DIM3R3400 400W DC/DC Power Modules FEATURES High efficiency 98.2% @ 48Vin, 400W High efficiency 98.5% @ 48Vin, 300W Size: 58.4x36.8x14.2mm(2.30”x1.45”x0.56”) Standard footprint Industry standard pin out Input UVLO, Main Output OCP, OTP Management power: OCP,OTP and OVP 3.3Vdc(3.6A) isolated management power for module self or other housekeeping functions. 5.0V/150mA BLUE_LED power Input OR'ing for the A/B dual input power feeds as well as A/B Enable signals Inrush protection and hot swap capability Integral EMI filter designed for the ATCA board to meet CISPR Class B Adjustable Hold Up Voltage from 50 to 95 V For charging the external holdup capacitors resulting in significant board real estate savings and bleed resistor power dissipation I2C interface for data monitoring and reporting Hardware alarms via opto-isolators for loss of A or B Feeds/Fuse ISO 9001, TL 9000, ISO 14001, QS9000, OHSAS18001 certified manufacturing facility UL/cUL 60950-1 (US & Canada) Delphi Series DIM, 400W Dual Input Power Processing DC/DC Power Modules OPTIONS The Delphi DIM series, 400W dual redundant input power processing isolated DC/DC converter is the latest offering from a world leader in power system technology and manufacturing ― Delta Electronics, Inc. This product family provides up to 400 watts of power in an industry standard footprint and pinout. The DIM series is designed to simplify the task and reduce the board space of implementing dual redundant, hot swappable 48Vdc power distribution with EMI filtering and inrush current limiting for an ATCA (Advanced Telecommunications Computing Architecture) or other telecom boards. In addition to processing the dual redundant 48V bus, the DIM module also provides isolated auxiliary 3.3V (3.6A), and/or 5V (150mA) BLUE_LED power for other housekeeping functions. With creative design technology and optimization of component placement, these converters possess outstanding electrical and thermal performances, as well as extremely high reliability under highly stressful operating conditions. All models are fully protected from abnormal input/output voltage, current, and temperature conditions. DATASHEET DS_DIM3R3400_05052014 5.0V LED Power disable or enable APPLICATIONS Telecom / Datacom Wireless Networks Optical Network Equipment Server and Data Storage Industrial / Testing Equipment E-mail: [email protected] http://www.deltaww.com/dcdc P1 TECHNICAL SPECIFICATIONS PARAMETER NOTES and CONDITIONS DIM3R3400 (Standard) Min. ABSOLUTE MAXIMUM RATINGS Input Voltage Continuous Transient Transient Reverse polarity Operating Ambient Temperature Storage Temperature ISOLATION Input to SHELF_GND Voltage Input to LOGIC_GND Voltage MAIN INPUT (DUAL FEED) CHARACTERISTICS Operation Input Voltage Range Input UVLO Turn-On Voltage Threshold Turn-Off Voltage Threshold Off Converter Input Current Maximum Input Current Over Current Protection Setpiont POWER & MAIN OUTPUT (-48V output) Input Power, Maximum Allowable Efficiency Efficiency Management Power, Maximum Deliverable Module Standby Current Vin=-48V, Main Output External Output Filter Capacitance HOT SWAP Inrush Transient INPUT A/B FEED LOSS / FUSE ALARM Alarm ON Input Voltage Threshold Transistor Collector to Emitter Voltage Transistor Collector to Emitter Current Transistor Collector Saturation Voltage HOLD UP CAPACITANCE INTERFACE Hold-up Capacitor Voltage trim range Hold-up Capacitor Voltage Accuracy Hold-up Capacitor Charge Current Maxmum Hold-up Capacitance (C_HOLD) To initiate hold up ,Input Voltage Threshold To arm hold up ,Input Voltage Threshold Typ. 1ms 100ms No damage,Low current -40 -55 -36 VRTN_OUT VRTN_OUT open load open load Max. Units -75 -100 -80 +75 85 125 Vdc Vdc Vdc Vdc °C °C 1500 2250 Vdc Vdc -75 V 27 25 Vin < UVLO voltage Po=400W, 3.3V=0,Vin=-36 to -75V Vdc Vdc 35 14 15.5 12 17 400 Po=400W, 3.3V/5.0V no load,Vin=-48V Po=400W, 3.3V/5.0V no load,Vin=-48V mA A A 12 W % % W 680 mA F 2 A -40.4 40 V Vdc mA V 98.5 98.2 Pout=0W, 3.3V=0W, 5.0V=0W 60 80 Po=400W, Vin=-75V, 3.3V=0W, 5.0V=0W -36.4 -38.4 50 0.2 -50 -87.2 -32.4 -32.4 -90 -90 10 1000 -34.5 -34.5 0.4 -95 -92.8 3300 -36.4 -36.4 V V mA F V V (TA=25°C, airflow rate=300 LFM, Vin=-48Vdc, nominal Vout unless otherwise noted;) DS_DIM3R3400_05052014 E-mail: [email protected] http://www.deltaww.com/dcdc P2 TECHNICAL SPECIFICATIONS PARAMETER MANAGEMENT POWER (3.3V) Operating Input Voltage Total Output Voltage Range (total) Input UVLO Turn-On Voltage Threshold Turn-Off Voltage Threshold Output Regulation Line Regulation Load Regulation Temperature Regulation Output Voltage Overshoot Switching Frequency Output Ripple and Noise RMS Peak-to-peak Output Current Over Current Protection Output Over Voltage Protection Dynamic Response (20 MHz bandwidth) Peak Deviation Settling Time Turn-On Delay Times Turn-On Rising Times External Load Capacitance BLUE LED POWER (5V) Operating Input Voltage Total Output Voltage Range Output Ripple and Noise Operating Output Current Range Dual Enable Input Characteristics Enable_A/B Threshold Current drain per enable pin(Vin=-75V) Digital Signal Interface Characteristics Clock Rate Measurement Tolerance Feed Voltage A/B Holdup Voltage -48V_OUT Current -48V_OUT Current Temperature GENERAL SPECIFICATIONS Weight Calculated MTBF NOTES and CONDITIONS DIM3R3400 (Standard) Min. Typ. Max. Units Continuous Over Vin, load, temperature -36 3.17 -48 3.30 -75 3.43 V open load open load 26 21.6 27 22.6 28 23.6 Vdc Vdc 0.05 0.05 1 0.2 0.2 2 5 %Vo %Vo %Vo %Vo KHz 30 80 3.6 7 5.4 mV mV A A V 1000 %Vo S mS mS F Vi= Vi,min to Vi,max Io=Io,min to Io,max Ta=Ta,min to Ta,max 450 10F Tan cap and 1F ceramic cap 5Hz to 20 MHz bandwidth 5Hz to 20MHz bandwidth Hiccup mode Voltage limitation mode load step is 50%~100%~50%, slew rate is 0.1A/S 12 50 0 4 3.7 6 100 80 2 I(3.3V)=3.6A I(3.3V)=3.6A Io=Io,min to Io,max Continuous 5.5 -36 4.9 -48 5 30 0.15 Vdc Vdc mV A 34 36 0.38 V mA 100 400 kHz +/-2.5 +/-2.5 +/-2.5 +/-3 5 % % % % °C 0 32 50%~100% Load 30%~50% Load NTC resistor temperature Above 25°C 80% load,300LFM, 40°C Ta Refer to Figure 13 for Hot spot location Over-Temperature Shutdown (Hot Spot) (48Vin,80%Po, 200LFM,Airflow from Vin- to Vin+) Over-Temperature Shutdown (NTC Resistor) Refer to Figure 13 for NTC resistor location Note: Please attach thermocouple on NTC resistor to test OTP function, the hot spot’s temperature is just for reference. -75 5.1 30 2.49 Grams Mhours 135 °C 125 °C (TA=25°C, airflow rate=300 LFM, Vin=48Vdc, nominal Vout unless otherwise noted;) DS_DIM3R3400_05052014 E-mail: [email protected] http://www.deltaww.com/dcdc P3 DIM3R3 INTERNAL BLOCK DIAGRAM PIN FUNCTIONS PIN NO. PIN NAME DESCRIPTION 1 -48_A -48V_A Feed (Externally Fused) 2 -48_B -48V_B Feed (Externally Fused) 3 VRTN_A VRTN_A Feed (Externally Fused) 4 VRTN_B VRTN_B Feed (Externally Fused) 5 ENABLE_A ENABLE_A Feed (Externally Fused) (Short Res, connected to VRTN_A on the back plane) 6 ENABLE_B ENABLE_B Feed (Externally Fused) (Short Res, connected to VRTN_B on the back plane) 7 SHELF_GND Shelf / Chassis / Safety Ground 8 5.0V 5.0V Isolated Power output (reference to LOGIC_GND) 9 3.3V 3.3V Isolated Output (reference to LOGIC_GND) 10 I2C_ADR I2C Address Input (reference to LOGIC_GND) 11 I2C_DAT I2C data (reference to LOGIC_GND) 12 I2C_CLK I2C clock (reference to LOGIC_GND) 13 LOGIC_GND Logic / Secondary / Isolated Ground 14 ALARM Opto-isolated -48V A/B Feed Loss or Open Fuse Alarm (reference to LOGIC_GND) 15 -48V_OUT OR’d and Inrush Protected –48V Output Bus ((Negative output to payload power converter)) 16 HU_Trim Hold Up cap voltage trim 17 VRTN_OUT OR’d and Inrush Protected VRTN Output Bus (Positive output to payload power converter) 18 HU_CAP Holdup/Bulk capacitor output voltage (Negative Connection to -48V_OUT) DS_DIM3R3400_05052014 E-mail: [email protected] http://www.deltaww.com/dcdc P4 ELECTRICAL CHARACTERISTICS CURVES CH 3 CH 3 CH4 CH4 CH 1 CH 1 CH 2 CH 2 Figure 1: Input voltage turn-on threshold (50mS/div): CH1: Vin (VRTN_A reference to -48V_A, 20V/div). CH2: Iin (-48V_A, 1A/div). CH3: VRTN_OUT reference to –48V_OUT (20V/div). CH4: 3.3V(2V/div) Test conditions: (1) Feed A=48Vdc; Feed B=0Vdc (2) I(VRTN_OUT)=0A, I(3.3V)=0A,I(5.0V)=0A. (3) C2=470uF, C_hold=1000uF Figure 2: Input voltage turn-off threshold (2mS/div): CH1: Vin (VRTN_AF reference to -48V_A, 20V/div). CH2: Iin (-48V_A, 1A/div). CH3: VRTN_OUT reference to. –48V_OUT (20V/div). CH4: 3.3V(2V/div) Test conditions: (1) Feed A=37Vdc ; Feed B=0Vdc (2) I(VRTN_OUT)=1A,I(3.3V)=0A,I(5.0V)=0A. (3) C2=220uF, C_hold=1000uF CH 1 CH 3 CH 3 CH 4 CH 1 CH 2 CH 2 Figure 3: Inrush current (20mS/div): CH1: Vin (VRTN_AF reference to -48V_AF, 20V/div). CH2: Iin (-48V_AF, 1A/div). CH3: VRTN_OUT reference to –48V_OUT (20V/div). Test conditions: (1) Feed A=48Vdc, Feed B=0Vdc. (2) I(VRTN_OUT)=0A, I(3.3V)=0A, I(5.0V)=0A. (3) C2=470uF, C_hold=1000uF DS_DIM3R3400_05052014 Figure 4: Oring for one feed loss (500µS/div): CH1: IinA (1A/div) CH2: IinB (1A/div). CH3: VRTN_OUT reference to –48V_OUT (10V/div). CH4: 3.3V (1V/div). Test conditions: (1) Feed A=40V, Feed B=48V; (2) VRTN_OUT power=300W, I(3.3V)=3.6A, I(5.0V)=0A. (3) C2=220uF, C_hold=1000uF E-mail: [email protected] http://www.deltaww.com/dcdc P5 ELECTRICAL CHARACTERISTICS CURVES CH1 CH1 CH2 CH2 CH3 Figure 5: Hold up performance (2mS/div): CH1: VRTN_OUT reference to –48V_OUT (10V/div) CH2: HU_CAP (20V/div). . Test conditions: (1) Feed A=48Vdc; Feed B=0Vdc (2) Output power=300W (3) C2=220uF, C_hold=1000uF Figure 6: -48V_ALARM with loss of Feed (10mS/div): CH1: VinA (VRTN_AF reference to -48V_AF, 10V/div). CH2: VinB (VRTN_BF reference to -48V_BF, 10V/div). CH3: ALARM (2V/div) Test conditions: (1) Feed B turn off from 48Vdc; Feed A=48Vdc. (2) Output power=400W, I(3.3V)=3.6A, I(5.0V)=0A. (3) C2=220uF, C_hold=1000uF CH3 CH2 CH1 Figure 7: Efficiency vs. load current for minimum, nominal, and maximum input voltage at 25°C: Test conditions:. (1) I(3.3V)=0A; I(5.0V)=0A; (2) C2=220uF, C_hold=1000uF (3)Po( VRTN_OUT ref to -48V_OUT)from 40W to 400W DS_DIM3R3400_05052014 Figure 8: 3.3V and 5.0V start up waveform (20mS/div): CH1: VinA (VRTN_A referenced to -48V_AF, 50V/div). CH2: V(3.3V) (1V/div); CH3: V(5.0V) (1V/div) Test conditions: (1) Feed A=48Vdc; Feed B=0Vdc (2) I(VRTN_OUT)=1A,I(3.3V)=3.6A, I(5.0V)=0.15A (3) C2=220uF, C_hold=1000uF E-mail: [email protected] http://www.deltaww.com/dcdc P6 ELECTRICAL CHARACTERISTICS CURVES CH 1 CH 1 CH 2 CH 2 Figure 9: 3.3Vand 5.0V output ripple/noise (2uS/div): CH1: Vo, 3.3V (50mV/div). CH2: Vo, 5.0V (50mV/div). Figure 10: 3.3V dynamic response (1mS/div): CH1: Vo, 3.3V(100mV/div). CH2: Io, 3.3V (1A/div) Test conditions: (1) Feed A=48Vdc; Feed B=0Vdc (2) I(3.3V)=3.6A,I(5.0V)=0.1A (3) C2=220uF, C_hold=1000uF Test conditions: (1) Feed A=48Vdc; Feed B=0Vdc (2) 3.3V load current (50%-75%-50% of Io,max, di/dt = 0.1A/µs) (3) C2=220uF, C_hold=1000uF DS_DIM3R3400_05052014 E-mail: [email protected] http://www.deltaww.com/dcdc P7 APPLICATION CIRCUITS TYPICAL VALUES FOR ABOVE COMPONENTS: POSITION VALUE NOTE F1,F2 1A, FUSE F3,F4 15A, FUSE F5,F6 15A, FUSE R1,R2 15Ω, RESISTOR R3 3.3KΩ, RESISTOR C1 10F, CAP C2 220~680F C3 No additional output capacitors are required, this cap are highly recommended to reduce the switching ripple and noise. Recommended to use 2pcs EKZE101EC3221MK25S(220uF,ESR is 47mΩ) in parallel to improve output voltage stability. Defined by DC/DC converter application note C4 Optional C_HOLD 2 * Power * T _ HLDP HU _ CAP 2 Vth 2 R_ TRIM 500000/(V DS_DIM3R3400_05052014 hu -50)-10000 for the definition of parameters, please see page 10 Connect a resistor between Hold Up_ Trim and -48V_OUT can set the Hold up cap voltage, please see page 10 E-mail: [email protected] http://www.deltaww.com/dcdc P8 FEATURES AND DESIGN CONSIDERATIONS Introduction The DIM3R3400 module is designed to simplify the task and reduce the board space of an ATCA (Advanced Telecommunications Computing Architecture) power entry distribution requirements in the system board. The main functionality of the module is to provide dual, redundant -48V A/B Feed OR’ing, inrush protection for hot swap capability, EMI filtering to attenuate the noise generated by the downstream DC/DC converters, and a Adjustable Hold Up Voltage from 50 to 95 V for charging the holdup capacitor. The module also has a management power supply which provides an 3.3V/3.6A management power and a 5V/150mA output (optional) to power the blue LED per PICMG 3.0 requirement. The module provides A/B feed/fuse open alarm, over current protection, over voltage protection, and over temperature protection. It also provides input under voltage lock-out and input reverse polarity protection. EMI Filtering An internal EMI filter is designed for the ATCA board to meet the system conducted emission requirements of CISPR 22 Class B when used with Delta DC/DC converters. Figure 11 shows the EMI performance of DIM3R3400 when it worked with Delta power module Q48SQ12033NRFH. It meets CISPR 22 Class B requirement. dBμV 80.0 Limits 55022MQP 55022MAV 70.0 60.0 50.0 40.0 Transducer 8130 Traces PK+ AV 30.0 20.0 10.0 0.0 150 kHz A/B Feed OR’ing To improve the total power distribution efficiency, four internal MOSFETs are used to function as the OR’ing diodes. A control circuit is designed to keep about 60mV voltage drop across MOSFET. During full load operation, the MOSFETs are fully turned on. During light load, the MOSFETs work under a high Rdson condition. If the output current decreases to zero, the MOSFETs will be turned off. This design provides module a reverse voltage sustain function. The module shall not be damaged from reverse polarity connection in the event of mis-wiring of either input feeds at the shelf input terminals. Furthermore, a fast shut down circuit is designed for the negative current case. This design protects the common DC bus against hard short faults at the sourcing power supply output. 1 MHz 10 MHz 30 MHz Figure 11,DIM3R3400 EMI(work with Delta power module Q48SQ12033NRFH). Holdup Capacitor Charging An off line holdup capacitor (C_HLDP) is needed to store energy for the holdup time requirement. C_HLDP is charged to a set voltage Vcap(A resistor connect from Hold up _trim to -48V_out will set the cap voltage). For a fixed energy storage requirement, high capacitor voltage reduces capacitor capacitance and size. A constant current circuit charges C_HLDP before its voltage reaches the high limitation and isolates it from power train circuit. The discharge switch will turn on if both A&B feeds have dropped below –35V (typical). C_HLDP will be connected to power train and provided the energy for system operation. Hot Swap Functionality C_HLDP is calculated by the following equation: The hot-swap function is designed to limit the inrush current charged to the bulk capacitor of the down stream bus converter. The current value and duration comply with the PICMG 3.0’s Inrush Transient specs. C _ HLDP Although the inrush current for bulk capacitor is under control, special attentions need to be paid to the current for EMI filter because this circuit is in front of hot-swap circuit. DS_DIM3R3400_05052014 2 * Power * T _ HLDP Vcap *Vcap Vth *Vth Where Power is the input power to the downstream DC/DC converter and 3.3V input management converter power; T_HLDP is the holdup time requirement; Vth is the minimum input voltage threshold of the downstream DC/DC converter. E-mail: [email protected] http://www.deltaww.com/dcdc P9 FEATURES AND DESIGN CONSIDERATIONS (CONTINUED) The PICMG 3.0’s requirements for the 0 Vdc transient is going to remain 5mS the fall slew rate is 50V/ms and rise slew rate 12.5 V/ms. This requirement will lead to a 8.7ms T_HLDP requirement assuming power is interrupted at -35Vdc (Vth). Considering Power is 435.85W(The downstream DC/DC converter input power is 400W/95%=421W;the 3.3V power is 3.3V*3.6A/80%=14.85W,So total power is 435.85W), Vth is 35V, Vcap=90V, C _ HLDP 2 * 435.85 * 8.7 1103(uF ) 902 352 When the input voltage is at the threshold of discharge, C_HLDP will go off line and the charge pump will recharge it . External Hold Up Trim Resistor Rtrim is the external hold-up trim resistance for a given desired nominal hold-up capacitor charge voltage (Vcap), the detailed equation is R trim 500000 10000() Vhu 50 Over-Current Protection DIM3R3400 provides over current protection levels to protect downstream DC/DC converter over power rating. When the downstream DC/DC converter over power rating and caused our output current exceeds the current limit level, the module will shut down immediately. After a fixed delay time, the module will try to restart. Then it will go through the restarting procedure. Transient Over Voltage Protection The PICMG 3.0 requires the module work normally under 100V/10μS input voltage transient. DIM3R3400 can meet the requirement. An internal TVS with 80V/1500W peak pulse power rating will suppress the 100V transient voltage. For the 100V pulse voltage, the power train impedance will damp it below internal components rating without shut down the module. Management Power(3.3V) and Blue_LED Power(5.0V) The module contains two isolated DC output. The first output provides up to 3.3V/3.6A management power (reference to LOGIC_GND). This power is used to power the IPM controller for the ATCA board or to power up system controller for other applications. The second isolated output, 5V/150mA, is used to power the Blue LED per PICMG 3.0 requirement. The management power is available as soon as the input voltage levels are within –36Vdc to –75Vdc. short circuit and over voltage protected are built in it. The module will going into hiccup mode when OCP or short happened. The output voltage will keep a constant when over voltage happened, and the value is the ovp point. No additional output capacitors are required, but a 22µF tantalum/ceramic and a 0.01µF to 0.1µF ceramic capacitors are highly recommended to reduce the switching ripple and noise. Higher output capacitance may be required in case of large input line or output load transient conditions. A/B Feed / Fuse Alarm (-48V_ALARM) The input feeds A and B are monitored. The module will send an opto-isolated signal if any of the feed is below the voltage threshold (typical 38.4V). Therefore, the loss of any A or B feed can be detected. The opto coupler transistor on state indicates a normal status and off state indicates a fault condition. Input Under Voltage Lockout The input under-voltage lockout prevents the module from being damaged by low input voltage. When the input voltage is lower than its threshold voltage, the module will be turned off. The lockout occurs between -26V to -28V. DS_DIM3R3400_05052014 E-mail: [email protected] http://www.deltaww.com/dcdc P10 I2C DATA REPORTING INTERFACE: I2C PROTOCOL: The module has a digital I2C Serial interface to allow the module to be monitored by the system. The module supports 3 I2C signal lines, Data, Clock and 1 Address line I2C_ADR. the Delta I2C Serial Interface monitors 5 analog parameters and 6 status bits. The actual analog parameter values are calculated by multiplying by the specified scaling factors (see table1). The status bits are interpreted in Table 2. The initial value of all registers is zero. Data in the registers begins updating 300ms after management power startup, and continues updating at approximately 100ms intervals during steady-state operation. All registers are updated simultaneously. The I2C_DAT and the I2C_CLK have been pull high to internal 3.3V. To begin communication, a master device starts out in Master Transmit mode. The master device sends out a Start bit followed by the address byte of the slave it intends to communicate with. This is followed by a single Read/Write bit, which determines whether the master intends to transmit to or receive data from the slave device. If the requested slave exists on the bus, it will respond with an Acknowledge bit, otherwise known as an ACK. The master then continues in either Transmit mode or Receive mode and the slave continues in the complement, either in Receive mode or Transmit mode, respectively. A Start bit is indicated by a high-to-low transition of the SDAx line while the SCLx line is held high. Address and data bytes are sent out, Most Significant bit (MSb) first. The Read/Write bit is sent out as a logical one when the master intends to read data from the slave, and is sent out as a logical zero when it intends to write data to the slave. If the master intends to read from the slave, then it repeatedly receives a byte of data from the slave, and responds after each byte with an ACK bit. In this example, the master device is in Master Receive mode and the slave is Slave Transmit mode. Table 1: Internal register memory map. On the last byte of data communicated, the master device may end the transmission by sending a Stop bit. If the master device is in Receive mode, it sends the Stop bit in place of the last ACK bit. A Stop bit is indicated by a low-to-high transition of the SDAx line while the SCLx line is held high. Reading from any internal register of the Delta monitor requires that an internal register, Data_Pointer, be initialized prior to reading (see Figure 16). Figure 16: Typical I2C read transmission. Note: S = START, W = WRITE, R = READ, AK = acknowledged, NACK = NOT acknowledged, P = STOP. Clear boxed originate in the I2C Master and shaded boxed originate in the I2C Slave. Table 2: The status byte represents 6 different digital signals and their digital state. Note: 1)Bit0=>LSB, Bit7=>MSB DS_DIM3R3400_05052014 E-mail: [email protected] http://www.deltaww.com/dcdc P11 I2C PROTOCOL: I2CADRESS SELECTION: Data_Pointer is write-only. It is written from the second byte of any I2C WRITE message (the first byte is the 7 bit I2C Address and the R/W bit). Subsequent data bytes in a WRITE message (3rd Byte and beyond) only increment Data_Pointer. The three bits (xyz) of the I2C Address are set with a single external resistor from the I2C_ADR (pin10) to LOGIC_GND (pin13). The 8 possible addresses are shown in Table4 with the respective resistance values. Any READ message will return the value of the internal register referenced by Data_Pointer and increments Data_Pointer by one. For instance, if the master acknowledges (AK), the next internal register referenced by Data_Pointer will be returned and Data_Pointer will be incremented by one. This process is repeated until the master does not acknowledge (NACK) and issues a STOP bit. Data_Pointer is an 8bit value. It is initialized to 00h at reset, and after reaching FFh, it will not overflow. Writing to registers not defined in Table1 has no effect. Reading from these undefined registers will return 00h. In both cases Data_Pointer is incremented. Table 4: I2C address selection Example from the point of view of the I2C Master: 1) START transmission. 2) Send 52h (addresses unit for writing, given address 52h was selected as shown in Table 4). 3) Send 1Eh (loads 1Eh into Data_Pointer). 4) STOP transmission. 5) START next transmission. 6) Send 53h (addresses unit for reading). 7) Unit will respond with the value of Status Bits (register 1Eh as shown in Table 1). 8) ACK (Data_Pointer is automatically incremented to 1Fh). 9) Unit will respond with the value of HU_CAP (register 1Fh). 10) NACK. 11) Stop Transmission. I2C ADDRESS STRUCTURE: 7 bit I2C Address + R/W bit Four bits are fixed (0101), three bits (xyz) are variable, and the least-significant bit is the read/write bit. Table 3: I2C address structure. DS_DIM3R3400_05052014 E-mail: [email protected] http://www.deltaww.com/dcdc P12 THERMAL CURVES THERMAL CONSIDERATIONS HOT SPOT Thermal management is an important part of the system design. To ensure proper, reliable operation, sufficient cooling of the power module is needed over the entire temperature range of the module. Convection cooling is usually the dominant mode of heat transfer. Hence, the choice of equipment to characterize the thermal performance of the power module is a wind tunnel. Thermal Testing Setup NTC RESISTOR Delta’s DC/DC power modules are characterized in heated vertical wind tunnels that simulate the thermal environments encountered in most electronics equipment. This type of equipment commonly uses vertically mounted circuit cards in cabinet racks in which the power modules are mounted. AIRFLOW Figure 13: * Hot spot& NTC resistor temperature measured points. The allowed maximum hot spot temperature is defined at 115℃ DIM3R3400SFA Output Current vs. Ambient Temperature and Air Velocity @Vin = 48V Vout [email protected]/1.5A (Transverse Orientation) Output Current (A) 9 The following figure shows the wind tunnel characterization setup. The power module is mounted on a 185mmX185mm,70μm (2Oz),6 layers test PWB and is vertically positioned within the wind tunnel. The space between the neighboring PWB and the top of the power module is constantly kept at 6.35mm (0.25’’). 8 7 6 100LFM 200LFM 5 300LFM 4 400LFM 3 PWB FANCING PWB 500LFM 2 MODULE 600LFM 1 0 25 50.8(2.00") AIR VELOCITY AND AMBIENT TEMPERATURE SURED BELOW THE MODULE 30 35 40 45 50 55 60 65 70 75 80 85 Ambient Temperature (℃) Figure 14: Output current vs. ambient temperature and air velocity @Vin=48V,[email protected]/1.5A (Transverse Orientation, Airflow from Vin- to Vin+) Output Current (A) DIM3R3400SFA Output Current vs. Ambient Temperature and Air Velocity @Vin = 48V Vout=3.3V@48V/4A (Transverse Orientation) 4.0 AIR FLOW 3.5 3.0 Note: Wind Tunnel Test Setup Figure Dimensions are in millimeters and (Inches) 100LFM 2.5 200LFM 2.0 Figure 12: Wind tunnel test setup Thermal Derating Heat can be removed by increasing airflow over the module. To enhance system reliability, the power module should always be operated below the maximum operating temperature. If the temperature exceeds the maximum module temperature, reliability of the unit may be affected. DS_DIM3R3400_05052014 300LFM 1.5 400LFM 1.0 0.5 0.0 25 30 35 40 45 50 55 60 65 70 75 80 85 Ambient Temperature (℃) Figure 15: Output current vs. ambient temperature and air velocity @Vin=48V,Vout=3.3V@48V/4A (Transverse Orientation, Airflow from Vin- to Vin+) E-mail: [email protected] http://www.deltaww.com/dcdc P13 MECHANICAL DRAWING Pin No 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 Name Function -48V_A -48V_B VRTN_A VRTN_B ENABLE_A ENABLE_B SHELF_GND 5.0V 3.3V I2C_ADDRESS I2C_DATA I2C_CLOCK LOGIC_GND ALARM -48V_OUT HU_Trim VRTN_OUT HU_CAP -48V_A Feed (Externally Fused) -48V_B Feed (Externally Fused) VRTN_AF Feed (Externally Fused) VRTN_BF Feed (Externally Fused) ENABLE_AF Feed (Externally Fused) (Short Res, connected to VRTN_A on the back plane) ENABLE_BF Feed (Externally Fused) (Short Res, connected to VRTN_B on the back plane) Shelf / Chassis / Safety Ground 5V Isolated Power output (reference to LOGIC_GND) 3.3V Isolated Output (reference to LOGIC_GND) I2C Address Input (reference to LOGIC_GND) I2C data (reference to LOGIC_GND) I2C clock (reference to LOGIC_GN) Logic / Secondary / Isolated Ground Opto-isolated -48V A/B Feed Loss or Open Fuse Alarm (reference to LOGIC_GND) OR’d and Inrush Protected –48V Output Bus ((Negative output to payload power converter)) Hold Up cap voltage trim OR’d and Inrush Protected VRTN Output Bus (Positive output to payload power converter) Holdup/Bulk capacitor output voltage (Negative Connection to -48V_OUT) Pin Specification: Pins 1-18 1.00mm (0.040”) diameter All pins are copper alloy with Matte Sn over Ni plating. DS_DIM3R3400_05052014 E-mail: [email protected] http://www.deltaww.com/dcdc P14 RECOMMENDED PAD LAYOUT DS_DIM3R3400_05052014 E-mail: [email protected] http://www.deltaww.com/dcdc P15 PART NUMBERING SYSTEM DIM 3R3 400 S Product Series Management Power Output Power Pin Length DIM - ATCA Input Module 3R3 - with 3.3V 400 -400W S - 0.145” F A Option code F- RoHS 6/6 A - Standard Functions (Lead Free) MODEL LIST MODEL NAME DIM3R3400SFA INPUT 36V~75V Main OUTPUT 1 OUTPUT 2 Management Power OUTPUT 3 Blue LED Power Eff @ 400W Main Po 36V~75V 3.3V/3.6A 5V/0.15A 98.2％ 400W CONTACT: www.deltaww.com/dcdc USA: Telephone: East Coast: 978-656-3993 West Coast: 510-668-5100 Fax: (978) 656 3964 Email: [email protected] Europe: Phone: +31-20-655-0967 Fax: +31-20-655-0999 Email: [email protected] Asia & the rest of world: Telephone: +886 3 4526107 ext 6220~6224 Fax: +886 3 4513485 Email: [email protected] WARRANTY Delta offers a two (2) year limited warranty. Complete warranty information is listed on our web site or is available upon request from Delta. Information furnished by Delta is believed to be accurate and reliable. However, no responsibility is assumed by Delta for its use, nor for any infringements of patents or other rights of third parties, which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Delta. Delta reserves the right to revise these specifications DS_DIM3R3400_05052014 E-mail: [email protected] http://www.deltaww.com/dcdc P16