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Product # PQ48020HKA20 Phone 1-888-567-9596 Doc.# 005-2HK420G Rev. C 4/9/03 Page 3 Half Half Brick Brick Technical Specification 48Vin 2.0Vout 20A Parameter Min. Typ. Max. Units Notes & Conditions ABSOLUTE MAXIMUM RATINGS Input Voltage Non-Operating 100 V continuous Operating 80 V continuous Operating Transient Protection 100 V < 10µs Isolation Voltage (input to output) 2000 V Basic insulation level, Pollution degree 2 Operating Temperature -40 100 °C Storage Temperature -55 125 °C Voltage at ON/OFF input pin -2 18 V Voltage at Clock Sync pin -15 18 V applies to Full Feature option only INPUT CHARACTERISTICS Operating Input Voltage Range 35 48 75 V Input Under-Voltage Lockout Turn-On Voltage Threshold 31.5 33.3 34.4 V Turn-Off Voltage Threshold 29.5 31.0 32.4 V Lockout Hysteresis Voltage 2.2 2.3 2.4 V Input Over-Voltage Shutdown 76.7 78.3 79.5 V Maximum Input Current 1.4 A 100% Load, 35 Vin No-Load Input Current 75 95 mA Disabled Input Current 2 5 mA Inrush Current Transient Rating 0.03 A2s Response to Input Transient TBD mV 1000V/ms input transient Input Reflected-Ripple Current 3 mA RMS thru 10µH inductor; Figs. 13 & 15 Recommended Input Fuse 20 A fast blow external fuse recommended Input Filter Component Values (C1\L\C2) 1.6\4\3.3 µF\µH\µF internal values, see Figure E Recommended External Input Capacitance 33 47 µF see Figure 13 OUTPUT CHARACTERISTICS Output Voltage Set Point 1.98 2.00 2.02 V Output Voltage Regulation Over Line +0.05 \ 1 +0.1 \ 2 %\mV Over Load +0.1 \ 2 +0.2 \ 4 %\mV Over Temperature +15 +30 mV Total Output Voltage Range 1.94 2.06 V over sample, line, load, temperature & life Output Voltage Ripple and Noise 20MHz bandwidth; Fig. 13 & 16 Peak-to-Peak 50 100 mV Full Load, see Figures 13 & 16 RMS 10 20 mV Full Load, see Figures 13 & 16 Operating Output Current Range 0 20 A Output DC Current-Limit Inception 22 24 26 A Output Voltage 10% Low; Fig. 17 Output DC Current-Limit Shutdown Voltage 0.98 V Current Share Accuracy (2 units paralleled) +2 +5 % % of rated output current Back-Drive Current Limit while Enabled 0.5 1.5 2.5 A Max negative current drawn from output Back-Drive Current Limit while Disabled 0 10 50 mA Max negative current drawn from output Maximum Output Capacitance >50,000 µF 2.0Vout at 20A Resistive Load DYNAMIC CHARACTERISTICS Input Voltage Ripple Rejection 80 dB 120 Hz; Fig. 20 Output Voltage during Load Current Transient Step Change in Output Current (0.1A/µs) 80 mV 50% to 75% to 50% Iout max; Figure 11 Step Change in Output Current (5A/µs) 80 mV 50% to 75% to 50% Iout max; Figure 12 Settling Time 300 µs to within 1% Vout nom Turn-On Transient Turn-On Time 20 30 ms Full load, Vout=90% nom.; Figs. 9 & 10 Start-Up Inhibit Time 180 200 215 ms -40°C to +125°C; Figure A Output Voltage Overshoot 0 % 10,000 µF load capacitance, Iout = 0A EFFICIENCY 100% Load 86 % Figures 1 - 4 50% Load 87 % Figures 1 - 4 TEMPERATURE LIMITS FOR POWER DERATING CURVES Semiconductor Junction Temperature 125 °C Package rated to 150°C Board Temperature 125 °C UL rated max operating temp 130°C Transformer Temperature 125 °C See Figures 5 - 8 for derating curves ISOLATION CHARACTERISTICS Isolation Voltage 2000 V Isolation Resistance 10 M Ω Isolation Capacitance 3300 pF PQ48020HKA20 ELECTRICAL CHARACTERISTICS TA=25°C, airflow rate=300 LFM, Vin=48Vdc unless otherwise noted; full operating temperature range is -40°C to +100°C ambient temperature with appropriate power derating. Specifications subject to change without notice. |
