Product Introduction: MAX8596XETA+ - High-Efficiency LED Driver

Analog Technologies Proudly Presents: MAX8596XETA+

In the realm of handheld devices, the efficiency and performance of LED backlighting are paramount. The MAX8596XETA+ is a high-efficiency, 36V step-up converter designed to drive 2 to 9 series-connected white LEDs, widely used for LCD backlighting in devices such as mobile phones, PDAs, e-books, and subnotebooks. This driver offers an unparalleled lighting experience with its exceptional performance and compact size.

Core Features:

• High Efficiency Design: The MAX8596XETA+ offers up to 86% efficiency (PLEDs/PIN), significantly reducing power consumption and extending device uptime.
• Temperature Derating Function: A unique ambient temperature derating function prevents overdriving white LEDs in high-temperature environments, ensuring stable operation across varying temperatures.
• Precise Current Regulation: With 1.7% current regulation accuracy, ensuring consistent and uniform LED brightness.
• Output Overvoltage Protection: Designed with output overvoltage protection to safeguard LEDs from damage due to excessive voltage.
• Flexible Dimming Control: Supports analog direct-PWM dimming, providing brightness control from subtle adjustments to full brightness.
• Fast Switching Frequency: A 1MHz PWM switching frequency allows for small input and output capacitors and a small inductor while minimizing input supply/battery ripple.
• Soft-Start Function: The soft-start function eliminates inrush current during startup, protecting circuits from damage.
• Wide Input Voltage Range: A 2.6V to 6V input range adapts to various power environments.
• Ultra-Low Shutdown Current: The shutdown current consumption is only 0.3µA, consuming virtually no additional power.
• Packaging Advantages: Features a 3mm x 3mm x 0.8mm TDFN package with an exposed paddle for effective heat dissipation and space savings.

Application Scenarios:

• Mobile and smartphones
• PDAs, palmtops, and wireless handhelds
• E-books and subnotebooks
• White LED display backlighting

Frequently Asked Questions (FAQs):

Q: What is the dimming range of the MAX8596XETA+?

A: The MAX8596XETA+ supports PWM dimming from 200Hz to 200kHz, allowing for brightness control from very low to full brightness by adjusting the PWM duty cycle.

Q: What is the input voltage range of this driver?

A: The input voltage range of the MAX8596XETA+ is 2.6V to 6V, making it suitable for a variety of power environments.

Q: How is the soft-start function of the MAX8596XETA+ implemented?

A: The soft-start function is achieved by gradually charging the CCOMP capacitor, avoiding inrush current during startup and protecting LEDs and circuits.

Q: Does the MAX8596XETA+ support PWM dimming?

A: Yes, the MAX8596XETA+ supports PWM dimming, allowing users to control LED brightness by changing the duty cycle of the PWM signal.

Q: What is the efficiency of this driver?

A: The efficiency of the MAX8596XETA+ is up to 86%, meaning it has very low power loss during energy conversion, which helps extend the service life of devices.

Q: How does the overvoltage protection of the MAX8596XETA+ work?

A: Overvoltage lockout (OVLO) occurs when the output voltage exceeds 38V. The protection circuitry stops the internal MOSFET from switching and allows VCOMP to decay towards 0V. The device comes out of OVLO and into soft-start when the output voltage falls below 36V.