ISO-9001 CERTIFIED BY DSCC M.S.KENNEDY CORP. 20W DC-DC CONVERTERS BBF2800S SERIES 4707 Dey Road Liverpool, N.Y. 13088 (315) 701-6751 HI-REL DESIGN REPLACES APEX DB2800S SERIES SURFACE MOUNT MAGNETICS WELDED HERMETIC PACKAGE LOW INTERNAL TEMPERATURE GRADIENTS ALL CERAMIC CAPACITORS WITHSTANDS 5000G OTHER FEATURESSINGLE OUTPUT NO DERATING 55°C to +125°C OUTPUT VOLTAGE ADJUSTMENT STANDARD REMOTE SHUTDOWN DESCRIPTION EXTERNAL CONNECTIONS The BBF2800S series of DC-DC converters provides the ruggedness, reliability and features required to meet the advanced design challenges of today’s hi-rel market. This has been accomplished using a package having very low thermal gradients, excellent hermeticity and high voltage isolation. The use of advanced substrate and reflow soldering techniques during construction results in a rugged, cost-effective pin solderable package. The BBF2800S hybrid converter series utilizes all ceramic capacitors and surface mount magnetics to provide reliable operation at all operating temperatures while surviving very high G forces. BBF2800S series standard features include kelvin sense, indefinite short circuit protection, remote shutdown, output fault monitoring, turn on voltage point adjustment, switching frequency synchronization of up to 3 units using no external components and pi-network input filtering. An output voltage adjustment/load compensation pin is also standard. Fault tolerant design protects these converters from most external circuit faults. The output and output adjust pins will withstand +35V while the shutdown and all synchronization pins will withstand +50V protecting the converters from a variety of system or board faults, i.e. solder bridges, etc. Unique load fault protection circuitry allows this converter to pull up loads having difficult static load line characteristics and allows short term load excursions significantly beyond ratings in most applications. The BBF2800 series is a current mode push-pull topology converter which operates at a switching frequency of 500KHz. Internal filtering of both input and output eliminates the need for external capacitors in many applications. The 12-pin power dip package allows connection to a heatsink and is hermetically sealed and isolated from the internal circuits. 1 2 3 4 5 6 +INPUT SHUTDOWN PLUS CLOCK ADJUST/COMP -OUTPUT +OUTPUT 12 11 10 9 8 7 -INPUT TIMING 2 TIMING 1 CASE -SENSE +SENSE BLOCK DIAGRAM 1 6 12 5 PWM CURRENT MODE CONTROLLER 2 ERROR AMPLIFIER REFERENCE AND ISOLATION 7 4 8 3 10 11 1 Rev. - 3/01 BBF2803S ABSOLUTE MAXIMUM RATINGS ABSOLUTE MAXIMUM RATINGS SPECIFICATIONS INPUT VOLTAGE RANGE (Pin 12 to 1, 2, 3, 10 or 11) INPUT TRANSIENT (Pin 12 to 1) OUTPUT WITHSTAND (Pin 5 and 8 to 7, 6 or 4) OUTPUT CURRENT (Continuous) TEMPERATURE, Storage TEMPERATURE, Pin Soldering 10s SPECIFICATIONS 0 - 50 Vdc 80 V @ 50 ms 35 Vdc 5.5 Adc BBF2803S 4.0 Adc BBF2805S 1.9 Adc BBF2812S 1.5 Adc BBF2815S –65oC, 150oC 300oC BBF2803S TEST CONDITIONS1 MIN TYP MAX UNITS INPUT VOLTAGE RANGE OUTPUT VOLTAGE OUTPUT CURRENT VIN; min to max Vdc @ IMIN VIN; min to max Vdc 16 3.2 500 28 3.3 40 3.4 5500 Vdc Vdc mAdc EFFICIENCY OUTPUT RIPPLE VOLTAGE INPUT RIPPLE CURRENT Bandwidth 10 kHz to 1MHz Bandwidth 10 kHz to 1MHz 66 20 20 50 50 % mVrms mArms OUTPUT POWER2 LINE REGULATION3 LOAD REGULATION3 VIN; min to max3 IOUT; min to max3 2 1 18.0 20 15 W mVdc mVdc 125 40 2.5 %/°C °C mAdc mAdc PARAMETER STEADY STATE CHARACTERISTICS TEMPERATURE COEFFICIENT TEMPERATURE RANGE, case2 QUIESCENT CURRENT INHIBITED 1.6 .01 –55 IOUT = 0 A VPIN5 ; < 8 Vdc .09 35 1.25 ISOLATION CHARACTERISTICS (INPUT/OUTPUT/CASE) LEAKAGE RESISTANCE LEAKAGE CAPACITANCE (VTEST = 500Vdc) (f = 10kHz) 100 50 MΩ pF 300 30 mV µs 100 100 mV µs 1400 40 mV µs mV µs DYNAMIC CHARACTERISTICS LINE STEP RESPONSE VOLTAGE CHANGE RECOVERY TIME (95%) WITH 100µF OUTPUT CAP VOLTAGE CHANGE RECOVERY TIME (95%) VIN; TR, TF = 10µs VIN; 16 to 40 Vdc LOAD STEP RESPONSE VOLTAGE CHANGE RECOVERY TIME (95%) WITH 100µF OUTPUT CAP VOLTAGE CHANGE RECOVERY TIME (95%) IOUT; TR, TF = 10µs IOUT; 50% to max Adc IOUT; 50% to max Adc 300 60 START-UP OVERSHOOT SHUTDOWN DELAY SHUTDOWN RECOVERY4 VIN ; 0 to 40 Vdc VPIN5 ; > 10 Vdc to < 8 Vdc VPIN5 ; < 8 Vdc to > 10 Vdc 0 220 30 NOTES: CAUTION: CAUTION 1. 2. 3. 4. VIN; 16 to 40 Vdc 500 60 mV µs mS Unless otherwise stated: TC = 25°, VIN = 28V, IOUT = IMAX AMPS Derate power linearly to zero from 125°C to 135°C. Regulation measured between pin 8 and pin 7. Recovery spec assumes that converter has been OFF for at least 500ms. The internal substrate contains beryllia (BeO). Do not break the seal. If accidentally broken, do not crush, machine, or subject to temperatures in excess of 850°C to avoid generating toxic fumes. 2 Rev. - 3/01 BBF2805S BBF2812S BBF2815S SPECIFICATIONS BBF2805S BBF2812S BBF2815S MIN TYP MAX MIN TYP MAX MIN TYP MAX UNITS 16 5.00 400 28 5.05 40 5.1 4000 16 12.00 190 28 12.05 40 12.1 1900 16 15.0 150 28 15.1 40 15.2 1500 Vdc Vdc mAdc 73 25 20 50 30 % mVrms mArms 10 20 22 50 50 W mVdc mVdc 125 40 2.5 %/°C °C mAdc mAdc 70 20 20 50 30 20 50 25 2.3 5 2 125 40 2.5 –55 2 .01 –55 .09 35 1.25 72 25 20 50 30 23 50 50 2.2 5 5 125 40 2.5 –55 .01 100 .09 .01 35 1.25 100 .9 35 1.25 50 80 85 MΩ pF 400 30 300 40 300 40 mV µs 200 250 150 250 150 250 mV µs 1400 40 800 60 800 60 mV µs 500 150 280 400 280 400 mV µs 0 220 30 500 60 100 0 220 30 0 220 30 500 60 PACKAGE THERMAL SPECIFICATIONS MIN RESISTANCE, case to air TEMPERATURE RISE, junction to case 3 500 60 mV µs ms TYP MAX UNITS 12 10 15 °C/W °C Rev. - 3/01 BBF2803S TYPICAL PERFORMANCE GRAPHS EFFICIENCY CONTOURS 40 70% 25 20 12 10 0.0 2.0 4.0 6.0 OUTPUT CURRENT, IOUT (A) IOUT 2.75A INCLUDES 1000µF ON OUTPUT BUS 1V VOUT 5.5A 2.75A IOUT NO OUTPUT BUS CAPCITANCE LOAD = 5.5A 40V 16V VIN INCLUDES 100µF ON OUTPUT BUS TURN ON RESPONSE 0 3.3V VOUT LOAD = 5.5A 0V 28V VIN 0V INCLUDES 100µF ON OUTPUT BUS TIME, t (5msec/DIV) 4 AUDIO REJECTION, AV (dB) RESPONSE, X (UNITS/DIV) 10 V 2V TURN ON VOLTAGE, ETO (V) INCLUDES 100µF ON OUTPUT BUS VOUT TURN ON THRESHOLD 12 10K 20K 30K 40K 60K 90K SET POINT RESISTOR, RSP (Ω) 2.75A IOUT TIME, t (200µsec/DIV) 28 16 VOUT LINE TRANSIENT RESPONSE TIME, t (200µsec/DIV) 20 64% 5.5A TIME, t (100µsec/DIV) TIME, t (500µsec/DIV) 24 69% 20 LOAD TRANSIENT RESPONSE 100µF OUTPUT RESPONSE, X (UNITS/DIV) 10V 100mV 1V 2A OUTPUT RESPONSE, X (UNITS/DIV) 5.5A 68% LOAD TRANSIENT RESPONSE LOAD TRANSIENT RESPONSE 1000µF VOUT 25 16 .55 1.1 2.2 3.3 4.4 5.5 OUTPUT CURRENT, IOUT (A) 2A 14 OUTPUT RESPONSE, X (UNITS/DIV) INPUT VOLTAGE, VIN (V) 16 OUTPUT DC CURRENT RATING TEMP = 25°C 18 67% 16 .55 1.1 2.2 3.3 4.4 5.5 OUTPUT CURRENT, IOUT (A) LOW LINE DROP OUT 20 66% 70% 67% 66% 16 .55 1.1 2.2 3.3 4.4 5.5 OUTPUT CURRENT, IOUT (A) TEMP = 125°C 30 1V 69% 20 30 40% 50% 60% 35 64% 2A 25 50% TEMP = 54% –55°C 58% 60% 62% 64% 65% 66% 35 EFFICIENCY CONTOURS 40 30% 40% OUTPUT RESPONSE, X (UNITS/DIV) 68% INPUT VOLTAGE, VIN (V) INPUT VOLTAGE, VIN (V) 40% 50% TEMP = 25°C 56% 35 60% 64% 66% 30 67% INPUT VOLTAGE, VIN (V) EFFICIENCY CONTOURS 40 –20 AUDIO REJECTION VIN = 28VDC IOUT = 5.5 Amps –40 –60 –80 –100 100 200 400 1K 2K 10K 20K FREQUENCY, f (Hz) 100K Rev. - 3/01 BBF2805S TYPICAL PERFORMANCE GRAPHS EFFICIENCY CONTOURS 73% .8 1.6 2.4 3.2 OUTPUT CURRENT, IOUT (A) 35 25 68% 69% 70% 20 71% 15 4 LOW LINE DROP OUT 14 12 10 0.0 1.0 2.0 3.0 4.0 5.0 OUTPUT CURRENT, IOUT (A) 2A IOUT INCLUDES 1000µF ON OUTPUT BUS NO OUTPUT BUS CAPCITANCE 1V 67% 4 VOUT 4A 2A IOUT INCLUDES 100µF ON OUTPUT BUS 40V 16V VIN INCLUDES 100µF ON OUTPUT BUS TURN ON RESPONSE 0 5.1V VOUT LOAD 4A 0V 28V 0V VIN INCLUDES 100µF ON OUTPUT BUS TIME, t (5msec/DIV) 5 AUDIO REJECTION, AV (dB) RESPONSE, X (UNITS/DIV) 10 V 2V TURN ON VOLTAGE, ETO (V) 73% .8 1.6 2.4 3.2 OUTPUT CURRENT, IOUT (A) LOAD 4A TURN ON THRESHOLD 12 10K 20K 30K 40K50K 70K 90K SET POINT RESISTOR, RSP (Ω) 72% 20 LOAD TRANSIENT RESPONSE 100µF 28 16 71% 25 VOUT TIME, t (200µsec/DIV) 20 30 TIME, t (200µsec/DIV) TIME, t (500µsec/DIV) 24 TEMP = 125°C 60% 64% 67% 69% 70% LINE TRANSIENT RESPONSE OUTPUT RESPONSE, X (UNITS/DIV) 10V 100mV 1V 1A OUTPUT RESPONSE, X (UNITS/DIV) 4A 2A IOUT 35 TIME, t (100µsec/DIV) LOAD TRANSIENT RESPONSE 1000µF VOUT VOUT 30% 50% 16 .4 4 4A 1A INPUT VOLTAGE, VIN (V) 16 OUTPUT DC CURRENT RATING TEMP = 25°C 18 .8 1.6 2.4 3.2 OUTPUT CURRENT, IOUT (A) LOAD TRANSIENT RESPONSE OUTPUT RESPONSE, X (UNITS/DIV) 20 64% 66% 30 TEMP = –55°C OUTPUT RESPONSE, X (UNITS/DIV) 16 .4 50% 55% 60% INPUT VOLTAGE, VIN (V) INPUT VOLTAGE, VIN (V) INPUT VOLTAGE, VIN (V) 20 EFFICIENCY CONTOURS 40 40% 1V 40 30% 40% 50% 35 TEMP = 25°C 60% 63% 66% 30 68% 70% 71% 25 72% 1A EFFICIENCY CONTOURS 40 –20 AUDIO REJECTION VIN = 28VDC IOUT = 4 Amps –40 –60 –80 –100 100 200 400 1K 2K 10K 20K FREQUENCY, f (Hz) 100K Rev. - 3/01 BBF2800S SERIES APPLICATION INFORMATION OUTPUT ADJUST / COMP MULTIPLE CONVERTER SYNCHRONIZATION The output voltage of the BBF2800S may be adjusted from 90% to 110% of nominal value by the use of a 50KΩ potentiometer as shown. Adjustment beyond this range is possible however certain characteristics of the converter such as but not limited to input voltage range, efficiency, ripple and temperature performance will change. Characterization by the user is recommended in such applications. Synchronized operation of up to three BBF2800S series converters may be accomplished without external components. One unit selected to be the master is connected normally with pin 10 grounded. The clock output pin 3 will provide the sync signal for up to two slave units. The slave units have pin 10 not connected and receive the clock signal into pin 11. The clock signal lines may be shielded to prevent radiation. A separate 50 ohm coax to each slave unit is recommended in order to preserve signal integrity. Shield ends should be connected to pin 12 of the nearest converter. BBF2800S converters may also be synchronized to an external 500 KHz (+/- 5%) frequency source driving pin 11 of the converters. Pin 10 is not connected. The converters synchronize to the positive edge of the frequency source allowing a variety of wave forms (pulse, square, spike) to be used. Pin 11 is internally capacitively coupled allowing unipolar or bipolar frequency sources to be used. The source should have a waveform rise time of 20 ns or less and be capable of driving at least 4 volts peak into each 50 ohm pin 11 input (50 volts peak max). An externally synchronized unit may be used to synchronize other (slave) units. The slave units may be used in turn to synchronize other slave units from their pin 3 outputs. Each “generation” of slave units has a delay (100-200ns typical) from the unit that it is synchronizing to. 4 7 8 50KΩ Adjust/comp (pin 4) may be driven by external circuitry referenced to pin 8 (-output sense) if desired. Grounding pin 4 causes output voltage to increase (25% typically) while driving pin 4 above 1.3 V causes output voltage to decrease. Pin 4 may be driven through 10KΩ or more if connection of the comp function is also required. The comp function of pin 4 allows transient response and phase margin to be tailored to suit a specific application. This feature may be utilized by connecting a small (1-500 nf) capacitor between pins 4 and 6 or 7. This is generally recommended when very large low ESR load capacitances are used. TYPICAL APPLICATION SHUTDOWN PLUS Pin 2 is used for remote shutdown, output fault detection, and/or setting the input voltage point at which the converter will turn on as shown in the typical application diagram. No connection to pin 2 is necessary for normal operation of the converter. Pin 2 is referenced to pin 12 (-input). Shutdown may be implemented by simply connecting pin 2 to an open collector logic output or switch rated at 2.5 mA, 25 Vdc or higher. Input voltage turn on point is programmed with a single resistor from pin 2 to 12. An input turn on/off hysteresis (typically 3.5% of Vin) will be observed. This should be considered when making or verifying set point adjustment. The value of the setpoint resistor may be determined by the following: 3 R = 210 • 10 ETO – 9.5 The above diagram shows the remote sense feature which reduces Vo errors due to the resistance of the conductors feeding the load. This diagram also shows the connections for non-synchronized operation (TIMING 1 and 2) as well as output voltage trim, remote shutdown, fault monitoring, and input voltage turn on point adjustment. (±10% accuracy at 25°C) Set point temperature coefficient is typically +400ppm/°C. Output fault monitoring is accomplished by observing pin 2 with a high impedance monitoring circuit. Pin 2 voltage drops from over 10 V to below 1 V when a load fault causes the converters fault protection circuitry to activate. It will remain low for at least 100 mS and return high. If the load fault is still present pin 2 will return low and the cycle will repeat. If there is no input setpoint programming resistor already in place a resistor > 400 KΩ from pin 2 to 12 will provide pin 2 pull down. 6 Rev. - 3/01 MECHANICAL SPECIFICATIONS NOTE: ALL DIMENSIONS ARE ±0.010 INCHES UNLESS OTHERWISE LABELED. ESD Triangle indicates Pin 1. BBF2812S ORDERING INFORMATION SCREENING BLANK= INDUSTRIAL; E= EXTENDED RELIABILITY; H= CLASS H; K= CLASS K SINGLE OUTPUT OUTPUT VOLTAGE 03=3.3V; 05=5V; 12=12V; 15=15V NOMINAL INPUT VOLTAGE GENERAL PART NUMBER The above example is an industrial grade 12V single output converter M.S. Kennedy Corp. 4707 Dey Road, Liverpool, New York 13088 Phone (315) 701-6751 FAX (315) 701-6752 www.mskennedy.com The information contained herein is believed to be accurate at the time of printing. MSK reserves the right to make changes to its products or specifications without notice, however, and assumes no liability for the use of its products. Please visit our website for the most recent revision of this datasheet. 7 Rev. - 3/01