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Product Detailed Parameters
- Description：IC LED DRV RGLTR PWM 10WLCSP
- Series：-
- Mfr：Richtek USA Inc.
- Package：Tape & Reel (TR),Cut Tape (CT)
- Type：DC DC Regulator
- Topology：Step-Up (Boost)
- Internal Switch(s)：Yes
- Number of Outputs：2
- Voltage - Supply (Min)：2.5V
- Voltage - Supply (Max)：5.5V
- Voltage - Output：23V
- Current - Output / Channel：20mA
- Frequency：1.1MHz
- Dimming：PWM
- Applications：Backlight
- Operating Temperature：-40°C ~ 85°C (TA)
- Mounting Type：Surface Mount
- Package / Case：10-UFBGA, WLCSP
- Supplier Device Package：10-WLCSP (0.87x2.07)
- Grade：-
- Qualification：-
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Overview
The RT4501WSC is a DC-DC step-up LED driver IC manufactured by Richtek USA Inc. It features two output channels, each capable of delivering up to 20mA. The device operates with an input voltage range from 2.5V to 5.5V and provides a maximum output voltage of 23V. It utilizes PWM dimming for brightness control and functions at a switching frequency of 1.1MHz. The component is housed in a compact 10-WLCSP package measuring 0.87x2.07mm.
Feature Summary
- Integrates internal power switches within a boost converter topology for efficient LED driving.
- Supports precise digital brightness adjustment through PWM dimming interface.
- Designed for surface-mount installation in space-constrained portable applications.
Applications
- Mobile phone display backlighting
- Tablet computer screen illumination
- Portable electronic device lighting systems
Procurement Notes
Verify the specific suffix 'WSC' corresponds to the required 10-WLCSP packaging and tape-and-reel configuration during sourcing. Confirm that the RoHS3 compliance status meets current environmental regulations for the target assembly process. Ensure compatibility with the specified -40°C to 85°C operating temperature range for the intended application environment.
Selection Notes
Select this component when designing circuits requiring dual-channel constant current drive for LED arrays with limited board space. Consider the 1.1MHz switching frequency for optimizing external passive component sizes. Evaluate the 2.5V to 5.5V input range against the system's battery or supply rail characteristics to ensure stable operation under all load conditions.
Part Context
This part belongs to the RT4501 family of LED drivers from Richtek. It is specifically engineered for high-efficiency power conversion in mobile devices. The WSC variant denotes the specific wafer-level chip-scale package format suitable for automated surface-mount technology assembly processes.
Replacement Considerations
RT4501A is a related variant within the same product family. Verify pinout and electrical parameter equivalence before substitution. Cross-reference datasheets to confirm functional compatibility regarding dimming interfaces and thermal performance.
FAQ
What is the maximum output voltage capability of the RT4501WSC?
The device supports a maximum output voltage of 23V.
Does the RT4501WSC support analog dimming?
No, the component specifically supports PWM (Pulse Width Modulation) dimming for brightness control.
How many output channels does this LED driver provide?
The RT4501WSC provides two independent output channels.
