25W DC/DC CONVERTER beta dyne Industry's Fastest Settling DC/DC Converter Patent No.: US 6,262,901 B1 Key Features * * * * * * * * * * * 25S transient response Efficiency up to 86% Six-sided shielding Soft start Single/Dual/Triple Short circuit protection Adjustable output 75A off-state current Wide input voltage range (2:1) Synchronization Industry pinout beta dyne 1 2 3 9 DC/DC CONVERTER 8 25T5-15/48 7 4 Patent No.: US 6,262,901 B1 6 MADE IN USA Applications Functional Description The 25W series is a family of high-performance and high power Telecom density isolated DC/DC converters. The series consists of 46 Computers single, dual and triple modules. State-of-the-art design and packaging techniques make possible the 20W/in3 power den- Instrumentation sity without sacrificing functionality or performance. The 25S transient response time makes these modules ideal for fast- Test & Measurement switching load applications and the 75A off-state current dras- Battery Power Systems +V IN 4 -V IN 3 SYNC 2 ON/OFF 1 tically reduces the current drain in battery-operated systems. FILTER SYNCHRONOUS RECTIFIERS & FILTER PWM & SWITCHING TRANSISTOR OPTO ISOLATOR ERROR AM 7 +V OUT 8 -V OUT 9 V ADJ REF Typical Block Diagram of a Single Output Beta Dyne, Inc. * 110 Elm St, Unit 12 * Bridgewater, MA 02324 * Phone 508-697-1993 * Fax 508-697-2045 * www.beta-dyne.com 25W DC/DC CONVERTER DCDC25_DS_REV02.PDF SHEET 1 OF 5 Electrical Specifications INPUT SPECIFICATIONS PARAMETER Input Voltage Range Input Filter Reverse Polarity Input Current Input Surge Current (20S Spike) Short Circuit Current Limit Undervoltage Shutdown Off State Current Remote ON/OFF Control Supply ON Supply OFF Logic Input Reference Logic Compatibility Converter Standby Current OUTPUT SPECIFICATIONS PARAMETER Voltage and Current Ratings Output Voltage Accuracy Single/Dual Output Models Tripel Output Models; Main Auxiliary Output Voltage Adjustment Voltage Balance Dual Outputs Triple Outputs (Auxiliaries) Minimum Load Ripple & Noise Line Regulation Single/Dual Output Models Triple Output Models; Main Auxiliary Load Regulation Single Output Models Dual Output Models Triple Output Models; Main Auxiliary Temperature Coefficient @ FL Transient Response Time Short Circuit Protection Output Short Circuit Duration Unless otherwise specified, all parameters are given under typical +25C with nominal input voltage and under full output load conditions. CONDITIONS / NOTES MIN TYP MAX UNITS 12 10 A A % IIN Vdc A See Model Selection Guide LC 150 8 75 Open (Open circuit voltage: 12V max.) 0 0.8 V Vdc -Input TTL Open Collector or CMOS Open Drain 32 CONDITIONS / NOTES MIN TYP mA MAX UNITS Fully loaded Single and dual models only 1 1 3 3 5 5 % % % % Balanced loads Balanced loads for auxiliary 1 1 2 2 % % % of FL (See App. Note DC-003) 1 2 %VPP of VOUT Minimum VIN to maximum VIN Minimum VIN to maximum VIN Minimum VIN to maximum VIN 1 1 5 2 2 5 % % % See Model Selection Guide 10 No Load to Full Load Main Fully Loaded Main Fully Loaded See Graph 1 1 1 5 0.02 25 50% FL to FL to 50% FL All outputs, by input current limiting Continuous 6 % % % % %/C S GENERAL SPECIFICATIONS PARAMETER Efficiency Isolation Voltage (1 min.) Isolation Resistance Isolation Capacitance Switching Frequency CONDITIONS / NOTES MIN TYP See Model Selection Guide 1500 109 80 160 MAX UNITS % Vdc pF kHz Beta Dyne, Inc. * 110 Elm St, Unit 12 * Bridgewater, MA 02324 * Phone 508-697-1993 * Fax 508-697-2045 * www.beta-dyne.com 25W DC/DC CONVERTER DCDC25_DS_REV02.PDF SHEET 2 OF 5 ENVIRONMENTAL SPECIFICATIONS PARAMETER Operating Temperature Range (Ambient) Storage Temperature Range Thermal Resistance Thermal Turn Off, Case Temperature Thermal Hysterisis Derating Cooling EMI/RFI MTBF Humidity CONDITIONS / NOTES Industrial Extended MIN TYP MAX UNITS +71 +85 +125 5 95 10 C C C C/W C C 718,000 hours -40 -55 -55 5 None Free-air convection Six-sided continuous shielded metal case per MIL-HNBK-217F (Ground benign, +25C) Up to 95% non-condensing PHYSICAL CHARACTERISTICS PARAMETER CONDITIONS / NOTES Case Size Case Material Weight Shielding Connection 12VIN, 24VIN models 48VIN models MIN TYP MAX UNITS 2x2x0.395in (50.8x50.8x10.03mm) Blue coated metal 1.04oz. (30g) -Input (Pin 3) +Input (Pin 4) EXTERNAL SYNCHRONIZATION All models in the 25W series can be synchronized to an external clock by driving the SYNC pin (pin 2) directly or with an open collector-open drain (1 TTL load). The driving signal frequency must be 380kHz 5% (20% low, 80% high duty cycle). The PWM used in the 25W series offers bidirectional SYNC ports, which allow multiple unit synchronization by connecting all SYNC pins together. In the absence of an external clock, the faster unit takes control of the SYNC bus and the rest of the units follow. EXTERNAL TRIMMING OF OUTPUT VOLTAGES To trim the output voltage DOWN, connect a 5% 1/4W resistor between the + (plus) output and trim pins of the converter. To trim the output voltage UP, connect a 5% 1/4W resistor between the - (minus) output and trim pin of the converter. For UP/DOWN trimming capability, connect a 10kW potentiometer between the + and - pins, with the wiper arm connected to the trim pin. The trim resistors/potentiometer can be connected at the converter output pins or the load. However, if connected at the load, the resistance of the runs becomes part of the feedback network, improving load regulation. If the load is some distance from the converter, the use of #20 gauge wire is recommended to avoid excessive voltage drop due to the resistance of the circuit paths. See our application notes: DC-001: Testing Transient Response in DC/DC Converters DC-004: Thermal Consideration for DC/DC Converters Beta Dyne, Inc. * 110 Elm St, Unit 12 * Bridgewater, MA 02324 * Phone 508-697-1993 * Fax 508-697-2045 * www.beta-dyne.com 25W DC/DC CONVERTER DCDC25_DS_REV02.PDF SHEET 3 OF 5 Model Selection Guide MODEL NUMBER INPUT Voltage (Vdc) Nominal Range OUTPUT Current (mA) Reflected No-load Full-load Ripple (mAPP) Voltage (Vdc) Current (mA) Efficiency Full load (%) 25S2.5/12 25S3.3/12 25S5/12 25S12/12 25S15/12 12 12 12 12 12 9-18 9-18 9-18 9-18 9-18 30 30 30 30 30 2210 2390 2160 2160 2170 100 100 100 100 100 2.5 3.3 5 12 15 8000 6600 4400 1830 1460 75 76 85 85 84 25S2.5/24 25S3.3/24 25S5/24 25S12/24 25S15/24 24 24 24 24 24 18-36 18-36 18-36 18-36 18-36 40 40 40 40 40 1030 1240 1210 1210 1200 40 40 40 40 40 2.5 3.3 5 12 15 8000 7500 5000 2080 1660 81 83 86 86 86 25S2.5/48 25S3.3/48 25S5/48 25S12/48 25S15/48 48 48 48 48 48 36-72 36-72 36-72 36-72 36-72 30 30 30 30 30 535 620 620 600 600 40 40 40 40 40 2.5 3.3 5 12 15 8000 7500 5000 2080 1660 78 85 84 87 86 25D5/12 25D12/12 25D15/12 12 12 12 9-18 9-18 9-18 30 30 30 2350 2260 2250 80 80 80 +5/-5 +12/-12 +15/-15 2200 910 730 78 81 81 25D5/24 25D12/24 25D15/24 24 24 24 18-36 18-36 18-36 40 40 40 1270 1220 1210 40 40 40 +5/-5 +12/-12 +15/-15 2500 1040 830 82 85 86 25D5/48 25D12/48 25D15/48 48 48 48 36-72 36-72 36-72 30 30 30 630 620 610 40 40 40 +5/-5 +12/-12 +15/-15 2500 1040 830 83 84 85 25T3.3-5/12 25T3.3-12/12 25T3.3-15/12 25T5-12/12 25T5-15/12 12 12 12 12 12 9-18 9-18 9-18 9-18 9-18 40 40 40 40 40 2410 2600 2610 2680 2700 120 120 120 120 120 3.3/5 3.3/12 3.3/15 5/12 5/15 3500/1000 3500/500 3500/410 2500/500 2500/410 75 75 76 76 77 25T3.3-5/24 25T3.3-12/24 25T3.3-15/24 25T5-12/24 25T5-15/24 24 24 24 24 24 18-36 18-36 18-36 18-36 18-36 35 40 45 45 45 1320 1320 1320 1250 1260 50 50 50 50 50 3.3/5 3.3/12 3.3/15 5/12 5/15 3500/1200 3500/500 3500/410 2500/500 2500/410 74 74 75 82 82 25T3.3-5/48 25T3.3-12/48 25T3.3-15/48 25T5-12/48 25T5-15/48 48 48 48 48 48 36-72 36-72 36-72 36-72 36-72 40 40 40 40 40 680 660 650 620 620 40 40 40 40 40 3.3/5 3.3/12 3.3/15 5/12 5/15 4000/1200 4000/500 4000/410 2500/500 2500/410 77 80 82 82 83 Please contact Beta Dyne for different input voltage range and output voltage combinations Beta Dyne, Inc. * 110 Elm St, Unit 12 * Bridgewater, MA 02324 * Phone 508-697-1993 * Fax 508-697-2045 * www.beta-dyne.com 25W DC/DC CONVERTER DCDC25_DS_REV02.PDF SHEET 4 OF 5 25W SINGLE 80 ON/OFF 20 1 3 SYNC 4 9 V ADJ ON/OFF SYNC -V IN +V IN 2 8 GND 10K 7 V OUT +V OUT ** 10F 100V V IN 100F GND (TOP VIEW) 1000F ** 500V ** 1000F 500V Typical connection diagram of 25W Single DC/DC Converter ** OPTIONAL PARTS DIMENSIONS in inches [mm] CASE HEADER 0.395 [10.03] MAX O0.040 [1.02] (8PL) 0.10 [2.54] MIN 6 7 4 BOTTOM VIEW 3 1.60 [40.64] 1.20 [30.48] 8 1.10 [27.94] 2 0.90 [22.86] 1 0.70 [17.78] 0.80 [20.32] 9 0.50 [12.70] 0.40 [10.16] 0.10 [2.54] 1.80 [45.72] 2.00 SQUARE [50.80] PIN ASSIGNMENT SINGLE DUAL TRIPLE Pin Function Function Function 1 ON/OFF ON/OFF ON/OFF 2 SYNC SYNC SYNC 3 -VIN -VIN -VIN 4 +VIN +VIN +VIN 5 No pin No pin No pin 6 No pin +VOUT +VAUX 7 +VOUT GND +VOUT 8 -VOUT -VOUT GND 9 VOUT ADJ VOUT ADJ -VAUX Beta Dyne, Inc. * 110 Elm St, Unit 12 * Bridgewater, MA 02324 * Phone 508-697-1993 * Fax 508-697-2045 * www.beta-dyne.com 25W DC/DC CONVERTER DCDC25_DS_REV02.PDF SHEET 5 OF 5