|Category||Power Management => DC-DC Converters => Hybrid DC-DC Converters|
|Title||Hybrid DC-DC Converters|
|Description||Hi-rel DC-DC Standard Single Converter in a Atr Package|
|Company||International Rectifier Corp.|
|Datasheet||Download ATR2812S datasheet
ATR28XXS SERIES ADVANCED ANALOG HYBRID-HIGH RELIABILITY DC/DC CONVERTERS
The ATR28XXS Series of DC/DC converters feature high power density and an extended temperature range for use in military and industrial applications. Designed to MIL-STD-704D input requirements, these devices have nominal 28VDC inputs with 5V, 12V and 15V single outputs to satisfy a wide range of requirements. The circuit design incorporates a pulse width modulated single forward topology operating in the feed-forward mode at a nominal switching frequency of 550KHz. 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 with screening options. Refer to Part Number section. These devices can be provided in a standard plug-in package for PC mounting in a flanged package for more severe environments. These converters are manufactured in a facility certified to MIL-PRF-38534. All processes used to manufacture these converters have been qualified to enable Advanced Analog to deliver compliant devices. Four screening grades are available to satisfy a wide range of requirements. The CH grade converters are fully compliant to MIL-PRF-38534 for 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-PRF-38534. Both grades are fully tested to confirm operation over the full military temperature range without derating of output power. The ES version is a full temperature device without the full class H or element evaluation. The non-suffix device is a low cost
to 40 VDC Input Range (28 VDC Nominal) 5V, 12V and 15V Outputs Available n Indefinite Short Circuit and Overload Protection to 35 W/in Power Density n 30 Watt Output Power Models n Fast Loop Response for Superior Transient Characteristics n Operating Temperature Range from +125°C n Popular Industry Standard Pin-Out n Resistance Seam Welded Case for Superior Long Term Hermeticity n Ceramic Feed-thru Pins n External Synchronization n Efficiencies 84% n Shutdown from External Signal n Military Screening
limited temperature range option. 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.
ABSOLUTE MAXIMUM RATINGS Input Voltage to 50V Soldering Temperature 300°C for 10 seconds Case Temperature Operating to +125°C Storage to +135°C
Test Symbol Conditions TC +125°C VIN = 0 Unless otherwise specified IOUT = 0 VIN 16, 28, and 40 VDC VIN 16, 28, and 40 VDC B.W. to 2 MHz VIN 16, 28, and 40 VDC IOUT 0, 3000, and 6000mA VIN = 16,28, and 40 VDC IOUT 0, 3000, and 6000mA IOUT = 0, inhibit (pin 2) Tied to input return (pin 10) IOUT = 0, inhibit (pin 2) = open IOUT =6000mA B.W. to 2 MHz IOUT =6000mA Input to output or any pin to case (except pin at 500 VDC, =+25°C No effect on dc performance =+25°C 6 Overload, = +25°C Short Circuit IOUT = 6000mA IOUT 6000mA 3000mA to/from 6000mA 500mA to/from 3000mA to/from 6000mA 500mA to/from 3000mA Output response to transient 5, 9 step line changes VOTLINE Input step 16V to/from 40VDC, IOUT = 6000mA Group A Subgroups Device Types Limits Min Max mA mV p-p mV UnitsOutput voltage Output current 2 Output ripple voltage Line regulation
Power dissipation load fault Switching frequency Sync frequency range Output response to step 7 transient load changes Recovery time step 7, 8 transient load changesATR28XXS Series Table I. Electrical performance Characteristics - continued
Test Symbol Conditions TC +125°C VIN = 0 Unless otherwise specified Input step 16V to/from 40VDC, IOUT = 6000mA IOUT =0 and 6000mA IOUT =0 and 6000mA Group A Subgroups Device Types
Recovery time transient step 8, 9 line changes Turn on overshoot 10 Turn on delay 5, 10 Load fault recovery
Parameter guaranteed by line and load regulation tests. Bandwidth guaranteed by design. Tested for 20 KHz to 2 MHz. Output voltage measured at load with remote sense leads connected across load. Capacitive load may be any value from 0 to the maximum limit without compromising dc performance. A capacitive load in excess of the maximum limit will not disturb loop stability but may interfere with the operation of the load fault detection circuitry, appearing as a short circuit during turn on. 5 Parameter shall be tested as part of design characterization and after design or process changes. Thereafter parameters shall be guaranteed to the limits specified in table 6 An overload is that condition with a load in excess of the rated load but less than that necessary to trigger the short circuit protection and is the condition of maximum power dissipation. 7 Load step transition time between 2 and 10 microseconds. 8 Recovery time is measured from the initiation of the transient to where VOUT has returned to within ±1 percent of VOUT at 50 percent load. 9 Input step transition time between 2 and 10 microseconds. 10 Turn on delay time measurement is for either a step application of power at the input or the removal of a ground signal from the inhibit pin (pin 2) while power is applied to the input.
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