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Technical content

Features

  • Simplest 0-10 V design on the market. CDM10V comes with default settings: - 5% minimum duty cycle - 1kHz PWM frequency - 200 μ A Dimmer/Resistor Bias current - Dim-To-Off disabled
  • The simple one time programmable option allows setting in a wide range: - Minimum duty cycle: 1%, 2%, 5%, 10% - PWM output frequency: 200Hz, 500Hz, 1kHz, 2kHz - Dimmer/Resistor Bias Current: 50 μ A, 100μ A, 200μ A, 500μ A - Dim-to-Off: disabled/enabled
  • Wide input V cc range from 11 to 25 V
  • Transparent PWM mode (PWM Bypass Mode in DIM-TO-OFF enabled mode)
  • Replaces many external components with a single chip reducing BOM and PCB space
  • Minimum variation from device to device

Applications

  • LED Drivers needing 0-10 V Dimming Circuits
  • Industrial and Commercial Dimmable Applications: Luminaires, Troffers, Downlights, Sconces, Undercabinet, Office Lighting, Signage applications, Dali applications Product Type Package CDM10V SOT-23-6

Description

CDM10V is a fully integrated 0-10 V dimming interface IC and comes in a SOT-23-6 package to cover space requirements on small PCBs. The device is targeted for various dimming applications in lighting. The IC can be used to transmit analog voltage based signals from a 0-10 V dimmer or potentiometer to the dimming or PWM input of a lighting controller IC in the form of a 5 mA current based PWM signal to drive an external opto-coupler. It replaces many components in a traditional solution and reduces BOM and PCB space significantly. The CDM10V IC outputs a 0 - 100% PWM current signal at programmable frequency with an amplitude value of 5 mA. The duty cycle of the PWM signal can be limited to a dedicated minimum value. Dim-to-off feature is supported as well and can be enabled on demand. Embedded digital signal processing maintains minimum variations from device to device. Please read the Important Notice and Warnings at the end of this document v 1.2 www.infineon.com 2016-08-01

Flexible 0-10V Dimming Solution Table of Contents 2 v 1.2 2016-08-01

Flexible 0-10V Dimming Solution List of Tables 3 v 1.2 2016-08-01

1 Block Diagram

Figure 1 Block Diagram of the CDM10V

2 Pin Configuration

1 VCC Input voltage 11V - 25V

2 GND GND

3 Iout PWM output current 5mA

4 RxD RxD for eFuse programming, connect to GND for normal operation

5 VFSS Fusing voltage (4,1V) eFuse programming, connect to GND for

normal operation (internal pull-down)

6 Rdim+ Dimmer current output /Voltage sense

Flexible 0-10V Dimming Solution Block Diagram 5 v 1.2 2016-08-01

3 Functional Description

Typical Application Circuit Figure 2 Typical Application Circuit Recommended cooling area In order to guarantee the full functionality of the CDM10V device, the required cooling area has to be selected according to the graph in Figure 3. CDM10V Flexible 0-10V Dimming Solution Functional Description 6 v 1.2 2016-08-01

Figure 3 Cooling area over ambient temperature CDM10V CDM10V Flexible 0-10V Dimming Solution Functional Description 7 v 1.2 2016-08-01

Table 2 PWM Output current referring to R dim+-Pin Voltage Rdim+ Iout <1 V PWM @ min duty cycle or Dim-to-OFF 1 - 9 V min duty cycle (@ 1V)…100% (@ 9V) >9V (max. applicable Voltage: Vcc) Always active Calculation of the lower dimming voltage boundary for entering min duty cycle: Figure 4 Dimming Characteristic CDM10V Flexible 0-10V Dimming Solution Functional Description 8 v 1.2 2016-08-01

Figure 6 I out resolution versus the Rdim+ frequency CDM10V Flexible 0-10V Dimming Solution Functional Description 10 v 1.2 2016-08-01

As said before, the 4-pin coupler with phototransistor can be seen as a current-controlled current source and CDM10V is driving a current of 5 mA, resulting in a collector current (= emitter current) ranging from 2.5 mA to 30 mA for a non-selected coupler. With a 100 Ω load resistor the output signal thus would vary from 250 mV to 3V. This leads to the conclusion that small load resistance is desirable for good switching behavior but leads to small output signal and this signal varies too much with CTR instead of having a constant amplitude as requested initially. A solution for achieving constant amplitude could be to make the load resistance big enough that the transistor would go into saturation. The voltage drop across a BJT in saturation is small and doesn’t vary much with temperature but switching speed is very poor in this condition. Figure 9 Simplified schematic showing second order filter and best configuration of coupler All of the above put together results in a set of simple rules of optocoupler selection: 1. Use the lowest PWM frequency that gives reasonable dimming response. Example: With fPWM = 1kHz a second order filter with a corner frequency of 100 Hz should be used. The response time of this filter to a step from 10% to 90% dimming level is about 10 ms and after 20 ms the final level is reached. 2. Use an optocoupler with a selected CTR range like e.g. 100% to 200%. 3. Use a load resistance that allows the desired output voltage even with lowest CTR over all possible operating conditions. Example: CTRmin = 80 %, VOut = 5 V, ILED, max= 4.5 mA 4. To prevent saturated switching, use a supply voltage VCC that is at least 2V higher than the desired output voltage VOut. VCC shouldn’t be too high on the other hand to limit power losses. Example: VCC = 15 V, CTRmax = 200 %, ILED,max = 5.45 mA, Dimm-Level 100 % Obviously with a VCC of 7.5 V these losses would be halved to about 90 mW. It's important to keep in mind, that this is the maximum loss that only occurs at maximum light output. At minimum dimming level or dim- to-off the loss added by the optocoupler circuit will be negligible. 5. Use a Zener diode to limit and stabilize the output voltage to the desired value. In the above example a 5.1 V Zener with 2% accuracy should be used. CDM10V Flexible 0-10V Dimming Solution Functional Description 13 v 1.2 2016-08-01

A circuit that complies with all the above is shown in Figure 9. An optocoupler device that complies with the above mentioned rules and has actually been tested in the application is VO617A-2 by Vishay Semiconductor. There are of course many devices available that have very similar, if not identical, technical data regarding switching times vs. load resistance and CTR selection. As an example devices as FOD817A, HCPL-817-xxAE or L TV-817A, EL817A or TLP183 GRL, to name only a few, can be used in this application. Nevertheless the desired performance has to be verified in the application in each single case. CDM10V Flexible 0-10V Dimming Solution Functional Description 14 v 1.2 2016-08-01

4 Electrical Characteristics and Parameters

Table 5 Absolute Maximum Ratings Pin Name Values Unit Note or Test ConditionMin. Max.

1 Vcc 11 25 V

2 GND 0 0 V Point of reference

3 Iout -0.5 3.63 V Depending on the optocupler voltage @ 5mA 4 RxD -0.25 0.1 V Connect to GND during operation 5 VFSS -0.25 0.1 V During operation Connect to GND 6 Rdim+ -0.5 VCC + 0.5 V Table 6 Electrical Characteristics Parameter Programmable Symbol Values Unit Note or Test ConditionMin. Typ. Max. Input Voltage Vin 11 25 V Operating Voltage Junction Temperature Range TJ -40 135 °C Ambient Temperature Range TA -40 105 °C Power Dissipation Ptot 6.05 @ 1% duty cycle; 6.6 @ 2% duty cycle; 8.25 @ 5% duty cycle; 11 @ 10% duty cycle 130 @ 100% duty cycle 83.2 @ 70% duty cycle 54 @ 50% duty cycle 30.4 @ 30% duty cycle 160 @ 100% PWM & 25 Vin mW Dimmer current included Current Consumption ICC 1 mA Current Consumption of the IC for self supply Output Current for Dimmer yes Idim -10% 50/100/200/500 +10% μ A Current flow out of Rdim+- Pin Output Current for Optocoupler Iout -10% 5 +10% mA PWM frequency yes fPWM -6% 200/500/ +6% Hz CDM10V Flexible 0-10V Dimming Solution Electrical Characteristics and Parameters 15 v 1.2 2016-08-01

Table 6 Electrical Characteristics (Continued) Parameter Programmable Symbol Values Unit Note or Test ConditionMin. Typ. Max. Min. duty cycle yes PWPWM -0.2 1/2/5/10 +0.2 % Percentage of the pulse width Dimming accuracy -3 +3 % With active dimming incl. all variations Fusing Voltage VFSS 4.0 4.1 4.2 V For eFuse programming, connect to GND for normal operation Wake-up Time tw 40 μ s Time from VCC = 11 V to first output current ESD capability HBM VHAB 1500 V according to ANSI/ESDA/ JEDEC JS-001-2012 ESD capability CDM VCDM 500 according to JESD22 C101 CDM10V Flexible 0-10V Dimming Solution Electrical Characteristics and Parameters 16 v 1.2 2016-08-01

5 Chip Configuration

Typical eFuse programming Circuit Figure 10 Typical eFuse programming Circuit Serial Port The serial port enables a one time reconfiguration of parameters for device function. Characteristics of the communication: Baudrate: 9600Bd; one stop bit; no parity bit Timing diagram: Data frame Startbit 8 Data bits Stopbit Figure 11 Timing diagram for the serial communication CDM10V Flexible 0-10V Dimming Solution Chip Configuration 17 v 1.2 2016-08-01

Data frame format: Figure 12 Data frame format for the Serial Communication Table 7 Bit setting for the one time reconfiguration Bit group Value Meaning Comment CMD 1 Always high reserved Dimmer/Resistor Bias 00 200 µA Default 01 100 µA 10 50 µA 11 500 µA Dim-to-Off 0 NOT ENABLED Default

1 Enable

PWM Frequency 00 1 kHz Default 01 500 Hz 10 200 Hz 11 2 kHz Minimum duty cycle 00 5 % Default 01 2 % 10 1 % 11 10 % CDM10V Flexible 0-10V Dimming Solution Chip Configuration 18 v 1.2 2016-08-01

6 Package Dimensions

All dimensions in mm. Package Drawings Figure 13 Package Drawings CDM10V Flexible 0-10V Dimming Solution Package Dimensions 19 v 1.2 2016-08-01

Flexible 0-10V Dimming Solution Package Dimensions 20 v 1.2 2016-08-01

∅ Reel: 180 Pieces / Reel: 3000 Reels / Box: 1 Figure 15 Packing

7 References

Additional support material can be found under the following link. Related Links http://www.infineon.com/CDM10V

Revision History

Major changes since previous revision v1.0 Initial Version v1.1 Typos, added Table 5 v1.2 Typos p 12, p 13 CDM10V Flexible 0-10V Dimming Solution References 21 v 1.2 2016-08-01

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© 2016 Infineon Technologies AG All Rights Reserved. Do you have a question about any aspect of this document? Email: erratum@infineon.com Document reference IFX-len1448356374413 IMPORTANT NOTICE The information given in this document shall in no event be regarded as a guarantee of conditions or characteristics (“Beschaffenheitsgarantie”) . With respect to any examples, hints or any typical values stated herein and/or any information regarding the application of the product, Infineon Technologies hereby disclaims any and all warranties and liabilities of any kind, including without limitation warranties of non-infringement of intellectual property rights of any third party. In addition, any information given in this document is subject to customer’s compliance with its obligations stated in this document and any applicable legal requirements, norms and standards concerning customer’s products and any use of the product of Infineon Technologies in customer’s applications. The data contained in this document is exclusively intended for technically trained staff. It is the responsibility of customer’s technical departments to evaluate the suitability of the product for the intended application and the completeness of the product information given in this document with respect to such application. Please note that this product is not qualified according to the AEC Q100 or AEC Q101 documents of the Automotive Electronics Council. WARNINGS Due to technical requirements products may contain dangerous substances. For information on the types in question please contact your nearest Infineon Technologies office. Except as otherwise explicitly approved by Infineon Technologies in a written document signed by authorized representatives of Infineon Technologies, Infineon Technologies’ products may not be used in any applications where a failure of the product or any consequences of the use thereof can reasonably be expected to result in personal injury