RCD-24-0.35/SMD/OF - RECOM

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REV:2/2010

RCD-24

EN-60950-1 Certified

UL-60950-1 Certified

(Vref Version Pending)

Constant

Current LED

Driver

●UL Certified Constant Current LED Driver

●Wide Input and Output Voltage Range

●Digital PWM and Analogue Voltage Dimming

●Short Circuit and Overtemperature Protected

●Pin, Wire or Open Frame SMD Versions

●IP67 rated for /W Version

●96% Efficiency

●3 year Warranty

Features

Regulated

Converters

Selection Guide

Input Voltage (absolute maximum) 40VDC max

Recommended Input Voltage 300mA-700mA 5V min. / 24V typ. / 36VDC max

1000mA-1200mA 6V min. / 24V typ. / 36VDC max

Input Filter Capacitor

Output Current Accuracy 300mA-700mA ±1% typ, ±3% max.

(Vin = 24DC) 1000mA-1200mA ±2% typ, ±5% max.

Internal Power Dissipation Worst case load of 5 LEDs 800mW max

Output Current Stability Vin=36V, Vout =1-9 LEDs ±1% max

Output Ripple and Noise (20MHz BW) 300mA-700mA 150mVp-p max

Vin=36V, Vout =1-9 LEDs 1000mA-1200mA 300mVp-p max

Temperature Coefficient -40°C~+85°C ambient ±0.015%/°C max

Maximum Capacitive Load 100μF

Operating Frequency 300mA-700mA 210kHz min/ 250kHz typ/ 280kHz max

1000mA-1200mA 350kHz min/ 450kHz typ/ 550kHz max

Efficiency at Full Load 96% max.

Short Circuit Protection Regulated at rated output current

continued on next page

Specifications

( typical at 25°C, nominal input voltage, rated output current unless otherwise specified )

Description

The RCD series is a step-down constant current source designed for driving high power white LEDs. Standard

output currents available are 300mA, 350mA, 500mA, 600mA, 700mA, 1000mA and 1200mA to make this

driver compatible with a wide range of LEDs applications. Despite its compact size, the RCD series is fully

featured with very high efficiency, wide input voltage range, high ambient operating temperature and two means

of dimming: PWM/digital control and analogue voltage dimming. Both dimming controls are independent and can

be combined. The driver is also designed to be as reliable as the LEDs it is driving, even at the full operating

temperature. Options include an IP67-rated wired version (/W), an open frame version with SMD pins (/SMD/OF)

and a version with built-in reference output voltage (/Vref) to power sensors or for easy analogue dimming.

Part Input Output Output Dimming Options Mounting

Number Range Current Voltage Control Style

(VDC) (mA) (Vmin-Vmax)

RCD-24-0.30(a)(b) 4.5-36V 0-300 2-35 Digital + Analogue Vref Pins, SMD or Wired

RCD-24-0.35(a)(b) 4.5-36V 0-350 2-35 Digital + Analogue Vref Pins, SMD or Wired

RCD-24-0.50(a)(b) 4.5-36V 0-500 2-35 Digital + Analogue Vref Pins, SMD or Wired

RCD-24-0.60(a)(b) 4.5-36V 0-600 2-35 Digital + Analogue Vref Pins, SMD or Wired

RCD-24-0.70(a)(b) 4.5-36V 0-700 2-35 Digital + Analogue Vref Pins, SMD or Wired

RCD-24-1.00(b) 6-36V 0-1000 3-33 Digital + Analogue Pins or Wired

RCD-24-1.20(b) 6-36V 0-1200 3-33 Digital + Analogue Pins or Wired

(a)(b) Standard is no suffix with PCB Pins.

(a) Add suffix /Vref for pinned or SMD versions with Vref output and analogue dimming

(a) Add suffix /SMD/OF for open frame version with SMD solderpins (/SMD/OF-R for Tape and Reel Packaging)

(b) Add suffix /W for wired version without dimming control (four wires)

(b) Add suffix /W/X1 for wired version with analogue dimming control (five wires)

(b) Add suffix /W/X2 for wired version with PWM dimming control (five wires)

(b) Add suffix /W/X3 for wired version with both analogue and PWM dimming controls (six wires)

(a) Add suffix /W/Vref for wired version with Vref output and analogue dimming (six wires)

Derating Graph

(Ambient Temperature)

Output Current (mA)

700

20 40 100

300

Ambient Temperature (°C)

080

-20

-40

Natural Convection

350

600

500

1000

1200

800

900

1100

Refer to Application Notes

RoHS

2002/95/EC

6/6 E224736

LIGHTLINE

DC/DC-Converter

with 3 year Warranty

RCD-24

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REV: 2/2010

Voltage Control (0-15V max)

Output Current

100%

1V 2V 3V 4V 15V

0.13V 4.5V

Analogue Input Voltage

10V

PWM Digital Control Signal

Output Current (LED appears dim)

50~

200Hz

Typ.

LIGHTLINE

DC/DC-Converter

RCD-24

Series

Specifications -Continued

Operating Temperature Range 300mA-350mA -40°C to +85°C

(free air convection) 500mA -40°C to +80°C

600mA -40°C to +75°C

700mA-1000mA -40°C to +71°C

1200mA -40°C to +65°C

Storage Temperature Range -55°C to +125°C

Overtemperature Shutdown Internal IC Temperature 150°C typ.

(Auto-restart after cool down) Temperature Hysteresis 20°C typ.

Maximum Case Temperature 100°C

Thermal Impedance Natural Convection 55°C/Watt

Case Material (Pinned or Wired Versions) Non Conductive Black Plastic

Potting Material (Pinned or Wired Versions) Epoxy (UL94-V0)

Dimensions Pinned/Wired 22.1 x 12.6 x 8.5mm

SMD 21.0 x 11.4 x 10mm

Weight Pinned/Wired 4.5g/6.8g

SMD 1.9g

Soldering Profile Pinned 265°C/10 sec. max

SMD 245°C/30 sec. max

Packing Quantities Pinned Versions 39pcs per Tube

(Refer to App Notes for Tube sizes) SMD Versions 21pcs per Tube

SMD Tape and Reel 500pcs per Reel

Wired Versions 5pcs per Bag

PWM Dimming and ON/OFF Control (Leave open if not used - do not tie to +Vin)

Remote ON/OFF DC/DC ON 300mA-700mA Open or 0V<Vr<0.6V

Threshold Voltages 1000mA-1200mA Open or 0V<Vr<0.8V

DC/DC OFF (Standby) 300mA-700mA 0.6<Vr<2.9V

1000mA-1200mA 1.4<Vr<2.2V

DC/DC OFF (Shutdown) 300mA-700mA 2.9V<Vr<6V

1000mA-1200mA 2.2V<Vr<15V

Remote Pin Drive Current Vr=5V 1mA max

Quiescent Input Current in Shutdown Mode Vin=36V 200μA max

Maximum PWM Frequency For ±1% Linear Operation 200Hz max.

Frequency Limit 2000Hz max.

Analogue Dimming Control (leave open if not used - do not tie to +Vin)

Input Voltage Limits Standard -0.3V - 15V

Vref Version -0.3V - 5V

Control Voltage Range Full On 0.13V ± 50mV

(see Graphs) Standard: Full Off 4.5V ± 50mV

Vref Version: Full Off 3.3V ± 50mV

Analogue Pin Drive Current Vc=5V 0.2mA max.

Vref Version Vref Voltage 3.3V± 70mV

Vref Output Current 5mA

Vref Output Short Circuit Current 18mA typ.

Environmental

Relative Humidity 5% to 95% RH, non-condensing

/W Versions IP67

Conducted Emissions (with filter, see note) EN55022 Class B

Radiated Emissions (all series except >700mA) EN55022 Class B

ESD (all series) EN61000-4-2 Class A

Radiated Immunity (all series) EN61000-4-3 Class A

Fast Transient (all series) EN61000-4-4 Class A

Conducted Immunity (all series) EN61000-4-6 Class A

MTBF (RCD-24-0.70, Nominal Vin, Full Load) +25°C 605 x 10³ hours

using MIL-HDBK 217F +71°C 516 x 10³ hours

Note: Requires an input filter to meet EN55022 Class B conducted emissions - see next page

Analogue Dimming

Digital Dimming

Output Current (LED appears bright)

PWM Digital Control Signal

050~

200Hz

Typ.

Combined PWM and Analogue Dimming

Max*

PWM Digital Control Signal

Output Current

* Max output current can also be set using Analogue input

Voltage Control (0-5V max)

Output Current

100%

1V 2V 3V 4V 5V

0.13V 3.3V

Vref Version Analogue Input Voltage

Standard Version:

Vref Version:

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REV:2/2010

RCD-24

LIGHTLINE

DC/DC-Converter

RCD-24

Series

Recommended Class B PCB Layout

for Pinned / SMD Versions

EMI Filter Suggestions

RCD-24-xxx

LED Driver

C1 =

2.2µF

Elect.

Low ESR

-Vin -LED

+LED

+Vin

C2*

RCD-24-0.30 - RCD-24-0.70

No dimming or PWM dimming:

L1 = 47μH

C2 = C3 = 10nF MLCC

Other caps not required

Analogue Dimming used:

L1 = 120μH

C2 = C7 = 10nF MLCC

Other caps not required

C1 C3

C7 LED-

LED+

Vin+

Vin-

C2*

Top View

Typical Characteristics

CLASS B

RCD-24-1.00 - RCD-24-1.20

L1 = 220μH

C2 = 10nF

C3 = C5 = 2.2nF

C4 = C6 = C7 = C8 = 100nF

All capacitors MLCC

C2* = optional 2μ2 MLCC only

if L1 starts to resonate with the

back ripple current.

RCD-24-xxx

LED Driver

-Vin -LED

+LED

+Vin

RCD-24-0.30 - RCD-24-0.70

C1=1μF MLCC

L1 = 22μH

RCD-24-1.00 - RCD-24-1.20

C1=2.2μF MLCC

L1 = 47μH

CLASS A

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REV:2/2010

LIGHTLINE

DC/DC-Converter

RCD-24

Series

RCD-24

+Vin

Manual

Dimming

Control

RCD-24-xxx/Vref

LED DIMMER for up to 10 white LEDs

GND

10K

1st LED

Last LED

VrefDim

Application Examples

+Vin

Analogue

Dim

RCD-24-0.70

PWM

Dim/

On/Off

Driving Two Strings of 350mA LEDs with one 700mA Driver using a current mirror

MULTIPLE LED DRIVER (up to 20 LEDS)

GND

0.5~1.0 Ohm

1st LED

Last LED

2x NPN

+Vin

Analogue

Dim

0-10VDC

RCD-24-xxx

On/Off

(Optional)

LED DRIVER with 0-10V Interface

GND

3k3

2k4 1st LED

Last LED

LED Temperature (°C)

Output Current

100%

50 60 70 80

25 90

+Vin

RCD-24-xxx/Vref

Automatic LED Overtemperature Protection

GND

PTC

Thermistor

1st LED

Last LED

Analog

Dimming

Thermally connected

Vref

*Typically, choose R so that R=Rptc @ 85°C and R>660 Ohm.

LED Temperature Monitoring

Typical Response Curve (PTC = 500 Ohm @ 70°C)

RGB Driver

Standard Application

+Vin

Ana.

Dimming

RCD-24-xxx

LED DIMMER with high frequency PWM control

GND

1st LED

Last LED

10kHz

TTL

PWM

RCD-24

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LIGHTLINE

DC/DC-Converter

RCD-24

Series

Package Style and Pinning

3rd angle

projection

Bottom View

Top View

2.54

1.90ø SMT Pad

6.6

3.380

2.54

17.8

21.00

1.8

1.0

11.42

7.6

1.9

Solderball

Pin after

Reflow

1.90

3.180

SMD Version

XX.X ± 0.5 mm

XX.XX ± 0.25 mm

XX.XXX ± 0.01 mm

Pin Connections RCD-24 SMD Series

Pin # Out Comments

1 +Vin DC Supply

2 Analogue Dimming Leave open if not used

3 PWM/ON/OFF Leave open if not used

(3 Vref Vref Version only)

4 GND Do not connect to -Vout

5 -Vout LED Cathode Connection

6 +Vout LED Anode Connection

Due to the compact size of the Open Frame version, a product code label is used instead of the whole part number.

The product code consists of RCD xxxx (where xxxx is the datecode) followed by an 8 digit reference code, e.g.

= RCD-24-0.35/SMD/OF, manufactured in Week 1 of 2010.

RCD 1001

80999186

Bottom View

Top View

7.62

2.54

1.00 ø+0.15/0

0.6

8.50

12.55

4.1

2.54

17.5

22.10

2.30

2.46

3rd angle

projection

XX.X ± 0.5 mm

XX.XX ± 0.25 mm

Pin Tolerance ± 0.1 mm

Pin Connections RCD-24 Series

Pin # Out Comments

1 +Vin DC Supply

2 Analogue Dimming Leave open if not used

3 PWM/ON/OFF Leave open if not used

(3 Vref Vref Version only)

4 GND Do not connect to -Vout

5 -Vout LED Cathode Connection

6 +Vout LED Anode Connection

Leave >1mm space arround case on PCB

for air circulation

Recommended Footprint Details

Pinned Version

The reference codes for standard parts are:

RCD-24-0.30/SMD/OF = 80999199

RCD-24-0.35/SMD/OF = 80999186

RCD-24-0.50/SMD/OF = 80999200

RCD-24-0.60/SMD/OF = 80999201

RCD-24-0.70/SMD/OF = 80999202

Other custom or semi-custom parts may have

different reference codes.

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REV: 2/2010

RCD-24

LIGHTLINE

DC/DC-Converter

RCD-24

Series

Package Style and Pinning

3rd angle

projection

Wire Connections RCD-24/W Series

Wire # Function Comments

1 (Red) +Vin DC Supply

4 (Black) GND Do not connect to -Vout

5 (Brown) -Vout LED Cathode Connection

6 (Yellow) +Vout LED Anode Connection

Wire length = 100mm + 10mm stripped & tinned = 110mm total

Wire outside diameter = 1.6mm

Wire core diameter = 0.75mm

Wire is UL/CSA listed/ 22AWG / 300V Rated

Wire Connections RCD-24/W/X Series

Wire # Function Comments

2 (Green) Ana Dimming /X1

3 (Blue) PWM Dimming /X2

2 + 3 (Green + Blue) Ana + PWM Dimming /X3

2 + 3 (Green + Yellow) Ana Dimming + Vref /Vref

Wire length = 100mm + 10mm stripped & tinned = 110mm total

Wire outside diameter = 1.6mm

Wire core diameter = 0.75mm

Wire is UL/CSA listed/ 22AWG / 300V Rated

Bottom View

/W/X1 Version

Bottom View

/W/X2 Version

Bottom View

/W/X3 Version

/W/Vref Version

7.6

17.5

7.6

17.5

7.6

17.5

Wired Versions

Bottom View

/W Version

7.6

17.5

Wired Versions are packed in bags - 5pcs per bag.