RT4539WSC

$3.05

Description：IC LED DRV RGLTR 35MA WL-CSP-20
Series：-
Mfr：Richtek USA Inc.
Package：Tape & Reel (TR),Cut Tape (CT)

SKU:ecd44a32f726 Category: LED Drivers IC Brand: Richtek USA Inc.

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Product introduction

Product Detailed Parameters

Description：IC LED DRV RGLTR 35MA WL-CSP-20
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：6
Voltage - Supply (Min)：2.7V
Voltage - Supply (Max)：24V
Voltage - Output：2.7V ~ 36V
Current - Output / Channel：35mA
Frequency：300kHz ~ 1.6MHz
Dimming：Analog, I2C, PWM
Applications：Backlight
Operating Temperature：-40°C ~ 85°C (TA)
Mounting Type：Surface Mount
Package / Case：20-UFBGA, WLCSP
Supplier Device Package：20-WLCSP (1.71x2.37)
Grade：-
Qualification：-

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RT4539WSC

Overview

The RT4539WSC is a high-efficiency boost converter featuring an integrated I2C-controlled 6-channel LED driver designed for white LEDs. It operates with an input voltage range of 2.7V to 24V and provides regulated output voltages from 2.7V to 36V. The device supports up to 35mA per channel and utilizes a 20-wafer-level chip-scale package (WLCSP) measuring 1.71mm by 2.37mm. It functions within a temperature range of -40°C to +85°C.

Feature Summary

Integrates a high-efficiency boost converter with a dedicated six-channel LED driver.
Enables precise control via I2C interface for configuration and dimming.
Supports analog, I2C, and PWM dimming methods for flexible brightness adjustment.

Applications

White LED backlighting systems
Portable electronic devices requiring compact power solutions
Mobile phone display illumination

Procurement Notes

Verify the specific suffix WSC against the manufacturer datasheet to confirm package type and tape-and-reel specifications. Ensure compatibility with I2C bus voltage levels in the target system design. Confirm RoHS3 compliance status if required by regulatory standards. Cross-reference the MSL rating for proper handling during assembly processes.

Selection Notes

Select this component when space constraints necessitate a small WLCSP footprint combined with multi-channel LED regulation. It is suitable for applications requiring independent channel control through digital interfaces. Consider the maximum output voltage limit of 36V relative to the series LED string requirements. Evaluate thermal performance within the specified operating temperature range.

Part Context

This part belongs to Richtek's family of high-efficiency boost converters with integrated LED drivers. It is designed to replace older discrete solutions by combining power conversion and regulation into a single compact package. The device targets modern mobile and portable electronics where board real estate is limited.

Replacement Considerations

Consult official substitution lists for pin-compatible alternatives. Verify electrical parameters such as output current and voltage ranges match the original design requirements before switching components.