ChipApex | Global Electronic Components Supplier
SEARCH
Search Product
Search Post
— IC芯片 | 连接器 | 传感器 | 被动器件 —
Consult the customer manager about the wholesale price.
consultation hotline：86-132-6715-2157
email：[email protected]
Contact the product manager for consultation. One-stop consultation is available.
Do you want a lower wholesale price? Please send us your inquiry and we will reply immediately.
Product Detailed Parameters
- Description：IC LED DRIVER RGLTR DIM 24WQFN
- Series：-
- Mfr：Texas Instruments
- Package：Tape & Reel (TR),Cut Tape (CT)
- Type：DC DC Regulator
- Topology：Switched Capacitor (Charge Pump)
- Internal Switch(s)：Yes
- Number of Outputs：7
- Voltage - Supply (Min)：2.7V
- Voltage - Supply (Max)：5.5V
- Voltage - Output：2V ~ 4V
- Current - Output / Channel：30mA, 80mA
- Frequency：700kHz
- Dimming：I2C
- Applications：Backlight
- Operating Temperature：-30°C ~ 85°C (TA)
- Mounting Type：Surface Mount
- Package / Case：24-WFQFN Exposed Pad
- Supplier Device Package：24-WQFN (4x4)
- Grade：-
- Qualification：-
Download product information
Overview
The LM27964SQ-I/NOPB is a white LED driver system from Texas Instruments featuring seven outputs. It utilizes a buck topology with an input voltage range of 2.7 V to 5.5 V and supports an output current of 180 mA per channel. The device operates at frequencies between 500 kHz and 900 kHz, providing regulated constant current for LED strings. It includes I2C-compatible brightness control and is housed in a 24-WQFN package. The component functions within a temperature range of -30°C to +85°C.
Feature Summary
- Integrates seven independent constant-current channels for multi-string LED applications
- Supports I2C-compatible digital interface for brightness control and configuration
- Employs buck topology to regulate LED current efficiently
Applications
- White LED backlighting systems
- Multi-zone LED lighting arrays
- Industrial LED illumination modules
Procurement Notes
Verify the specific suffix 'I' indicates industrial temperature rating (-30°C to +85°C). Confirm the 'NOPB' designation ensures lead-free and RoHS compliance. Cross-reference the datasheet revision date against your design requirements. Ensure the 24-WQFN footprint matches your PCB layout constraints. Validate that the buck topology aligns with your input voltage and LED string voltage headroom needs.
Selection Notes
Select this component when designing systems requiring seven independently controlled LED channels. The buck topology is suitable for applications where the input voltage exceeds the total forward voltage of the LED strings. The I2C interface allows for precise digital dimming without additional GPIO usage. Consider the 180 mA output capability relative to the target LED specifications. The industrial temperature range makes it appropriate for demanding environmental conditions.
Part Context
This part belongs to the LM27964 series of LED drivers. It shares functional similarities with other members like the LM27966 but differs in topology and channel count. The LM27964 uses a buck converter, whereas variants like the LM27966 utilize charge pump architectures. This distinction affects efficiency and input-output voltage relationships in the final design.
Replacement Considerations
The LM27964SQ-A/NOPB is a documented direct replacement for the LM27964SQ-A variant. Verify pinout compatibility and electrical parameters before substitution. Ensure the replacement part meets the same industrial temperature and RoHS requirements.
