DC-DC Converter Overview

Worked for 2 mins 37 sec

ITX2415S

This is an isolated 6 W DC-DC converter module that takes a 24 V nominal input and generates dual regulated outputs of +15 V and -15 V, rated at 200 mA per rail.

What it is for

The ITX2415S is used when a circuit needs:

A bipolar power supply: +15 V / -15 V
Galvanic isolation between the input supply and the output rails
A compact, board-mount power module in an SIP-8 package

That makes it useful in circuits like:

Analog front ends
Op-amp and instrumentation circuits
Industrial control electronics
Sensor interfaces
Any design that needs an isolated split supply from a 24 V bus

Key functions and notable characteristics

From the datasheet, the key specs for ITX2415S are:

Table

Parameter	Value
Input range	18 V to 36 VDC
Nominal input family	24 VDC
Outputs	+15 V / -15 V
Output current	±200 mA
Power	6 W
Efficiency	84%
Isolation	1.5 kVDC input-to-output
Optional high-isolation version	3.0 kVDC with `-H` suffix
Operating temperature	-40°C to +90°C
Full power to	+65°C
Package	SIP-8
Ripple and noise	75 mV pk-pk
Regulation	Line reg ±0.2%, load reg ±1%
Protection	Continuous short-circuit protection with auto recovery

How it works in a circuit

At a system level, the ITX2415S is a self-contained isolated switching converter.

Functional flow

18-36 V input -> internal high-frequency conversion + transformer isolation -> regulated +15 V / common / -15 V outputs

Pin-level role

For the dual-output version, the datasheet shows:

Pin 1: -Vin
Pin 2: +Vin
Pin 3: Remote On/Off
Pin 5: +Vout
Pin 6: Common
Pin 7: -Vout
Pin 8: Case

So in use:

You feed your source supply into +Vin and -Vin
The module internally converts and isolates that power
It provides a floating dual rail on +Vout, Common, and -Vout

What “isolated” means here

The output is electrically isolated from the input by 1.5 kVDC, which helps:

Break ground loops
Protect low-level analog circuitry
Interface noisy industrial supplies to sensitive electronics
Create floating rails where needed

Practical behavior in a design

A few important operational characteristics:

No minimum load is required
Dual-output models have output balance of ±2%
Cross regulation is ±5% on dual-output parts when one rail changes load and the other stays fixed
The converter has continuous short-circuit protection with auto recovery
Remote control is available on variants with the -R option

Typical external circuitry

The module is designed to be easy to use, but the datasheet includes an EMI filter recommendation to help meet conducted emissions limits. For the ITX24 family input, the application note lists:

C1 = 10 µF / 50 V
L = 10 µH
C4 and C5 = 220 pF / 3 kV with the note that these parts should be placed as close as possible to the module.

So in many circuits, it can work as a near drop-in isolated power block, but for EMC performance you may still add the recommended input/output filtering.

ITX family / series overview

The ITX2415S belongs to XP Power’s ITX series of 6 W isolated DC-DC converters.

Common features across the ITX series

All ITX models share:

6 W power class
SIP-8 package
2:1 input range
Regulated outputs
1.5 kVDC isolation
Optional 3.0 kVDC isolation
Optional remote on/off
-40°C to +90°C operating range

Main variations in the family

The big differences between ITX series members are:

Table

Variation	Options
Input family	5 V nominal, 12 V nominal, 24 V nominal, 48 V nominal
Actual input ranges	4.5-9 V, 9-18 V, 18-36 V, 36-75 V
Single outputs	3.3 V, 5 V, 12 V, 15 V, 24 V
Dual outputs	±5 V, ±12 V, ±15 V
Isolation option	Standard 1.5 kVDC, optional 3.0 kVDC (`-H`)
Remote option	`-R` suffix

Where the ITX2415S fits in the series

The ITX2415S is the:

24 V input family member
dual-output ±15 V version

Compared to nearby variants:

ITX2412S gives ±12 V at ±250 mA
ITX2405S gives ±5 V at ±600 mA
ITX2415SA is a single-output +15 V model at 400 mA

Typical use cases by family member

Table

Model type	Best suited for
Single-output 3.3 V / 5 V	Isolated logic rails, digital subsystems, comms interfaces
Single-output 12 V / 15 V / 24 V	Isolated actuator, relay, or analog supply rails
Dual-output ±5 V	Lower-voltage analog and interface circuits
Dual-output ±12 V	General analog and industrial signal conditioning
Dual-output ±15 V	Precision analog, op-amps, instrumentation, older industrial analog standards

Bottom line

The ITX2415S is best thought of as a compact isolated bipolar power module for designs that start from a 24 V industrial-style rail and need clean, regulated ±15 V outputs. Its main strengths are:

compact size
isolation
regulated dual rails
wide 24 V-class input range
simple integration compared with building an isolated converter from scratch

If you want, I can also break down the part-number naming convention for the ITX series or explain the pinout and recommended application circuit next.

Use the selected part

Cover pins and circuit role

Application-focused explanation

+Vout

-Vout

Common

+Vin

-Vin

Reviews

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