The Motorola TPN1136A is a desktop DC power supply unit engineered as a base station power source for low-power Motorola radio equipment. It converts 121 VAC, 60 Hz mains input to regulated DC outputs, delivering approximately 14.3 VDC nominal at the primary J4 connector with continuous current capability of 7.5 A under standard fusing conditions. The unit employs a bridge rectifier topology, TLN52748 regulator board, and dual M9244 pass transistors in parallel configuration to manage thermal loads across its output stage. Construction emphasizes durability and compact form factor suitable for portable deployment.
Technical Specifications
• Input: 121 VAC, 60 Hz
• AC Mains Fuse: 2 A SLO-BLOW
• Primary Output Voltage: 14.3 VDC nominal (14.2 VDC alternate specification)
• Continuous Current Rating: 7.5 A (at 2 A fuse rating); design supports >17 A with increased AC mains fuse
• Peak Current Capability: 16.7 A maximum (limited by 7 W emitter ballast resistor rating)
• Filter Capacitance: 11,000 µF (early revision) or 10,000 µF (later revision)
• Secondary DC Outputs: +21 V, +15.2 V, +14.5 V, +12.9 V, +12.3 V, +7.3 V (regulated)
– Key Features
• Dual-transistor pass stage (M9244) with emitter ballast resistors for load distribution
• Multi-stage voltage regulation with 6.8 V reference (VR1) and M9642/M9170 driver transistors
• Bridge rectifier AC-to-DC conversion with 120 VAC transformer
• Remote ON-OFF switching capability via GRN/ORG terminal pair
• Compact travel-oriented chassis design
– Typical Applications
• Base station power for MCX-100 and Maxar low-power radio platforms
• Moxy radio system support
– Compatibility & Integration
Design topology shared with TPN1144A, TPN1154A, and VPN1013A models. Primary regulated output accessed via J4 connector; AC input via P1 main connector.
