Security Power Supply Solutions

Reliable AC/DC and battery-backup power architectures for surveillance, access control and alarm systems, combining active PFC, isolated DC conversion, protected battery switchover and always-on system supervision.

Security power supply application

Managed AC/DC backup power for always-on security infrastructure

Security power supplies convert utility AC into regulated 12 V or 24 V DC rails for cameras, access controllers, alarm panels, locks and communication peripherals while maintaining a charged standby battery for backup operation. A practical architecture combines input conditioning, active PFC where required, an isolated high-voltage DC/DC primary stage, efficient secondary rectification, battery switching and a controller with comprehensive protection. The result is continuous power delivery during mains interruption, accurate battery management and dependable fault handling for mission-critical security systems.

Key advantages

  • Stable 12 V / 24 V regulated output
  • Battery-backed continuous operation
  • High input power factor
  • Low conversion loss
  • Fast switchover during mains failure
  • Controlled battery charging
  • Overcurrent and short-circuit protection
  • Low standby power
  • Wide AC input compatibility
  • Thermal and fault supervision
  • Telemetry and system-status readiness
  • Scalable channel and load capacity

Security power supply architecture and product mapping

Security Power Supply Architecture

AC input conditioning, active PFC, isolated HV DC/DC conversion, efficient secondary rectification, battery switchover and supervisory control for regulated 12 V / 24 V security rails.

Security Power Supply Solutions Editable two-to-one SVG block diagram for a security power supply. Interactive MOT-supported blocks are PFC, HV DC/DC Primary Power Stage, Synchronous and Rectifier, Battery Switching, and Controller and Protection. SECURITY POWER SUPPLY SOLUTIONS AC Input & EMI Filter PFC Power-factor correction HV DC/DC Primary Power Stage Isolated high-voltage conversion Synchronous & Rectifier Secondary rectification path Battery Switching Charge / switchover / ORing 12 V / 24 V DC Output Cameras · Locks · Alarm Panels Backup Battery Pack Controller & Protection Charging supervision · battery diagnostics · output protection · alarms BACKUP / CHARGE PATH Filled blocks: MOT supported device candidates Outline blocks: system-level functional blocks MOT Semiconductor Solutions
Tip: Select a block in the diagram or choose a module from the list. On mobile, swipe horizontally to view the full diagram.

Explore the security power architecture through an interactive block diagram. Select PFC, the HV DC/DC primary power stage, synchronous rectification, battery switching or the supervisory controller to review its design role, key engineering considerations and recommended MOT device categories.

About the solution

Isolated AC/DC conversion with backup battery continuity and supervised protection

Security power supplies normally convert utility AC into regulated low-voltage DC rails while float-charging a standby battery. When the mains fails or droops below threshold, the battery-switching path must maintain output continuity with minimal disturbance to cameras, locks, control panels and communication peripherals. The controller supervises PFC, primary conversion, secondary rectification, charge current, battery condition, output current, fault status and thermal behavior to deliver dependable always-on operation.

Designed for CCTV, access control, alarm panels and distributed security loads

The same building blocks can be scaled for compact indoor power modules, multi-output box power supplies and larger centralized backup units. Designers can adapt the solution for 12 V or 24 V rails, multiple camera channels, electric-lock power, intrusion alarms, intercom systems, fire and security accessories, remote I/O boxes and edge networking equipment that require regulated power and local battery backup.

Power semiconductors and supervisors aligned with the primary, secondary and backup paths

PFC MOSFETs and diodes, primary high-voltage switches, synchronous-rectifier MOSFETs, battery-path MOSFETs, ORing and protection devices, current- and voltage-sense circuits, digital or analog supervisory controllers, communication interfaces and auxiliary-power devices form a practical platform for robust, service-friendly security power designs.

Isolated AC/DC conversion with backup battery continuity and supervised protection

Security power supplies normally convert utility AC into regulated low-voltage DC rails while float-charging a standby battery. When the mains fails or droops below threshold, the battery-switching path must maintain output continuity with minimal disturbance to cameras, locks, control panels and communication peripherals. The controller supervises PFC, primary conversion, secondary rectification, charge current, battery condition, output current, fault status and thermal behavior to deliver dependable always-on operation.

Designed for CCTV, access control, alarm panels and distributed security loads

The same building blocks can be scaled for compact indoor power modules, multi-output box power supplies and larger centralized backup units. Designers can adapt the solution for 12 V or 24 V rails, multiple camera channels, electric-lock power, intrusion alarms, intercom systems, fire and security accessories, remote I/O boxes and edge networking equipment that require regulated power and local battery backup.

Power semiconductors and supervisors aligned with the primary, secondary and backup paths

PFC MOSFETs and diodes, primary high-voltage switches, synchronous-rectifier MOSFETs, battery-path MOSFETs, ORing and protection devices, current- and voltage-sense circuits, digital or analog supervisory controllers, communication interfaces and auxiliary-power devices form a practical platform for robust, service-friendly security power designs.

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Share your target application, electrical requirements, package preference and estimated quantity. Our field application engineers will follow up with the right battery-charging devices and reference designs for your project.

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  • NDA-protected review for early-stage projects
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