Powersolve PSQ125 User Manual

High Density DC-DC Modules

PSQ125 Series

www.powersolve.co.uk

40-125 Watt
DC-DC Converters
Single Output

Features

• Quarter brick package

• Regulated outputs

• Efficiency to 92%

• 1500VDC isolation

• Input under voltage protection

• Over current & Over temperature protection

• Remote On/Off control

Electrical Specification

INPUT

Input Voltage Range 36 ~ 75V
Undervoltage Lockout 35V (Vin power up)

Positive Logic Remote ON/OFF Open collector ref. to -Input, Module ON: Open circuit, Module OFF: <1.2VDC

Input Filter PI Type

33V (Vin power down)

Add suffix N to Model Number for Negative Logic Remote ON/OFF control

OUTPUT

Voltage Accuracy ±1.0% max.
Transient Response: 25% Step Load Change <500µsec
External Trim Adj. Range ±10%
Ripple & Noise, 20MHz BW 100mV pk-pk max.

ENVIRONMENTAL

Temperature Coefficient ±0.03%/°C max.
Short Circuit Protection Continuous / Hiccup
Line Regulation ±0.2% max. measured over full input voltage range
Load Regulation ±0.5% max. measured from 0-100% load
Over Voltage Protection trip range, % Vo nom. 115% ~ 140%
Current Limit 110% ~ 150% Nominal Output

GENERAL

Efficiency See table
Isolation Voltage 1500VDC min
Isolation Resistance 107ohms min.
Switching Frequency 200KHz typ.

Over Temperature Protection 120°C typ.
Operating Ambient Temperature Range -40°C to +85°C
Storage Temperature Range -40°C to +125°C
Dimensions 2.30 x 1.45 x 0.42 inches

Weight 40g

120mV pk-pk max. (5V & 12V output versions)
measured with a 10µF tantalum & 1.0µF ceramic capacitor across the output

250KHz typ. (3.3V & 2.5V output versions)
300KHz typ. (5V & 12V output versions)

58.4 x 36.8 x 10.6 mm

Powersolve Electronics Ltd. 8A Arnhem Road, Newbury, RG14 5RU. England

Tel: [phone] Fax: [phone] Email: [e-mail]

High Density DC-DC Modules

www.powersolve.co.uk

Output Voltage and Current Ratings

MODEL INPUT OUTPUT OUTPUT INPUT CURRENT % EFF.

PSQ125-48S1V0 1.0 VDC 40A 60mA 1016mA 82
PSQ125-48S1V2 1.2 VDC 40A 60mA 1190mA 84
PSQ125-48S1V5 1.5 VDC 40A 60mA 1453mA 86
PSQ125-48S1V8 1.8 VDC 40A 60mA 1724mA 87
PSQ125-48S2V5 36-75 VDC 2.5 VDC 40A 80mA 2341mA 89
PSQ125-48S3V3 3.3VDC 35A 80mA 2673mA 90
PSQ125-48S05 5VDC 25A 100mA 2861mA 91
PSQ125-48S12 12VDC 10A 100mA 2717mA 92

NOTE: Nominal Input Voltage 48VDC

Mechanical and Connection Details

VOLTAGE VOLTAGE CURRENT max. NO LOAD FULL LOAD

Pin Function

1 +Vin
2 ON/OFF
3 -Vin
4 -Vout
5 -Sense
6 Trim
7 +Sense
8 +Vout

All dimensions in inches (mm)
Tolerances: Inches x.xx ±0.02 x.xxx ±0.010

Remote ON/OFF Control

The PSQ125 Series allows the user to switch the module on and off electronically with the remote on/off feature.
The PSQ125 Series are available with “positive logic” or “negative logic” (option).

Logic Table

External Output Trim

The output can be trimmed externally (±10%) using a fixed resistor or
a trimpot as shown.

Logic State

(Pin 2)

Logic low-

Switch closed

Logic high-

Switch open

The output noise is measured with a 10µF tantalum and a 1.0µF
ceramic capacitor across the output.

+Vout

Negative

Logic

Module on Module off

Module off Module on

Output Noise

Pin Connection

Millimeters x.x ±0.5 x.xx ±0.25

Positive

Logic

-Vout

All specifications typical at nominal line, full load and 25°C unless otherwise stated.

Powersolve Electronics Ltd. 8A Arnhem Road, Newbury, RG14 5RU. England

Tel: [phone] Fax: [phone] Email: [e-mail]

High Density DC-DC Modules

www.powersolve.co.uk

Application Note

Derating:
The operating temperature range of the PSQ125 series is -40°C to +85°C. When operating the PSQ125 series, proper derating or
cooling is required.

Following is the derating curve for the PSQ125.

300LFM
200LFM
100LFM

20LFM

Powersolve Electronics Ltd. 8A Arnhem Road, Newbury, RG14 5RU. England

Tel: [phone] Fax: [phone] Email: [e-mail]