
output eliminates bipolar offset and minimizes output voltage drop.
The preferred control input is CMOS compatible operating from a bias supply of 4.5 to 5.5VDC. (See Figure 1)
Integral short-circuit protection, I
2
T trip and status output is provided. This unit is Pin configurable for 1A or 2A output. The
output current flow is sensed while under load or while switching, and responds to an over-current with an I
2
T trip curve by
opening the output. An open-collector Status is available to indicate the switch state. The output will remain blocked
indefinitely until the short is removed and the unit reset. This feature prevents damage to the controller and also averts
further system failures that may be caused by the short circuit. Output Status is On (High) when the output is switched on
and is Off (Low) whenever the output is commanded off or tripped. Resetting the unit is accomplished by recycling the input
control.
This device is available in a variety of quality levels from COTS to class K including any custom screening requirements and
all components have radiation-hardened equivalents. The basic data sheet part is environmentally screened to H level in
accordance with Table C-IX of MIL-PRF-38534 with no element evaluation or QCI.
ABSOLUTE MAXIMUM RATINGS
1
Isolation voltage .......................................................................................................................................................1000 V RMS
2
Continuous operating output voltage ..............................................................................................................................50 VDC
Load Current ....................................................................................................................................................18A / Self Limiting
Bias supply voltage, V
DD
...................................................................................................................................... 4.5 to 5.5 VDC
Operating temperature ............................................................................................................................ -55ºC to +125ºC Case
Storage temperature ..........................................................................................................................................-55ºC to +125ºC
Notes:
1
2
60 Hz sine wave
Reversing polarity on the output may cause permanent damage
Micropac Industries
cannot assume any responsibility for any circuits shown or represent that they are free from patent infringement.
Micropac
reserves the right to make changes at any time in order to improve design and to supply the best product possible.
MICROPAC INDUSTRIES, INC. MICROCIRCUITS PRODUCTS DIVISION
•
905 E. Walnut St., Garland, TX 75040
•
(972) 272-3571
•
Fax (972) 494-2281
www.micropac.com
E-MAIL:
microsales@micropac.com
2/24/04 Rev. D
Pg. 1 of 7
53278
28V HIGH SIDE LATCHING SOLID-STATE POWER CONTROLLER
ELECTRICAL CHARACTERISTICS
T
A
= +25° C
PARAMETER
Input characteristics
CMOS configurations (Figure 1)
Bias supply range, V
DD
Bias current
Input current
Control voltage range
Turn-on voltage
Turn-off voltage
Dielectric strength
At V
DD
= 5.0V
At V
DD
= 5.0V
60 Hz
0.5
1000
5 VDC Input
-0.5
2.8
2.0
3.3
5
5.5
10
500
5.5
3.2
VDC
mA
µ
A
TEST CONDITIONS
MIN
TYP
MAX
UNITS
VDC
VDC
VDC
V RMS
Bus Return Bias Current:
Output characteristics
Output current, sustaining:
Continuous blocking voltage
On-state resistance, R
ds
(1A Configuration)
On-state resistance, R
ds
(2A Configuration)
Turn-on time @ 25ºC case
Turn-off time @ 25ºC case
Off-state leakage
Output Capacitance
Load Start current
Short-circuit peak
Trip Reset Time
Status Output Specification
Status Supply Voltage (open Collector)
Status off leakage current
Status off leakage current
Status on voltage
High-To-Low Transition Time
Junction temperature
Thermal resistance,
θ
JA
θ
JC
28V
Bus Voltage
Steady state load
25ºC Case
25ºC Case
Figure 2
Figure 2
At Maximum Blocking Voltage
25ºC
Remove short / overload
& Cycle input
6/12
50
5.0
VS = 30 VDC
VS = 15 VDC
I
STATUS
= 5 MA
I
STATUS
= 5 MA
1.2 / 2.4
10
20
2.4 / 4.8
50
mA
A
VDC
Ohms
Ohms
mS
mS
µ
A
0.075
0.050
0.8
0.5
40
7.5/15
0.1
0.075
2.0
1.0
100
700
9/18
100
pF
A
A
mS
32
100
4
0.4
20
50
150
30
5
VDC
µADC
µADC
VDC
µS
ºC
ºC/W
ºC/W
APPLICATION NOTES:
1. Maximum input switching frequency not to exceed 20 Hz under normal conditions, or 1 Hz if output is shorted.
2. Input transitions should be <1 ms and duration and input source should be “bounceless contact” type.
3. Inductive loads must be suppressed.
4. Peak current that may flow when output is shorted.
Micropac Industries
cannot assume any responsibility for any circuits shown or represent that they are free from patent infringement.
Micropac
reserves the right to make changes at any time in order to improve design and to supply the best product possible.
MICROPAC INDUSTRIES, INC. MICROCIRCUITS PRODUCTS DIVISION
•
905 E. Walnut St., Garland, TX 75040
•
(972) 272-3571
•
Fax (972) 494-2281
www.micropac.com
E-MAIL:
microsales@micropac.com
2/24/04 Rev. D
Pg. 2 of 7
53278
28V HIGH SIDE LATCHING SOLID-STATE POWER CONTROLLER
Figure 1 Typical Connection Diagram
1 ms
CONTROL
10%
MAX
90%
90%
10%
t
ON
90%
LOAD VOLTAGE
10%
10%
t
OFF
Figure 2 Switching Characteristics
Micropac Industries
cannot assume any responsibility for any circuits shown or represent that they are free from patent infringement.
Micropac
reserves the right to make changes at any time in order to improve design and to supply the best product possible.
MICROPAC INDUSTRIES, INC. MICROCIRCUITS PRODUCTS DIVISION
•
905 E. Walnut St., Garland, TX 75040
•
(972) 272-3571
•
Fax (972) 494-2281
www.micropac.com
E-MAIL:
microsales@micropac.com
2/24/04 Rev. D
Pg. 3 of 7
53278
VDD
28V HIGH SIDE LATCHING SOLID-STATE POWER CONTROLLER
CONTROL
OFF
ON
ON
SIMULATED
SHORT
OFF
3A
I
OUT
OUTPUT STATUS
OFF
ON
(OPEN)
Figure 3 - TIMING DIAGRAM
Note 1: A turn-off into a short produces an increase in current to the initial I
2
T must trip value.
Note 2: Shorted while On from any On operating condition can have a several
µs
surge current of as much as
100A.
Note 3: Loss of and re-application of Bus power will result in a re-start (output open & Fault Status low.)
Note 4: Output Status signal assumes a pull-up voltage is always present to produce a “1” when status is open.
Micropac Industries
cannot assume any responsibility for any circuits shown or represent that they are free from patent infringement.
Micropac
reserves the right to make changes at any time in order to improve design and to supply the best product possible.
MICROPAC INDUSTRIES, INC. MICROCIRCUITS PRODUCTS DIVISION
•
905 E. Walnut St., Garland, TX 75040
•
(972) 272-3571
•
Fax (972) 494-2281
www.micropac.com
E-MAIL:
microsales@micropac.com
2/24/04 Rev. D
Pg. 4 of 7
53278
28V HIGH SIDE LATCHING SOLID-STATE POWER CONTROLLER
Truth Table – Power Sequencing
Bus Voltage
0
On
0
On
On
V
DD
Control
I Out
Output
Status
Short
0
X
Open
Open “1”
X
0
X
Open
Open “1”
X
(Note 1)
On
X
Open
0
X
(Note 1,2)
0
Open
0
Off
(Note 3)
Off
(Note 3,4)
Off
(Note 5)
X
X
1
Open “1”
Off
(Note 5)
0
Truth Table – Short circuit and Status
Turn on into Short Sequence
Control
I out
Output
Status
Shorted
Output
0
Off
0
Shorted
1
Off
0
Shorted
1
Off
0
X
0
Off
0
Off
1
On
Open “1”
Off
1
On
Open “1”
Off
Short while on Sequence
1
Off
0
On
1
Off
0
X
0
Off
0
X
1
On
Open “1”
Off
Note 1: Unit Powers up in the Off condition with application of either Bus power or V
DD
.
Note 2: Fault Status reports only when V
DD
is present.
Note 3: Control “0” Off must be invoked upon simultaneous applications of 5V and Bus Power for an unambiguous output
and fault status.
Note 4: An Off Control to On Control transition is required to first turn the Unit On.
Note 5: Loss of V
DD
will not change output state during normal operation.
Note 6: Truth Table-Power sequencing: Output Status open collector pull-up resistor is assigned a separate and always
present voltage, producing a “1” when “Open”.
Micropac Industries
cannot assume any responsibility for any circuits shown or represent that they are free from patent infringement.
Micropac
reserves the right to make changes at any time in order to improve design and to supply the best product possible.
MICROPAC INDUSTRIES, INC. MICROCIRCUITS PRODUCTS DIVISION
目前医疗监护中无法动态掌握患者信息，一旦患者病情恶化，无法在第一时间实施抢救，对数据信息维护效率低。 文中首先阐述了蓝牙技术及其在医疗监护中应用的可行性，然后设计了系统框架，给出了具体功能，BlueTooth Wireless Communication Technology Application in Medical Monitoring包括数据采集和语音报警，最后对蓝牙信号在传输...[详细]
Yamaha Motor Group旗下的i-PULSE有限公司日前已与华尔莱科技（Valor）结为合作伙伴关系，基于Valor的vPlan生产规划工具向i-PULSE组装设备的使用者提供完整的从设计到制造的NPI解决方案。在近期日本东京举办的Protec展会（6/11-6/13）上，i-PULSE首度展出了该新产品并将直接向其客户进行销售。 新产品的名称为“iPlan”，它将提供一系...[详细]
2008年8月26-29日，华南地区的五大品牌工业展会——NEPCON / EMT 华南展（第十四届华南国际电子生产设备暨微电子工业展/华南国际电子制造技术展览会）、华南国际汽车电子展（AE South China）、华南国际工业组装技术与装备展览会（ATE South China）和华南国际平面显示器制造技术展（Finetech South China）将在深圳会展中心隆重举行。从组委会获...[详细]
传感器
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
