APOLLO DC-DC Converters Output: 1.2 to 3.3V dc @ 30A Input: 36 to 75V dc Standard Single Output Quarter Brick 30A in a Quarter Brick Footprint Small Footprint (1.45"x0.417"X2.28") High Efficiency: 91% typical, 3.3V Constant Frequency Operation Over current, Over voltage, Overtemp protection, Remote on/off Meets ETSI 300-321-2 Isolation Safety approvals: UL, cUL & TUV Optional Base plate available Open Frame Features Baseplate Benefits Low Profile High Efficiency 91% at 3.3V Wide range of operation (-40 to 85C) Supports Tight Card Pitch requirements Reduce footprint area operation without heatsink Supports extreme temperature conditions for wireless applications Key Market Segments & Applications Switching equipment Routers Networking Wireless local loop RF transmission ATE Test Equipment and Semiconductor fabrication Specifications Output Model: Nominal Output Voltage (V) Max Output Current (A) Max Output Power (W) Efficiency (typical at 48V DC input) Input Current (typical at 48V DC input) Input Voltage range Input Reflected Ripple Current Output Voltage Set Point Line Regulation Load Regulation Output Voltage Range (Trim) Max Ripple and Noise Transient Response Over Current Protection Remote On / Off Operating Temperature Output Overvoltage Thermal Protection Cooling Weight Dimensions QB3048XX DC-DC Converter, Single Output A1 B1 C1 D1 3.3 2.5 1.8 1.5 30 30 30 30 100 75 54 45 91% 89% 87% 85% 2.29A 1.8A 1.30A 1.11A 36 to 75V DC 20 mA +/- 50 mV 0.1 % (36 to 75V DC; full load) 0.1 % (no load to full load; 48V input) +/- 10 % 100 mV pk-pk Max Deviation: 3 %; Settling Time < 100S; 25 % step load change; 0.1A / S Inception point: 110 to 135 %; Short Circuit - Hiccup Mode On / Off pin: Open (Logic High) = Unit On; Shorted to -Vin (Logic Low) = Unit Off Positive logic is Standard, Negative logic available as an option; 0.6 mA Sink Current - 40 to 85 deg C Ambient Unit latches off between 120% to 130%. Recycle input or remote on/off to restart. Auto restart. Thermal shut down at approximately 125 deg c. Convection Cooled / Forced Air (Refer to derating curve) 35 g 1.45" x 0.417" x 2.28" (36.8mm x 10.6mm x 57.9mm) without baseplate Cherokee International Headquarters 2841 Dow Avenue, Tustin CA. 92780 - USA 714.544.6665 (t) 714.838.4742 (f) www.cherokeepwr.com E1 1.2 30 36 82% 0.92A Cherokee International European Operations Boulevard de l'Europe, 131 B-1301 Wavre - Belgium +32.10.438.510 (t) +32.10.438.213 (f) 97MS2077 Rev. C - 08.01.03 APOLLO DC-DC Converters Output: 1.2 to 3.3V dc @ 30A Input: 36 to 75V dc Outline Drawing Apollo Model Selection Guide QB 30 48 XX X X - 1A Remote ON/OFF - Blank: +ve Logic N: -ve Logic Base-plate of Open-frame - Blank: Open-frame B: Base-plate Output Voltage - A1: 3.3V B1: 2.5V Input Voltage C1: 1.8V Output Current D1: 1.5V E1: 1.2V Model (Quarter Brick) -Vin ON/OFF +Vin -Vout -SENSE TRIM +SENSE +Vout Example: QB3048A1-1A 3.3Vout, Open Frame, Positive Logic * Height for open frame version: 0.417" **Height for base plate version: 0.5" QB Derating Curve for 3.3V (No Baseplate) Maximum Output Current (Amps) Efficiency (%) QB Efficiency vs Output Current 91 90 89 88 87 86 85 84 83 82 81 80 79 9 14 19 24 29 35 30 25 20 15 10 5 0 25 35 V in = 36V V in = 48V 45 65 55 75 85 95 Ambient Temperature (Degrees C) Output Current (Amps) 0 LFM V in = 75V QB Transient Response for 3.3V (typical at 48Vin) 100 LFM 200 LFM 300 LFM 400 LFM QB Output Ripple and Noise for 3.3V at full load Load Step 50% to 75% at 0.1A/s Tek Run: 500kS/s Average Tek Stop: 25.0MS/s [ T ] [ 18 Acqs T ] C1 Max 77mV Vout C1 Pk-Pk 77mV 1 C1 Min -78mV 1 Iout 3 Ch1 50.0mV B W M 100s Ch3 42.4mV Ch1 50.0mV B W M 2.00s Ch1 6mV Cherokee reserves the right to make changes to the product described without notice. No liability is assumed as a result of its use nor for any infringement on the rights of others. Cherokee International Headquarters 2841 Dow Avenue, Tustin CA. 92780 - USA 714.544.6665 (t) 714.838.4742 (f) www.cherokeepwr.com Cherokee International European Operations Boulevard de l'Europe, 131 B-1301 Wavre - Belgium +32.10.438.510 (t) +32.10.438.213 (f) 97MS2077 Rev. C - 08.01.03