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PB_Q24T35_02_12_01
Industry-Standard Quarter-Brick Format
Q24T35 Family
18 Vdc - 36 Vdc In, 35A
Product Brief
The Q24T35 family of through-hole DC/DC converters offers unprecedented performance
in the industry-standard quarter-brick format. This is accomplished through the use of
patent pending circuit and packaging techniques to achieve ultra-high efciency,
excellent thermal performance and very low prole. In thermal environ-
ments common to telecommunications applications, the QTM Series
35A modules provide thermal performance that far exceeds all
quarter-bricks and is comparable even to existing “half-bricks”,
and all this in a height of only 0.29”. Low prole and the pre-
clusion of heatsinks minimizes airow “shadowing”, thus enhancing
cooling for down-stream devices. The use of 100% surface-mount tech-
nologies for assembly, coupled with di/dt’s advanced electric and thermal cir-
cuitry and packaging, result in products with extremely high quality and reliability.
The Q24T35 family is available in ve standard output voltages ranging from 3.3V to 1.5V.
Q24T35 MODULE
Complete efciency and thermal curves for each output voltage are
available upon request.
Features
• Delivers up to 35A
• Delivers higher current at 70°C than
existing 20A and 25A modules deliver at
40°C to 50°C
• Delivers performance comparable to
Half-Bricks in telecom thermal environments
• Industry-Standard footprint
• No Heatsink Required
• Height Only 0.29” (7.2mm)
• Weight: 27g (0.95oz)
• High Efciency: 89% @ 20A
• Industry-Standard size: 1.45” x 2.30”
• 2000V I/O Isolation
• Fixed Frequency Operation
• No Minimum Load Required
• Fully Protected
• Remote Sense
• Adjustable Output Voltage: +10%/-20%
• Industry-Standard external resistor values
• High Reliability
• Remote On/Off
• UL 1950, EN 60950 (pending)
Applications
• Telecommunications
• Datacommunications
• Wireless
EFFICIENCY
@ 20A
3.3V
2.5V
2.0V
1.8V
1.5V
OUTPUT CURRENT
@70°C, 200 LFM
OUTPUT
VOLTAGE
89.1%
87.7%
86.2%
85.0%
84.0%
22.5A
24.5A
26.5A
27.0A
28.0A