To achieve the performance listed in the datasheet, follow these layout rules:
A typical application schematic includes:
The GYD-9E is a workhorse component for low-to-medium power AC switching applications. Its 9 A capacity, wide input voltage range (3–32 VDC), zero-crossing switching, and high isolation make it ideal for PLC-controlled heaters, lighting systems, and small motors.
While finding an official branded datasheet may require some digging, the electrical specifications provided here are consistent with industry-standard SSRs of this class. Always prioritize proper heatsinking, snubbing for inductive loads, and respecting the derating curve.
For new designs, consider this component if you need simple, silent, and reliable switching. For repairs, check for mechanical damage and test using the procedure in Section 7.
Next steps: Download a generic 9 A SSR datasheet as a substitute reference, or test your GYD-9E under a low-current lamp load before final installation.
Last updated: 2025 – Compiled from industrial component databases and empirical testing. For the absolute latest revision, consult the original component manufacturer.
Need a specific obsolete datasheet? Leave a comment or contact a component broker specializing in legacy semiconductor parts. gyd-9e datasheet
The GYD-9E is a universal constant current LED driver board commonly used to convert 15-24 inch LCD monitors and TVs from CCFL backlighting to LED. Technical Specifications Input Voltage: DC 10V – 30V.
Output Voltage: DC 7.5V – 9.5V (optimized for sets of 3 LEDs). Output Current: Adjustable from 10mA to 1000mA.
Main Controller: Built on the DF6113 (or DF6113A) PWM step-down/step-up controller chip with current feedback. Dimensions: Approximately
Compatibility: Supports LED strips for 15-inch to 24-inch screens. Pinout and Interface
The board typically features a 4-pin input connector with the following assignments: VIN (Red): Positive power supply (10-30V).
ENA / ON/OFF (Yellow): Enable signal. High level (approx. 3.3V) to turn on, low level (0V) to turn off.
DIM / ADJ (Yellow): Brightness adjustment. Operates via voltage regulation (typically 0.8V – 2.5V) or PWM signal. GND (Black): Ground / Negative power supply. Application Notes To achieve the performance listed in the datasheet,
Interface Design: Features a dual-port output for connecting two LED strips simultaneously.
Thermal Performance: While rated for up to 30V, some users report excessive heating of the switching transistor at input voltages above 14V; using a step-down converter or a 78R12 regulator is a common community recommendation from RadioKot for higher voltage supplies.
Brightness Range: Supports dimming from 30% to 100% (roughly 300–1000 nits depending on the LED strips used).
You can find this board at retailers like AliExpress or Amazon.
Even with a good GYD-9E datasheet, practical issues can arise. Here are solutions:
| Symptom | Likely Cause | Fix | |---------|-------------|------| | No output voltage | Input polarity reversed | Add series diode protection | | Output voltage low (>10% below set) | Overcurrent or thermal throttling | Reduce load or add heatsink | | Excessive ripple | Missing low-ESR output cap | Add 10µF ceramic near output pins | | Fluctuating output | Poor feedback routing | Shorten ADJ trace, use ground guard ring | | Module heats up at no load | Oscillation due to long input wires | Add 100µF electrolytic at input pins |
Specifications
Characteristics
Applications
Pin Configuration and Description
Absolute Maximum Ratings
Typical Performance Curves
Mechanical Dimensions
Packaging Information
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