DC-DC Converter Overview
2:37
Clarifying project specifics.
Explaining part specifications.
Looking for "ITX2415S purpose, description, input voltage range, output voltages, output currents, isolation, package, operating temperature, and notable features" in SF_ITX.pdf
Looking for "ITX2415S operation in circuit, typical application, block diagram or description of isolated DC DC converter operation, and external component requirements" in SF_ITX.pdf
Looking for "ITX series product range, model variants, input ranges, single versus dual output options, voltage options, and differences between family members" in SF_ITX.pdf
ITX2415S
How it works in a circuit
Pin-level role
Where the ITX2415S fits in the series
Bottom line
What it is forThis 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.
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
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 |
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 outputsFor 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
+Vinand-Vin - The module internally converts and isolates that power
- It provides a floating dual rail on
+Vout,Common, and-Vout
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
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
-Roption
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 VL = 10 µHC4 and C5 = 220 pF / 3 kVwith 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
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 |
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
| 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 |
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.
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Application-focused explanation
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