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Data Sheet

Würth Elektronik eiSos GmbH & Co. KG - REV 0.1

PRELIMINARY

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172946001

MagI³C Power Module Product Family

LDHM - LED Step Down High Current Module

A DESCRIPTION

The LDHM series of the MagI³C Power Modules

Family is a constant current Buck LED Driver

Module. The MagI³C LED driver module drives a

maximum load of 450 mA LED current and

comprises a fully integrated current driver with

passives all in one package. The MagI³C LED driver

module provides a ready-made solution that is both

highly efficient and it can be used for a variety of

single string LED lighting applications. It requires an

input voltage from 4.5 V to 60 V and provides a

preset LED current of 350 mA. The LED current is

adjustable from 300 mA to 450 mA by loading a

single external resistor. The energy efficiency is up

to 95 %.

The MagI³C LED driver module operates at a

constant switching frequency of 800 kHz for low

electromagnetic interference (EMI) and it is

designed according to the standard EN55015. The

module has a fast control loop to fine LED current

pulse which is dissolved by 256 PWM steps at

240 Hz to implement for general lighting. Protection

features include thermal shutdown, input under-

voltage lockout, LED open-circuit and short-circuit

protection. The MagI³C LED driver module is

designed as an industrial high power density

package with a low profile and a small outline

(TO263-7EP).

01P

263

B FEATURES

 Peak efficiency up to 95 %

 LED Current capability: 300 mA - 450 mA

 Wide input voltage range: 4.5 V - 60 V

 Drives 1 to 16 LEDs in series up to 60 V input

 Typical LED Current Accuracy ±3.5 %

 Switching Frequency fix at 800 kHz

 PWM Dimming

 High contrast ratio (min. PWM current < 16 µs)

 Integrated magnetics solution for ease of use

 Single exposed pad for best thermal performance

 Connectable in parallel for higher current operations

 Compatible with ceramic and Low ESR Capacitors

 Input under voltage lockout protection (UVLO)

 Temperature range: -40 °C - 125 °C

C APPLICATIONS

 Indoor lighting:

 Spot light

 Down light

 Outdoor lighting:

 Street light

 Security light

 Tunnel light

 Industrial lighting:

 High-bay light

 Low-bay light

D TYPICAL APPLICATION CIRCUIT

LED+

DIM GND VREF

IADJ

LED-

Module

Exposed Pad

(EP)

LED

High Power LED String

01S

LED

(mA)

IADJ

(Ω)

VREF

(kΩ)

300 350 450

499 SHORT SHORT

OPEN OPEN 10.5

Summary of content (21 pages)

PAGE 1
72946001 MagI³C Power Module Product Family LDHM - LED Step Down High Current Module A DESCRIPTION The LDHM series of the MagI³C Power Modules Family is a constant current Buck LED Driver Module. The MagI³C LED driver module drives a maximum load of 450 mA LED current and comprises a fully integrated current driver with passives all in one package.
PAGE 2
172946001 MagI³C Power Module Product Family LDHM - LED Step Down High Current Module E PACKAGE MARKING Exposed Pad (EP) on the back side, Connect to GND First row: Logo & Date code XYTTESDD WE201 1 2 3 4 5 6 7 LED+ LED+ DIM GND VREF IADJ LED- Second row: Product type 02P Top View TO263-7EP F PIN DESCRIPTION PIN # PIN SYMBOL 1 2 3 4 5 6 7 EP LED+ LED+ DIM GND VREF IADJ LEDEP G PIN DESCRIPTION Input power supply and anode connection of the LED string Input power supply and anode
PAGE 3
172946001 MagI³C Power Module Product Family LDHM - LED Step Down High Current Module I ABSOLUTE MAXIMUM RATINGS (1) Preventive Caution: Exceeding the listed absolute maximum ratings below may affect the device negatively and may cause permanent damage. Therefore operating ratings are conditions under which operation of the device is intended to be functional. All values are referenced to GND and to a free ambient operating temperature of TA=25 ± 5 °C unless otherwise specified.
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172946001 MagI³C Power Module Product Family LDHM - LED Step Down High Current Module L ELECTRICAL SPECIFICATIONS Limits in standard type are for TJ = 25 °C unless otherwise stated; limits in boldface type apply over the operating junction temperature range T J of -40 °C to 125 °C. Minimum and maximum limits are specified through test, design, or statistical correlation. Typical values represent the most likely parametric norm at T J = 25 °C, and are provided for reference purposes only.
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172946001 MagI³C Power Module Product Family LDHM - LED Step Down High Current Module M TYPICAL PERFORMANCE CURVES If not otherwise specified, the following conditions apply: VIN = 28 V; CIN = 2.2 µF 100 V X7R Ceramic capacitor for driving 5-13 power LEDs, ILED = 350 mA; Single LED forward voltage used is 3.
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172946001 MagI³C Power Module Product Family LDHM - LED Step Down High Current Module TYPICAL PERFORMANCE CURVES If not otherwise specified, the following conditions apply: VIN = 28 V; CIN = 2.2 µF 100 V X7R Ceramic capacitor for driving 5-13 power LEDs, ILED = 350 mA; Single LED forward voltage used is 3.
PAGE 7
172946001 MagI³C Power Module Product Family LDHM - LED Step Down High Current Module TYPICAL PERFORMANCE CURVES If not otherwise specified, the following conditions apply: VIN = 28 V; CIN = 2.2 µF 100 V X7R Ceramic capacitor for driving 5-13 power LEDs, ILED = 350 mA; Single LED forward voltage used is 3.
PAGE 8
172946001 MagI³C Power Module Product Family LDHM - LED Step Down High Current Module TYPICAL PERFORMANCE CURVES If not otherwise specified, the following conditions apply: VIN = 28 V; CIN = 2.2 µF 100 V X7R Ceramic capacitor for driving 5-13 power LEDs, ILED = 350 mA; Single LED forward voltage used is 3.2 V; TAMB = 25°C Ratio: LED Current over Dimming Duty Ratio: LED Current over Dimming Duty 1.
PAGE 9
172946001 MagI³C Power Module Product Family LDHM - LED Step Down High Current Module TYPICAL PERFORMANCE CURVES If not otherwise specified, the following conditions apply: VIN = 28 V; CIN = 2.2 µF 100 V X7R Ceramic capacitor for driving 5-13 power LEDs, ILED = 350 mA; Single LED forward voltage used is 3.
PAGE 10
172946001 MagI³C Power Module Product Family LDHM - LED Step Down High Current Module N CIRCUIT DESCRIPTION MagI³C 3+2 Steps to design the current driver application The next 5 simple steps will show how to select the external components to design your power application: 1. 2. 3. 4. 5. Program the LED driver module current Layout considerations EMI design considerations Optional: Dimming control Optional: Parallel operation 5. High Power LED String ILED VIN IIN LED+ Module LED- 3.
PAGE 11
172946001 MagI³C Power Module Product Family LDHM - LED Step Down High Current Module Minimum Switch On-Time The on-time of the internal switch should be no shorter than 400 ns. The number of LED (typical forward voltage at 3.2 V) to input voltage is constrained by that as shown in the following table. No. of LED Max. VIN(V) 1 10 2 20 3 30 4 40 5 50 6-16 60 Step 2. Layout consideration The overall performance of the LED driver module highly depends on the PCB layout.
PAGE 12
172946001 MagI³C Power Module Product Family LDHM - LED Step Down High Current Module Step 4. Dimming Control The DIM pin of the LED driver module is an input with internal pull-up that accepts logic signals for average LED current control. Applying a logic high (above 1.3 V) signal to the DIM pin or leaving the DIM pin open will enable the device. Applying a logic low signal (below 0.7 V) to the DIM pin will disable the switching activity of the device but maintain operation of the VCC regulator active.
PAGE 13
172946001 MagI³C Power Module Product Family LDHM - LED Step Down High Current Module BLOCK DIAGRAM Module 1.2V - O + DIM VCC VREF 3 kΩ IADJ GND Switch Control logic 4.5V to 60V High Power LED Array EP 47µH LEDVoltage Regulator 1 mF VCC VIN LED+ CIN 0.33 mF 10S Data Sheet Würth Elektronik eiSos GmbH & Co. KG - REV 0.
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172946001 MagI³C Power Module Product Family LDHM - LED Step Down High Current Module P PIN CONFIGURATION Exposed Pad (EP) 3 4 5 LED+ DIM GND VREF 6 7 IADJ 2 LED- 1 LED+ Connect to GND 07P Top View TO263-7EP Q DETAILED PIN DESCRIPTION PIN # PIN SYMBOL TYPE 1,2 LED+ PWR 3 DIM I 4 GND PWR 5 VREF I Internal voltage reference output. 6 IADJ I Fine tuning of the LED current by connecting a resistor between this pin and ground.
PAGE 15
172946001 MagI³C Power Module Product Family LDHM - LED Step Down High Current Module R APPLICATIONS The MagI³C LED driver module for constant current is easy-to-use for current solutions capable of driving up to a 450 mA load with exceptional power conversion efficiency. They are available in an innovative package that enhances thermal performance and allows for hand or machine soldering. Following application circuits show possible operating configurations.
PAGE 16
172946001 MagI³C Power Module Product Family LDHM - LED Step Down High Current Module S PHYSICAL DIMENSIONS (mm) 08P Heat Sink 09P recommended soldering pad solder past recommendation 150 µm Data Sheet Würth Elektronik eiSos GmbH & Co. KG - REV 0.
PAGE 17
2946001 MagI³C Power Module Product Family LDHM - LED Step Down High Current Module T Packaging T1 Reel (mm) 20P Data Sheet Würth Elektronik eiSos GmbH & Co. KG - REV 0.
PAGE 18
172946001 MagI³C Power Module Product Family LDHM - LED Step Down High Current Module T2 Tape (mm) 21P TO263-7EP 22P Data Sheet Würth Elektronik eiSos GmbH & Co. KG - REV 0.
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172946001 MagI³C Power Module Product Family LDHM - LED Step Down High Current Module U DOCUMENT HISTORY DOCUMENT HISTORY Revision 0.1 Date 13.02.2014 Description First draft Responsible Michael Berger Data Sheet Würth Elektronik eiSos GmbH & Co. KG - REV 0.
PAGE 20
172946001 MagI³C Power Module Product Family LDHM - LED Step Down High Current Module CAUTIONS AND WARNINGS The following conditions apply to all goods within the product series of MagI³C of Würth Elektronik eiSos GmbH & Co. KG: General: All recommendations according to the general technical specifications of the data-sheet have to be complied with. The disposal and operation of the product within ambient conditions which probably alloy or harm the component surface has to be avoided.
PAGE 21
172946001 MagI³C Power Module Product Family LDHM - LED Step Down High Current Module IMPORTANT NOTES The following conditions apply to all goods within the product range of Würth Elektronik eiSos GmbH & Co. KG: 1. General Customer Responsibility Some goods within the product range of Würth Elektronik eiSos GmbH & Co. KG contain statements regarding general suitability for certain application areas.