← All Solutions

IPH2331 — Battery-Free NFC Padlock PCBA

PCBA DESIGN · OEM / ODM

IPH2331 is a battery-free NFC lock controller for passive padlocks, luggage locks and storage lockers. A main control board and NFC sensing board harvest energy from a compatible phone’s 13.56 MHz NFC field, combining authorization and bidirectional motor control. Antenna tuning and lock mechanism integration require validation in the complete product.

13.56 MHz | Battery-Free | Motor Control

Request a Quote

Product Overview

IPH2331 main control board and NFC sensing board

The IPH2331 is a complete battery-free smart padlock PCBA solution consisting of a main control board and an NFC sensing board. A compatible smartphone supplies energy through its 13.56 MHz NFC field, so the lock electronics can authenticate a command and drive the geared motor without a battery inside the lock.

The platform combines NFC energy harvesting, regulated power, bidirectional data exchange, secure authorization, energy storage, and forward/reverse motor control. It is designed for OEM/ODM development of padlocks, luggage locks, lockers, storage cabinets, and other compact electronic-lock products.

Battery-FreeHarvests operating energy from a compatible phone's NFC field.
13.56 MHz NFCBidirectional communication compatible with ISO/IEC 14443A.
Secure AccessDevice UID verification plus a 64-bit rolling-code authorization scheme.
<3 s TargetFast unlock target under suitable antenna coupling and system conditions.
Dual-Board PCBAMain control board and dedicated communication/energy-harvesting board.
Custom AppAndroid, iOS, and HarmonyOS project support with multilingual UI options.
↓Chinese Manual ↓English Manual ✉Request OEM/ODM Support

Technical Specifications

ParameterSpecification
ModelIPH2331
Product TypeNFC Passive Padlock PCBA
PCBA ArchitectureMain control board + NFC sensing board
Operating Frequency13.56 MHz
NFC ProtocolISO/IEC 14443A compatible
Power SourceSmartphone NFC reverse powering; no lock-side battery required
Energy Storage2 × 1000 µF / 16 V capacitors
Motor OutputBidirectional drive for 1.5–4.5 V geared motors
Unlock Performance<3 seconds target under suitable system and coupling conditions
SecurityDevice UID + 64-bit rolling code + synchronization counter
PCB Build1.0 mm thickness, 1 oz copper
Prototype Peak Current217 mA measured; 250 mA design upper limit
App Platform SupportAndroid / iOS / HarmonyOS project support

Customization & Integration

Project services include antenna tuning, motor and mechanism adaptation, firmware parameters, app branding, connectors and PCB layout adaptation. Final performance depends on complete-product validation.

How It Works

Place a compatible NFC phone near the sensing face. The sensing board harvests RF energy, rectifies it, and charges the onboard storage capacitors. After the power rail is ready, the phone and PCBA exchange authentication data. An approved command drives the motor forward to unlock or in reverse to reset the mechanism.

IPH2331 NFC energy, data, authentication, and motor control block diagram

Energy harvesting, secure communication, and motor-control architecture

PCBA Gallery

IPH2331 main control board front

Main Control Board — Front

IPH2331 main control board back

Main Control Board — Back

IPH2331 NFC sensing board front

NFC Sensing Board — Front

IPH2331 NFC sensing board back

NFC Sensing Board — Back

Function Demo

App Functions

IPH2331 English app device list
IPH2331 English app controls
  • Bind and unbind a padlock using its unique device identity
  • Unlock and lock/reset commands with UID verification
  • Rename devices for easier fleet or household management
  • Review operation records
  • Chinese, English, and additional language customization
  • Custom logo, color system, UI, and workflow available for OEM/ODM projects

Applications

  • Consumer Padlocks: Battery-free access for home, gate, toolbox, and general security products
  • Luggage & Bag Locks: Compact designs that eliminate battery maintenance
  • Lockers & Cabinets: NFC-enabled storage, rental, and shared-access systems
  • Electronic-Lock Platforms: A PCBA foundation for customized lock mechanics and housings

Integration & OEM/ODM

Mechanical and antenna co-design matter. The final sensing position, antenna matching, motor load, and energy thresholds must be validated in the assembled lock. Avoid metal, magnetic materials, and closed conductive loops near the NFC sensing face; phone cases and accessories can also affect coupling distance and unlock time.

Available project services include antenna tuning, motor and mechanism adaptation, firmware parameters, mobile-app branding, multilingual UI, connector definition, PCB layout adaptation, pilot builds, and mass-production validation.

Performance figures are development targets or prototype measurements from the V1.4 product documentation. Final specifications are subject to the approved hardware, lock mechanism, phone compatibility, and complete-product validation.

LET’S BUILD THE RIGHT SOLUTION

Tell us what
you’re working on.

Have a platform in mind or an application to discuss? Share a few details to start a technical conversation.

Phone · +86 138 2963 2935 WhatsApp · +86 150 1976 2721
WeChat QR code
Connect on WeChatScan for product information

Shantou, Guangdong, China · UTC+8

Opens WhatsApp with your inquiry ready to review and send. You can also contact us by phone or WeChat.

INTERPOWER · PCBA Solutions
Contents
×
请联系我司商务获取硬件资料
👤
商务联系人
Vivi
📱
Phone
+86 138 2963 2935
💬
WhatsApp
+86 150 1976 2721
微信扫码添加好友
WeChat QR Code