LP3918TL Texas Instruments In Stock
LP3918TL is a 4-channel LED driver and battery charger management IC by Texas Instruments. Key specs: up to 30 mA per LED channel, I2C control interface, and 4.2 V Li-Ion charge regulation. From $1.20, in stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- —
- Lifecycle
- ACTIVE
- Datasheet
- N/A
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of LP3918TL?
- 4-channel independently controlled LED driver with up to 30 mA per channel supports RGB plus white LED indicators in portable consumer devices
- Integrated I2C interface allows microcontroller-based brightness control and charge status readback without discrete logic components
- Combined LED driver and Li-Ion battery charger function in one IC reduces component count and board space in compact handheld designs
What is LP3918TL used for?
LP3918TL is designed for compact portable electronics such as smartphones, MP3 players, and handheld gaming devices that need simultaneous LED indicator control and Li-Ion battery charging from a single USB or adapter input. Its I2C-programmable 4-channel LED output and integrated charge management reduce system BOM and PCB area compared to using separate driver and charger ICs.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
What are equivalent replacements for LP3918TL?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How many LED channels does LP3918TL provide and what is the maximum current per channel?
LP3918TL provides 4 independently controllable LED output channels, each capable of sinking up to 30 mA. This allows individual brightness adjustment of red, green, blue, and white LEDs in a single device, covering notification, status, and backlight functions in portable consumer products.
What communication interface does LP3918TL use for brightness control and how does it simplify firmware integration?
LP3918TL uses an I2C interface for register-based LED brightness and charge control. A microcontroller can program all 4 channels with a single I2C write transaction using a standard 400 kHz Fast Mode bus, eliminating the need for PWM GPIO pins and reducing firmware complexity in multi-LED indicator designs.
Can LP3918TL charge a Li-Ion cell, and what is the regulated charge voltage?
Yes, LP3918TL integrates a Li-Ion battery charger that regulates the charge termination voltage to 4.2 V, which is the standard full-charge voltage for single-cell lithium-ion batteries. This eliminates the need for a separate charger IC in portable devices that already use LP3918TL for LED driving, saving roughly 10–15 mm² of board space.
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About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
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