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bdeytnae
Key Features
• Efficiency up to 87% • Low output noise • Six-sided shielding • Output synchronous rectification • Input-to-output isolation • Soft start • External synchronization • Short circuit protection • Thermal protection • Industry standard pinout
Q25
25-30W DC/DC Converter
2”×1”×0.45”
Low Noise, 4 to 1 Input Range, Single & Dual Models
1 2
bdeytnae
9 8
3 Q25S12/48 7
4 MADE IN USA 6
5
Beta Dyne is protected under various patents, including but not limited to U.S. Patent numbers: 5,777,519; 6,188,276; 6,262,901; 6,452,818; 6,473,3171.
Functional Description
The Q25 series is a 25-30W low noise isolated converter, consisting of 14 standard single & dual output models from 3.3VDC to 15 VDC and 4:1 input voltage range from 9V to 72V. Output synchronous rectification followed by a very low dropout linear regulator made possible to achieve up to 87% efficiency and less than 5mV output noise with external capacitors. Standard features include input undervoltage protection , external synchronization and thermal protection. The converter is packaged in a 1 x 2 x .45’’ metal case with six-sided shielding.
BETA DYNE INC • WWW.BETA-DYNE.COM
Typical Block Diagram
Q25 DC/DC CONVERTER • Q25_DS_RevA.PDF • PAGE 1 OF 9 http://www.Datasheet4U.com/
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 temperature 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 Ap.