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Product Detailed Parameters
- Description：IC LED DRV RGLTR PWM 28HSOP
- Series：-
- Mfr：Rohm Semiconductor
- 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)：9V
- Voltage - Supply (Max)：35V
- Voltage - Output：-
- Current - Output / Channel：250mA
- Frequency：150kHz
- Dimming：PWM
- Applications：Backlight
- Operating Temperature：-40°C ~ 85°C (TA)
- Mounting Type：Surface Mount
- Package / Case：28-SOP (0.295", 7.50mm Width) + 2 Heat Tabs
- Supplier Device Package：28-HSOP-M
- Grade：-
- Qualification：-
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Overview
The BD9470AFM-GE2 is a white LED driver IC designed for medium to large LCD backlight applications. It features a boost topology with six independent output channels, each capable of delivering up to 250 mA. The device operates on an input voltage range of 9 V to 35 V and supports PWM dimming for precise brightness control. Packaged in a 28-pin HTSSOP-B (HSOP-M) format, it integrates constant current regulation suitable for high-reliability display systems.
Feature Summary
- Six-channel constant current regulation for uniform LED string driving
- Integrated high-speed isolation capability for safety compliance
- Supports PWM dimming for accurate brightness adjustment
- Boost converter topology optimized for LCD backlight power requirements
Applications
- Medium-sized LCD panel backlighting
- Large-sized LCD panel backlighting
- Commercial display systems requiring multi-string LED drive
- Industrial monitors utilizing isolated LED drivers
Procurement Notes
Verify the specific suffix 'E2' against the manufacturer's latest datasheet to confirm environmental compliance and pinout compatibility. Confirm that the HTSSOP-B-28 package matches your PCB footprint design. Ensure the application circuit accounts for the 150 kHz switching frequency and thermal dissipation limits specified in the official documentation.
Selection Notes
Select this component when designing displays requiring six independently controlled LED strings with high current capacity. It is suitable for systems needing integrated isolation features and PWM dimming control. Consider the 28-pin surface mount package constraints and the 9 V to 35 V input voltage range during schematic design.
Part Context
This part belongs to ROHM's BD9470 series of white LED drivers, specifically engineered for LCD backlights. It shares functional similarities with other multi-channel drivers but is distinguished by its six-output configuration and integrated isolation characteristics. The series targets high-performance display applications requiring robust current regulation.
Replacement Considerations
Check for direct substitutes within the BD9470 family or other ROHM multi-channel boost drivers. Verify pin-to-pin compatibility and electrical parameter alignment before substitution. Consult the manufacturer's obsolescence notices as some variants may be marked NRND.
