DGQ25A FEATURES Digital controller with auto compensation PMBus compatibility Fast transient response High efficiency: 93.7% @12Vin, 3.3V/25A out Size: 22.9x12.7x10.2mm(0.90”x0.50”x0.40”) Surface mount No minimum load required Wide input range:8V~12.8V Pre-bias start up Output voltage programmable from 0.7Vdc to 3.3Vdc via external resistors or PMBUS command. Default fixed frequency operation:600kHz Frequency can be synchronized with an external clock Input UVLO,OVP, Output OVP, OTP, OCP, SCP Remote ON/OFF Multiple modules parallel operation ISO 9000, TL 9000, ISO 14001 certified manufacturing facility Delphi Series DGQ25A, Non-Isolated, Digital Smart DC/DC Power Module: 8.0~12.8Vin, 0.7Vo~3.3Vo, 25A Iout The DGQ25A, 8.0~12.8V wide input, single output, non-isolated smart power module is the latest offering from a world leader in power systems technology and manufacturing -- Delta Electronics, Inc. DGQ25A is a digital module that can achieve high efficiency, automatic compensation, fast transient response, PMBus communication and parallel operation. It can provide a programmable output voltage from 0.7V to 3.3V by using an external resistor or through PMBus command. It provides a highly efficient, high power and current density and very cost effective power module solution. With creative design technology and optimization of component placement, these converters possess outstanding electrical and thermal performance, as well as extremely high reliability under highly stressful operating conditions. DS_ DGQ25A _03122014 UL/cUL 60950-1 (US & Canada) recognized APPLICATIONS Telecom / DataCom Distributed power architectures Servers and workstations LAN / WAN applications Data processing applications E-mail: [email protected] http://www.deltaww.com/dcdc P1 Ta = 25°C, airflow rate = 200 LFM, Vin=12Vdc nominal, Io.max=25A , single module operation unless otherwise noted. TECHNICAL SPECIFICATIONS PARAMETER NOTES and CONDITIONS DGQ25A Min. ABSOLUTE MAXIMUM RATINGS Input Voltage (Continuous) Operating Ambient Temperature Storage Temperature INPUT CHARACTERISTICS Operating Input Voltage Maximum Input Current No-Load Input Current Off Converter Input Current ON/OFF Control Logic High Voltage Logic Low Voltage OUTPUT CHARACTERISTICS Output Voltage Adjustable Range Output Voltage Set Point Line regulation Load regulation Output voltage tolerance Output Voltage Ripple and Noise Vo=0.7V Vo=1.2V Vo=1.8V Vo=3.3V Output Current Range(Io.max) DYNAMIC CHARACTERISTICS Dynamic Load Response Vo=0.7V Vo=1.2V Vo=1.8V Vo=3.3V Setting Time to 1% of Peak Devitation EFFICIENCY Vo=0.7V Vo=1.2V Vo=1.8V Vo=3.3V EXTERNAL CAPACITANCE Input Capacitance Output Capacitance TURN ON/OFF Delay time Output Rise Time Max. Units 16 85 150 Vdc °C °C 12.8 9.5 120 20 V A mA mA 2.4 -0.3 4 0.8 V V 0.7 -1 3.3 1 -0.3 -40 -40 With appropriate air flow and derating 8.0 Current sense accuracy Number of paralleled modules Current sharing accuracy of paralleled operation GENERAL SPECIFICATIONS MTBF Weight DS_ DGQ25A_03122014 12 Vin=9.6V, Vout=3.3V, Io= Io,max Vin=12V, Vout=3.3V, Io=0A Module On Module Off VIN = 12V, Load = 50%, VIN = 8V~12.8V Load =0~25A, Over all rated input voltage, load, and temperature conditions to end of life 20MHz bandwidth, with 500uF ceramic capacitor -2 2 V %Vo.set Vo,set %Vo.set Vo,set %Vo.set Vo,set %Vo.set 0 20 35 35 45 25 mVp-p mVp-p mVp-p mVp-p A -15 -9.5 -7 -4.5 15 9.5 7 4.5 30 % Vo,set % Vo,set % Vo,set % Vo,set µs 81.4 87.2 90.2 93.7 % % % % ±0.6 ±1 With 850uF ceramic co, Io slew rate =1A/µs, Io from 25% to 75% to 25% of Io.max Vin=12V, Io=Io.max Vin=12V, Io= Io.max Vin=12V, Io= Io.max Vin=12V, Io= Io.max External Input Capacitance is typically 70% Ta and 30% ceramic External Output Capacitance is typically 100% ceramic, X7R,1206 case or smaller 44 500 Defined as time between enable and Vout rising to 10% of final value For single module operation For multiple modules parallel operation 2000 2000 µF µF 4 60 ms ms 4 10 ms ms % Vo,set Defined as time between Vout at 10% of final value and Vout at 90% of final value. For single module operation For multiple modules parallel operation Turn-On Over-shoot Start up tuning signal spec Duration time(single phase operation) Duration time(parallel operation) Tuning signal peak to peak amplitudes Vo=0.7V Vo=1.2V Vo=1.8V Vo=3.3V PROTECTION Input Over Voltage Input Under-Voltage Lockout Turn-On Voltage Threshold Turn-Off Voltage Threshold Output Over Voltage Output DC Current-Limit Inception Over-Temperature Shutdown FEATURE CHARACTERISTICS Switching Frequency Typ. 2 The controller need start-up adaptive tuning signal for auto compensation Time from vo reach to 100% regulation level to the end of the tuning signal Time from vo reach to 100% regulation level to the end of the tuning signal signal Includes switching ripples and steady sate noise, doesn’t include regulation errors. signal 11 17 -2.5 -2.5 -2.5 -2 Hiccup mode ms ms 2.5 2.5 2.5 2 14 7.0 6.0 Shutdown mode Hiccup mode Hiccup mode 7.5 6.5 130 120 120 V 8.0 7.0 600 Io=10A ~25A Io=0A~10A Vin=12V,Io=80% of Io,max, Ta=25℃ % Vo,set % Vo,set % Vo,set % Vo,set -2% -3.5% 2% 3.5% 4 -10% +10% 1 7.5 V V %Vo.set % Io.max °C kHz %Io %Io %Io M hours grams Email: [email protected] http://www.deltaww.com/dcdc P2 . ELECTRICAL CHARACTERISTICS CURVES(SINGLE MODULE OPERATION) Figure 1: Converter efficiency vs. output current (0.7V output voltage) Figure 2: Converter efficiency vs. output current (1.2V output voltage) Figure 3: Converter efficiency vs. output current (1.8V output voltage) Figure 4: Converter efficiency vs. output current (3.3V output voltage) Figure 5: Output ripple & noise at Vin=12V,Vout=0.7V, Iout=25A, 2uS/div, 5mV/div. Figure 6: Output ripple & noise at Vin=12V,Vout=1.2V, Iout=25A, 2uS/div, 10mV/div. DS_ DGQ25A_03122014 Email: [email protected] http://www.deltaww.com/dcdc P3 Figure 7: Output ripple & noise at Vin=12V,Vout=1.8V, Iout=25A, 2uS/div, 10mV/div. Figure 8: Output ripple & noise at Vin=12V,Vout=3.3V, Iout=25A, 2uS/div, 10mV/div. Figure 9: Output voltage response to step-change in load current (25%-75%-25% of full load at Vin=12V Vo=0.7V; 100mV/div, 200uS/div, di/dt =2.5A/µs; 500uF ceramic Cout) Figure 10: Output voltage response to step-change in load current (25%-75%-25% of full load at Vin=12V Vo=1.2V; 100mV/div, 200uS/div, di/dt =2.5A/µs; 500uF ceramic Cout) Figure 11: Output voltage response to step-change in load current (25%-75%-25% of full load at Vin=12V Vo=1.8V; 100mV/div, 200uS/div, di/dt =2.5A/µs; 500uF ceramic Cout) Figure 12: Output voltage response to step-change in load current (25%-75%-25% of full load at Vin=12V Vo=3.3V; 100mV/div, 200uS/div, di/dt =2.5A/µs; 500uF ceramic Cout) DS_ DGQ25A_03122014 Email: [email protected] http://www.deltaww.com/dcdc P4 Figure 13: Turn on by enable at Vin=12V, Vout=0.7V/25A. Top Trace: Enable, 2V/div; Bottom Trace: Vout,0.2V/div; Time: 2ms/div. Figure 15: Turn on by enable at Vin=12V, Vout=1.8V/25A. Top Trace: Enable, 2V/div; Bottom Trace: Vout,0.5V/div; Time: 2ms/div. Figure 17: Turn off by enable at Vin=12V, Vout=0.7V/25A. Top Trace: Enable, 2V/div; Bottom Trace: Vout,0.5V/div; Time: 2ms/div. DS_ DGQ25A_03122014 Figure 14: Turn on by enable at Vin=12V, Vout=1.2V/25A. Top Trace: Enable, 2V/div; Bottom Trace: Vout,0.5V/div; Time: 2ms/div. Figure 16: Turn on by enable at Vin=12V, Vout=3.3V/25A. Top Trace: Enable, 2V/div; Bottom Trace: Vout,1V/div; Time: 2ms/div. Figure 18: Turn off by enable at Vin=12V, Vout=1.2V/25A. Top Trace: Enable, 2V/div; Bottom Trace: Vout,0.5V/div; Time: 2ms/div. Email: [email protected] http://www.deltaww.com/dcdc P5 Figure 19: Turn off by enable at Vin=12V, Vout=1.8V/25A. Top Trace: Enable, 2V/div; Bottom Trace: Vout,1V/div; Time: 2ms/div. DS_ DGQ25A_03122014 Figure 20: Turn off by enable at Vin=12V, Vout=3.3V/25A. Top Trace: Enable, 2V/div; Bottom Trace: Vout,1V/div; Time: 2ms/div. Email: [email protected] http://www.deltaww.com/dcdc P6 ELECTRICAL CHARACTERISTICS CURVES(4 MODULES PARALLEL OPERATION) Figure 21: Output ripple & noise at Vin=12V,Vout=0.7V, Iout=100A, 2uS/div, 5mV/div. Figure 22: Output ripple & noise at Vin=12V,Vout=1.2V, Iout=100A, 2uS/div, 10mV/div. Figure 23: Output ripple & noise at Vin=12V,Vout=1.8V, Iout=100A, 2uS/div, 10mV/div. Figure 24: Output ripple & noise at Vin=12V,Vout=3.3V, Iout=100A, 2uS/div, 10mV/div. Figure 25: Output voltage response to step-change in load current (25%-75%-25% of 100A load at Vin=12V Vo=0.7V; 50mV/div, 200uS/div, di/dt =2.5A/µs; 2000uF ceramic Cout) Figure 26: Output voltage response to step-change in load current (25%-75%-25% of 100A load at Vin=12V Vo=1.2V; 50mV/div, 200uS/div, di/dt =2.5A/µs; 2000uF ceramic Cout) DS_ DGQ25A_03122014 Email: [email protected] http://www.deltaww.com/dcdc P7 Figure 27: Output voltage response to step-change in load current (25%-75%-25% of 100A load at Vin=12V Vo=1.8V; 100mV/div, 200uS/div, di/dt =2.5A/µs; 2000uF ceramic Cout) Figure 28: Output voltage response to step-change in load current (25%-75%-25% of 100A load at Vin=12V Vo=3.3V; 100mV/div, 200uS/div, di/dt =2.5A/µs; 2000uF ceramic Cout) Figure 29: Turn on by enable at Vin=12V, Vout=0.7V/100A. Top Trace: Enable, 2V/div; Bottom Trace: Vout,0.2V/div; Time: 20ms/div. Figure 30: Turn on by enable at Vin=12V, Vout=1.2V/100A. Top Trace: Enable, 2V/div; Bottom Trace: Vout,0.5V/div; Time: 20ms/div. Figure 31: Turn on by enable at Vin=12V, Vout=1.8V/100A. Top Trace: Enable, 2V/div; Bottom Trace: Vout,1V/div; Time: 20ms/div. Figure 32: Turn on by enable at Vin=12V, Vout=3.3V/100A. Top Trace: Enable, 2V/div; Bottom Trace: Vout,1V/div; Time: 20ms/div. DS_ DGQ25A_03122014 Email: [email protected] http://www.deltaww.com/dcdc P8 Figure 33: Turn off by enable at Vin=12V, Vout=0.7V/100A. Top Trace: Enable, 2V/div; Bottom Trace: Vout,0.5V/div; Time: 2ms/div. Figure 34: Turn off by enable at Vin=12V, Vout=1.2V/100A. Top Trace: Enable, 2V/div; Bottom Trace: Vout,0.5V/div; Time: 2ms/div. Figure 35: Turn off by enable at Vin=12V, Vout=1.8V/100A. Top Trace: Enable, 2V/div; Bottom Trace: Vout,1V/div; Time: 2ms/div. Figure 36: Turn off by enable at Vin=12V, Vout=3.3V/100A. Top Trace: Enable, 2V/div; Bottom Trace: Vout,1V/div; Time: 2ms/div. DS_ DGQ25A_03122014 Email: [email protected] http://www.deltaww.com/dcdc P9 DESIGN CONFIGURATIONS The DGQ25A is designed using single-phase synchronous buck topology. It is a digital module that can achieve high efficiency, automatic compensation and fast transient response .The module has PMBus interface for system configuration, control and monitoring. The output of DGQ25A can be adjusted in the range of 0.7Vdc to 3.3Vdc by an external resistor from VSET pin to GND or through PMBUS command. The converter can be turned ON/OFF by remote control signal at ENABLE pin .Positive on/off logic at ENABLE pin will turn on the module while negative on/off logic will turn off the module. FEATURES DESCRIPTIONS Enable (On/Off) DGQ25A has positive on/off logic, pulling the pin low will turn off the unit. With the active high function, the output is guaranteed to turn on if the ENABLE pin is driven above 2.4V. The output will turn off if the ENABLE pin voltage is pulled below 0.8V. The ENABLE input can be driven in a variety of way as shown in Figures 37. The converter can protect itself by entering Hiccup mode against over current, short circuit condition. Also the module has input OVP and Input UVP function, when input return to the normal working voltage range, the module will auto restart up. The converter will shut down when an Output over voltage protection is detected, Output OVP is latch mode. The converter has an over temperature protection which can protect itself by shutting down for an over temperature event. There is a typical 25℃ hysteresis for the OTP. DGQ25A has multi-phase load-sharing function and up to 4 modules can in parallel operation. Due to the single-directional communication on SHARE pin between master and slaves, modules needs to shutdown and power on/off recycling to restart after faults (like OCP, OTP)is triggered in multiphase application. Safety Considerations It is recommended that the user to provide a very fast-acting type fuse in the input line for safety. The output voltage set point and the output current in the application could define the amperage rating of the fuse. Input Source Impedance The power module should be connected to a low ac-impedance input source. Highly inductive source impedances can affect the stability of the module. An input capacitance must be placed close to the modules input pins to filter ripple current and ensure module stability in the presence of inductive traces that supply the input voltage to the module. DS_ DGQ25A_03122014 Figure 37: Enable Input drive circuit Over-Current and Short-Circuit Protection The DGQ25A has Hiccup over-current and short circuit protection function. When over current /short condition occurs, the module goes into the Hiccup mode. When the fault condition is removed, the module will restart up. When in some serious short (much over 200% of Io.max) condition, the controller may reset due to the input and ground on the module can be fluctuating drastically when doing serious short , therefore input power and Enable signal may need to be recycled to restart up after an serious short event. Input Over Voltage Protection (OVP) and UVLO The DGQ25A has input over voltage protection function. When input over voltage occurs, the module will shut down. When the input over voltage condition is removed, the module will restart up. Also, the converter has UVLO function at input. When input voltage is below turn-off threshold, the module will shut down and can restart up when input voltage is above turn-on threshold. Output Over Voltage Protection (OVP) The converter will shut down when an output over voltage protection is detected. Once the OVP condition is detected, controller will latch off and can only restart up by recycle input voltage or recycle ON/OFF. Email: [email protected] http://www.deltaww.com/dcdc P10 FEATURES DESCRIPTIONS FEATURES DESCRIPTIONS (CON.) Over-Temperature Protection Remote Sense Single module operation: The over-temperature protection prevents the module from thermal damage. If the temperature exceeds the over-temperature threshold the module will shut down. The module will restart once the module is cooling down. There is a typical 25℃ hysteresis for the OTP. The module provides Vo remote sensing to achieve proper regulation at the load points and reduce effects of distribution losses on output line. In the event of an open remote sense line, the module shall maintain local sense regulation through an internal resistor. Paralleled operation: Because thermal performances of all modules are not exactly the same, one of the slave modules may shut down due to OTP earlier than the others. Then the left modules may go into OCP Hiccup mode. Therefore, input power and Enable signal need to be cycled for paralleled modules to restart up after an OTP event. Output Voltage Programming The output voltage of the DGQ25A can be programmed to any voltage between 0.7Vdc and 3.3Vdc by connecting one resistor (shown as Rset in Figure38) between the Rset pin(+) and GND of the module and the typical resistor values are shown in Table 1. Without this external resistor, the output voltage of the module can be adjusted through PMBUS command. Output Capacitance There is no output capacitor on the DGQ25A. Please see page 2 for suggested minimum output capacitance. Synchronization The module can be synchronized by an external clock. Synchronization is achieved by connecting a clock source to the SYNC pin. The incoming clock signal must be in the 300kHz to 1MHz range and must be stable. PMBus Communication The module has a digital PMBus interface to allow the module to be monitored, controlled and configured by the system. The module has 3 PMBus signal lines SDAT, SCLK, SALERT and 1 Address line Rsel. The module supports many standard PMBus commands as listed in the next page. Paralleling Figure 38: Adjusting Output Voltage Vout set Rset (±1%) kohm 0.7V 11.3~11.7 1.0V 51.7~52.9 1.2V 72.4~74.0 1.5V 79.7~81.5 1.8V 85.7~87.5 2.5V 92.1~94.1 3.3V 99.0~101.0 The module will support multi-phase parallel operation. In this mode, one device provides the master timing signal to which the other devices will align. The maximum number of parallel phases/modules is four. The current from each phase match within ± 10%. The SHARE pin signal is for the purpose of communicating current information between modules. When the modules in parallel operation, the SHARE pins and SYNC pins of all modules will be tied together , please refer to Figure39 for parallel operation set up. Table 1: Typical Vout set resistor values Figure 39: Schematic of modules in parallel operation DS_ DGQ25A_03122014 Email: [email protected] http://www.deltaww.com/dcdc P11 SUPPORTED PMBUS COMMANDS The main PMBus commands described in the PMBus 1.2 specification are supported by the module. Partial PMBus commands are fully supported; Partial PMBus commands have difference with the definition in PMBus 1.2 specification. All the supported PMBus commands are detail summarized in below table. Compatib le with Comman Command Transfer Command description d Code Data standard type Range Data Expon Default value Format Note limit units -ent PMBUS or not? Turn the module on or off OPERATION 0x01 R/W byte yes direct 0x40 / / / / Read byte yes direct 0x17 / / / / Send byte Yes direct / / / / / R/W byte yes direct 0 / / / / Send byte Yes direct / / / / / by PMBUS command Configures the combination of primary ON_OFF_CONFIG 0x02 on/off pin and PMBUS command Clear any fault bits that CLEAR_FAULTS 0x03 have been set control writing to the WRITE_PROTECT 0x10 PMBus devic Stores operating STORE_DEFAULT_ALL 0x11 parameters from RAM to data flash This command Restores operating RESTORE_DEFAULT_ALL 0x12 parameters from data can't be issued Write byte Yes direct / / / / flash to RAM when the power unit is running. copy the entire contents of the Operating Memory STORE_USER_ALL 0x15 to the matching locations Send byte yes direct / / / / / write byte yes direct / / / / / Read byte yes direct 0xA0 / / / / Read byte Yes 0x14 / / / / 1.2 / Volts / / in the non-volatile User store memory copy the entire contents of the non-volatile User Store RESOTRE_USER_ALL 0x16 memory to the matching locations in the Operating Memor determine some key CAPABILITY 0x19 capabilities of a PMBus device. mode+e VOUT_MODE 0x20 To read Vo data format xp VOUT_COMMAND DS_ DGQ25A_03122014 0x21 Set the output voltage R/W word Yes Vlinear Email: [email protected] http://www.deltaww.com/dcdc P12 apply a fixed offset voltage to the output VOUT_TRIM 0x21 R/W word yes Linear 0 / / / / R/W word yes Linear 0.012 / / / / R/W word yes linear 5 / / / / voltage command value apply a fixed offset voltage to the output VOUT_CAL_OFFSET 0x22 voltage command value sets an upper limit on the output voltage the unit can VOUT_MAX 0x23 command regardless of any other commands or combinations VOUT_MARGIN_HIGH 0x25 Set the output voltage R/W word Yes Vlinear 1.3 / Volts / / VOUT_MARGIN_LOW 0x26 Set the output voltage R/W word Yes Vlinear 1 / Volts / / R/W word yes Linear 0.01 / / / / R/W word yes Linear 0 / / / / R/W word yes Linear 500000 / / / / sets the rate in mV/μs at VOUT_TRANSITION_RAT 0x27 which the output should E change voltage sets the rate, in mV/A at which the output voltage VOUT_DROOP 0x28 decreases with increasing output current sets the switching FREQENCY_SWITCH 0x33 frequency, in kHz, VIN_ON should be Set the turn on voltage higher than VIN_ON 0x35 threshold of Vin under R/W word Yes Linear 7.5 / V / VIN_OFF, and voltage lockout keep 1V hystersis. VIN_ON should be Set the turn off voltage higher than VIN_OFF 0x36 threshold of Vin under R/W word Yes Linear 6.5 / V / VIN_OFF, and voltage lockout keep 1V hystersis. DS_ DGQ25A_03122014 Email: [email protected] http://www.deltaww.com/dcdc P13 arrange multiple units so that their switching INTERLEAVE 0x37 R/W word yes Direct 0 / / / / R/W word Yes Linear 0.00029 / / / / R/W word Yes Linear 0 / / / / R/W word Yes Vlinear 1.44 / V / / Direct 0x80 / N/A / / periods can be distributed in time IOUT_CAL_GAIN 0x38 Used to calibrate DCR null out any offsets in the IOUT_CAL_OFFSET 0x39 output current sensing circuit. Set the output VOUT_OV_FAULT_LIMIT 0x40 overvoltage fault threshold. Refer to Instructs what action to VOUT_OV_FAULT_RESPO below 0x41 take in response to an R/W byte NSE descriptio output overvoltage fault. n; sets the value of the output voltage at the VOUT_UV_FAULT_LIMIT 0x44 sense or output pins that R/W word yes Vlinear 0.1 / / / / to an output undervoltage R/W byte yes direct 0 / / / / causes an output undervoltage fault action to take in response VOUT_UV_FAULT_RESPO 0x45 NSE fault Must be Set the output IOUT_OC_FAULT_LIMIT 0x46 overcurrent fault greater than R/W word Yes Linear 31.5 / A / threshold. IOUT_OC_WA RN_LIMIT value Refer to Instructs what action to IOUT_OC_FAULT_RESPO below 0x47 take in response to an R/W byte NSE Bit field 0xBF / N/A / / descriptio output overcurrent fault. n; Must be Set the over temperature OT_FAULT_LIMIT 0x4F TEMP R/W word Yes fault threshold. Deg. 120 / Linear greater than / C OT_WARN_LI MIT value Instructs what action to OT_FAULT_RESPONSE 0x50 take in response to an DS_ DGQ25A_03122014 Refer to R/W byte Bit field 0XC0 / N/A / / below Email: [email protected] http://www.deltaww.com/dcdc P14 over temperature fault. descriptio n; Must be less Set a threshold causing a TEMP OT_WARN_LIMIT 0x51 temperature high R/W word Yes Deg. 95 / Linear than / C OT_FAULT_LI warning. MIT value Set the input overvoltage VIN_OV_FAULT_LIMIT 0x55 R/W word Yes Linear 14 / V / / Direct 0XC0 / N/A / / Linear 5.5 / / / / direct 0xC0 / / / / fault threshold. Refer to Instructs what action to VIN_OV_FAULT_RESPON below 0x56 take in response to an R/W byte SE descriptio input overvoltage fault. n; Refer to sets the value of the input below VIN_UV_FAULT_LIMIT 0x59 voltage that causes input R/W word descriptio undervoltage fault n; Refer to action to take VIN_UV_FAULT_RESPON below 0x5A in response to an input R/W byte SE descriptio undervoltage fault n; Sets the output voltage at which the bit 3 of POWER_GOOD_ON 0x5E R/W word Yes Vlinear 1.08 / V / / R/W word Yes Vlinear 0.98 / V / / R/W word Yes Linear 0.004 / ms / / R/W word Yes Linear 0.004 / ms / / R/W word Refer to direct 500 / / / / STATUS_WORD high byte should be asserted. Sets the output voltage at which the bit 3 of POWER_GOOD_OFF 0x5F STATUS_WORD high byte should be negated. Sets the time from a start condition is received until TON_DELAY 0x60 the output voltage starts to rise Sets the time from the output starts to rise until TON_RISE 0x61 the voltage has entered the regulation band. sets an upper limit, in TON_MAX_FAULT_LIMIT 0x62 milliseconds, on how DS_ DGQ25A_03122014 below Email: [email protected] http://www.deltaww.com/dcdc P15 long the unit can descriptio attempt to power up n the output without reaching the output undervoltage fault limit instructs the device on TON_MAX_FAULT_RESP Refer to what action to 0x63 ONSE below R/W Byte take in response to a Direct 0xBF / / / / descriptio TON_MAX fault n sets the delay time between loss of enable TOFF_DELAY 0x64 condition and the R/W word yes Linear 0 / / / / R/W word yes Linear 0.004 / / / / Read byte Yes Direct / / / / / Read word Yes Direct / / / / / Read byte Yes; Direct / / / / / Read byte Yes Direct / / / / / Read byte Yes Direct / / / / / beginning of the output ramp-down The TOFF_FALL command sets the TOFF_FALL 0x65 ramp-down time from regulation at VOUT_COMMAND to 0V returns one byte of information with a STATUS_BYTE 0x78 summary of the most critical faults Returns the information STATUS_WORD 0x79 with a summary of the module's fault/warning Returns the information of the module's output STATUS_VOUT 0x7A voltage related fault/warning Returns the information of the module's output STATUS_IOUT 0x7B current related fault/warning Returns the information of the module's input over STATUS_INPUT 0x7C voltage and under voltage fault DS_ DGQ25A_03122014 Email: [email protected] http://www.deltaww.com/dcdc P16 Returns the information of STATUS_TEMPERATURE 0x7D the module's temperature Read byte Yes Direct / / / / / Yes Direct / / / / / Direct / / / / / related fault/warning Returns the information of the module's STATUS_CML 0x7E Read byte communication related faults. Refer to returns one data byte with below STATUS_MFR_SPECIFIC 0x80 the status that Read byte descriptio manufacturer defined n; Returns the input voltage READ_VIN 0x88 Read word Yes Vlinear / / Volts / / Read word Yes Vlinear / / Volts / / Read word Yes Linear / / Amps / / Read word Yes Linear / / / / / / of the module Returns the output READ_VOUT 0x8B voltage of the module Returns the output READ_IOUT 0x8C current of the module report its internal (i.e. die) READ_TEMPERATURE_1 0x8D Deg. temperature C report external temperature as measured READ_TEMPERATURE_2 0x8E Deg. Read word by an external Yes Linear / / diode C junction READ_DUTY_CYCLE 0x94 READ_FREQUENCY 0x95 Read the duty cycle value Read word yes Linear / / % / / Read byte yes Linear / / MHz / / Read byte Yes Direct 0x42 / / / / Null / / / / Null / / / / Null / / / / Null / / / / Read the switching freqeuncy Reads the revision of the PMBUS_REVISION 0x98 PMBus MFR_ID 0x99 Read write manufacturer’s ID ASCII yes block MFR_MODEL 0x9A manufacturer’s model string Read write ASCII yes number IC_DEVICE_ID 0xAD block string the type or part number of an IC embedded within a Read write ASCII yes PMBus that is used for block string the PMBus interface MFR_REVISION 0x9B manufacturer’s Read ASCII Yes revision number DS_ DGQ25A_03122014 Write string Email: [email protected] http://www.deltaww.com/dcdc P17 Block MFR_LOCATION 0x9C Read manufacturing location ASCII Write Yes of the device Null / / / / Null / / / / Null / / / / Null / / / / string Block MFR_DATE 0x9D Read the date the device was ASCII Write Yes manufactured. string Block MFR_SERIAL 0x9E Read manufacturer’s serial ASCII Write Yes number of the device string Block IC_DEVICE_REV 0xAE the type or part number of an IC embedded within a Read ASCII Yes PMBus that is used for Block string the PMBus interface ADAPTIVE_MODE 0xD0 configures the automatic Read/Writ tuning features of the No Direct 0x024B / / / / No Linear 0.3 / / / / No Direct 0 / / / / No Direct 0 / / / / No Direct 0 / / / / No Direct 0 / / / / No Direct 0 / / / / e Word MAX15301-CCB-CCB FEEDBACK_EFFORT 0xD3 allows some user adjustment of the tradeoff between transient Read Byte response, load regulation, and output noise. MANUF_CONF 0xE0 allow password-based Read/Writ write-protection on a e Block per-command basis MANUF_LOCK 0xE1 contains the password value for the Write Word “manufacturer” PMBus command security level MANUF_PASSWD 0xE2 the “key” or password-attempt Read/Writ command used to unlock e Word the “manufacturer” security level USER_CONF 0xE3 allow password-based Read/Writ write-protection on a e Block per-command basis USER_LOCK DS_ DGQ25A_03122014 0xE4 contains the password Read Email: [email protected] http://www.deltaww.com/dcdc P18 value for the “user” Word PMBus command security level USER_PASSWD 0xE5 the “key” or password-attempt Read command used to unlock Word No Direct 0 / / / / No Direct 0 / / / / No Linear 1.5 / / / / No Direct 0 / / / / No Linear / / / / / / / / the “user” security level SECURITY_LEVEL 0xE6 shows the present security level of password Read Byte protection for all writeable PMBus commands ZETAP 0xE8 sets the damping ratio for Read/Writ the closed-loop response RESTORE_MAXIM_AL 0xEA L e Byte Load contents of the MAXIM store into working Send Byte memory EXT_TEMP_CAL 0xF8 External tempretaure 1.030000e+00, sense signal calibration R/W Block 0.0000e+00 gain and offset. SENSEFET_PARMS 0xF9 Delta Cisco output current Sense switch, offset and gain (m, b, mV/A) DS_ DGQ25A_03122014 1.0000e+000.0 R/W Block No Linear 000e+003.000 0e+01 Email: [email protected] http://www.deltaww.com/dcdc P19 THERMAL CONSIDERATIONS THERMAL CURVES 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 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. The following figure shows the wind tunnel characterization setup. The power module is mounted on a 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’’). Figure 41: * Hot spot temperature measured point. The allowed maximum hot spot temperature is defined at 115℃. DGQ25A Output Current vs. Ambient Temperature and Air Velocity @Vin = 12V, Vout =0.7V (Either Orientation) Output Current(A) 25 Natural Convection 20 100LFM 15 10 5 0 25 30 35 40 45 50 55 60 65 70 75 80 85 Ambient Temperature (℃) Figure 42: Output current vs. ambient temperature and air velocity @ Vin=12V, Vout=0.7V (Either Orientation) DGQ25A Output Current vs. Ambient Temperature and Air Velocity @Vin = 12V, Vout =1.2V (Either Orientation) Output Current(A) 25 Figure 40: 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. Natural Convection 20 100LFM 15 10 5 0 25 30 35 40 45 50 55 60 65 70 75 80 85 Ambient Temperature (℃) Figure 43: Output current vs. ambient temperature and air velocity @ Vin=12V, Vout=1.2V (Either Orientation) DS_ DGQ25A_03122014 Email: [email protected] http://www.deltaww.com/dcdc P20 THERMAL CURVES DGQ25A Output Current vs. Ambient Temperature and Air Velocity @Vin = 12V, Vout =1.8V (Either Orientation) Output Current(A) 25 Natural Convection 20 100LFM 200LFM 15 10 5 0 25 30 35 40 45 50 55 60 65 70 75 80 85 Ambient Temperature (℃) Figure 44: Output current vs. ambient temperature and air velocity @ Vin=12V, Vout=1.8V (Either Orientation) DGQ25A Output Current vs. Ambient Temperature and Air Velocity @Vin = 12V, Vout =3.3V (Either Orientation) Output Current(A) 25 Natural Convection 20 100LFM 200LFM 300LFM 15 400LFM 10 5 0 25 30 35 40 45 50 55 60 65 70 75 80 85 Ambient Temperature (℃) Figure 45: Output current vs. ambient temperature and air velocity @ Vin=12V, Vout=3.3V (Either Orientation) DS_ DGQ25A_03122014 Email: [email protected] http://www.deltaww.com/dcdc P21 MECHANICAL CONSIDERATIONS PICK AND PLACE LOCATION RECOMMENDED PAD LAYOUT SURFACE MOUNT TAPE & REEL SPEC. LABEL SPEC. LABEL SPEC. LABEL SPEC. LABEL SPEC. LABEL SPEC. LABEL SPEC. LABEL SPEC. LABEL DS_ DGQ25A_03122014 Email: [email protected] http://www.deltaww.com/dcdc P22 LEADED (SN/PB) PROCESS RECOMMEND TEMP. PROFILE Note: The temperature refers to the pin of DGQ25A, measured on the pin +Vout joint. LEAD FREE (SAC) PROCESS RECOMMEND TEMP. PROFILE Temp. Peak Temp. 240 ~ 245 ℃ 217℃ Ramp down max. 4℃/sec. 200℃ Preheat time 100~140 sec. 150℃ Time Limited 90 sec. above 217℃ Ramp up max. 3℃/sec. 25℃ Time Note: The temperature refers to the pin of DGQ25A, measured on the pin +Vout joint. DS_ DGQ25A_03122014 Email: [email protected] http://www.deltaww.com/dcdc P23 MECHANICAL DRAWING Note: All pins are copper alloy with Matte Tin plated over Ni under-plating. DS_ DGQ25A_03122014 Email: [email protected] http://www.deltaww.com/dcdc P24 PART NUMBERING SYSTEM DGQ 12 S 0A0 S 25 P Product Series Input Voltage Numbers of Outputs Output Voltage Package Type Output Current On/Off logic 12- 8.0V ~12.8V S - Single 0A0 Programmable 25 -25A P - positive (Default) DGQ – Digital 25A S - SMD F A Option Code F- RoHS 6/6 (Lead Free) A - Standard function MODEL LIST Model Name Input Voltage Output Voltage Output Current Total Height RoHS 6/6 complaint Efficiency 12Vin, 3.3Vout @ 100% load DGQ25A 8.0 ~ 12.8Vdc 0.7V ~ 3.3V 25A 10.2mm(0.4’’) Yes 93.7% 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: Telephone: +31 (0)20 655 09 67 Fax: +31 (0)20 655 09 99 Email: [email protected] Asia & the rest of world: Telephone: +886 3 4526107 x6220~6224 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 at any time, without notice. DS_ DGQ25A_03122014 Email: [email protected] http://www.deltaww.com/dcdc P25