AVO50B-48S3V3 Isolated DC/DC Converter TRN AVO50B-48S3V3 Isolated DC/DC Converter Technical Reference Notes Industry standard eighth brick: 36 ~ 75V input, 3.3V single output Features • Up to 15A output current • Industry standard eighth brick foot print 57.9mm %%%% 22.9mm %%%% 8.5mm (2.28” %% 0.9” %% 0.34”) %% %% • Basic isolation • Ultra high efficiency to 91.5% • High power density Industry standard eighth brick : 2.28” × 0.9’’ × 0.34’’ • Low output noise • Industry standard pinout • 2:1 wide input voltage of 36 ~ 75V Options • CNT function • Remote sense • Choice of positive logic or negative logic • Trim function: +10%/-20% for CNT function • Input under-voltage lockout • Choice of short pins or long pins • Output over-current protection (hiccup) • Output over-voltage protection (hiccup) • Over-temperature protection • RoHS compliant Description AVO50B-48S3V3 is a new open frame DC/DC converter for optimum efficiency and power density. AVO50B-48S3V3 provides up to 15A output current in an industry standard eighth brick, which makes it an ideal choice for small space, high current and low voltage applications. AVO50B-48S3V3 uses an industry standard eighth brick: 57.9mm × 22.9mm × 8.5mm (2.28” × 0.9” × 0.34”) and standard pin configuration. It includes extensive control and protection features for maximum flexibility and provides a versatile solution for a whole range of applications with its input voltage range of 36~75Vdc and it can provide 3.3V@15A single output that are isolated from inputs. The converter can achieve ultra high efficiencies and excellent thermal performance, for most applications a heatsink is not required. The product features fast dynamic response characteristics and low output ripple. This high quality and highly reliable product is competitively priced and an ideal solution for distributed power, telecoms and datacom applications. Document No.: 31020730 November 6, 2009 Rev 1.2 AVO50B-48S3V3 Isolated DC/DC Converter TRN Ordering Information AVO50 - 48 S 3V3 P - 4 L S ① ② ③ ④ ⑤ ⑥ ⑦ ⑧ Model series AVO: high efficiency 1/8 brick series, 50: output power 50W ① Input voltage 48: 36V ~ 75V input range, rated input voltage 48V ② Output number S: single output ③ Rated output voltage 3V3: 3.3V output ④ Remote ON/OFF logic Default: negative; P: positive logic ⑤ Pin length -4: 4.8mm ⑥ RoHS status L: RoHS, R6; Y: RoHS, R5 ⑦ Structure Default: SMT ⑧ Note: The following is based on positive logic modules. Negative logic modules are the same with positive ones except for their pin logic. http://www.emersonnetworkpower.com.cn AVO50B-48S3V3 Isolated DC/DC Converter TRN Electrical Specifications Unless otherwise indicated, specifications apply over all operating input voltage and temperature conditions. Standard test condition on a single unit is as follows: Tc (board): 25ºC Airflow: 200 LFM +Vin: 48V±2% -Vin: Return pin for +Vin CNT: Connect to -Vin for negative logic Open for positive logic +Vout: Connect to load -Vout: Connect to load (return) +Sense: Connect to +Vout -Sense: Connect to -Vout Trim (Vadj): Open Input Specifications Parameter Device Symbol Min Typ Max Unit Operating input voltage 3.3V VI 36 48 75 Vdc Maximum input current 3.3V II,max - - 2.5 A (VI = 0 to VI,max, Io = Io,max) Input reflected-ripple current 3.3V II - - 20 mAp-p (rated input and output) Supply voltage rejection (120Hz) 3.3V - 50 60 - dB CAUTION: This power module is not internally fused. An input line fuse must always be used. http://www.emersonnetworkpower.com.cn AVO50B-48S3V3 Isolated DC/DC Converter TRN Absolute Maximum Ratings Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. These are absolute stress ratings only. Functional operation of the device is not implied at these or any other conditions in excess of those given in the operational sections of the IPS. Exposure to absolute maximum ratings for extended periods can adversely affect device reliability. Parameter Device Symbol Min Typ Max Unit Continuous 3.3V VI 0 - 80 Vdc Input voltage Transient (100ms) 3.3V VI, trans 0 - 100 Vdc Operating ambient temperature 3.3V Ta -40 - 85 ºC (See Thermal Consideration) Operating board temperature 3.3V Tc -40 - 110 ºC Storage temperature 3.3V TSTG -55 - 125 ºC Operating humidity 3.3V - 5 - 95 RH% Basic input-output isolation (conditions: 1mA for 1min, slew rate of 3.3V - - - 2,000 Vdc 1,500V/10sec) Output power 3.3V Po,max 0 - 49.5 W http://www.emersonnetworkpower.com.cn AVO50B-48S3V3 Isolated DC/DC Converter TRN Output Specifications All specifications are typical at normal input Vin=48Vdc, rated output current at 25°C ambient unless otherwise specified. Parameter Device Symbol Min Typ Max Unit Output ripple and noise peak-to-peak (5Hz to 20MHz) (high frequency low ESR mVp-p 3.3V - - 50 - external capacitor required for each (f<20MHz) output, see Figure 21) External load capacitance 3.3V - 220 470 10,000 µF Output voltage setpoint (VI = VI,min to 3.3V Vo,set 3.25 3.3 3.35 Vdc VI,max: Io = Io,max; Ta = 25ºC ) Line (Vi,min to Vi,max) 3.3V - - 1 - mV Output Load (Io = Io,min to Io,max) 3.3V - - 1 - mV regulation Temperature (whole range) 3.3V - - - 0.02 %Vo/ºC Rated output current 3.3V Io 0 - 15 A Output current-limit inception (hiccup) 3.3V Io 16.5 - 21 A Thermal Over temperature 3.3V - - 120 - °C measurement spot protection (auto-recovery) Hysteresis 3.3V - 5 - - C ° Efficiency 3.3V - - 91.5 - % (VI = VI,nom ; Io,max; TA = 25 C) ° http://www.emersonnetworkpower.com.cn AVO50B-48S3V3 Isolated DC/DC Converter TRN Output Specifications (Cont) Parameter Device Symbol Min Typ Max Unit 25% Ionom step from Dynamic response: 3.3V - - 60 - mV 50%Ionom ( Io/ t = 1A/10µs; VI Δ Δ = VI,nom; TA = 25 C;) ° Deviation settling time 3.3V - - 50 - µsec 25% Ionom step from Dynamic response: 3.3V - - 110 - mV 50% Ionom ( Io/ t = 1A/1µs; VI = Δ Δ VI,nom; TA = 25°C;) Deviation settling time 3.3V - - 100 - µsec Turn-on time 3.3V - - 5 - msec (Io = Io,max ) Output voltage overshoot 3.3V - - 0 - %Vo (Io = Io,max ; TA = 25 C) ° Switching frequency 3.3V - - 310 - kHz http://www.emersonnetworkpower.com.cn AVO50B-48S3V3 Isolated DC/DC Converter TRN Feature Specifications Parameter Device Symbol Min Typ Max Unit Logic low 3.3V -0.7 - 1.2 V Enable pin voltage Logic high* 3.3V - 3.5 - 12 V Logic low 3.3V - - 0.4 - mA Enable pin current Logic high 3.3V - - - - µA (leakage current, @10v) Output voltage trim range 3.3V - 80 - 110 %Vo Output over-voltage (hiccup) 3.3V Vohiccup 3.9 - 5.0 V Turn-on point 3.3V - 31 34 36 V Under-voltage lockout Turn-off point 3.3V - 30 33 35 V Isolation capacitance 3.3V - - 1500 - PF Isolation resistance 3.3V - 10 - - M Ω Calculated MTBF Million 3.3V - - 2.5 - hours (Vin: 48V, load: ionom, board@25°C) Weight (open frame) 3.3V - - - 30 g (oz.) Vibration level: 3.5mm (2 ~ 9Hz), 10m/s2 (9 ~ 200Hz), 15m/s2 (200 ~ 500Hz) Vibration (sine wave) Directions and time: 3 axes (X, Y, Z), 30 minutes each Sweep velocity: 1oct / min Peak acceleration: 300m/s2 Shock (half-sine wave) Duration time: 6ms Continuous shock 3 times at each of 6 directions (±X, ±Y, ±Z) http://www.emersonnetworkpower.com.cn AVO50B-48S3V3 Isolated DC/DC Converter TRN Characteristic Curves 93 6 91 5 89 87 4 85 3 83 Vin=36V 81 2 Vin=36V Vin=48V 79 Vin=48V 0 Vin=75V 1 77 Vin=75V 75 0 0 2.5 5 7.5 10 12.5 15 0 2.5 5 7.5 10 12.5 15 Load (A) Load (A) Figure 1 Typical efficiency Figure 2 Typical power dissipation curve Figure 3 Typical start-up from power on Figure 4 Typical start-up from CNT on Figure 5 Typical transient response to step Figure 6 Typical transient response to step decrease in load from 50% to 25%, room decrease in load from 50% to 75%, room temperature, 48Vdc input (ΔIo/Δt = 0.1A/1µs) temperature, 48Vdc input (ΔIo/Δt = 0.1A/1µs) http://www.emersonnetworkpower.com.cn Effiency (%) Dissipation (W) AVO50B-48S3V3 Isolated DC/DC Converter TRN Figure 7 Typical transient response to step Figure 8 Typical transient response to step decrease in load from 50% to 25%, room increase in load from 50% to 75%, room temperature, 48Vdc input (ΔIo/Δt = 1A/1µs) temperature, 48Vdc input (ΔIo/Δt = 1A/1µs) 3.5 3 2.5 2 1.5 1 0.5 0 0 5 10 15 20 25 Output current (A) Figure 9 Typical output ripple voltage, Figure 10 Typical over-current room temperature, Io = Io,max 15 12 2m/s 9 1.5m/s 6 1m/s 0.5m/s 3 0m/s 0 25 40 55 70 85 Temperature, a ( ) ℃ Figure 11 Output power derating (airflow direction from output to input) http://www.emersonnetworkpower.com.cn Output current Io (A) Output voltage (V) AVO50B-48S3V3 Isolated DC/DC Converter TRN voltage of the converter in order to compensate for voltage drops in distribution and maintain a Feature Description regulated voltage at the point of load. When the converter is supporting loads far away, or is used with undersized cabling, significant CNT Function voltage drop can occur at the load. The best The converter is equipped with a primary defense against such drops is to locate the load ON/OFF pin used to remotely turn converter on close to the converter and to ensure adequately or off via a system signal. Two CNT logic options sized cable is used. When this is not possible, are available. For the positive logic model a the converter can compensate for a drop of up to system logic low signal will turn the unit off. For 10% Vo, through use of the sense leads. the negative logic model a system logic high When used, the + Sense and - Sense leads signal will turn the converter off. For negative should be connected from the converter to the logic models where no control signal will be used point of load as shown in Figure 13, using the ON/OFF pin should be connected directly to twisted pair wire, or parallel pattern to reduce -Vin to ensure proper operation. For positive noise effect. The converter will then regulate its logic models where no control signal will be used output voltage at the point where the leads are the ON/OFF pin should be left unconnected. connected. Care should be taken not to reverse The following figure shows a few simple CNT the sense leads. If reversed, the converter will circuits. trigger OVP protection. When not used, the +Sense lead must be CNT CNT connected with +Vo, and -Sense with -Vo. If +Sense and –Sense are not connected the -Vin -Vin output voltage could drift beyond the nominal Simple control Transistor control range. Although the output voltage can be CNT CNT increased by both the remote sense and the trim, the maximum increase for the output voltage is -Vin not the sum of both. The maximum increase is -Vin Isolated control Relay control the larger of either the remote sense or the trim. Figure 12 CNT circuit Note that at elevated output voltages the maximum power rating of the module remains Remote Sense the same, and the output current capability will decrease correspondingly. The converter can remotely sense both lines of +Vo its output which moves the effective output +S +Sense Twisted pair voltage regulation point from the output Load -Sense terminals of the unit to the point of connection of -S the remote sense pins. The sense leads conduct -Vo very little current compared with the power leads Figure 13 Sense connections and therefore provide a more accurate indication of load voltage for regulation purposes. This feature automatically adjusts the real output http://www.emersonnetworkpower.com.cn AVO50B-48S3V3 Isolated DC/DC Converter TRN Trim down Trim With an external resistor between the TRIM and The +Vo output voltage of AVO50B-48S3V3 can -Sense pins, the output voltage set point be trimmed using the trim pin provided. Applying decreases (see Figure 15). a resistor to the trim pin through a voltage divider from the output will cause the +Vo output to +Vin +Vo increase by up to 10% or decrease by up to 20%. +Sense Trimming up by more than 10% of the nominal CNT R output may activate the OVP circuit or damage adj_ down R Trim Load the converter. Trimming down more than 20% -Sense can cause the converter to regulate improperly. - Vin If the trim pin is not needed, it should be left -Vo open. Figure 15 Trim down circuit Trim up The following equation determines the required external-resistor value to obtain a percentage With an external resistor connected between the output voltage change of %. TRIM and +Sense pins, the output voltage set 510 point increases (see Figure 14). R = −10.2(kΩ) adj−down Δ +Vin +Vo Note: △= (Vnom-Vo) % 100/Vnom For example: to trim down the output to 2.64V, +Sense △=(3.3-2.64) % 100/3.3=20 CNT R Trim Load 510 R adj_ up R = −10.2(kΩ) adj−down 20 -Sense - Vin R = 15.3(kΩ) -Vo adj−down Although the output voltage can be increased by Figure 14 Trim up circuit both the remote sense and the trim, the The following equation determines the required maximum increase for the output voltage is not external-resistor value to obtain a percentage the sum of both. The maximum increase is the output voltage change of %. larger of either the remote sense or the trim. 5.1×V ×(100+Δ) 510 nom Note that at elevated output voltages the R = − −10.2(kΩ) adj−up 1.225×Δ Δ maximum power rating of the module remains the same, and the output current capability will Note: △= (Vo-Vnom) % 100/Vnom decrease correspondingly. For example: to trim up the output to 3.63V, △=(3.63-3.3) % 100/3.3=10 Minimum Load Requirements 5.1× 3.3×(100+10) 510 R = − −10.2(kΩ) adj−up 1.225×10 10 There is no minimum load requirement for AVO50B-48S3V3 converter. R = 89.9(kΩ) adj−up http://www.emersonnetworkpower.com.cn AVO50B-48S3V3 Isolated DC/DC Converter TRN Output Capacitance Decoupling High output current transient rate of change Noise on the power distribution system is not (high di/dt) loads may require high values of always created by the converter. High speed output capacitance to supply the instantaneous analog or digital loads with dynamic power energy requirement to the load. To minimize the demands can cause noise to cross the power output voltage transient drop during this inductor back onto the input lines. Noise can be transient, low ESR (Equivalent Series reduced by decoupling the load. In most cases, Resistance) capacitors may be required, since a connecting a 10µF tantalum or ceramic capacitor high ESR will produce a correspondingly higher in parallel with a 0.1µF ceramic capacitor across voltage drop during the current transient. the load will decouple it. The capacitors should When the load is sensitive to ripple and noise, be connected as close to the load as possible. an output filter can be added to minimize the effects. A simple output filter to reduce output Ground Loops ripple and noise can be made by connecting a Ground loops occur when different circuits are capacitor C1 across the output as shown in given multiple paths to common or earth ground, Figure 16. The recommended value for the as shown in Figure 18. Multiple ground points output capacitor C1 is 470µF. have slightly different potential and cause +Vo current flow through the circuit from one point to another. This can result in additional noise in all Load C1 the circuits. To eliminate the problem, circuits -Vo should be designed with a single ground connection as shown in Figure 19. Figure 16 Output ripple filter R R Line Line +Vo +Vo Load Load C2 C1 Load R R Line Line -Vo -Vo R Ground Line R Line Loop Figure 17 Output ripple filter for a distant load Figure 18 Ground loops Extra care should be taken when long leads or R R traces are used to provide power to the load. Line Line +Vo Long lead lengths increase the chance for noise to appear on the lines. Under these conditions Load Load R R C1 can be added across the load, with a 1µF Line Line -Vo ceramic capacitor C2 in parallel generally as R Line shown in Figure 17. Figure 19 Single point ground http://www.emersonnetworkpower.com.cn AVO50B-48S3V3 Isolated DC/DC Converter TRN Figure 20. In both cases the diode used is rated Output Over-Current Protection for 10A/100V. Placing the diode across the inputs rather than in-line with the input offers an AVO50B-48S3V3 converter features foldback advantage in that the diode only conducts in a current limiting as part of their OCP reverse polarity condition, which increases (Over-current Protection) circuits. When output circuit efficiency and thermal performance. current exceeds 110 to 140% of the rated current, such as during a short circuit condition, + Vin + Vin the module will shut down and then enter a - Vin - Vin “hiccup mode” where it repeatedly turn on and off at a 2Hz (nominal) frequency with a 2% duty Figure 20 Reverse polarity protection circuit cycle until the short circuit condition is removed. This prevents excessive heating of the converter Safety Consideration or the load board. For safety-agency approval of the system in Output Over-Voltage Protection which the power module is used, the power module must be installed in compliance with the The output over-voltage protection consists of spacing and separation requirements of the circuitry that monitors the voltage on the output end-use safety agency standards, i.e., UL1950, terminals. If the voltage on the output terminals CSA C22.2 No. 950-95, and EN60950. The exceeds the over voltage protection threshold, AVO50B-48S3V3 input-to-output isolation is a the module will shut down and then enter a basic insulation. The DC/DC power module “hiccup mode” where it repeatedly turn on and should be installed in end-use equipment, in off at a 2Hz (nominal) frequency with a 2% duty compliance with the requirements of the ultimate cycle until the over-voltage condition is removed. application, and is intended to be supplied by an This prevents damage to the load circuit. isolated secondary circuit. When the supply to the DC/DC power module meets all the Over-Temperature Protection requirements for SELV (<60Vdc), the output is considered to remain within SELV limits (level 3). The module features an over-temperature If connected to a 60Vdc power system, double protection circuit to safeguard against thermal or reinforced insulation must be provided in the damage. The module will work on intermittent power supply that isolates the input from any mode when the maximum device reference hazardous voltages, including the AC mains. temperature is exceeded. When the One input pin and one output pin are to be over-temperature condition is removed, the grounded or both the input and output pins are to converter will automatically restart. be kept floating. Single fault testing in the power supply must be performed in combination with Input Reverse Voltage Protection the DC/DC power module to demonstrate that the output meets the requirement for SELV. The Under installation and cabling conditions where input pins of the module are not operator reverse polarity across the input may occur, accessible. reverse polarity protection is recommended. Protection can easily be provided as shown in http://www.emersonnetworkpower.com.cn AVO50B-48S3V3 Isolated DC/DC Converter TRN Note: Do not ground either of the input pins of Typical Application the module, without grounding one of the output pins. This may allow a non-SELV voltage to F1 +VIN +Vo appear between the output pin and ground. +SENSE Vin CNT1 Co1 Co2 TRM LOAD Cin S1 -SENSE Fusing -VIN -Vo AVO50B-48S3V3 converter has no internal fuse. Figure 21 Typical application An external fuse must always be employed! To F1: Fuse*: 5A fuse (fast blow type). meet international safety requirements, a 250 Cin: Recommended input capacitor, Volt rated fuse should be used. If one of the 100µF/100V high frequency low ESR electrolytic input lines is connected to chassis ground, then type capacitor. the fuse must be placed in the other input line. Co1: Recommended 1µF /23.3V ceramic Standard safety agency regulations require input capacitor fusing. Recommended rating is 5A for Co2: Recommended output capacitor AVO50B-48S3V3. Recommended 1,000µF/23.3V high frequency Note: The fuse is fast blow type. low ESR electrolytic type capacitor. If Ta<-5℃: use 220µF tantalum capacitor parallel with Co2. Note: AVO50B-48S3V3 converter cannot be used in parallel mode directly! http://www.emersonnetworkpower.com.cn AVO50B-48S3V3 Isolated DC/DC Converter TRN EMC For conditions where EMI is a concern, a different input filter can be used. Figure 22 shows the filter designed to reduce EMI effects for AVO50B-48S3V3. FM100 +Vout +Vin Cy1 +Vin +Vout L1 L2 +S 5 8 5 8 . . DC/DC Cx C1 C2 Trim . . 1 4 1 4 CNT -S Cy2 -Vout -Vin -Vin -Vout PE Figure 22 EMI reduction filter Recommended values: Component Value/rating Type C1 100µF/100V Aluminium electrolytic capacitor C2 220µF/23.3V Aluminium electrolytic capacitor, low ESR L1 Magnetic material: R10k 150µH dimension: T8.89 × 3.81 × 4.63 mm L2 Magnetic material: R10k 480µH FM100 (Emerson filter dimension: T9.53 × 4.75 × 4.3 mm converter) Cx 4.7µF/100V Ceramic chip capacitor Cy1 4700pF/1500V Leaded multilayer ceramic capacitor Cy2 4700pF/1500V Leaded multilayer ceramic capacitor http://www.emersonnetworkpower.com.cn AVO50B-48S3V3 Isolated DC/DC Converter TRN 1. There should be no electrical connection between the case and the PE or any module Thermal Consideration ports. Thermal management is an important part of 2. The fixing screw of the heatsink should not the system design. AVO50B-48S3V3 converter be too long. Please refer to the mechanical has ultra high efficiency at full load., and the chart for detail. module exhibit good performance during Soldering pro-longed exposure to high temperatures. However, to ensure proper and reliable AVO50B-48S3V3 converter is compatible with operation, sufficient cooling of the power standard wave soldering techniques. When module and power derating is needed over the wave soldering, the converter pins should be entire temperature range of the module. preheated for 20 ~ 30 seconds at 110°C, and Considerations includes ambient temperature, wave soldered at 260°C for less than 10 airflow, module power derating. seconds. Heat can be removed by increasing airflow When hand soldering, the iron temperature over the module. The module should work should be maintained at 425°C and applied to under 85°C ambient for the reliability of the converter pins for less than 5 seconds. operation. With 48V input, 55°C ambient Longer exposure can cause internal damage to temperature, and 200LFM airflow, the converter. Cleaning can be performed with AVO50B-48S3V3 is rated for full power. For cleaning solvent IPA or with water. operation above ambient temperature of 85°C, output power must be derated as shown in Figure 11. Increasing airflow over the module AVO50B-48S3V3/PLS is intended for standard manual，reflow or wave soldering. enhances the heat transfer via convection. When reflow soldering is used, the temperature on pins is specified to maximum 260°C for Mechanical Considerations maximum 10s. When wave soldering is used, the temperature Installation on pins is specified to maximum 260°C for maximum 7s. Although AVO50B-48S3V3 converter can be When soldering by hand, the iron temperature mounted in any orientation, free airflow must should be maintained at 300°C ~ 380°C and be taken. Normally power components are applied to the converter pins for less than 10s. always put at the end of the airflow path or Longer exposure can cause internal damage to have separate airflow paths. This can keep the converter. other system equipment cooler and increase Cleaning of solder joint can be performed with component life spans. cleaning solvent IPA or similative. Note: http://www.emersonnetworkpower.com.cn AVO50B-48S3V3 Isolated DC/DC Converter TRN Mechanical Chart (Top View) Open Frame 57.9 [2.28] 7.62 [0.300] 50.80 [2.000] 4 1 Top view 5 2 6 7 3 8 6-Φ1.0±0.10 2-Φ1.5±0.10 Pin length option 6-Φ2.0±0.1 Device code L suffix -4 4.8mm=+/-0.5mm -6 3.8mm=+/-0.5mm Tolerances: X.Xmm=+/-0.5mm -8 2.8mm=+/-0.25mm X.XXmm=+/-0.25mm 5.8mm=+/-0.5mm None Notes: 1. Un-dimensioned components are for visual reference only. 2. Pins 1-3, 5-7 are 1.0mm diameter with 2.0mm diameter standoff shoulders. 3. Pins 4, 8 are 1.5mm diameter with no standoff shoulders. Pins Definition Pin number Function Pin number Function P 1 +Vin P 5 +Sense P 2 CNT P 6 Trim P 3 -Vin P 7 -Sense P 4 +Vo P 8 -Vo http://www.emersonnetworkpower.com.cn 22.9 [0.90] 8.5 [0.36] 15.24 [0.600] L 15.24 [0.600] AVO50B-48S3V3 Isolated DC/DC Converter TRN The mechanical chart of AVO50B-48S3V3LS is as below: 57.90[2.280] 50.80[2.000] Bottom view 4 3 5 2 6 7 1 8 Side view 2-Ф2.0±0.1 6-Ф1.5±0.1 Load board Unit: mm[inch] Bottom view: pin on upside Tolerance : X.Xmm±0.5mm[X.X in.±0.02in.] X.XXmm±0.25mm[X.XX in.±0.01in.] Pin No. Function Pin No. Function P1 Vin(+) P5 -SENSE P2 CNT P6 TRIM P3 Vi(-) P7 +SENSE P4 Vo(-) P8 Vo(+) http://www.emersonnetworkpower.com.cn 22.90[0.902] 8.9[0.35] 15.24 [0.600] 7.62[0.300] 2.60±0.05 15.24[0.600] 0.3[0.12]MIN AVO50B-48S3V3 Isolated DC/DC Converter TRN Ordering Information Model number Description AVO50B-48S3V3-4 3.8mm pin length; negative on/off logic; R6 compliant AVO50B-48S3V3P-4 3.8mm pin length; positive on/off logic; R6 compliant AVO50B-48S3V3LS 3.8mm pin length; negative on/off logic; R6 compliant AVO50B-48S3V3PLS 3.8mm pin length; positive on/off logic; R6 compliant Hazardous Substances Announcement (RoHS Of China) Hazardous Substances Parts 6＋＋＋＋ Pb Hg Cd Cr PBB PBDE AVO50B ○ ○ ○ ○ ○ ○ ○: Means the content of the hazardous substances in all the average quality materials of the part is within the limits specified in SJ/T-11363-2006 √: Means the content of the hazardous substances in at least one of the average quality materials of the part is outside the limits specified in SJ/T11363-2006 Emerson Network Power Co., Ltd. has been committed to the design and manufacturing of environment-friendly products. It will reduce and eventually eliminate the hazardous substances in the products through unremitting efforts in research. However, limited by the current technical level, the following parts still contain hazardous substances due to the lack of reliable substitute or mature solution: 1. Solders (including high-temperature solder in parts) contain plumbum. 2. Glass of electric parts contains plumbum. 3. Copper alloy of pins contains plumbum http://www.emersonnetworkpower.com.cn