SQ24T/S03150 DC-DC Converter Data Sheet
19-36 VDC Input; 15 VDC Output @ 3.3 A
Features
RoHS lead-free solder and lead-solder-exempted
products are available
Delivers up to 3.3 A @ 15 V
Industry-standard quarter-brick pinout
2
Extremely small footprint: 0.896 x 2.30 (2.06 in ),
40% smaller than conventional quarter-bricks
Higher current capability at elevated temperatures
than most competitors' quarter-bricks
Onboard input differential LC-filter
High efficiency no heat sink required
Start-up into pre-biased output
No minimum load required
Available in through-hole and SM packages
Low profile: 0.274 (6.96 mm)
Low weight: 0.53 oz (15 g)
Meets Basic insulation requirements
Fixed-frequency operation
Fully protected
Applications
Remote output sense
Telecommunications
Output voltage trim range: +10%/20% with
Data communications Industry-standard trim equations
Wireless High reliability: MTBF of 3.4 million hours,
calculated per Telcordia TR-332, Method I Case 1
Servers
Positive or negative logic ON/OFF option
CAN/CSA C22.2, No. 60950-1/UL 60950-1
Second Edition, IEC/EN 60950-1 Second Edition
safety approved
Meets conducted emissions requirements of FCC
Class B and EN55022 Class B with external filter
All materials meet 94, V-0 flammability rating
Description
The SemiQ Family of DC-DC converters provide a high-efficiency single output in a size that is only 60% of
industry-standard quarter-bricks, while preserving the same pinout and functionality.
In high-temperature environments, the thermal performance of SemiQ converters exceeds that of most
competitors' quarter-bricks. This is accomplished through the use of patent pending circuit, packaging and
processing techniques to achieve ultra-high efficiency, excellent thermal management, and a very low body profile.
Low body profile and the preclusion of heat sinks minimize airflow shadowing, thus enhancing cooling for
downstream devices. The use of 100% automation for assembly, coupled with advanced electrical and thermal
design results in a product with extremely high reliability.
With a standard pinout and trim equations, the SQ24 Series converters are perfect drop-in replacements for
existing quarter-brick designs. Inclusion of this converter in new designs can result in significant board space and
cost savings. The device is also available in a surface mount package.
In both cases the designer can expect reliability improvement over other available converters because of the
SQ24 Series optimized thermal efficiency.
MCD10160 Rev.1.0, 01-Jun-10 Page 1 of 16 www.power-one.com SQ24T/S03150 DC-DC Converter Data Sheet
19-36 VDC Input; 15 VDC Output @ 3.3 A
Electrical Specifications
Conditions: T =25 C, Airflow=300 LFM (1.5 m/s), Vin=24 VDC, All output voltages, unless otherwise specified.
A
PARAMETER NOTES MIN TYP MAX UNITS
ABSOLUTE MAXIMUM RATINGS
Input Voltage Continuous 0 40 VDC
Operating Ambient Temperature -40 85 C
Storage Temperature -55 125 C
INPUT CHARACTERISTICS
Operating Input Voltage Range 19 24 36 VDC
Input Under Voltage Lockout Non-latching
Turn-on Threshold 16 17 17.5 VDC
Turn-off Threshold 15 16 16.5 VDC
ISOLATION CHARACTERISTICS
I/O Isolation 2000 VDC
Isolation Capacitance: 230 pF
Isolation Resistance 10 M
FEATURE CHARACTERISTICS
Switching Frequency 415 kHz
1
Output Voltage Trim Range Industry-std. equations -20 +10 %
1
Remote Sense Compensation Percent of V (NOM) +10 %
OUT
Output Over-Voltage Protection Non-latching 117 125 140 %
Auto-Restart Period Applies to all protection features 100 ms
Turn-On Time 4 ms
ON/OFF Control (Positive Logic)
Converter Off -20 0.8 VDC
Converter On 2.4 20 VDC
ON/OFF Control (Negative Logic)
Converter Off 2.4 20 VDC
Converter On -20 0.8 VDC
Additional Notes:
1. Vout can be increased up to 10% via the sense leads or up to 10% via the trim function for Vin > 21 V; however total output voltage trim
from all sources should not exceed 10% of V (NOM), in order to insure specified operation of overvoltage protection circuitry. Vout can be
OUT
increased up to 5% for Vin > 20V.
MCD10160 Rev.1.0, 01-Jun-10 Page 2 of 16 www.power-one.com