MAX6977APE+

Voltage - Output:	5.5V
Base Part Number:	MAX6977
Supplier Device Package:	16-PDIP
Package / Case:	16-DIP (0.300", 7.62mm)
Mounting Type:	Through Hole
Operating Temperature:	-40°C ~ 125°C (TA)
Applications:	Lighting, Signage
Dimming:	--
Frequency:	--
Current - Output / Channel:	55mA
Series:	--
Voltage - Supply (Max):	5.5V
Voltage - Supply (Min):	3V
Number of Outputs:	8
Internal Switch(s):	Yes
Topology:	Shift Register
Type:	Linear
Part Status:	Active
Packaging:	Tube

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Introduction

Maxim Integrated\'s MAX6977APE+ is a highly-integrated, low-cost, low-power, and high-efficiency LED driver for mobile applications. It is based on Maxim\'s D-CAP2™ continuous-conduction mode (CCM) with self-oscillating peak current-mode (PCM) control architecture. The MAX6977APE+ provides several benefits including: adjustable output current, single pulse current control, maximum peak currentvalue, low operating power, and a wide operating temperature range. MAX6977APE+ is well-suited for applications that require extremely fast dynamic response, including light sources such as incandescent, fluorescent, and halogen bulbs.

Application Field

The MAX6977APE+ is designed specifically for mobile applications such as cellular phones, PDAs, and mobile gaming consoles. This LED driver is perfect for mobile applications that are characterized by limited amounts of power and limited space. The MAX6977APE+ is well-suited for space-constrained environments such as backlight unit (BLU) modules, keyboards, and touchpad backlighting. It is also used in display backlighting and general illumination applications.

Features and Benefits

The MAX6977APE+ offers several features to help protect the LED from damage due to current overshoots. It also ensures that the LED operates within its maximum-rated junction temperature for optimal lifetime. Additionally, the MAX6977APE+ offers several benefits, including adaptive current control that helps reduce the inrush current and protect the host device from overcurrent. The MAX6977APE+ also offers various programmable features such as adjustable output current and maximum peak current, low operating power, and a wide operating temperature range.

Working Principle

The MAX6977APE+ LED driver is based on the Maxim\'s D-CAP2™ continuous-conduction mode (CCM) with self-oscillating peak current-mode (PCM) control architecture. This architecture is designed to provide efficient and accurate control of the LED current. The architecture consists of an error amplifier and an integrated power MOSFET. The error amplifier compares the voltage of the output current sense resistor to a reference voltage. The resulting error signal is used to control the output current in both CCM and PCM operation modes. The maximum peak current can be programmed using an external current-sense resistor.

Conclusion

The MAX6977APE+ is a highly integrated, low-cost, low-power, and high-efficiency LED driver for mobile applications. It offers several benefits such as adjustable output current, single pulse current control, maximum peak current value, low operating power, and a wide operating temperature range. The MAX6977APE+ is based on Maxim\'s D-CAP2™ continuous-conduction mode (CCM) with self-oscillating peak current-mode (PCM) control architecture and is suitable for a wide range of mobile applications.

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