+a x: > sammie ( LAMBDA ADVANCED ANALOG INC.A PRELIMINARY DESCRIPTION The ATW2800D Series of DC/DC converters feature high power density and an extended temperature range for use in military and industrial applications. Designed to meet the nominal input requirements of MIL-STD-704D, these devices have nominal 28 Vpc inputs with +12 V and +15 V dual outputs to satisfy a wide range of requirements. The circuit design incorporates a pulse width modulated push-pull topology operating in the feed-forward mode at a nominal switching frequency of 270 kHz. Input to output isolation is achieved through the use of transformers in the forward and feedback circuits. The advanced feedback design provides fast loop response for superior line and load transient characteristics and offers greater reliability and radiation tolerance than devices incorporating optical feedback circuits. Three standard temperature grades are offered. Refer to Part Number section. They are provided in a flanged package for more severe environments. These converters are manufactured in a facility fully qualified to MIL-STD-1772. All processes used to manufacture these converters have been qualified to enable Advanced Analog to deliver compliant devices. Three screening grades are available to satisfy a wide range of requirements. The CH grade converters are fully compliant to MIL-STD-1772 class H. The HB grade converters are processed to full class H screening but do not have class H element evaluation as required by MIL-STD-1772. Both grades are fully tested and operate over the full military temperature range without derating of output power. Variations in electrical, mechanical and screening can be accommodated. Extensive computer simulation using complex modeling enables rapid design modification to be provided. Contact Advanced Analog with specific requirements. ATW2800D Series Hybrid - High Reliability DC/DC Converters FEATURES @ 18 - 40 Voc input range (28 Voc nominal) @ +12 V and +15 V outputs available @ Indefinite short circuit and overload protection 22.8 W/in power density @ 30 watts output power g Fast loop response for superior transient characteristics m Operating temperature range from -55C - +125C available Popular industry standard pinout Resistance seam welded case for superior long term hermeticity Efficiencies up to 85% Shutdown from external signal Full military screening 200,000 hour MTBF at 85C ML-STD-1772 compliant versions availableSPECIFICATIONS TCASE = -55C to +85C, VIN = +28 V +5% unless otherwise specified. ABSOLUTE MAXIMUM RATINGS Input Voltage -0.5 V to +50 V Power Output Internally limited, 33 W typical Soldering 300C for 10 seconds Temperature Range Operating -55C +115C case Storage -65C +135C ATW2812D ATW2815D Parameter Conditions Min Typ Max Min Typ Max | Units STATIC CHARACTERISTICS OUTPUT VIN = 18 to 40 Voc Voltage louT = Min. to Full Load 411.76 | 412.00 | +12.24 | +14.70 | +15.00 |+15.30 | Voc Current* 0.25 2.5 0.2 2.0 Apc Ripple Full Load, DC to 1 MHz 35 85 45 85 mV p-p Accuracy TcCasE = 25C, Full Load 411.88 | +12.00 | +12.12 | 414.85 | 415.00 |+15.15 | Voc Power 30 30 WwW REGULATION Line VIN = 18 to 40 Voc 75 75 mV Load lout = Min. to 30 W 150 150 mV Cross +2.0 +2.0 % INPUT Voltage Range 18.0 28.0 40.0 18.0 28.0 40.0 Vpc Current No Load 35 60 35 60 mApc Inhibited 18 18 mApbc Ripple Current Full Load 15 50 15 50 mA p-p EFFICIENCY TCASE = +25C VIN = 18 to 40 Voc 80 80 % Half Load to Full Load CAPACITIVE LOAD No effect on performance 200 200 HF LOAD FAULT POWER Overload 12 12 Ww DISSIPATION Short Circuit 9 9 Ww ISOLATION Input to Output @ 500 Voc 100 100 MQ DYNAMIC CHARACTERISTICS STEP LOAD CHANGES Output 50% Load + 100% Load +300 + 300 mVpk Transient Min. Load 50% Load -800 -800 mVpk 50% Load > Min. Load +800 +800 mVpk Recovery 50% Load <> 100% Load 200 200 Ls Min. Load > 50% Load 500 500 us 50% Load Min. Load 5 5 ms STEP LINE CHANGES Output Input step 18 to 40 Voc +180 +180 mVpk Transient Input step 40 to 18 Voc -600 -600 mVpk Recovery Input step 18 to 40 Voc 400 400 Hs Input step 40 to 18 Voc 400 400 us TURN-ON Vin = 18 to 40 Voc Overshoot lout = Min. to 30 W 300 600 300 750 mVpk Delay* 8 12 8 12 ms LOAD FAULT RECOVERY VIN = 18 to 40 Voc 8 12 8 12 ms Weight Flange 75 75 Grams Notes: 1. Above +85C case, derate output power linearly to 0 +115C case. 2. Recovery time is measured from the initiation of the transient to where Vout has returned to within +1% of VouT at 50% load. 3. Turn-on delay time measurement is for either an application of power at the input or a signal at the shutdown pin. 4. Up to 90% of full power is available from either output provided the total output does not exceed 30 watts. 5. Load current split equally between +VouT and -VourT. 6. 3 W load on output under test, 3 W to 27 W on other output.SPECIFICATIONS TCASE = -55C to +105C, VIN = +28 V +5% unless otherwise specified. ABSOLUTE MAXIMUM RATINGS Input Voltage -0.5 V to +50 V Power Output Internally limited, 33 W typical Soldering 300C for 10 seconds Temperature Range Operating -55C +125C case Storage -65C +135C ATW2812D/ES ATW2815D/ES Parameter Conditions Min Typ Max Min Typ Max | Units STATIC CHARACTERISTICS OUTPUT VIN = 18 to 40 Voc Voltage lout = Min. to Full Load +11.76 +12.00 | +12.24 +14.70 +15.00 |4+15.30 | Voc Current* 0.25 2.5 0.2 2.0 ADC Ripple Full Load, DC to 1 MHz 35 85 45 85 mV p-p Accuracy TCASE = 25C, Full Load +11.88 +12.00 +12.12 +14.85 +15.00 [415.15 | Voc Power 30 30 WwW REGULATION Line Vin = 18 to 40 Voc 75 75 mV Load louT = Min. to 30 W 150 150 mV Cross +2.0 +2.0 % INPUT Voltage Range 18.0 28.0 40.0 18.0 28.0 40.0 Voc Current No Load 35 60 35 60 mApbc Inhibited 18 18 mApDc Ripple Current Full Load 30 50 30 60 mA p-p EFFICIENCY TCASE = +25C VIN = 18 to 40 Voc 80 80 % Half Load to Full Load CAPACITIVE LOAD No effect on performance 200 200 pF LOAD FAULT POWER Overload 12 12 Ww DISSIPATION Short Circuit 9 9 WwW ISOLATION Input to Output @ 500 Voc 100 100 Ma DYNAMIC CHARACTERISTICS STEP LOAD CHANGES Output 50% Load < 100% Load +300 + 300 mVpk Transient Min. Load 50% Load -800 -800 mVpk 50% Load Min. Load +800 +800 mVpk Recovery? 50% Load 100% Load 200 200 ys Min. Load 50% Load 500 500 us 50% Load Min. Load 5 5 ms STEP LINE CHANGES Output Input step 18 to 40 Voc +180 +180 mVpk Transient Input step 40 to 18 Voc -600 -600 mVpk Recovery? Input step 18 to 40 Voc 400 400 us Input step 40 to 18 Voc 400 400 us TURN-ON VIN = 18 to 40 Voc Overshoot louT = Min. to 30 W 300 600 300 750 mVpk Delay 8 12 8 12 ms LOAD FAULT RECOVERY VIN = 18 to 40 Voc 8 12 8 12 ms Weight Flange 75 75 Grams Notes: 1. Above +105C case, derate output power linearly to 0 +125C case. 2. Recovery time is measured from the initiation of the transient to where Vout has returned to within +1% of VouT at 50% load. 3. Turn-on delay time measurement is for either an application of power at the input or a signal at the shutdown pin. 4. Up to 90% of full power is available from either output provided the total output does not exceed 30 watts. 5, Load current split equally between +VouT and -VouT. 6. 3 W load on output under test, 3 W to 27 W on other output.SPECIFICATIONS Tcase = -55C to +125C, VIN = +28 V +5% unless otherwise specified. ABSOLUTE MAXIMUM RATINGS Input Voltage Power Output Soldering -0.5 V to +50 V Internaily limited, 33 W typical 300C for 10 seconds Temperature Range Operating -55C +135C case Storage -65C +135C ATW2812D/HB ATW2815D/HB Parameter Conditions Min Typ Max Min Typ Max | Units STATIC CHARACTERISTICS OUTPUT VIN = 18 to 40 Voc Voltage lout = Min. to Full Load 411.76 | 412.00 | +12.24 | +14.70 | 415.00 |+15.30 | Voc Current? 0.25 2.5 0.2 2.0 Apc Ripple Full Load, DC to 1 MHz 35 85 45 85 mV p-p Accuracy TCASE = 28C, Full Load 411.88 | 412.00 | 412.12 | +1485 | #15.00 |+15.15 | Voc Power 30 30 WwW REGULATION Line Vin = 18 to 40 Voc 75 75 mV Load> louT = Min. to 30 W 150 150 mV Cross +2.0 +3.5 +2.0 +3.2 % INPUT Voltage Range 18.0 28.0 40.0 18.0 28.0 40.0 Voc Current No Load 35 50 35 50 mApDc Inhibited 18 18 mADC Ripple Current Full Load 15 50 15 60 mA p-p EFFICIENCY TCASE = +25C VIN = 18 to 40 Vpc 80 80 % Half Load to Full Load CAPACITIVE LOAD No effect on performance 200 200 HF LOAD FAULT POWER Overload 12 12 W DISSIPATION Short Circuit 9 9 Ww ISOLATION Input to Output @ 500 Voc 100 100 MQ DYNAMIC CHARACTERISTICS STEP LOAD CHANGES Output 50% Load > 100% Load +300 +400 +300 [+400 mVpk Transient Min. Load + 50% Load -800 -800 mVpk 50% Load Min. Load +800 +800 mVpk Recovery? 50% Load > 100% Load 200 200 us Min. Load - 50% Load 500 1000 500 {1000 us 50% Load - Min. Load 5 5 ms STEP LINE CHANGES Output Input step 18 to 40 Voc +180 +180 mVpk Transient Input step 40 to 18 Voc -600 -600 mVpk Recovery Input step 18 to 40 Voc 400 400 us Input step 40 to 18 Voc 400 400 us TURN-ON VIN = 18 to 40 Voc Overshoot lout = Min. to 30 W 300 600 300 750 mVpk Delay 8 12 8 12 ms LOAD FAULT RECOVERY VIN = 18 to 40 Voc 8 12 8 12 ms Weight Flange 75 75 Grams Notes: 1. Above +125C case, derate output power linearly to 0 +135C case. 2. Recovery time is measured from the initiation of the transient to where Vout has returned to within +1% of VouT at 50% load. 3. Turn-on delay time measurement is for either an application of power at the input or a signal at the shutdown pin. 4. Up to 90% of full power is available from either output provided the total output does not exceed 30 watts. 5. Load current split equally between +Vout and -VouT. 6. 3 W load on output under test, 3 W to 27 W on other output.BLOCK DIAGRAM INPUT FILTER CONTROLLER we t OUTPUT FILTER 3 C2) PIN DESIGNATION Pin 1 Positive input Pin 10 Pin 2 N/C standard or Pin 9 Synchronization (optional) Pin 3 Positive output Pin 8 Pin 4 Output common Pin 7 Pin 5 Negative output Pin 6 MECHANICAL OUTLINE 2.700 |g. _" Se (68.580) 2.360_ (59.944) ~ _ 1.950 > 0.050 max (49.530) | (1.397) Input common N/C Inhibit Case ground N/C 0.162D 2 (4.115) fT TY | |__4x0,400 = 1,600 _.| (10.160) (40.640) To 0.500 max (12.700) places 0.0400 x 0.260L (1.016) (6.604)PART NUMBER ATW 28 xx D/ x ~ xxx Model | | Synchronization Option Omit for standard Input Voltage MSTR Master SLV Slave Output Voltage 1212 Voc Temperature Range 1515 Voc Omit for -55C to +85C ES -55C to +105C Dual Output HB -55C to +125C CH -55C to +125C Available Screening Levels and Process Variations for ATW 2800D Series Requirement MIL-STD-883 method! No Suffix ES Suffix HB Suffix CH Suffix Temperature Range -55C to +85C |-55C to +115C | -55C to +125C | -55C to +125C Element Evaluation MIL-H-38534 Internal Visual 2017 Sd Vv Vv v Temperature Cycle 1010, Cond C Cond A Vv v Constant Acceleration 2001, Cond A 500g 5,000g 5,000g Burn-in 1015 86hrs @105C 160hrs @ 125C 160hrs @ 125C Final Electrical (Group A) Specification 25C 25C -55, +25, +125C | -55,+25, +125C Seal, Fine & Gross 1014 Vv v v External Visual 2009 Vv Vv @ per Commercial Standards STANDARDIZED MILITARY DRAWING CROSS REFERENCE Standardized Vendor Vendor military drawing CAGE similar PIN number PIN 5962-9161301HZX 52467 ATW2815D/CH 5962-9161302HZX 52467 ATW2815D/CH-SLV 5962-9161303HZX 52467 ATW2815D/CH-MSTRAPPLICATION INFORMATION Device Synchronization Whenever multiple DC/DC converters are utilized in a single system, significant low frequency noise may be generated due to slight differences in the switching frequencies of the converters (beat frequency noise). Because of the low frequency nature of this noise (typically less than 10 kHz), it is difficult to filter out and may interfere with proper operation of sensitive systems (communi- cations, radar or telemetry). Advanced Analog of- fers an option which provides synchronization of multiple AHE/ATW type converters, thus eliminat- ing this type of noise. To take advantage of this capability, the system designer must assign one of the converters as the master. Then, by definition, the remaining con- verters become slaves and will operate at the masters switching frequency. The user should be aware that the synchronization system is fail- safe; that is, the slaves wil! continue operating should the master frequency be interrupted for any reason. The layout must be such that the synchronization output (pin 2) of the master de- vice is connected to the synchronization input (pin 2) of each slave device. It is advisable to keep this run short to minimize the possibility of radiat- ing the 250 kHz switching frequency. The appropriate parts must be ordered to utilize this feature. After selecting the converters re- quired for the system, a MSTR suffix is added for the master converter part number and a SLV suf- fix is added for slave part number. See Part Num- ber section. 1 2 sy ATW2805S/ES-MSTR FILTER 10 2B05S/ES-MSTR 14 Cony _ i? 4 AaTW2e150/ES-SLV ni +18 10 SLAVE 5 Nn SYSTEM Bus 5 ATW2812S/ES-SLV [ +12 10 SLAVE + COMM [| YP Tpyical Synchronization Connection Diagram Inhibit Function Connecting the inhibit input (Pin 8) to input com- mon (Pin 10) will cause the converter to shut down. It is recommended that the inhibit pin be driven by an open collector device capable of sinking at least 400 A of current. The open cir- cuit voltage of the inhibit input is 11.5 +1 Voc. EMI Filter An optional EMI filter (AFC461) will reduce the in- put ripple current to levels below the limits im- posed by MIL-STD-461B CEOS. The information in this data sheet has been carefully checked and 1s believed to be accurate, however, Lambda Advanced Analog no responsibility is assumed for possible errors. The specitications are subject to change without notice. 9517 LAMBDA ADVANCED ANALOG ING.A 2270 Martin Avenue MIL-STD-1772 Santa Clara CA 95050-2781 Qualified (408) 988-4930 FAX (408) 988-2702