Instruction/ maintenance manual of the product 20A Datel
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D A TEL, Inc., Mansfield, MA 02048 (USA) · T el: (508)339-3000, (800)233-2765 F ax: (508)339-6356 · Email: sales@datel.com · Inter net: www.datel.com –V IN (1) +V IN (3) OPTO ISOLA TION PWM CONT.
USQ Series USQ-1.2/20-D48 1.2 20 25 50 ±0.05% ±0.05% 48 36-75 0.63/0.87 80% C33, P32 USQ-1.5/20-D48 1.5 20 40 65 ±0.05% ±0.05% 48 36-75 0.75/1.03 85% C33, P32 USQ-1.8/20-D48 1.8 20 50 80 ±0.05% ±0.05% 48 36-75 0.88/1.23 85% C33, P32 USQ-2.5/20-D48 2.
USQ Models Remote On/Off Control P olarity: Add "P" for positiv e polarity (pin 2 open = conv er ter on) Add "N" for negativ e polarity (pin 2 open = conv er ter off) P erformance/Functional Specifications T ypical @ T A = +25°C under nominal line voltage and full-load conditions , unless noted.
USQ Series 4 Remov al of Soldered USQ's from PCB's Should remov al of the USQ from its soldered connection be needed, it is very impor tant to thoroughly de-solder the pins using solder wic ks or de-soldering tools. At no time should an y prying or lev erage be used to remov e boards that hav e not been properly de-soldered first.
USQ Models 5 On/Off Control The primar y-side, Remote On/Off Control function (pin 2) can be specified to operate with either positiv e or negative polarity . P ositive-polarity devices ("P" suffix) are enabled when pin 2 is left open or is pulled high (+2.
USQ Series LOAD R TRIM DOWN +OUTPUT –INPUT +INPUT ON/OFF CONTROL TRIM +SENSE –OUTPUT –SENSE 4 5 1 3 6 8 7 2 LOAD R TRIM UP +OUTPUT –INPUT +INPUT ON/OFF CONTROL TRIM +SENSE –OUTPUT –SENSE 4 5 1 3 6 8 7 2 Figure 5. T rim Connections T o Increase Output V oltages Using Fixed Resistors Figure 6.
USQ Models 7 0 1 2 3 4 5 6 7 8 9 10 V OUT INCREASE (%) RESIST ANCE 1 x 10 6 1 x 10 5 1 x 10 4 1 x 10 3 Figure 7. USQ-1.2 T rim-Up Resistance vs. % Increase V OUT 0 1 2 3 4 5 6 7 8 9 10 V OUT INCREASE (%) RESIST ANCE 1 x 10 7 1 x 10 6 1 x 10 5 1 x 10 3 1 x 10 4 Figure 8.
USQ Series 0 1 2 3 4 5 6 7 8 9 10 V OUT INCREASE (%) RESIST ANCE 1 x 10 8 1 x 10 7 1 x 10 6 1 x 10 5 Figure 13. USQ-12 T rim-Up Resistance vs. % Increase V OUT 0 1 2 3 4 5 6 7 8 9 10 V OUT INCREASE (%) RESIST ANCE 1 x 10 8 1 x 10 7 1 x 10 6 1 x 10 5 Figure 14.
USQ Models LOAD +OUTPUT –INPUT Sense Current Contact and PCB resistance losses due to IR drops Contact and PCB resistance losses due to IR drops Sense Retur n +INPUT ON/OFF CONTROL TRIM +SENSE –OUTPUT –SENSE 4 5 1 3 6 8 I OUT Return I OUT 7 2 Remote Sense Note: The Sense and V OUT lines are not inter nally connected to each other .
USQ Series Load Conditions ➀ Performance Specifications 1.2V OUT 1.5V OUT 1.8V OUT 2.5V OUT 3.3V OUT 5V OUT 12 to 24V OUT Load Step = 50 to 75% of I OUT Max.: P eak Deviation, typ . 115mV 110mV 125mV 100mV 170mV 125mV 100mV Settling Time to ±1% of Final V alue, max.
USQ Models T ypical P erformance Curves f or 1.2V OUT Models 90 85 80 75 70 65 60 USQ-1.2/20-D48 Efficiency vs. Line V oltage and Load Current 2 4 6 8 10 12 14 16 18 20 Load Current (Amps ) Efficiency ( % ) V IN = 36V V IN = 48V V IN = 75V Start-Up from Remote On/Off Control (V IN = 48V , I OUT = 20A, C OUT = 10µF tantalum || 1µF ceramic.
USQ Series T ypical P erformance Curves f or 1.5V OUT Models .
USQ Models T ypical P erformance Curves f or 1.8V OUT Models .
USQ Series T ypical P erformance Curves f or 2.5V OUT Models Start-Up from V IN (V IN = 48V , I OUT = 20A, C OUT = 10µF tantalum || 1µF ceramic.) 2msec/div 1V/div 20V/div 2.5V OUT (pin 8) +Input (pin 3) Start-Up from Remote On/Off Control (V IN = 48V , I OUT = 20A, C OUT = 10µF tantalum || 1µF ceramic.
USQ Models T ypical P erformance Curves f or 3.3V OUT Models .
USQ Series T ypical P erformance Curves f or 5V OUT Models Start-Up from V IN (V IN = 48V , I OUT = 20A, C OUT = 10µF tantalum || 1µF ceramic.) 2msec/div 1V/div 20V/div 5V OUT (pin 8) +Input (pin 3).
USQ Models T ypical P erformance Curves f or 5V OUT Models .
USQ Series T ypical P erformance Curves f or 12V OUT Models Start-Up from V IN (V IN = 48V , I OUT = 8.3A, C OUT = 10µF tantalum || 1µF ceramic.) 2msec/div 5V/div 20V/div 12V OUT (pin 8) +Input (pin 3) 95 90 85 80 75 70 65 60 55 USQ-12/8.3-D48 Efficiency vs.
USQ Models Start-Up from Remote On/Off Control (V IN = 48V , I OUT = 8.3A, C OUT = 10µF tantalum || 1µF ceramic.) 2msec/div 5V/div 2V/div 12V OUT (pin 8) Remote On/Off Control (pin 2) USQ-12/8.3-D24: Output Current vs. Ambient T emperature (T ransverse air flow , pin 1 to pin 3; V IN = 24V , 1/2" heat sink.
USQ Series T ypical P erformance Curves f or 15V OUT Models 20 .
USQ Models 21 T ypical P erformance Curves f or 24V OUT Models Start-Up from Remote On/Off Control (V IN = 48V , I OUT = 4.2A, C OUT = 10µF tantalum || 1µF ceramic.) 2msec/div 10V/div 2V/div 24V OUT (pin 8) Remote On/Off Control (pin 2) Start-Up from V IN (V IN = 48V , I OUT = 4.
DS-0493D 10/04 BO TT OM VIEW –Input Remote On/Off +Input +Output +Sense Output T rim –Sense –Output Figure 20. Industry Standard Quarter-Brick Pinout Figure 20 readily allows users to confirm that DA TEL quar ter-brick DC/DC conv er ters are compatib le to the industry-standard pinout, independent of pin-numbering conv entions.
An important point after buying a device Datel 20A (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Datel 20A yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Datel 20A - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Datel 20A you will learn all the available features of the product, as well as information on its operation. The information that you get Datel 20A will certainly help you make a decision on the purchase.
If you already are a holder of Datel 20A, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Datel 20A.
However, one of the most important roles played by the user manual is to help in solving problems with Datel 20A. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Datel 20A along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
