The CA-1239 (also known as GLC-1239) Adjustable Buck Converter is a high-efficiency, miniature power management module designed for precision voltage regulation. At Electrapac, we highly recommend this module for electronics repair technicians in Bangladesh, specifically for fixing LCD/LED TV motherboards and various digital PCB circuits where multiple stable low-voltage rails are required.

Product Overview

The CA-1239 is built around the MP1495 High-Frequency Synchronous Rectifier chip, which allows it to reach an impressive power efficiency of over 90%. Unlike older converters that use bulky potentiometers which can drift over time, this module uses solder-bridge selection points to set the output voltage. This "set-and-forget" method ensures the voltage remains rock-solid, protecting sensitive ICs from accidental overvoltage. 

Key Features for Electrapac Customers

• Ultra-Miniature Form Factor: Small enough to be taped or glued onto an existing motherboard where the original voltage regulator has failed.

• Synchronous Rectification: Generates significantly less heat than traditional linear regulators, allowing for a compact design without a massive heat sink.

• Stable Solder-Point Adjustment: Eliminates the risk of a potentiometer being accidentally turned or vibrating out of place, which is vital for long-term device reliability.

• Wide Compatibility: Perfect for generating "Core Voltages" (0.9V, 1V, 1.2V) required by modern processors and SOCs in smart TVs and monitors.

• Low Ripple Output: Provides clean, stable power that won't interfere with sensitive audio or video signals on the PCB.

How to Adjust the Output Voltage

Setting the correct voltage on the Electrapac CA-1239 is easy and secure:

1. Identify Your Target: Look at the back of the PCB where the voltage labels (1.5V, 1.8V, etc.) are printed next to pairs of small silver pads.

2. Solder the Bridge: Use a small amount of solder to connect the two pads corresponding to your desired voltage. Only solder ONE pair at a time.

3. Default State: If no pads are soldered, the module will output its default minimum voltage (typically 1.25V).

4. Connect Power: * IN+ / IN-: Connect your 5V–15V input source.

   • OUT+ / OUT-: Connect to your target circuit.

   • EN (Optional): Connect to a logic high signal to turn the module ON, or leave it if you want it always active.

Pro-Tip: Always measure the output with a multimeter before connecting it to your target device to ensure you have bridged the correct solder pads.

Primary Applications

• LCD/LED TV Repair: Replacing failed 1.2V, 1.8V, or 3.3V regulators on mainboards.

• Embedded Systems: Providing stable power to ESP32 or Raspberry Pi projects from a 12V battery source.

• Automotive Electronics: Stepping down 12V car power to 5V for dashcams or sensors.

• Router & Networking Gear: Reviving bricked routers that have damaged internal power stages.

• DIY Prototyping: A versatile "Swiss Army Knife" power module for any electronics workbench.

Why Shop at Electrapac?

We source our CA-1239 / GLC-1239 Modules with high-quality MP1495 chips and durable inductors to ensure they can handle the full 3A load without dropping voltage. Visit us at www.electrapac.com for the professional-grade repair components that save you time and money.