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Product Detailed Parameters
- Description：IC LED DRIVER CTRLR PWM 14SOP
- Series：-
- Mfr：Richtek USA Inc.
- Package：Tape & Reel (TR),Cut Tape (CT)
- Type：DC DC Controller
- Topology：Step-Down (Buck), Step-Up (Boost)
- Internal Switch(s)：No
- Number of Outputs：1
- Voltage - Supply (Min)：4.5V
- Voltage - Supply (Max)：36V
- Voltage - Output：90V
- Current - Output / Channel：-
- Frequency：350kHz
- Dimming：Analog, PWM
- Applications：Backlight, Lighting
- Operating Temperature：-40°C ~ 125°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：14-SOIC (0.154", 3.90mm Width)
- Supplier Device Package：14-SOP
- Grade：-
- Qualification：-
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Overview
The RT8475ZS is an LED driver controller manufactured by Richtek USA Inc., designed for high-current lighting applications. It operates as a current mode PWM controller that drives an external MOSFET. The device supports Buck and Boost topologies, accommodating input voltages from 4.5V to 36V and output voltages up to 90V. It features a fixed switching frequency of 350kHz and supports both analog and PWM dimming methods. Packaged in a 14-SOP (0.154", 3.90mm width) with an exposed pad, it functions within a junction temperature range of -40°C to 125°C.
Feature Summary
- Current mode PWM control architecture for driving external MOSFETs
- Supports Buck and Boost converter topologies for flexible LED drive configurations
- Integrated analog and PWM dimming capabilities for brightness control
Applications
- LED backlighting systems
- General solid-state lighting fixtures
Procurement Notes
Verify the specific suffix 'ZS' against the manufacturer's latest datasheet to confirm package dimensions and tape/reel specifications. Confirm RoHS compliance status and moisture sensitivity level (MSL) ratings prior to PCB assembly planning. Ensure the external MOSFET selection aligns with the controller's drive strength and voltage ratings for reliable operation.
Selection Notes
Select this component when designing LED drivers requiring both buck and boost functionality within a single controller. It is suitable for applications needing precise current regulation via external MOSFETs. Consider the 14-SOP package constraints and thermal dissipation requirements associated with the exposed pad design for high-power implementations.
Part Context
The RT8475 series belongs to Richtek's portfolio of LED driver controllers aimed at general lighting and backlight markets. These devices typically integrate protection features and are designed to work with external power switches to handle higher currents than monolithic solutions. The ZS suffix denotes the specific 14-SOP package variant.
Replacement Considerations
Publicly confirmed substitute part numbers for the RT8475ZS were not found in the provided source material. Verify compatibility with alternative controllers based on pinout, topology support, and dimming interface requirements.
