DS1862B+

Series:	--
Packaging:	Tray
Lead Free Status / RoHS Status:	--
Part Status:	Active
Moisture Sensitivity Level (MSL):	--
Type:	Laser Diode Controller (Fiber Optic)
Data Rate:	10Gbps
Number of Channels:	7
Voltage - Supply:	2.9 V ~ 5.5 V
Current - Supply:	3mA
Current - Modulation:	--
Operating Temperature:	-40°C ~ 100°C
Package / Case:	25-TFBGA, CSPBGA
Supplier Device Package:	25-BGA (5x5)
Mounting Type:	Surface Mount
Base Part Number:	DS1862

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Introduction

PMIC - Laser Drivers are devices that allow a current to be delivered to laser diodes in order to modulate their output. The DS1862B+ is a PMIC - Laser Driver designed to enable precise control of modulated current to most popular laser diode types. It is specifically designed to provide a high side and low side tail current capability, allowing it to be used in laser diode control applications. This article will discuss the applications and operating principles of the DS1862B+.

Description

The DS1862B+ is a compact, high-frequency, current-sourcing PMIC - Laser Drivers. It is a fourth-generation device with a wide input voltage range of 1.8V to 5.5V, making it well-suited for a variety of laser diodes and situations. In addition, the device features an easy-to-use interface over SPI that allows the user to set the current level and mode of operation, as well as a diagnostic input pin that can be used to alert the system of any potential problems.The device provides up to 8 A of current at frequencies ranging up to 8 MHz. It also features a variety of current modulation modes, including PWM, linear and logarithmic. It also features built-in fault monitoring and thermal protection. The device is designed to be a drop-in replacement for most prior Laser Drivers, making it perfect for upgrading existing systems.

Applications

The DS1862B+ is a great solution for applications where precise current control is required for laser diodes. It is ideally suited for laser diode modulation, optical tracking, and laser diode stabilization applications in consumer, automotive, datacenter and telecommunications environments. It is also suitable for use in manufacturing and medical equipment.Due to its wide supply voltage range and the ability to support tail current levels of up to 8 A, the device is also well-suited for high-powered applications such as fiber laser and medical laser applications. The device can also be used in industrial process control and metrology, where reliable and precise current control is required.

Working Principle

The working principle of the DS1862B+ is based on two transistors, an NPN and a PNP. These transistors are used to switch the laser diode between a high and a low current state. When high current is required, the NPN transistor is switched on, allowing current to flow from the supply voltage VDD to the output. When low current is required, the PNP transistor is switched on, allowing current to flow from the output to ground. Each transistor is turned on or off by a pulse-width-modulated (PWM) signal, meaning that the output current is determined by the duty cycle of this signal. The duty cycle is measured by a built-in oscillator and computed internally.The DS1862B+ also features a diagnostic input pin, which can be used to provide a warning in the case of any potential problems. Additionally, the device has built-in thermal protection, which can be used to protect against any potential thermal issues.

Conclusion

The DS1862B+ is a high-frequency current-sourcing PMIC - Laser Driver, designed specifically for precise laser diode control. It is a great solution for a wide range of applications, from consumer to industrial to medical. The device offers a wide input voltage range of 1.8V to 5.5V, and a maximum current output of 8 A with frequencies up to 8 MHz. It supports a variety of current modulation modes, and also includes a diagnostic input pin for system warnings and built-in thermal protection.

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