MAX8630YETD15+T

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Providing a solution to the ever-growing problem of efficiently and safely powering LEDs, the MAX8630YETD15+T application field and working principle of provides the platform needed to accompany any lighting design. It is a high efficiency buck LED driver that has a voltage input range of 4.2 V to 14 V and is capable of driving up to 15 stringed LEDs. It features low quiescent current and protects itself with an over-voltage lock-out, over-temperature and LED open/short circuit protection.

Specifications

• Input Supply Voltage Range: 4.2V to 14V
• Output Current (LEDs): Up to 15 strings of LEDs
• Control Voltage (VIN): 4.2V to 14V
• De-rating the output current at high temperature
• Constant LED Current Mode: Adjustable LED current with 25 mV LED current setting voltage
• PWM Dimming Mode: Adjustable LED current at high frequency input
• Protection features: Overvoltage Lockout (OVLO), Over-temperature Protection (OTP), and LED Open/Short Circuit Protection (OCP).

Application Field and Working Principle

The MAX8630YETD15+T devices can be used to provide constant current to drive LEDs in many automotive, general-purpose, and industrial lighting applications. Wide input voltage range from 4.2 V to 14 V and up to 15 strings of LEDs, up to 33.3V string voltage, enable diverse and extended applications for photo-metric design. Output current can be as low as 20mA per string. Its main feature is its high efficiency, up to 93% @ 12VIN and 10A output, same as average dimming with pulse-width modulation (PWM) technology.

MAX8630YETD15+T is designed primarily to drive LEDs with constant current. It uses a low voltage input signal to control LED current, PWM or analog input, or a Pot (potentiometer) signal to adjust current. By modulating the LED current, the driver can vary the LED intensity for range of dimming applications. The constant LED current architecture ensures uniform illumination, thus allowing for good color consistency. When the input voltage decreases to the over-voltage lock-out range, the IC will automatically shut down and not allow any current through the LEDs, thus preventing damage to the apparatus.

In addition, the device contains protection functions to guard against short circuit conditions, overheating, and over-voltage protection. It is designed within a small AEC-Q100 compliant 3 mm x 3 mm, 14-pin wettable flat package. All the features found on the MAX8630YETD13+T are fully protected and tested in accordance with the specification and are designed to meet EMC, relay/fuse, and safety requirements.

Conclusion

Overall, the MAX8630YETD15+T patented technology and design offers an efficient, cost-effective and reliable solution for driving LEDs in a range of applications. In summary, this device, with its small package size, wide input voltage range, and up to 33.3V per string voltage rating, is an ideal choice for lighting designs that require high-efficiency and low-quiescent current operation.

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