Electrical Specifications
INPUT SPECIFICATIONS
PARAMETER
Input Voltage Range
Input Startup Voltage 24 VIN
Input Startup Voltage 48 VIN
Overvoltage Shutdown 24 VIN
Overvoltage Shutdown 48 VIN
Input Filter
No Load Input Current
Full Load Input Current
Input Surge Current (20µS Spike)
Short Circuit Current Limit
Off State Current
Remote ON/OFF Control
Supply ON
Supply OFF
Logic Input Reference
Logic Compatability
Unless otherwise specified, all parameters are given under typical ambient tem-
perature of +25°C with an airflow rate = 400LFM. With the given power derating, the
operating range is -40°C to +125°C. Specifications subject to change without notice.
CONDITION / NOTE
See model selection guide
LC
See model selection guide
See model selection guide
120% Of I @ Full Load
in
Pin 1 Open (Open circuit voltage: 10V Max.)
TTL Open Collector or CMOS Open Drain
MIN TYP MAX UNIT
Vdc
8 9 Vdc
14 17 Vdc
37 Vdc
73 Vdc
mA
A
10 A
150 µA
0 0.6 Vdc
OUTPUT SPECIFICATIONS
PARAMETER
Voltage
Output Voltage Accuracy
Output Current
Output Voltage Adjustment
Ripple & Noise
Line Regulation
Load Regulation
Temperature Coefficient @ FL
Transient Response Time
Short Circuit Protection
Turn On Delay with Soft Start
Output Overvoltage Protection
GENERAL SPECIFICATIONS
PARAMETER
Efficiency (at full power)
Isolation Voltage (1 min.), Input to Output
Isolation Resistance
Isolation Capacitance
Switching Frequency (FC)
c
External Sync Frequency (Fe)
CONDITION / NOTE
See model selection guide
See model selection guide
See Figure 15
For further reduction see Figure 1 & Figure 4
Minimum VIN to maximum VIN
NL to FL
50% FL to FL to 50% FL, See Figure 11 & 13
By input current limiting
See Figure 12 & 14
None
(See App. Note
CONDITION / NOTE
See model selection guide
All models
See figure 9
MIN TYP MAX UNIT
Vdc
1%
A
±5 ±10
%
40 mV
±.1 %
±.1 %
.01 .02 %/°C
100 µS
MIN TYP MAX UNIT
%
1500
Vdc
109 W
300 pF
200 kHz
210 kHz
BETA DYNE INC • WWW.BETA-DYNE.COM
Q25 DC/DC CONVERTER • Q25_DS_RevA.PDF • PAGE 2 OF 9
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