PISCES II DC/DC CONVERTERS POWER PRODUCTS 48V Input – 1.8VDC – 60A Output G2PW1V860 G2PW1V860 – 1/4 Brick Pisces II Series • • • • • • • • • • • • Industry standard pinout and footprint Very low dissipation No heat sink required for most applications Low profile, 0.38" High efficiency: 90% at 1.8V, 60A; 91% at 1.8V, 30A Very low common-mode noise for a commercial DC/DC converter Two-stage input filter Constant switching frequency Remote sense, wide trim range Single board design, very low parts count Optional baseplate or low profile heat sink for improved thermal performance Header with M3 metal inserts for mechanical connection to PCB Control Functions • • • Typical Characteristics Uses patented power supply control and architecture Microprocessor controlled Primary-side enable, choice of logic • • • • Protection Features • • • • Over temperature protection Over voltage protection Over current protection Over/Under input voltage protection • • Output setpoint accuracy: ± 1% Load regulation: ± 0.2% Line regulation: ± 0.2% Regulation over line, load, and temperature: ± 2% Low output ripple Output trim Example Part Number: Ordering Information Standard Model Number G2PW1V860* * Options: P = Positive Logic Version; High = On Input Voltage Output Voltage Max Current 48V 1.8V 60A E = 0.18" Pins (± .01") M = 0.145" Pins (± .01") S = 0.12" Pins (± .01") Pisces II Heat Sink Part Numbers R = Heat Sink Ready T = Tuned model** (All options) G2PW1V860 PS RT 0 0 X Part Number Options: Positive Logic Version Optional Pin Lengths E = 0.18" M = 0.145" S = 0.12" Heat Sink Ready Tuned Model Heat Sink Typical Thermal Performance Part Number Height Natural Convection Power Dissipation† Forced Convection Thermal Resistance‡ 001 0.25" 5W 5.8˚ C/W 002 0.50" 7W 3.2˚ C/W 003 1.00" 11W 2.0˚ C/W 004 0.13" TBD TBD 005 0.70" TBD TBD † @ 60˚ C rise heat sink to ambient ** T (Tuned Model) Option Designed for higher di/dt and ∆l applications, the transient response has been modified to take advantage of the capacitance on the customer’s PCB. This unit requires a minimum load capacitance of 5600µF with an impedance magnitude of less than 0.005Ω at 15kHz. It offers a minmum 3X improvement in the peak response compared to a standard unit. Consult factory. ‡ @ 300'/min. ©2006 Bel Fuse Inc. Specifications subject to change without notice. 11.06 Bel Power Inc. 155 Flanders Road, Westborough, MA 01581 • Tel 508-870-9775 • Fax 508-870-9796 • www.belpower.com page 1 POWER PRODUCTS PISCES II DC/DC CONVERTERS 48V Input – 1.8VDC – 60A Output G2PW1V860 Input Specifications Parameter Operating Input Voltage Min Typical Max Units 36 48 75 VDC 6 A Input Current Input Capacitance 4 µF Input Hysteresis, Low Line 2 VDC VIN = 48VDC, TA@25˚ C, 300 LFM Airflow, VOUT = 1.8VDC, IOUT = Full load unless otherwise noted. Available output power depends on ambient temperature and good thermal management. (See application graphs for limits.) Output Specifications Parameter Min Max Units 102 %VNOM Voltage Ripple 25 mV RMS Voltage Ripple, 20MHz BW 85 mV P–P 0 60 A 103 140 %IOUT Short Circuit Current, Peak1 90 A Output Transient Response, 50% to 75% Load Change, 1A/µsec 5 %VOUT Settling Time to ± 1% 200 µS Turn-on Time to 98% Vnom 35 mS Regulation Over Line, Load & Temperature Current Range Current Limit Inception 98 Output Overshoot at Turn-on Trim Range Typical 0 70 Over Voltage Protection, Latching %VOUT 110 130 %VOUT %VOUT 1. During short circuit, converter will shut down and attempt to restart once per second. The average current during this condition will be very low and the device can be safely left in this condition continuously. ©2006 Bel Fuse Inc. Specifications subject to change without notice. 11.06 Bel Power Inc. 155 Flanders Road, Westborough, MA 01581 • Tel 508-870-9775 • Fax 508-870-9796 • www.belpower.com page 2 PISCES II DC/DC CONVERTERS POWER PRODUCTS 48V Input – 1.8VDC – 60A Output G2PW1V860 Isolation Specifications Parameter Min Typical Max Units Isolation Test Voltage, Input/Output (Basic) 2250 VDC Isolation Test Voltage, Input/Case 2000 VDC Isolation Test Voltage, Output Case 500 VDC Isolation Resistance 10 MΩ Features Parameter Min Typical Over Temperature Protection, Thermal Sensor, Latching2 Switching Frequency, Fixed Max Units 110 ˚C 250 kHz 2. PCB less than 130˚ C. Approvals and Standards General Specifications Operating Temperature Storge Temperature Relative Humidity Vibration Material Flammability Weight -40˚ C to + 100˚ C -55˚ C + 125˚ C 10% to 95% RH, Non-condensing 2 to 9 Hz, 3mm disp., 9 to 200 Hz, 1g UL V-0 35 grams MTBF Telcordia (Bellcore) 1.6 million hours UL and c-UL Recognized Component, TUV**, UL60950, CSA 22.2 No. 950, IEC/EN 60950 EMC Characteristics: Designed to meet emission and immunity requirements per EN55022, CISPR 22, Class B, and CISPR 24. ** An external fuse shall be used to comply with the requirements. ©2006 Bel Fuse Inc. Specifications subject to change without notice. 11.06 Bel Power Inc. 155 Flanders Road, Westborough, MA 01581 • Tel 508-870-9775 • Fax 508-870-9796 • www.belpower.com page 3 PISCES II DC/DC CONVERTERS POWER PRODUCTS 48V Input – 1.8VDC – 60A Output G2PW1V860 Application Notes CoolConverter™ Bel Power’s Proprietary CoolConverter™ • Patented single-stage power conversion architecture, control and magnetic design allow unprecedented power density and efficiency in an isolated power supply. • An advanced microcontroller reduces parts count while adding features, performance and flexibility in the design. • Low common-mode noise results from lower capacitance in the transformer from balanced winding design. Protection and Control Over Voltage Hysteresis 6 Output Voltage (V) Valid Input Voltage Range The converter measures the input voltage and will not allow operation outside of the input voltage specification. As shown by the graphs, hysteresis is added to both the high and low voltage to prevent the converter from turning on and off repeatedly when the voltage is held near either voltage extreme. At low line, this assures the maximum input current is not exceeded; at high line, this assures the semiconductor devices in the converter are not damaged by excessive voltage stress. ON/OFF Logic Option The ON/OFF control logic can be either Negative (standard) or Positive to enable the converter. For Negative logic, the ON/OFF pin is brought to below 1.0V with respect to the –INPUT pin to enable the converter. The pull-down must be able to sink 100µA. For Positive logic, the ON/OFF pin is brought to greater than 4.0V with respect to the –INPUT pin and be limited to less than 10V. To request the Positive logic version, add the suffix (P) to the standard part number. The ON/OFF pin has a built-in pull-up resistor of approximately 100kΩ to +5V. ©2006 Bel Fuse Inc. 4 3 2 1 0 76.5 77 77.5 78 78.5 79 79.5 80 Under Voltage Hysteresis 6 5 4 3 2 1 0 30 31 32 33 34 35 36 Input Voltage (V) Specifications subject to change without notice. 11.06 Bel Power Inc. 155 Flanders Road, Westborough, MA 01581 • Tel 508-870-9775 • Fax 508-870-9796 • www.belpower.com page 4 80.5 Input Voltage (V) Output Voltage (V) Output Over Voltage Protection The output voltage is constantly monitored by the microprocessor with a redundant secondary-side measurement circuit that both shuts down the duty cycle and triggers the microprocessor to shut down. If the output voltage exceeds the over voltage specification, the microprocessor will latch the converter off. To turn the converter on required either cycling the ON/OFF pin or power to the converter. This advanced feature prevents the converter from damaging the load if there is a converter failure or application error. If nonlatching is required, consult factory. 5 37 PISCES II DC/DC CONVERTERS POWER PRODUCTS 48V Input – 1.8VDC – 60A Output G2PW1V860 CoolConverter™ Protection and Control Thermal Shutdown The printed circuit board temperature is measured using a semiconductor sensor. If the maximum rated temperature is exceeded, the converter is latched off. To re-enable the converter requires cycling the ON/OFF pin or power to the converter. If non-latching is required, consult factory. Trim-up Rtrim-UP { = 1.8 (100+∆%) _ 1.225∆% (100+2∆%) ∆% } 5.11kΩ 1.8V Trim-up Trim Resistance (kΩ) Control Options As the behavior of the circuit is determined by firmware in the microcontroller, specific requirements, such as: • non-latching thermal protection • custom valid input voltage range • controlled delay from initiating an ON/OFF signal for power sequencing can be accomplished with no change to hardware. The standard behavior was chosen based on system design experience, but customers may have their own requirements. Please contact Bel Power for any special needs. 1000 100 10 0 1 2 3 4 5 6 7 8 9 10 Increase in Output Voltage (%) Remote Sense The output voltage is regulated at the point where the sense pins connect to the power output pins. Total sense compensation should not exceed 0.4V or 10% of Vout, whichever is greater. Trim-down Safety An external input fuse must always be used to meet these safety requirements. Rtrim-DOWN = External Output Trimming Trim To trim the output voltage higher, connect the required trim resistor from the Trim pin to the +Sense pin. To trim the output voltage lower, connect the required trim resistor from the Trim pin to the –Sense pin. } 5.11kΩ 1000 Trim Resistance (kΩ) – Sense 100 _ 2 ∆% Trim-down + Sense Trim { 100 10 0 1 2 3 4 5 6 7 8 9 10 Decrease in Output Voltage (%) ©2006 Bel Fuse Inc. Specifications subject to change without notice. 11.06 Bel Power Inc. 155 Flanders Road, Westborough, MA 01581 • Tel 508-870-9775 • Fax 508-870-9796 • www.belpower.com page 5 PISCES II DC/DC CONVERTERS POWER PRODUCTS 48V Input – 1.8VDC – 60A Output G2PW1V860 Power Dissipation Power Dissipation 92 18 90 16 Power Dissipation (W) Efficiency (%) Efficiency Data Efficiency 88 86 84 82 36V Vin 48V Vin 75V Vin 80 78 0 10 20 30 40 50 60 14 12 10 8 36V Vin 48V Vin 75V Vin 6 4 2 0 0 10 Output Current (A) 20 30 40 50 60 Output Current (A) Start Up Start Up Voltage Ripple Voltage Ripple CH2 CH3 CH1 1) Vout 20mV/div 2µS/div 1) Vout 500mV/div 4mS/div 2) Iout 10A/div 3) Enable 5V/div 1.10µF VOUT 2µS/div ext cap20mV/div 2MHz BW 10µF ext cap 2MHz BW 1. VOUT 500mV/div 4mS/div 2. IOUT 10A/div 3. Enable 5V/div Line/Load Line/Load Regulation Regulation Transient TransientResponse Response Output Voltage (V) 1.81 Setpoint Accuracy 0.3000% Line Regulation 0.0201% Load Regulation 0.0134% Line & Load Regulation 0.0234% 1.80 CH1 1.79 36V Vin 48V Vin 75V Vin 1.78 1.77 0 10 20 30 40 50 CH2 60 Output Current (A) ©2006 Bel Fuse Inc. 1) Vout 200mV/div 200µS/div 1.2) Iout VOUT 10A/div200mV/div 200µS/div 2. IOUT 10A/div Specifications subject to change without notice. 11.06 Bel Power Inc. 155 Flanders Road, Westborough, MA 01581 • Tel 508-870-9775 • Fax 508-870-9796 • www.belpower.com page 6 PISCES II DC/DC CONVERTERS POWER PRODUCTS 48V Input – 1.8VDC – 60A Output G2PW1V860 Back Bias Back Bias Over Current Protection Note: Over current protection isProtection blip-mode (aka hiccup). Over-current Note: Over-current protection is blip-mode (aka hiccup). 2.0 Output Voltage (V) 1.8 1.6 1.4 1.2 1.0 0.8 36V Vin 48V Vin 75V Vin 0.6 0.4 0.2 0 1) Vout 1V/div 20mS/div 61 63 65 1. VOUT 1V/div 20mS/div 67 69 71 Output Current (A) Over Voltage Protection Over Voltage Protection Thermal ThermalDerating Derating 60 Output Current (A) 50 40 30 20 10 0 1) Vout 500mV/div 2mS/div 1. VOUT 500mV/div 2mS/div Open Frame: 300 LFM 200 LFM 100 LFM 0 10 20 30 40 50 60 70 80 90 Ambient Temperature (°C) ©2006 Bel Fuse Inc. Specifications subject to change without notice. 11.06 Bel Power Inc. 155 Flanders Road, Westborough, MA 01581 • Tel 508-870-9775 • Fax 508-870-9796 • www.belpower.com page 7 .815 .665 .515 .365 .215 .815 PIN 1 B A A PIN 8 PIN 7 PIN 6 .515 PIN 2 A .215 PIN 3 PIN 4 0 0 TOP VIEW MOUNTING INSERT M3 X 0.5 4 PLACES .210 POWER PRODUCTS 2.000 PIN TO PIN Mechanical 0 48V Input – 1.8VDC – 60A Output .210 .070 1.860 PISCES II DC/DC CONVERTERS G2PW1V860 2.28 G2PW1V860 1.030 1.030 1.45 B PIN 1 .815 A PIN 2 .515 A .515 PIN 6 PIN 3 .215 A .215 PIN 4 .815 PIN 8 0 BOTTOM VIEW .210 0 .070 2.000 PIN TO PIN MOUNTING INSERT M3 X 0.5 4 PLACES 1.860 .210 0 0.38 0.20 Pin Configuration – Bottom View Pin Function Pin Dia. (In.) 1 – Input 0.040 2 On/Off 0.040 3 + Input 0.040 4 + Output 0.060 5 + Sense 0.040 6 Trim 0.040 7 – Sense 0.040 8 – Output 0.060 SIDE VIEW Notes: 0.38 1. Mechanical tolerances x.xxx in. = ± 0.005 in. x.xx in = ±0.06 0.01 in. SIDE VIEW (Surface Mount with studs) 0.010 ±0.008 0.030 2. Pin material: Brass with tin/lead plating over nickel 3. Workmanship: Meets or exceeds IPC-A-610B Class II 4. "A" = 0.040" dia. pins 5. "B" = 0.060" dia. pins 6. Min. screw length for heat sink attachment = 4.5mm + heat sink flange + locking hardware RoHS Compliance Complies with the European Directive 2002/95/EC, calling for the elimination of lead and other hazardous substances from electronic products. These parts are not however compatible with the higher temperatures associated with lead free solder processes and must be soldered using a reflow profile with a peak temperature of no more than 240˚C. ©2006 Bel Fuse Inc. Specifications subject to change without notice. 11.06 CORPORATE FAR EAST EUROPE Bel Fuse Inc. 206 Van Vorst Street Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com Bel Fuse Ltd. 8F / 8 Luk Hop Street San Po Kong Kowloon, Hong Kong Tel 852-2328-5515 Fax 852-2352-3706 www.belfuse.com Bel Fuse Europe Ltd. Preston Technology Management Centre Marsh Lane, Suite G7, Preston Lancashire, PR1 8UD, U.K. Tel 44-1772-556601 Fax 44-1772-888366 www.belfuse.com page 8 1.45