YX8018 is a high-performance solar lawn lamp boost control chip, which is suitable for a solar lawn lamp powered by a 1.2V rechargeable battery in series.The main functions include charging control, boost drive, optical control, etc. This product has Solar LED driver functions. The manufacturers of this product is Shiningic.
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Description
The solar lawn lamp mainly uses the energy of the solar cell to work. When the sunlight shines on the solar cell during the day, the light energy is transformed into electric energy and stored in the battery, and then the battery provides power for the LED (light emitting diode) of the lawn lamp at night.It has the advantages of safety, energy saving, convenience and environmental protection.It is applicable to solar products powered by one 1.2V rechargeable battery.
The YX8018 is the two 1.25V charge current or one Lights in a stable manner LED in the pond. Light of the sun Saw And to charge the rechargeable battery and a battery hit the error, The point the LED in the charging battery is charged to at night Light, automatic switching.
It is a switch-mode power supply (SMPS) designed for LED lighting systems and can operate with a wide input voltage range, making it suitable for various applications.
This has an automatic day/night detection feature. It turns off the LED during daylight when the solar panel is generating sufficient voltage, and turns on the LED at night when the solar panel voltage drops.
It includes an internal oscillator that switches an external inductor to boost the voltage from the battery to a level sufficient to power an LED. This is crucial because the voltage from a single-cell battery (usually around 1.2V) is insufficient to directly drive an LED, which typically requires around 3V.
The IC is designed to operate with very low quiescent current, maximizing the efficiency and battery life. This is important for solar garden lights which need to operate over long periods without frequent battery replacement.
Features
1. High efficiency: 80 to 90%
2. Minor peripheral components: only one inductor
3. Low voltage battery protection function
4. Inductor adjust current
5. Boost, light control, charging, solar cells and rechargeable batteries being connected in common.
6. Operating frequency: 200-340KHz
7. Electric current: 40 mA
Pinout
1. Lx : switch drain
2. GND : GND
3. CE : Negative electrode of solar battery, EN control / charge control
4. VDD : Solar cell positive electrode
Application Circuits
YX8018 Pinout
When it gets dark the LEDs turn on and the solar panel can no longer charge the battery, so there has to be some kind of control circuitry inside it to do this.
This control circuit consists of a YX8018, a small PCB with a single 1.25V 100mAh AAA NiCd cell and an LED, and a 220uH inductor.
The YX8018 is a gated oscillator running at approximately 200 KHz that drives an open-drain NMOS switch (output on pin 1). The 3cm x 3cm size in this example produced 2.7V in full sunlight with a short-circuit current of 17mA.
YX801 application circuit
Applications
1. Solar lawn light
2. Solar lamp string
3. LED drive
4. Landscape decorative lamp string
5. Interior decoration lamp string
Download YX8018 Datasheet
- YX8018 led controller ( english version )
- YX8018 PDF
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