97MS2077
Rev. C - 08.01.03
Cherokee International
■
Headquarters
2841 Dow Avenue, Tustin CA. 92780 - USA
714.544.6665 (t)
■
714.838.4742 (f)
www.cherokeepwr.com
Features Benefits
■Low Profile ■Supports Tight Card Pitch requirements
■High Efficiency 91% at 3.3V ■Reduce footprint area operation without heatsink
■Wide range of operation (-40 to 85°C)
■
Supports extreme temperature conditions for wireless applications
Key Market Segments & Applications
■Switching equipment ■Wireless local loop
■Routers ■RF transmission
■Networking ■ATE Test Equipment and Semiconductor fabrication
■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
Standard Single Output Quarter Brick
Baseplate
Open Frame
Output: 1.2 to 3.3V dc @ 30A Input: 36 to 75V dc
APOLLO DC-DC Converters
Specifications QB3048XX DC-DC Converter, Single Output
Output Model: A1 B1 C1 D1 E1
Nominal Output Voltage (V) 3.3 2.5 1.8 1.5 1.2
Max Output Current (A) 30 30 30 30 30
Max Output Power (W) 100 75 54 45 36
Efficiency (typical at 48V DC input) 91% 89% 87% 85% 82%
Input Current (typical at 48V DC input) 2.29A 1.8A 1.30A 1.11A 0.92A
Input Voltage range 36 to 75V DC
Input Reflected Ripple Current 20 mA
Output Voltage Set Point +/- 50 mV
Line Regulation 0.1 % (36 to 75V DC; full load)
Load Regulation 0.1 % (no load to full load; 48V input)
Output Voltage Range (Trim) +/- 10 %
Max Ripple and Noise 100 mV pk-pk
Transient Response Max Deviation: 3 %; Settling Time < 100µS; 25 % step load change; 0.1A / µS
Over Current Protection Inception point: 110 to 135 %; Short Circuit - Hiccup Mode
Remote On / Off 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
Operating Temperature - 40 to 85 deg C Ambient
Output Overvoltage Unit latches off between 120% to 130%. Recycle input or remote on/off to restart.
Thermal Protection Auto restart. Thermal shut down at approximately 125 deg c.
Cooling Convection Cooled / Forced Air (Refer to derating curve)
Weight 35 g
Dimensions 1.45” x 0.417” x 2.28” (36.8mm x 10.6mm x 57.9mm) without baseplate
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
Output: 1.2 to 3.3V dc @ 30A Input: 36 to 75V dc
APOLLO DC-DC Converters
91
90
89
88
87
86
85
84
83
82
81
80
79 914192429
Output Current (Amps)
QB Efficiency vs Output Current
Efficiency (%)
V in = 36V V in = 48V V in = 75V
QB Transient Response for 3.3V (typical at 48Vin)
Load Step 50% to 75% at 0.1A/µs
M 100µs Ch3 42.4mV
Tek Run: 500kS/s Average
C1 Max
77mV
C1 Min
–78mV
Ch1 50.0mV BW
1
T
[]
Vout
Iout
35
30
25
20
15
10
5
025 35 45 65 75 95
Ambient Temperature (Degrees C)
Maximum Output Current (Amps)
55 85
QB Derating Curve for 3.3V (No Baseplate)
0 LFM 100 LFM 200 LFM 300 LFM 400 LFM
QB Output Ripple and Noise for 3.3V at full load
3M 2.00µs Ch1 6mV
Tek Stop: 25.0MS/s 18 Acqs
C1 Pk-Pk
77mV
Ch1 50.0mV BW
1
T
[]
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)
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.
Example: QB3048A1-1A
3.3Vout, Open Frame, Positive Logic
QB 30 48 XX X X – 1A
Remote ON/OFF –
Base-plate of Open-frame –
Output Voltage –
Input Voltage
Output Current
Model (Quarter Brick)
A1: 3.3V
B1: 2.5V
C1: 1.8V
D1: 1.5V
E1: 1.2V
Blank: Open-frame
B: Base-plate
Blank: +ve Logic
N: -ve Logic
-Vin
ON/OFF
+Vin
-Vout
-SENSE
TRIM
+SENSE
+Vout
Apollo Model Selection Guide Outline Drawing
* Height for open frame version: 0.417”
**Height for base plate version: 0.5”
