The AT8860 is a highly efficient step-down constant current driver IC designed for high-power LED applications. It offers an excellent cost-effective solution for MR16 LED lamp cups, stage lighting, automotive LED systems, solar-powered LED lights, and street lighting. With its wide input voltage range of 5V to 40V, the AT8860 can easily adapt to various power supply conditions. The output current is adjustable via an external resistor, allowing for precise control with a maximum single LED current of up to 1000mA. Its ±3% current accuracy ensures consistent brightness across all LEDs.
The chip supports both analog dimming (0.5–2.5V) and PWM dimming through the ADJ pin, providing flexible control options. When the DIM pin voltage drops below 0.3V, the internal power switch turns off, putting the device into a low-power standby mode. This feature helps reduce power consumption in idle states. Additionally, the AT8860 includes built-in over-temperature protection, LED short-circuit protection, and open-circuit detection, ensuring reliable performance in harsh environments.
The AT8860 is available in multiple package types, including SOT89-5, ESOP8, and SOP8, making it suitable for a wide range of applications. Its compact design and minimal external component requirements make it ideal for space-constrained designs. The chip also features a high efficiency of up to 95%, which helps reduce energy loss and improve overall system performance.
Key specifications include:
- **Input Voltage Range:** 5V – 40V
- **Maximum Output Current:** 1A
- **Current Accuracy:** ±3%
- **Dimming Options:** Analog (0.5–2.5V) & PWM
- **Protection Features:** Over-temperature, Short Circuit, Open Circuit
- **Operating Temperature:** -40°C to +125°C
- **Package Options:** SOT89-5, SOP8
The AT8860 is widely used in applications such as MR16/11 LED spotlights replacing traditional halogen lamps, automotive lighting systems, stage lighting, solar LED installations, signal lights, and street lighting. Its versatility, reliability, and efficiency make it a popular choice for designers looking for a robust and cost-effective LED driver solution.
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Wenzhou Hesheng Electronic Co., Ltd. , https://www.heshengelec.com