B1215S-2W
9-18V to 15V 2W wide input isolation module, ideal for 12V battery-powered systems
Product Overview
Description
The B1215S-2W is a wide input DC-DC power module in Aipu Electronics' B series, featuring 9-18V wide input range suitable for 12V battery-powered applications.
This module accepts input voltage from 9V to 18V, making it compatible with 12V lead-acid batteries, Li-ion batteries, and systems with voltage fluctuations. The 4:1 input range ensures stable operation throughout battery discharge cycle.
With 1500VDC isolation voltage and 84% efficiency, the B1215S-2W provides reliable isolated power for industrial control, vehicle electronics, and portable equipment applications.
Product Series
B
Primary Application
12V battery-powered systems
Key Features
- Wide input range 9-18VDC (4:1 ratio)
- Output voltage 15VDC, power 2W
- Isolation voltage 1500VDC
- High efficiency 84%
- SIP7 package
- Industrial temperature range -40C to +85C
- Input undervoltage protection
- Short circuit protection
Specifications
| Input Voltage Range | 9-18VDC |
|---|---|
| Output Voltage | 15VDC |
| Output Power | 2W |
| Output Current | 133mA |
| Isolation Voltage | 1500VDC |
| Efficiency | 84% typ |
| Operating Temperature | -40C ~ +85C |
| Package | SIP7 |
Applications
12V battery-powered systems
Battery and charging management
Vehicle electronics
Automotive and EV electronics
Industrial control systems
Industrial automation and control
Portable equipment
Electronic system design
Remote monitoring systems
Electronic system design
FAE Expert Insights
"I have extensive experience using B1215S-2W in battery-powered industrial equipment. This module's wide 9-18V input range is perfect for 12V lead-acid battery applications. I've used it in solar-powered monitoring systems where battery voltage varies significantly throughout the day - the module maintains stable 15V output from fully charged to nearly depleted battery states. The 84% efficiency is quite good for a wide input module, and the input undervoltage protection prevents battery over-discharge, extending battery life. In one remote monitoring application, we used B1215S-2W to power communication modules and sensors, running continuously for over 3 years on a 12V 100Ah battery with solar charging. The module's reliability has been excellent with zero failures. I particularly appreciate the automatic recovery from short circuits - during field installation, accidental shorts sometimes occur, and the module handles these gracefully without permanent damage. For any 12V battery-powered application requiring 15V output, I strongly recommend B1215S-2W for its reliability and flexibility."
Wide input range perfect for batteries, undervoltage protection extends battery life, excellent field reliability
— Li Ming, BeiLuo
Frequently Asked Questions
What battery types are compatible with B1215S-2W?
The B1215S-2W (9-18V input range) is compatible with multiple 12V battery types: 1) 12V lead-acid batteries: nominal 12V, range 10.8-13.8V (charging), fully covered by 9-18V range; 2) 3S Li-ion batteries: nominal 11.1V, range 9-12.6V, fully compatible; 3) 4S LiFePO4 batteries: nominal 12.8V, range 10-14.6V, compatible with margin; 4) 12V NiMH batteries: nominal 12V, range 10-14.4V, fully compatible. The wide 9-18V range accommodates voltage variations from fully charged to deeply discharged states for all these battery types.
B1215S-2W works with 12V lead-acid, 3S Li-ion, 4S LiFePO4, and 12V NiMH batteries. Verify battery voltage range falls within 9-18V.
How does B1215S-2W handle battery voltage drop during discharge?
The B1215S-2W handles battery voltage drop through its wide 9-18V input range and internal regulation: 1) As battery voltage drops from fully charged (13.8V for lead-acid) to nominal (12V) to discharged (10.8V), the module maintains stable 15V output; 2) Internal control circuitry automatically adjusts duty cycle to compensate for input voltage changes; 3) Input undervoltage protection prevents operation below 9V, protecting battery from over-discharge; 4) Output voltage regulation remains within +/-1% across entire input range. This ensures consistent system operation throughout battery discharge cycle without manual adjustments.
Wide input range maintains stable output throughout battery discharge. Undervoltage protection prevents battery over-discharge.
What is the efficiency difference between fixed and wide input modules?
Wide input modules typically have slightly lower efficiency than fixed input modules due to additional circuitry required for wide range operation: 1) Fixed input A1215S-2W: 86% typical efficiency at full load; 2) Wide input B1215S-2W: 84% typical efficiency at full load; 3) The 2% efficiency difference means slightly higher heat generation in wide input modules. However, the flexibility of wide input often outweighs this small efficiency penalty in battery-powered and voltage-fluctuating applications. For maximum efficiency in stable voltage applications, choose fixed input modules. For flexibility in varying voltage environments, accept the small efficiency trade-off with wide input modules.
Wide input modules have 2-3% lower efficiency than fixed input. Choose based on whether voltage flexibility or maximum efficiency is more important.
Can B1215S-2W be used in vehicle 12V systems?
Yes, B1215S-2W is well-suited for vehicle 12V systems: 1) Vehicle 12V systems typically range from 9V (cranking) to 16V (alternator charging), fully within B1215S-2W's 9-18V range; 2) The module handles voltage transients common in vehicle systems (load dump, cold crank); 3) -40C to +85C temperature range covers vehicle operating environments; 4) High reliability design suitable for automotive applications. For 24V vehicle systems, use B2415 series with 18-36V or 9-36V input range. Consider additional filtering for severe noise environments in vehicles.
B1215S-2W is ideal for 12V vehicle systems. For 24V vehicles, use B24 series modules with appropriate input range.
What protection features does B1215S-2W have?
The B1215S-2W includes comprehensive protection features: 1) Input undervoltage protection: shuts down when input drops below 9V, protecting battery from over-discharge and preventing unstable operation; 2) Output short circuit protection: limits current and enters hiccup mode during short circuit, automatic recovery when fault removed; 3) Overcurrent protection: limits output current to protect module and load; 4) Overtemperature protection: reduces output power or shuts down if internal temperature exceeds safe limits; 5) Isolation barrier protection: 1500VDC isolation prevents fault propagation between input and output. These protections ensure reliable operation and prevent damage to the module, battery, and connected equipment.
Comprehensive protection including undervoltage, short circuit, overcurrent, and overtemperature ensures reliable battery-powered operation.