LM10503SQE/NOPB

Series:	PowerWise®
Packaging:	Tape & Reel (TR)
Part Status:	Obsolete
Applications:	Energy Management Unit (EMU)
Current - Supply:	--
Voltage - Supply:	3 V ~ 5.5 V
Operating Temperature:	-40°C ~ 70°C
Mounting Type:	Surface Mount
Package / Case:	36-WFQFN Exposed Pad
Supplier Device Package:	36-WQFN (6x6)
Base Part Number:	LM10503

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The LM10503SQE/NOPB is a type of Power Management IC, also known as PMIC, designed for special application fields. It is a part of the Texas Instruments’ portfolio of high performance Battery Charge Management ICs, designed to charge and protect Lithium-Ion battery packs. The IC enables power to be drawn from multiple sources and delivers it to multiple loads, providing a wide range of useful benefits. In this article, the application field and working principle of the LM10503SQE/NOPB will be discussed.

Application Field

The LM10503SQE/NOPB is suitable for a variety of applications, particularly for Wearable and Portable Electronics, Energy Storage, and OEM Applications. It is designed to be used in low current applications, specifically with batteries that have a capacity of 600 mAh or less. It is especially suitable for wearables and portable electronics, in which size and weight are critical factors.

Features and Performance

The LM10503SQE/NOPB offers outstanding features and performance, including a wide input voltage range of 2.6V to 19V, adjustable outputs, programmable protection circuit, and a very small total solution size. It has a very low quiescent current of 0.3 μA, and also features an active clamp circuit to increase the switch current limit. The IC supports single cell, dual cells, and multi-cells battery packs with up to 500mA max current and 37V max voltage. It also has internal input current limit and output over voltage protection.

Working Principle

The LM10503SQE/NOPB is a synchronous buck-boost charger, which means it is able to both step-up and step-down voltages as required. This makes it a versatile power management IC, suitable for a variety of applications. The IC has an input power connector, which allows it to draw power from either a USB or DC adapter. It is connected to the battery, and to the load, and is able to route power from either source to either destination. It works by first checking the battery voltage, and then it switches to the appropriate buck or boost path to ensure that the load voltage remains at the ideal level. The IC also monitors the input current, and if it exceeds a limit as set by the current limit pin, the IC will reduce the input current. This ensures that the battery pack is not over charged and protected from damage.

Conclusion

The LM10503SQE/NOPB is a versatile Power Management IC, suitable for applications such as Wearable and Portable Electronics, Energy Storage, and OEM Applications. it offers a wide input voltage range of 2.6V to 19V, adjustable outputs, programmable protection circuit, and a very small total solution size. The IC is able to both step-up and step-down voltages, and is capable of monitoring both the input and output current. It is a reliable and versatile Power Management IC, and is sure to provide excellent performance in a variety of applications.

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