CDM10V [INFINEON]

CDM10V 是一个完全集成的 0-10V 调光接口 IC,采用6引脚 SOT 封装,可以满足小型 PCB 的空间要求。该装置适用于各种调光应用。该 IC 可用于将基于模拟电压的信号以基于电流的PWM信号形式从0-10V调光器或电位器传输到照明控制器IC的调光或PWM输入,以驱动外部光电耦合器。;
CDM10V
型号: CDM10V
厂家: Infineon    Infineon
描述:

CDM10V 是一个完全集成的 0-10V 调光接口 IC,采用6引脚 SOT 封装,可以满足小型 PCB 的空间要求。该装置适用于各种调光应用。该 IC 可用于将基于模拟电压的信号以基于电流的PWM信号形式从0-10V调光器或电位器传输到照明控制器IC的调光或PWM输入,以驱动外部光电耦合器。

PC 驱动 控制器 CD 光电 装置 电位器
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中文:  中文翻译
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CDM10V  
Flexible 0-10V Dimming Solution  
Features  
Simplest 0-10 V design on the market. CDM10V comes with default settings:  
-
-
-
-
5% minimum duty cycle  
1kHz PWM frequency  
200μA 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: 50μA, 100μA, 200μA, 500μA  
Dim-to-Off: disabled/enabled  
Wide input Vcc 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  
SOT23-6  
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  
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CDM10V  
Flexible 0-10V Dimming Solution  
Table of contents  
Table of contents  
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1  
Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1  
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1  
Table of contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2  
Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3  
Pin Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3  
Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4  
Electrical Characteristics and Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13  
Chip Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15  
Package Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17  
References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19  
Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19  
Trademarks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20  
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CDM10V  
Flexible 0-10V Dimming Solution  
Block Diagram  
1
Block Diagram  
Figure 1  
Block Diagram of the CDM10V  
2
Pin Configuration  
Table 1  
Pin configutation  
Pin  
1
Name  
VCC  
Function  
Input voltage 11V - 25V  
GND  
2
GND  
Iout  
3
PWM output current 5mA  
4
RxD  
VFSS  
RxD for eFuse programming, connect to GND for normal operation  
5
Fusing voltage (4,1V) eFuse programming, connect to GND for  
normal operation (internal pull-down)  
6
Rdim+  
Dimmer current output /Voltage sense  
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Flexible 0-10V Dimming Solution  
Functional Description  
3
Functional Description  
Typical Application Circuit  
Figure 2  
Typical Application Circuit  
Note:  
The Diode marked with * is for the protection of the Rdim+-Pin when active dimming is used. This is  
because the voltage on this Pin is not allowed to be higher than VCC+0.5V. It is advised to use a low  
leakage, low reverse current Schottky-Diode in order to not influence the dimming performance (e.g.  
MMSD301T1G).  
Note:  
The capacitor connected to the Rdim+-Pin reduces the amount of coupled noise to the dimming signal.  
The size of this capacitance should be in the range of 2.2 - 10 nF (typ. 4.7 nF), where a small capacitor  
allows steeper edges of the dimming signal, a larger capacitor enhances the noise reduction.  
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Flexible 0-10V Dimming Solution  
Functional Description  
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.  
Figure 3  
Cooling area over ambient temperature CDM10V  
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Flexible 0-10V Dimming Solution  
Functional Description  
Dimming Characteristic  
Table 2  
PWM Output current referring to Rdim+-Pin Voltage  
Rdim+  
Iout  
<1 V  
1 - 9 V  
PWM @ min duty cycle or Dim-to-OFF  
min duty cycle (@ 1V)…100% (@ 9V)  
Always active  
>9V (max. applicable Voltage: Vcc)  
Calculation of the lower dimming voltage boundary for entering min duty cycle:  
1 V + min Duty Cycle 8 V  
×
Figure 4  
Dimming Characteristic  
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Flexible 0-10V Dimming Solution  
Functional Description  
Transparent Mode  
CDM10V device can be configured for usage in transparent mode. In this mode the PWM signal on Rdim+ input  
will be provided directly to Iout  
.
Pre-condition to enable the transparent mode is to fuse the DIM2OFF bit to HIGH and PWM frequency to 2 kHz,  
PWM minimum duty cycle is not used in this mode and can stay in default configuration.  
Figure 5  
Table 3  
Transparent mode timing diagram  
Conditions for the transparent mode  
Condition  
RdimH  
Name  
Min  
9.3 V  
-0.5 V  
Nom  
Max  
VCC+0,5V  
0.5 V  
Rdim+High Value  
Rdim+Low Value  
IoutHigh Value  
RdimL  
IoutH  
IoutL  
tIO  
RIout * 5mA1  
0.0 V  
IoutLow Value  
Propagation delay  
Min puls width High  
Min puls width Low  
Rising edge time  
Falling edge time  
8.8 μs  
tH  
2.6 μs  
2.6 μs  
tL  
tR  
1.8 μs  
1.8 μs  
tF  
Note:  
1 RIout is the resistance connected between the Iout and the GND-PIN  
Image shows the maximum Iout resolution versus the Rdim+ frequency. The dependency can be calculated using  
following formula:  
I
resolution  
out  
fRdim  
=
100  
× 2 . 6 μs  
For 1% resolution we get:  
1
fRdim  
=
3 . 85 kHz  
100  
× 2 . 6 μs  
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Flexible 0-10V Dimming Solution  
Functional Description  
Figure 6  
Iout resolution versus the Rdim+ frequency  
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Flexible 0-10V Dimming Solution  
Functional Description  
Optocupler Selection Guide  
CDM10V converts an analog dimming signal into a PWM waveform. In the majority of applications the dimming  
signal needs to be isolated from the rest of the application and an optocoupler is used to implement either  
functional or reinforced isolation. Optocouplers are an excellent choice since they are very cost effective but  
nevertheless able to comply with virtually all safety standards.  
The most common and cost effective optocouplers are four-pin devices consisting of a LED and a photo-  
sensitive BJT. With four pin devices only collector and emitter of the BJT are connected to pins. This limits  
device performance, especially switching times, as will be discussed later. Six-pin devices having the base of the  
BJT as well connected to a pin are seen less oꢀen. With these six-pin devices bandwidth of the transmission can  
be improved if necessary. Finally there are high-speed digital couplers available that are designed for very high  
data rates and offer a buffered output with a nearly perfect PWM signal. While offering superior performance  
high speed couplers are considerably more expensive than simple LED-BJT couplers.  
Generating an Analog Signal from PWM  
Although the PWM signal itself can be used, either by implementing PWM dimming or using a dedicated SMPS  
controller that is able to extract the dimming information directly from the PWM waveform, in many  
applications a DC voltage that is proportional to the desired dimming level is needed. Fortunately it is easy to  
create an analog signal from PWM: a low pass filter with the right corner frequency will do the job.  
As a rule of thumb a corner frequency of fPWM/100 for a first order filter and fPWM/10 for second order filter  
should be used. With this selection ripple on the generated DC signal is around 150 mVpp at medium dimming  
levels and goes down to a few 10 mVpp at very low and high dimming levels. The first order filter will have a  
slower time response due to the low corner frequency. Consequently, if for some reason a fPWM lower than 1 kHz  
has to be used, as second order filter will give the better response. With a third order filter it is possible to  
achieve either negligible ripple on the DC voltage or superior response time.  
Since the generated DC voltage not only depends on the duty-cycle of the PWM signal but is directly  
proportional to its amplitude as well it is mandatory to stabilize the amplitude e.g. with a Zener-Diode.  
Image shows a simplified schematic with second order filter. According to the design guideline given above,  
good starting values for C1 and C2 would be:  
1
f
kHz  
C1  
=
C2  
=
150 nF  
×
PWm  
Note:  
Using the ICL8105 the capacitor connected to the UART/Dim-Pin is not allowed to exceed 1nF in order  
to provide proper UART communication if needed.  
Inverted / Non-Inverted Output  
Figure 7  
Simplified schematic of CDM10V with inverted (leꢀ) and non-inverted (right) output signal.  
Both are equivalent in terms of performance  
Optocouplers are most oꢀen used in the configuration shown on the leꢀ of Image i.e. the output signal is  
derived from the collector of the BJT and thus inverted compared to the input signal. An inverted signal is not  
favorable at all since it will result in an inverted dimming characteristic with the majority of controllers. An  
additional inverter stage could be used of course, resulting in the proper dimming curve. But there is a simpler  
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Flexible 0-10V Dimming Solution  
Functional Description  
solution as well since the four pin optocoupler can be viewed as current controlled current source if VCE of the  
BJT is sufficiently high. Consequently the load can be connected either to collector or emitter without  
significant change in parameters or performance. Therefore the configuration on the right of Image is favorable  
for most SMPS controllers.  
Optocoupler selection  
There are two parameters of an optocoupler that are most important for use with CDM10V: the current transfer  
ratio CTR and the switching times Tr and Tf.  
Image is a typical plot of Tr and Tf vs, RL taken from the data sheet of a widely used 4-pin optocoupler. Both  
parameters depend on the load resistance RL. But while Tr doesn’t vary too much and shows a moderate  
maximum for RL of few hundred ohms, Tf is constantly increasing with RL, reaching about 100 µs for RL around  
10 kΩ. These times are much longer than the minimum pulse length generated by CDM10V shown in table Table  
4. Consequently relative low values for RL around 100 Ω seem to be necessary in order to achieve reasonable  
switching times. But it’s important to mention, that switching times shown in Image are determined with  
saturated BJT (this means the load resistance limits the IC to a lower value than would be determined by LED  
current) and with non-saturated BJT switching times can be small, even with higher load resistance.  
Figure 8  
Typical optocoupler switching times vs. load resistance together with test circuit.  
Before discussing influence of load resistance on switching performance further, the second important  
parameter of the coupler, CTR, needs investigation.  
Table 4  
Shortest pulse length for different frequencies and minimum dimming levels of CDM10V  
Frequency  
Dim-to-off  
1.2 μs  
1%  
2%  
5%  
10%  
500 μs  
200 μs  
100 μs  
50 μs  
200 Hz  
500 Hz  
1 kHz  
50 μs  
20 μs  
10 μs  
5 μs  
100 μs  
40 μs  
20 μs  
10 μs  
250 μs  
100 μs  
50 μs  
25 μs  
7.84 μs  
3.92 μs  
1.96 μs  
2 kHz  
As the name implies, CTR is simply the ratio between the forward current IF of the LED and the resulting  
collector current IC of the phototransistor and usually expressed in percent. A CTR of 50% for example means  
that the collector current is 50% or half of the LED current. CTR is of course not constant but depends on the  
LED current as well as on temperature. For many optocouplers CTR is specified for a nominal current of 5mA but  
can have considerably higher CTR at higher currents while being much lower at currents below 5 mA. Since  
CDM10V drives a constant current of 5 mA it fits very well to the most common couplers on the market. For a  
given coupler the CTR shows wide variation from device to device, varying for example from 50% to 600% for a  
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CDM10V  
Flexible 0-10V Dimming Solution  
Functional Description  
widely used coupler. Therefore selections are available with a CTR variation of 1:2 ranging e.g. from 100% to  
200%.  
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 aꢀer 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  
V
out  
5 V  
0 . 8 × 4 . 5 mA  
RL  
=
=
1 . 388 kΩ  
CTR  
× I  
min LED, min  
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 %  
PLoss, max  
=
2 . 2  
×
5 . 45 mA  
×
15 V  
=
179 . 85 mW  
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.  
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Flexible 0-10V Dimming Solution  
Functional Description  
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.  
A circuit that complies with all the above is shown in Image. 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  
LTV-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.  
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Flexible 0-10V Dimming Solution  
Electrical Characteristics and Parameters  
4
Electrical Characteristics and Parameters  
Table 5  
Pin  
Absolute Maximum Ratings  
Name  
Values  
Unit  
Note or Test  
Condition  
Min.  
Max.  
1
2
3
Vcc  
11  
0
25  
0
V
V
V
GND  
Iout  
Point of reference  
-0.5  
3.63  
Depending on the  
optocupler voltage  
@ 5mA  
4
5
6
RxD  
-0.25  
-0.25  
-0.5  
0.1  
0.1  
V
V
V
Connect to GND  
during operation  
VFSS  
Rdim+  
During operation  
Connect to GND  
VCC + 0.5  
An applied voltage  
above max value  
leads to the  
destruction of the  
device. Also valid if  
VCC is 0 V.  
Absolute maximum ratings (Table 5) are defined as ratings which when being exceeded may lead to destruction  
of the integrated circuit. Exposure to absolute maximum rating conditions for extended periods may affect  
device reliability. Maximum ratings are absolute ratings; exceeding only one of these values may cause  
irreversible damage to the integrated circuit. These values are not tested during production test.  
Table 6  
Electrical Characteristics  
Programmable Symbol  
Parameter  
Values  
Typ.  
Unit Note or Test  
Condition  
Min.  
Max.  
Input Voltage  
Vin  
TJ  
11  
25  
V
Operating  
Voltage  
Junction  
Temperature Range  
-40  
-40  
135  
105  
°C  
°C  
Ambient  
Temperature Range  
TA  
Power Dissipation  
Ptot  
6.05 @ 1% 130 @ 100% 160 @ mW  
Dimmer  
current  
included  
duty cycle;  
duty cycle  
100%  
PWM  
& 25  
Vin  
6.6 @ 2%  
83.2 @ 70%  
duty cycle  
duty cycle;  
8.25 @ 5% 54 @ 50% duty  
duty cycle;  
cycle  
11 @ 10%  
duty cycle  
30.4 @ 30%  
duty cycle  
Current  
Consumption  
ICC  
1
mA  
Current  
Consumption  
of the IC for  
self supply  
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Flexible 0-10V Dimming Solution  
Electrical Characteristics and Parameters  
Table 6  
Electrical Characteristics (continued)  
Programmable Symbol  
Parameter  
Values  
Typ.  
Unit Note or Test  
Condition  
Min.  
Max.  
Output Current for  
Dimmer  
yes  
Idim  
-10%  
50/100/200/500 +10% μA  
Current flow  
out of Rdim+  
Pin  
-
Output Current for  
Optocoupler  
Iout  
-10%  
-6%  
5
+10% mA  
+6% Hz  
PWM frequency  
yes  
yes  
fPWM  
200/500/  
1000/2000  
Min. duty cycle  
PWPWM  
-0.2  
-3  
1/2/5/10  
+0.2  
+3  
%
%
V
Percentage of  
the pulse  
width  
Dimming accuracy  
Fusing Voltage  
With active  
dimming incl.  
all variations  
VFSS  
4.0  
4.1  
4.2  
For eFuse  
programming,  
connect to  
GND for  
normal  
operation  
Wake-up Time  
ESD capability HBM  
ESD capability CDM  
tw  
40  
μs Time from VCC  
= 11 V to first  
output current  
VHAB  
1500  
500  
V
according to  
ANSI/ESDA/  
JEDEC JS-001  
VCDM  
according to  
JESD22 C101  
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Flexible 0-10V Dimming Solution  
Chip Configuration  
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  
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Flexible 0-10V Dimming Solution  
Chip Configuration  
Data frame format:  
Figure 12 Data frame format for the Serial Communication  
Table 7  
Bit setting for the one time reconfiguration  
Bit group  
CMD  
Value  
1
Meaning  
Always high  
200 µA  
100 µA  
50 µA  
Comment  
reserved  
Default  
Dimmer/Resistor Bias  
00  
01  
10  
11  
0
500 µA  
NOT ENABLED  
Enable  
1 kHz  
Dim-to-Off  
Default  
Default  
1
PWM Frequency  
00  
01  
10  
11  
00  
01  
10  
11  
500 Hz  
200 Hz  
2 kHz  
Minimum duty cycle  
5 %  
Default  
2 %  
1 %  
10 %  
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Flexible 0-10V Dimming Solution  
Package Dimensions  
6
Package Dimensions  
All dimensions in mm.  
Package Drawings  
Figure 13 Package Drawings  
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Flexible 0-10V Dimming Solution  
Package Dimensions  
Footprint  
Figure 14 Footprint  
18  
v 1.3  
2017-01-27  
CDM10V  
Flexible 0-10V Dimming Solution  
References  
Packing Description  
Packing Type  
Tape and Reel  
Reel: 180  
Pieces / Reel:  
3000  
Reels / Box: 1  
Figure 15 Packing  
7
References  
Additional support material can be found under the following link.  
Related information  
http://www.infineon.com/CDM10V  
Revision History  
Major changes since previous revision  
Revision History  
Reference  
v1.0  
Description  
Initial Version  
v1.1  
Typos, added Table 5  
v1.2  
Typos p 12, p 13  
v1.3  
Additional information about the max rating of Rdim-Pin (Image, Table 5)  
19  
v 1.3  
2017-01-27  
Trademarks of Infineon Technologies AG  
µHVIC, µIPM, µPFC, AU-ConvertIR, AURIX, C166, CanPAK, CIPOS, CIPURSE, CoolDP, CoolGaN, COOLiR, CoolMOS, CoolSET, CoolSiC, DAVE,  
DI-POL, DirectFET, DrBlade, EasyPIM, EconoBRIDGE, EconoDUAL, EconoPACK, EconoPIM, EiceDRIVER, eupec, FCOS, GaNpowIR, HEXFET,  
HITFET, HybridPACK, iMOTION, IRAM, ISOFACE, IsoPACK, LEDrivIR, LITIX, MIPAQ, ModSTACK, my-d, NovalithIC, OPTIGA, OptiMOS, ORIGA,  
PowIRaudio, PowIRStage, PrimePACK, PrimeSTACK, PROFET, PRO-SIL, RASIC, REAL3, SmartLEWIS, SOLID FLASH, SPOC, StrongIRFET,  
SupIRBuck, TEMPFET, TRENCHSTOP, TriCore, UHVIC, XHP, XMC.  
Trademarks Update 2015-12-22  
Other Trademarks  
All referenced product or service names and trademarks are the property of their respective owners.  
Edition 2017-01-27  
Published by  
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