application notes correspond to analog ciruits, ultra low noise 8mvp-p small size, long-life, isolated type dc-dc converter 1.5 watt vy-l series vy-l series is most suitable for analog and digital circuit which has usually for vy-l series, output capacitors are not requir ed. however, in order t o achieved ultra low noise. obtain lower noise level by taking advantage of the performance of the convert e the test data below is an emi test data which proves that it passed the make sure to design the printed board with special atten tion to the following ite m fcc class b (3m) standards the input/ output noise can be lowered. radiated emission fcc class b <3m> 1. use low impedance capacitor with good high frequency characteristic. 2. shorten the lead of each capacitor as much as possible, and make it low lea d model name vy05-12w06l inductance. serial no. es1 3. make the wiring loop space between the (+) and (-) of both input and output p power supply +5v side as small as possible. the possibilities of leakage inductance can be load 12v 65ma decreased. det. mode peak 4. design the print pattern of the main circuit as thick and short as possible. limits 30mhz - 1000khz 5. the pin side of vy-l series do not have a metallic shield, so if the pin side o f band number 3 meas mode : d printed circuit board is ground plane, the radiation noise will be shut off and antenna mode horizontal noise can be lowered. test equip. tr4172, tr14307 lowering the noise level of vy-sl series c1=33f c2=4.7f c3=0.47f (electrolytic or multilayer ceramic) model name vy05-12w06l serial no. es1 power supply +5v load 12v 65ma det. mode peak limits 30mhz- 1000khz lowering the noise level of vy-wl series band number 3 meas mode : d c1=33f c2, c3=4.7f c4, c5=0.47f (electrolytic or multilayer ceramic) antenna mode vertical test equip. tr4172, tr14307 out p ut noise of vy-05-12w06l ( measured b y fi g ure 11 circuit ) +12v65ma 3.8mvp-p 10mv/div 2s/div * the above test has been performed at the following site. testing institution: shindengen electric manufacturing co., ltd. emi laboratory -12v65ma field intensity measuring set: r-205 4.2mvp-p power supply terminal interfering voltage measuring set: c-205 10mv/div 2s/div kaga electronics/volgen dc-dc converters www.volgen.com 100% 0% 10mv 2s figure figure 10 figure 11 figure 12 figure 7 figure 9
correspond to analog ciruits, ultra low noise 8mvp-p small size, long-life, isolated type dc-dc converter 1.5 watt vy-l series soldering is to be executed under the following conditions. use vy-l series within the ambient temperature in the figure below. 1. soldering iron 340c to 360 c, 2sec. 2. soldering dip 230c5c, 5 sec. this product can not be washed whole. when and if cleaning should be necessary, use ipa and hand-wash only the soldered surface by brush cleaning. for further information, contact us. vy-l series will be damaged if the input voltage is connected reversed. lf there is a possibility of reverse connection, add a protection circuit as shown in the figure below. the figure below is an example using the fuse and diode. vy-l series do not have a built-in over-voltage protection. as shown in the block diagram, vy-l series drives the transformer by the switching operation of the primary tr. so this method is of very little possibility of over-voltage to be occurred by tr damage. however, to avoid damage at over-voltage mode, in advance, adding a circuit to intercept the supplying power circuit can be recommended. kaga electronics/volgen dc-dc converters www.volgen.com figure 13 100 40 50 60 70 80 90 80 20 10 0 -10 -20 -30 0 10 20 30 70 60 50 40 30 ambient temp. () load (%) figure 14 input voltage (v) load (%) input voltage derating 4.75 5 5.25 5.5 5.75 6 0 10 20 30 40 50 60 70 80 90 100 figure 15 capable temp. range for startup (no guarantee)
correspond to analog ciruits, ultra low noise 8mvp-p small size, long-life, isolated type dc-dc converter 1.5 watt vy-l series - for this product, parallel operation is not possible. - series connection is possible. when connecting in series, add diode to prevent reverse bias to the output of each converter. - this product has a built-in over-current, short protection circuit, but long time short circuit will cause failure, so avoid it. - be sure to execute soldering to the printed circuit board within the noted regulation temperature. - it can not be used in case that it would affect lives or properties directly by failure of this product. make sure to confirm us before adopting it. - product can not be used under oscillation, strike or temp. conditions that are out of the specification. contact for any questions. - no test certificate is attached to this product. this product shall be guaranteed for one year. during this period, if there should be any failure definitely due to our designing or manufacturing workmanship, we will replace it with new one at our own expense. but in case that it should be modified and/ or made internal remodeling by buyer itself whatsoever, we connot guarantee it. this guarantee shall cover only 1.5watt vy-l series. kaga electronics (usa) inc. 2480 n. first st., suite #100, san jose, ca 95131 tel: 408-570-0955 fax: 408-570-0186 e-mail: information@volgen.com url: http://www.volgen.com *all specification are subjected to change without notice.
We use cookies to deliver the best possible
web experience and assist with our advertising efforts. By continuing to use
this site, you consent to the use of cookies. For more information on
cookies, please take a look at our Privacy Policy.
