SEMITEC Konstantstromdiode (CRD) Anwendungsreferenzhandbuch

Artikel Details

Current Regulating Diodes (CRD hereunder) are diodes that maintain a constant current flow despite voltage fluctuations. CRDs supply constant current over a wide range of voltage from sub 1V to 100V. Constant current is supplied, regardless of fluctuations in voltage applied, load resistance changes and ripple voltage. Creating a constant current circuit generally involves multiple components, but with SEMITEC CRDs only one part is required to accomplish the same function.CRDs offers a compact and reliable solution for keeping the current constant..SEMITEC'S CRDs are fully compliant with RoHS DIRECTIVE2011/65/EU.Bomkey Electronics is the authorized distributor of SEMITEC CRD constant current diodes from Japan. Contact us for details!

The CRD E series products come in the DO-35 style package with DHD (double heat sink diode) construction. – Hermetically sealed, high reliability package – Suitable for mass production due to lower cost materials – Compact device offered in the DO-35 (300 mW) package 18mA CRD (E-183) With the addition of an 18mA CRD to our product lineup (up from 15mA), it is now possible to supply constant current to 20mA high brightness LEDs for luminance stabilization.

TheCRD S series products are surface mount devices that come in resin-sealed SMD package. Our products have about the same height as the latest low profile LEDs so that when mounted next to each other,the light will not be blocked off New (12/2015): 22 mA CRD We have added a 22 mA CRD (S-223T) to our product lineup in order to accommodate high luminance LEDs. This has become necessary since in the case of high luminance LEDs often two CRDs had to be used. With our new 22 mA (223T) product it is again possible to use just one product for current stabilization.

Applications

・Constant current source for LED brightness stabilization

・LED street lights, LED fluorescent lamps, LED light bulbs, LED downlights
・Constant voltage circuit for supplying constant current to Zener diodes
・Constant current source for proximity sensors and other sensors
・Battery charge / discharge circuits
・Electrolytic capacitor aging equipment
・Constant current test equipment for various semiconductor devices
・Telecommunications line interface
・Earth leakage circuit breakers
・Current source for piezoelectric actuators
・Stabilized power supply circuits

Dimensions

Specifications

General

	E series	S series
Rated power	300 mW	500 mW
Rated voltage (pulse wave)	100 V (E-101 to E-562)	100 V (S-101 to S-562)
	50 V (E-822 to E183)	50 V (S-822 to S-223)
Allowable reverse current	50 mA
Junction temperature	150 ℃
Operating temperature range	- 30 to 150 ℃	- 40 to 150 ℃

Recommended maximum voltage

Product number	Voltage	Product number	Voltage
E-101 to E-562	100	S-101 to S-562	100
E-822	30	S-822T to S-223T	50
E-103
E-123
E-153	25
E-183

Product number		Pinch-off current (10 V)1		Limiting current1		Limiting current ratio I100V/Ip*I30V/Ip	Temperature coefficient (% / ℃)2
SMD	Leaded	Ip (mA) typical	Min - max	Vk (V)	Ik (mA)
S-101T	E-101	0.10	0.05 - 0.21	0.5	0.8 lpmin.	1.1 max	+ 2.10 to + 0.10
S-301T	E-301	0.30	0.20 - 0.4	0.8			+ 0.40 to - 0.20
S-501T	E-501	0.50	0.40 - 0.6	1.1			+ 0.15 to - 0.25
S-701T	E-701	0.70	0.60 - 0.9	1.4			0.00 to - 0.32
S-102T	E-102	1.00	0.88 - 1.3	1.7			- 0.10 to - 0.37
S-152T	E-152	1.50	1.28 - 1.7	2.0			- 0.13 to - 0.40
S-202T	E-202	2.00	1.68 - 2.3	2.3			- 0.15 to - 0.42
S-272T	E-272	2.70	2.28 - 3.1	2.7			- 0.18 to - 0.45
S-352T	E-352	3.50	3.00 - 4.1	3.2			- 0.20 to - 0.47
S-452T	E-452	4.50	3.90 - 5.1	3.7			- 0.22 to - 0.50
S-562T	E-562	5.60	5.00 - 6.5	4.5			- 0.25 to - 0.53
S-822T	E-822	8.20	6.56 - 9.8	3.1		1.0 max (I30/Ip)	- 0.25 to - 0.45
S-103T	E-103	10.0	8.00 - 12.4	3.5			- 0.25 to - 0.45
S-123T	E-123	12.0	9.60 - 14.4	3.8			- 0.25 to - 0.45
S-153T	E-153	15.0	12.0 - 18.0	4.3			- 0.25 to - 0.45
S-183T	E-183	18.0	16.0 - 20.0	4.6			- 0.25 to - 0.45
S-223T		22.5	20.0 - 25.0	5.3			- 0.25 to - 0.45
1: Pinch-off current and limiting current are measured by pulse wave at 25 ℃ environment temperature 2: Temperature coefficient is calculated from measurements at 25 and 50 ℃.

Solution application

CRD Solution application 2

CRD Solution application 3

SEMITEC CRD DATASHEET(EN)

SEMITEC CRD DATASHEET(JP+Solution application)

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S-562T Spezifikationen

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Menge	Einzelpreis	Gesamtpreis
10+	$0.250000	$2.500000
100+	$0.230000	$23.000000
500+	$0.235000	$117.500000
1000+	$0.220000	$220.000000
3000+	$0.200000	$600.000000
6000+	$0.190000	$1140.000000
9000+	$0.180000	$1620.000000