DHC2800S SERIES 5W/5.4W DC-DC CONVERTERS DHC2812S • DHC2815S M I C R O T E C H N O L O G Y HTTP://WWW.APEXMICROTECH.COM (800) 546-APEX (800) 546-2739 HI-REL DESIGN • WAVE SOLDERABLE PACKAGE • ALL CERAMIC CAPACITORS • SURFACE MOUNT MAGNETICS FEATURES • NO DERATING — –55°C TO +125°C • HIGH ISOLATION — 500V • OUTPUT VOLTAGE ADJUSTMENT STANDARD • REMOTE SHUTDOWN • 11 – 50V INPUT @ 5 WATTS OUTPUT Package Dimensions 1" W x 1" L x .35" H TYPICAL APPLICATION DESCRIPTION The DHC2812S and DHC2815S 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 while retaining a power density of 15 W/in3 and 375 mW/gram of power/package performance. The use of advanced substrate and reflow soldering techniques during construction results in a rugged, cost-effective and completely solderable package. The DHC2800S hybrid converter series utilizes all ceramic capacitors, surface mount magnetics, and ultrasonically bonded wires to provide reliable operation at all operating temperatures while surviving G forces of up to 500 G. The DHC2800S series standard features include output fault monitoring and/or turn on voltage point programming via the shutdown pin. All three functions may be implemented simultaneously with a minimum of external components. An output voltage adjustment / load compensation pin which adjusts outputs simultaneously is also standard. However, the DHC2800S may be ordered without this feature (/F option). Fault tolerant design protects these converters from most external circuit faults. The +output and output adjust pins will withstand +25 V while the shutdown pin will withstand +50 V, protecting the converters from a variety of system or board faults; e.g. 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. A transformer isolated flyback converter topology operating at a switching frequency of 400 kHz allows operation over a wide input voltage range. Internal filtering of outputs eliminates the need for external capacitors in many applications. The 8-pin DIP package (see Package Outlines) is hermetically sealed and isolated from the internal circuits. Heat sinking is recommended for full power operation at elevated ambient temperatures. 10nF 8 4 2 DHC2800S 3 5 SET UV LOCKOUT +V 1 7 150K VTRIM 6 COMMON –V Control System RSP 200K +5V VIN 5K SHUTDOWN OPTO J174 OPERATION NORMAL (TTL) BLOCK DIAGRAM 6 1 2 5 PWM FEED FORWARD CONTROLLER 7 ERROR AMPLIFIER REFERENCE AND ISOLATION 4 EXTERNAL CONNECTIONS + OUTPUT 1 OUTPUT COMMON 2 NO CONNECTION 3 ADJUST/COMP* 4 SHUTDOWN PLUS 5 TOP VIEW 8 CASE 7 – INPUT 6 + INPUT * Optional N/C on DHC2800S/F APEX MICROTECHNOLOGY CORPORATION • TELEPHONE (520) 690-8600 • FAX (520) 888-3329 • ORDERS (520) 690-8601 • EMAIL [email protected] Powered by ICminer.com Electronic-Library Service CopyRight 2003 ABSOLUTE MAXIMUM RATINGS SPECIFICATIONS DHC2812S • DHC2815S SPECIFICATIONS PARAMETER DHC2812S 0 – 50Vdc 80V @ 50ms 450mA –65°C, 150°C 300°C INPUT VOLTAGE RANGE (Pin 7 to 6 or 5) INPUT TRANSIENT (Pin 7 to 6) OUTPUT CURRENT (Continuous) TEMPERATURE, Storage TEMPERATURE, Pin Soldering 10s ABSOLUTE MAXIMUM RATINGS DHC2812S DHC2815S 50Vdc 80V @ 50ms 360mA –65°C, 150°C 300°C DHC2815S TEST CONDITIONS1 MIN TYP MAX MIN TYP MAX UNITS –55°C ↔ 125°C Io = 10% VIN = 16 ↔ 40 VIN = 11 ↔ 50 VIN = 16 ↔ 40 VIN = 11 ↔ 50 Io= 100% VIN = 11 ↔ 502 Po = 0-5.4W2 11 11.9 28 12 50 12.1 450 417 5.4 5 11 14.9 28 15 50 15.1 360 333 5.4 5 62 67 5 5 63 68 5 5 Vdc Vdc mAdc mAdc W W % mV mV °C STEADY STATE CHARACTERISTICS INPUT VOLTAGE RANGE OUTPUT VOLTAGE OUTPUT CURRENT –55°C ↔ 125°C OUTPUT POWER –55°C ↔ 125°C EFFICIENCY LINE REGULATION LOAD REGULATION OPERATING TEMPERATURE, CASE TEMPERATURE COEFFICIENT (Vout) INPUT RIPPLE CURRENT WITH 1µH SERIES INDUCTANCE OUTPUT RIPPLE VOLTAGE LOAD CAPACITANCE (OUTPUT OVER –55°C ↔ 125°C) SHORT CIRCUIT DISSIPATION QUIESCENT INPUT CURRENT INHIBITED –55 0.006 340 45 15 Bandwidth = 10kHz → 1MHz Bandwidth = 10kHz → 1MHz Bandwidth = 10kHz → 1MHz VIN = 16 ↔ 40 VIN = 11 ↔ 50 0.09 25 25 125 –55 0.5 50 1.25 70 2.5 %/°C mArms mArms mVrms µF µF W mA mA 400 400 500 MΩ pF 200 200 200 200 mV µS 100 400 100 500 mV µS 500 150 500 150 mV µS 100 500 0 250 40 100 600 0 250 40 mV µS mV µS mS 0.5 50 1.25 0.006 340 45 15 25 25 125 400 55 60 200 100 70 2.5 0.09 400 55 60 200 100 ISOLATION CHARACTERISTICS (INPUT/OUTPUT/CASE) LEAKAGE RESISTANCE LEAKAGE CAPACITANCE DYNAMIC CHARACTERISTICS LINE STEP RESPONSE, 10µs rise VOLTAGE CHANGE RECOVERY TIME (99%) WITH 200 µF OUTPUT CAPACITORS3 VOLTAGE CHANGE RECOVERY TIME (99%) LOAD STEP RESPONSE, 10µs rise VOLTAGE CHANGE RECOVERY TIME (99%) WITH 200 µF OUTPUT CAPACITORS3 VOLTAGE CHANGE RECOVERY TIME (99%) START-UP OVERSHOOT SHUTDOWN DELAY SHUTDOWN RECOVERY NOTES: 500 Vdc 10kHz 100 100 VIN = 16 ↔ 40Vdc, Io = 100% Io= 50–100–50% VIN = 0 → 28 Vdc Pin 5 = >10↔ <8 Vdc Pin 5 = > 8↔ <10Vdc 1. Unless otherwise stated TC = 25°, VIN = 28V, Po = 5 watts, PACKAGE & THERMAL SPECIFICATIONS WEIGHT TEMPERATURE RISE, junction to case TEMPERATURE RISE, case to ambient 500 60 500 60 2. Regulation measured on output pins 1/16" from case. MIN TYP MAX UNITS 14 17 30 25 GRAMS °C °C/W APEX MICROTECHNOLOGY CORPORATION • 5980 NORTH SHANNON ROAD • TUCSON, ARIZONA 85741 • USA • APPLICATIONS HOTLINE: 1 (800) 546-2739 Powered by ICminer.com Electronic-Library Service CopyRight 2003 TYPICAL PERFORMANCE GRAPHS DHC2812S EFFICIENCY CONTOURS EFFICIENCY CONTOURS EFFICIENCY CONTOURS 50 TEMP = 25°C 50% 40 55% 60% 64% 30 67% 20 69% TEMP = –55°C 40% 40 50% 55% 30 60% 63% 65% 66% 67% 20 50 INPUT VOLTAGE, VIN (V) 30% 40% INPUT VOLTAGE, VIN (V) INPUT VOLTAGE, VIN (V) 50 TEMP = 125°C 40% 50% 40 56% 61% 64% 30 66% 20 68% 13 12 11 10 0 1 2 3 4 5 6 OUTPUT CURRENT, POUT (W) 450mA LOAD 16 OUTPUT RESPONSE, X (UNITS/DIV) 20V 200mV TURN ON VOLTAGE, ETO (V) 20 12 10K 20K 30K 40K 60K 90K SET POINT RESISTOR, RSP (Ω) AUDIO REJECTION, A V (dB) 200mV 450mA LOAD 225mA INCLUDES 200µF ON OUTPUT BUS TIME, t (500µsec/DIV) LINE TRANSIENT RESPONSE 24 –20 225mA NO OUTPUT BUS CAPCITANCE VOUT TIME, t (100µsec/DIV) TURN ON THRESHOLD 28 0 VOUT VOUT VIN TURN ON RESPONSE OUTPUT LOAD = 450mA IOUT = 450mA 40V 16V INCLUDES 4.7µf ON OUTPUT BUS TIME, t (100µsec/DIV) RESPONSE, X (UNITS/DIV) 20V 5V 14 100mA INPUT VOLTAGE, VIN (V) OUTPUT DC POWER RATING 15 2 3 4 5 OUTPUT CURRENT, POUT (W) LOAD TRANSIENT RESPONSE 200µF 100mA LOAD TRANSIENT RESPONSE 10 1 OUTPUT RESPONSE, X (UNITS/DIV) LOW LINE DROP OUT 16 500mV 2 3 4 5 OUTPUT POWER, POUT (W) 68% 11 .18 .36 .72 1.08 1.44 1.8 OUTPUT CURRENT, IOUT (A) OUTPUT RESPONSE, X (UNITS/DIV) 10 1 12V VOUT VIN 0V 28V INCLUDES 200µF ON OUTPUT TIME, t (10msec/DIV) AUDIO REJECTION VIN = 28V IOUT = 450mA –40 –60 –80 –100 1K 10K FREQUENCY, f (Hz) 100K APEX MICROTECHNOLOGY CORPORATION • TELEPHONE (520) 690-8600 • FAX (520) 888-3329 • ORDERS (520) 690-8601 • EMAIL [email protected] Powered by ICminer.com Electronic-Library Service CopyRight 2003 TYPICAL PERFORMANCE GRAPHS DHC2815S EFFICIENCY CONTOURS 68% 20 70% 50% 40 58% LOW LINE DROP OUT 1 2 3 4 5 6 OUTPUT CURRENT, POUT (W) 500mV LOAD 180mA NO OUTPUT BUS CAPCITANCE TURN ON THRESHOLD RESPONSE, X (UNITS/DIV) 20V 5V TURN ON VOLTAGE, ETO (V) OUTPUT LOAD = 360mA 20 16 12 10K 20K 30K 40K 60K 90K SET POINT RESISTOR, RSP (Ω) AUDIO REJECTION, A V (dB) –20 67% 20 68% 2 3 4 5 OUTPUT CURRENT, POUT (W) VOUT 15V VOUT VIN 0V 28V INCLUDES 200µF ON OUTPUT TIME, t (10msec/DIV) 360mA LOAD 180mA INCLUDES 200µF ON OUTPUT BUS TIME, t (500µsec/DIV) TURN ON RESPONSE 24 65% TIME, t (100µsec/DIV) 28 0 30 LINE TRANSIENT RESPONSE VOUT VOUT = 360mA 200mV 0 61% LOAD TRANSIENT RESPONSE 200µF OUTPUT RESPONSE, X (UNITS/DIV) 10 VOUT 360mA 100mA 11 OUTPUT RESPONSE, X (UNITS/DIV) INPUT VOLTAGE, VIN (V) 12 56% 10 1 2 3 4 5 OUTPUT CURRENT, POUT (W) LOAD TRANSIENT RESPONSE OUTPUT DC POWER RATING 13 69% 20 10 1 16 14 66% 40 72% 2 3 4 5 OUTPUT CURRENT, POUT (W) 15 62% 30 TEMP = 125°C 50% 200mV 64% 30 40% TEMP = –55°C 100mA 56% 40% INPUT VOLTAGE, VIN (V) TEMP = 25°C 50% 40V 20V 40% 60% 10 1 EFFICIENCY CONTOURS 50 OUTPUT RESPONSE, X (UNITS/DIV) 40 EFFICIENCY CONTOURS 50 INPUT VOLTAGE, VIN (V) INPUT VOLTAGE, VIN (V) 50 16V VIN INCLUDES 4.7µF ON OUTPUT BUS TIME, t (100µsec/DIV) AUDIO REJECTION VIN = 28V IOUT = 360mA –40 –60 –80 –100 1K 10K FREQUENCY, f (Hz) 100K APEX MICROTECHNOLOGY CORPORATION • 5980 NORTH SHANNON ROAD • TUCSON, ARIZONA 85741 • USA • APPLICATIONS HOTLINE: 1 (800) 546-2739 Powered by ICminer.com Electronic-Library Service CopyRight 2003 TYPICAL PERFORMANCE GRAPHS DHC2812S • DHC2815S OUTPUT ADJUST / COMP The output voltage of the DHC2812S and DHC2815S may be adjusted from 90% to 110% of nominal value by the use of a 150k( 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. 4 1 2 150K 10nF Adjust/comp (pin 4) may be driven by external circuitry referenced to pin 2 (-output) if desired. Grounding pin 4 causes voltage to increase (25% typically) while driving pin 4 above 1.3 V causes output voltage to decrease. Pin 4 may be driven negative without damage, however the resultant increase in converter output voltage should be considered. Pin 4 may be driven through 10K( or more if connection of the comp function is also required. The comp function of pin 4 allows load transient response to be tailored to suit specific application requirements. This feature may be utilized by connecting a 10 or less nF capacitor between pins 4 and 1. Note: The DHC2812S and DHC2815S use pin 4 while the DHC2803S and DHC2805S use pin 3. 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 5 will return low and the cycle will repeat. A resistor > 400 k( from pin 5 to 7 provides pull down for pin 5 if there is no input setpoint programming resistor already in place. LOAD FAULT RESPONSE The Apex families of DC-DC converters share load fault philosophies. Load fault conditions include short-circuit and severe overload conditions. The DHC2800 converter series responds to load faults by turning off all power conversion circuits for 250 mS and then attempting to restart for 10 mS (typical). The net "on" duty factor during a fault is very low resulting in low converter dissipation and immunity from overheating at 125°C. Current beyond rated can flow into the load at startup time. This allows the converter to bring up capacitive and other difficult load types more reliably than competing converters. Vo O Io O SHUTDOWN PLUS Pin 5 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 5 is necessary for normal operation of the converter. Pin 5 is referenced to pin 7 (-input). Shutdown may be implemented by simply connecting pin 5 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 5 to 7. 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: 210 * 10 3 R = ETO – 9.5 NORMAL LOAD FAULT NORMAL TIME O (+/– 10% accuracy at 25 C) O Set point temperature coefficient is typically + 400ppm/ C Output fault monitoring is accomplished by observing pin 5 with a high impedance monitoring circuit. Pin 5 voltage drops This data sheet has been carefully checked and is believed to be reliable, however, no responsibility is assumed for possible inaccuracies or omissions. All specifications are subject to change without notice. DHC2812S/DHC2815SU REV. B JUNE © 1999 Apex Microtechnology Corp. Powered by ICminer.com Electronic-Library Service CopyRight 2003