25 to 45 Watt UW Single Series DC/DC Converters Features ! Ultra Wide Input Voltage Range ! Low Noise, Highly Regulated Single Outputs ! No Derating to 80°C Case Temperature ! Six-Sided Shielded Low Thermal Gradient Copper Case ! Overvoltage Protected Output ! Pulse by Pulse Digital Current Limiting Thermal Overload Protection ! Direct Paralleling of Outputs ! 5 Year Warranty Description Selection Chart These converters are state-of-the-art 100kHz Bipolar based designs that provide outstanding efficiency of up to 91% at full load. The output is regulated with a high loop gain feed forward control method that provides linear regulator type performance with a true, high efficiency switching DC/DC topology. The large amount of loop gain insures excellent input ripple rejection and line transient response. Input Range VDC MIN MAX Model Output VDC Output mA 12S5.5000UW 7.0 40.0 5.0 5000 24S12.2500UW 14.0 40.0 12.0 2500 24S12.3500UW 14.0 40.0 12.0 3500 24S15.3000UW 17.0 40.0 15.0 3000 Outstanding line and load regulation are achieved over the full input voltage range and over the specified load current range by the use of external voltage sensing circuitry. Also included are a logic shutdown pin to control converter operation and an output voltage trim pin. The converters are protected from output shorts to common by a high speed, pulse by pulse digital, current limit circuit and a resettable thermal shutdown circuit. The output and the power switch are overvoltage protected. 25 to 45 Watt UW Single Series Block Diagram A + INPUT 1 PI INPUT FILTER C1 D1 - INPUT 2 6 + OUTPUT C2 7 CMN THERMAL SHUTDOWN VOLTAGE FEED FORWARD PWM ON/OFF 8 Output C1 C2 D1 5 1000µF 1000µF 6.8V 12 330µF 47µF 15V 15 330µF 47µF 18V 3 + SENSE 4 TRIM 5 - SENSE SHIELDED COPPER CASE 2401 Stanwell Drive • Concord, California 94520 • Ph: 925/687-4411 or 800/542-3355 • Fax: 925/687-3333 • www.calex.com • Email: [email protected] 1 3/2001 25 to 45 Watt UW Single Series DC/DC Converters Input Parameters* Model Voltage Range Reflected Ripple, 0-20MHz bw Input Current Full Load No Load Efficiency Switching Frequency Maximum Input Overvoltage, 100ms No Damage Undervoltage Lockout Turn-on Time, 1% Output Error MIN MAX TYP MAX TYP TYP TYP 12S5.5000UW 24S12.2500UW 24S12.3500UW 24S15.3000UW 7.0 40.0 35 100 2600 12 81 14.0 40.0 20 70 1380 12 90 14.0 40 20 70 1940 12 90 17.0 40.0 20 70 2050 12 91 Units VDC mA P-P mA % TYP 100 kHz MAX 45 VDC TYP TYP 6 35 13 25 Recommended Fuse 13 25 16 25 VDC ms (2) Output Parameters* Model Output Voltage Rated Current (3) Voltage Range 100% Load Load Regulation 0-100% Load Line Regulation Vin = Min-Max VDC Short Term Stability (4) Long Term Stability Transient Response (5) Dynamic Response (6) Input Ripple Rejection (7) Noise, 0-20MHz bw Temperature Coefficient Overvoltage Clamp (8) Maximum Allowable Voltage Between Pins 6 and & 7 (9) Short Circuit Protection to Common for all Outputs MIN MAX MIN TYP MAX TYP MAX TYP MAX TYP TYP TYP TYP TYP TYP MAX TYP MAX TYP VDC 12S5.5000UW 24S12.2500UW 24S12.3500UW 24S15.3000UW Units 5 0 5000 4.950 5.000 5.050 12 0 2500 11.900 12.000 12.100 12 0 3500 11.900 12.000 12.100 15 0 3000 14.900 15.000 15.100 VDC 0.02 0.2 0.02 0.2 0.02 55 100 60 VDC % % % 0.2 300 150 56 mA 120 135 60 50 130 60 20 60 50 150 %/kHrs µs mV peak dB mV P-P ppm/°C 6.8 15 15 20 VDC 6.3 14.0 14.0 18.0 VDC A Continuous, 8 Hours Minimum Current Limit and Thermal Overload NOTES parameters measured at Tc = 25°C, nominal input voltage * All and full rated load unless otherwise noted. Refer to the CALEX Application Notes for the definition of terms, measurement circuits and other information. (2) Determine the correct fuse size by calculating the maximum DC current drain at low line input, maximum load then adding 20 to 25 percent. (3) No minimum load required. (4) Short term stability is specified after a 30 minute warm-up at full load and with constant line, load and ambient conditions. (5) The transient response is specified as the time required to settle from 25 to 75% step load change (rise time of step = 2µSec.) to a 1% error band. (6) Dynamic response is the peak overshoot voltage during the transient response time defined in note 5 above. (7) The input ripple rejection is specified for DC to 120Hz ripple with a modulation amplitude of 1% Vin. (8) (9) (10) (11) (12) (13) For module protection only, see also note 2. The user must not let the output at the pins exceed this voltage due to the combined effects of line drops and output trim. The logic shutdown pin is Open Collector TTL, CMOS, and relay compatible. The input to this pin is referenced to input minus and is protected to +100 VDC. The functional temperature range is intended to give an additional data point for use in evaluating this power supply. At the low functional temperature the power supply will function with no side effects, however, sustained operation at the high functional temperature will reduce expected operational life. The data sheet specifications are not guaranteed over the functional temperature range. The case thermal impedance is specified as the case temperature rise over ambient per package watt dissipated. Specifications subject to change without notice. 2401 Stanwell Drive • Concord, California 94520 • Ph: 925/687-4411 or 800/542-3355 • Fax: 925/687-3333 • www.calex.com • Email: [email protected] 2 3/2001 25 to 45 Watt UW Single Series DC/DC Converters General Specifications* All Models Logic Shutdown (10) ON Logic Level or Leave Pin Open OFF Logic Level Input Resistance Converter Idle Current, Shut Down Pin Low Output Trim Function Input Resistance Programming Range (10) Programming Voltage (MIN/ADJ Range) Programming Linearity 0-5 VDC Environmental Case Operating Range No Derating Units MIN 2.4 VDC MAX TYP 1.5 2 VDC kohms TYP 12 mA TYP MIN TYP MIN TYP MAX 10 15 17 0.0 (+15%) 2.5 (0.0%) 5.0 (-15%) kohms TYP Case Funtional Range (11) Storage Range Thermal Impedance (12) Thermal Shutdown Case Temperature General % VDC Better than 1% MIN MAX MIN MAX MIN MAX TYP -25 80 -40 90 -55 100 4.4 °C/Watt TYP 90 °C Unit Weight SIDE VIEW Mechanical tolerances unless otherwise noted: °C X.XX dimensions: ±0.020 inches X.XXX dimensions: ±0.005 inches °C 7.0 Chassis Mounting Kit BOTTOM VIEW °C Seal around terminals is not hermetic. Do not immerse units in any liquid. Pin Function 1 +INPUT 2 -INPUT 3 +SENSE 4 TRIM 5 -SENSE 6 +OUTPUT 7 CMN 8 ON/OFF oz. MS9 Connections for Output Trim 5 5 TRIM UP 6 + OUTPUT 4 4 10K ± V1 + SENSE 3 4 3 DC/DC TRIMPOT 5 ± V1 - SENSE 3 - OUPUT 7 FIXED RESISTOR NOTE: Keep V1 < 0.3 volts for optimum regulation Typical Performance (Tc=25°C; Full Rated Load) 12S5.5000UW EFFICIENCY Vs. LINE INPUT 12S5.5000UW EFFICIENCY Vs. LOAD 84 LOAD A TRIM DOWN 12S5.5000UW INPUT CURRENT Vs. LINE INPUT VOLTAGE 85 5.0 LINE = 12VDC 83 50% FULL LOAD 81 100% FULL LOAD 80 79 78 INPUT CURRENT (AMPS) LINE = 7VDC 80 EFFICIENCY (%) EFFICIENCY (%) 82 LINE = 40VDC 75 70 4.0 3.0 2.0 100% FULL LOAD 1.0 77 50% FULL LOAD 76 65 5 10 15 20 25 LINE INPUT (VOLTS) 30 35 40 0.0 0 20 40 60 LOAD (%) 80 100 5 10 15 20 25 30 35 40 LINE INPUT (VOLTS) 2401 Stanwell Drive • Concord, California 94520 • Ph: 925/687-4411 or 800/542-3355 • Fax: 925/687-3333 • www.calex.com • Email: [email protected] 3 3/2001 25 to 45 Watt UW Single Series DC/DC Converters Typical Performance (Tc=25°C; Full Rated Load) 24S12.2500UW EFFICIENCY Vs. LINE INPUT 24S12.2500UW EFFICIENCY Vs. LOAD 24S12.3500UW INPUT CURRENT Vs. LINE INPUT VOLTAGE 85 92 4.0 LINE = 14VDC 80 EFFICIENCY (%) EFFICIENCY (%) 90 50% FULL LOAD 88 INPUT CURRENT (AMPS) LINE = 24VDC 100% FULL LOAD 75 70 65 LINE = 40VDC 60 55 86 3.0 2.0 1.0 50% FULL LOAD 50 10 15 20 25 30 35 40 100% FULL LOAD 0.0 0 20 40 LINE INPUT (VOLTS) 60 80 100 10 15 20 12S5.5000UW IDLE CURRENT Vs. LINE INPUT 24S15.3000UW INPUT CURRENT Vs. LINE INPUT VOLTAGE 25 30 35 40 LINE INPUT (VOLTS) LOAD (%) 24S15.3000UW IDLE CURRENT Vs. LINE INPUT 25 18 3.0 2.0 100% FULL LOAD 1.0 CURRENT (mAMPS) CURRENT (mAMPS) INPUT CURRENT (AMPS) 4.0 20 15 16 14 12 50% FULL LOAD 10 0.0 15 20 25 30 35 10 5 40 10 15 LINE INPUT (VOLTS) 20 25 30 35 40 15 20 25 LINE INPUT (VOLTS) 24S12.2500UW LINE TO OUTPUT TRANSFER FUNCTION 12S5.5000UW LINE to OUTPUT TRANSFER FUNCTION Vs FREQUENCY 30 35 40 LINE INPUT (VOLTS) OUTPUT VOLTAGE Vs. OUTPUT LOAD -20 120 -20 -50 OUTPUT VOLTAGE (%) ATTENUATION (dB) -40 -40 -50 -60 100 1K 60 40 0 100 10K 1K 0 10K 20 40 FREQUENCY (Hz) FREQUENCY (Hz) 60 80 100 120 140 OUTPUT LOAD (%) OUTPUT VOLTAGE Vs. CASE TEMPERATURE OUTPUT IMPEDANCE Vs. FREQUENCY 0.4 1 A 0.2 IMPEDANCE (OHMS) 100 80 20 -70 -60 NORMALIZED OUTPUT (%) ATTENUATION (dB) -30 -30 0.0 -0.2 -0.4 12V & 15V OUTPUT .1 5V OUTPUT .01 -0.6 -0.8 .001 -30 -20 -10 0 10 20 30 40 50 60 70 80 10 CASE TEMPERATURE (Deg C) 100 1K 10K 100K 1M FREQUENCY (Hz) 2401 Stanwell Drive • Concord, California 94520 • Ph: 925/687-4411 or 800/542-3355 • Fax: 925/687-3333 • www.calex.com • Email: [email protected] 4 3/2001