LMH6526SP/NOPB

Overview

The LMH6526SP/NOPB is a four-channel laser diode driver with dual outputs, designed for DVD/CD recordable and rewritable systems. It operates on a 4.5V to 5.5V supply voltage within a -40°C to 85°C temperature range. The device features two high-current outputs for reading and writing DVD (650 nm) and CD (780 nm) lasers. Channel currents are summed at the selected output to generate multi-level waveforms. It includes a 150 mA read channel, one 300 mA write channel, and two 150 mA write channels, allowing a total output current of 600 mA or greater. The package is a 28-UQFN.

Feature Summary

• Provides four independent switched current channels for precise laser control.
• Integrates an on-board High-Frequency Modulator oscillator to reduce low-frequency noise.
• Utilizes an LVDS interface to deliver high-speed data rates while minimizing crosstalk.
• Supports fully differential oscillator circuits to minimize supply line noise.

Applications

• DVD recordable and rewritable optical disc systems
• CD recordable and rewritable optical disc systems
• Laser diode drivers for 650 nm wavelengths
• Laser diode drivers for 780 nm wavelengths

Procurement Notes

Verify that the specific part number matches the required datasheet revision, as Texas Instruments may update documentation over time. Confirm that the 28-UQFN package dimensions align with your PCB footprint requirements. Ensure that the operating voltage range of 4.5V to 5.5V is compatible with your system's power supply design. Check for any specific environmental certifications such as RoHS compliance if required by your manufacturing standards.

Selection Notes

Select this component when designing systems requiring simultaneous control of multiple laser diodes for both reading and writing operations. Consider the LMH6526SP/NOPB for applications needing high peak currents up to 600 mA through summed channels. Evaluate the LVDS interface compatibility if high-speed data transmission is critical. Compare against the LMH6525 variant if the internal oscillator configuration differs from your specific noise reduction needs.

Part Context

The LMH6526SP/NOPB belongs to the LMH™ series of high-performance analog components from Texas Instruments. It is functionally related to the LMH6525, sharing similar architecture but differing in oscillator enablement methods. This family is optimized for speed and power consumption in next-generation optical storage systems. The device addresses the demand for precise current control in multi-wavelength laser applications.

Replacement Considerations

The LMH6525SP/NOPB is a closely related part within the same family. Verify if the oscillator enable pin configuration differences between the LMH6525 and LMH6526 impact your circuit design before substitution. Other variants like LMH6526SPX/NOPB may exist; confirm package and thermal characteristics match your requirements.