MAX3646ETG+

Series:	--
Packaging:	Tube
Lead Free Status / RoHS Status:	--
Part Status:	Active
Moisture Sensitivity Level (MSL):	--
Type:	Laser Diode Driver (Fiber Optic)
Data Rate:	622Mbps
Number of Channels:	1
Voltage - Supply:	2.97 V ~ 3.63 V
Current - Supply:	47mA
Current - Modulation:	85mA
Current - Bias:	100mA
Operating Temperature:	-40°C ~ 85°C
Package / Case:	24-WFQFN Exposed Pad
Supplier Device Package:	24-TQFN (4x4)
Mounting Type:	Surface Mount
Base Part Number:	MAX3646

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The MAX3646ETG+ is a 4-channel, high-efficiency laser driver with both analog and pulse modulation capabilities. It is a state-of-the-art, low-noise driver, targeted at applications where laser power stability over a wide range of operating conditions is a critical requirement. This advanced platform combines several key features which provide superior performance and make it an ideal choice for a variety of application fields.

Features:

• High-Efficiency:The MAX3646ETG+ is designed for high-efficiency operation and can provide up to 80% efficiency under normal conditions.
• Low-Noise:The low noise operation of the MAX3646ETG+ contributes to long term stability in laser power delivery and helps ensure laser stability even in noisy environments.
• High Linearity:The MAX3646ETG+ offers high linearity performance and maintains excellent power regulation.
• Wide Operating Range:The MAX3646ETG+ supports a wide range of input voltages and can operate in different temperature ranges.
• Small Package Size:The MAX3646ETG+ is housed in a small, 28-lead QFN package, allowing for easy integration with other system components.

Applications:

The MAX3646ETG+ is suitable for a wide range of applications that require high-efficiency, low-noise drivers. It is specifically designed for laser drivers in laser cinema projectors, laser measurement systems, medical imaging systems, fiber-optic communications and other industrial applications. It can also be used in a range of other applications, such as optical scanning, barcode readers, and optical sorting systems.

Working Principle:

At the heart of the MAX3646ETG+ is a high-efficiency power control circuit which regulates the output current of the laser driver. The input voltage is converted into an output current by the control circuitry, with the maximum current set by a user-adjustable reference voltage. The device then uses an on-chip amplifier and a sophisticated PWM algorithm to maintain the laser current within tight limits over the full range of operating conditions. In order to avoid high frequency noise from the laser, the control circuit is designed with low bandwidth. The MAX3646ETG+ also features a built-in temperature sensor which can be used to improve power control accuracy over temperature. The device is also equipped with a high-speed current monitor which allows it to accurately detect and compensate for changes in laser current. The MAX3646ETG+ has a very low quiescent current, so it can operate in a wide range of conditions with minimal power consumption. It also incorporates an advanced thermal management system which enables efficient operation even under very high ambient temperatures, further reducing power consumption.

Conclusion:

The MAX3646ETG+ is an advanced, low-noise laser driver which is an ideal choice for applications requiring high-efficiency and a wide range of operating conditions. It offers high linearity performance and excellent power regulation, as well as low power consumption, making it well-suited for a variety of laser driver applications.

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