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Product Detailed Parameters
- Description：IC LED DRV RGLTR PWM 25MA 12WQFN
- Series：-
- Mfr：Richtek USA Inc.
- Package：Tape & Reel (TR)
- Type：DC DC Regulator
- Topology：Switched Capacitor (Charge Pump)
- Internal Switch(s)：Yes
- Number of Outputs：4
- Voltage - Supply (Min)：2.8V
- Voltage - Supply (Max)：4.5V
- Voltage - Output：-
- Current - Output / Channel：25mA
- Frequency：1MHz
- Dimming：PWM
- Applications：Backlight
- Operating Temperature：-40°C ~ 85°C (TA)
- Mounting Type：Surface Mount
- Package / Case：12-WFQFN Exposed Pad
- Supplier Device Package：12-WQFN (2x2)
- Grade：-
- Qualification：-
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Overview
The RT9378BGQW is an LED driver IC manufactured by Richtek USA Inc., designed for backlight applications. It integrates a DC-DC switching regulator with a switched-capacitor (charge pump) topology and supports PWM dimming. The device provides four output channels, each capable of delivering up to 25mA. It operates within a supply voltage range of 2.8V to 4.5V and functions reliably across a temperature range of -40°C to +85°C. The component is housed in a compact 12-WQFN package measuring 2x2 mm.
Feature Summary
- Integrates a charge pump topology for efficient voltage boosting without requiring external inductors
- Supports high-resolution PWM dimming control for precise brightness adjustment
- Features internal switches to minimize external component count and board space
Applications
- LCD backlight drivers for portable devices
- Small display modules requiring regulated current sources
- Battery-powered consumer electronics with limited PCB area
Procurement Notes
Verify the specific suffix BGQW to confirm the package type and tape-and-reel configuration. Confirm RoHS compliance status as indicated in official documentation. Check for obsolescence notices, as distributor records indicate this part may be discontinued or no longer actively stocked by major retailers. Ensure compatibility with existing BOM requirements before finalizing procurement.
Selection Notes
Select this component when designing circuits for small LCD backlights where inductor-free solutions are preferred. The 25mA per channel output is suitable for low-power LED strings. Consider the 12-WQFN footprint constraints during layout. Verify that the input voltage range of 2.8V to 4.5V aligns with the system power supply architecture.
Part Context
This part belongs to the RT9378 family of LED drivers from Richtek. It is specifically engineered for applications requiring multiple constant-current outputs in a minimal footprint. The WQFN-12 package facilitates surface-mount assembly, making it suitable for dense PCB layouts common in modern handheld and portable electronic devices.
Replacement Considerations
Publicly confirmed substitute part numbers are not available in the provided source material. Consult official Richtek documentation for potential cross-reference options or updated product line replacements.
