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Product Detailed Parameters
- Description：IC LED DRVR RGLTR PWM 40HTSSOP
- 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：400mA
- Frequency：500kHz
- Dimming：Analog, PWM
- Applications：Backlight
- Operating Temperature：-40°C ~ 85°C (TA)
- Mounting Type：Surface Mount
- Package / Case：40-VSSOP (0.213", 5.40mm Width) Exposed Pad
- Supplier Device Package：40-HTSSOP-B
- Grade：-
- Qualification：-
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Overview
The BD9397EFV-GE2 is a white LED driver IC designed for large LCD panels, integrating a high-performance 6-channel LED driver and a single-channel boost DC/DC converter. It provides a constant current of 400mA per channel with ±1.8% accuracy. The device supports independent PWM dimming for each channel and analog linear dimming via the VREF pin. Operating within a wide input voltage range, it utilizes an external FET for the boost controller to accommodate various LED array configurations.
Feature Summary
- Integrates a 6-channel constant current LED driver with 400mA output capability per channel.
- Includes a single-channel boost DC/DC converter using an external FET for flexible voltage handling.
- Provides independent PWM dimming control for each of the six channels.
- Features comprehensive protection mechanisms including OVP, OCP, SCP, and open/short detection.
Applications
- Large LCD panel backlighting systems
- White LED array driving in display modules
- High-efficiency LED lighting drivers
Procurement Notes
Verify the specific suffix GE2 against the manufacturer's latest documentation to confirm package type and tape/reel specifications. Ensure compatibility with external FET selection for the boost converter stage. Confirm RoHS compliance status as indicated in official datasheets before finalizing procurement orders.
Selection Notes
Select this component when designing large LCD backlights requiring high channel count and precise current regulation. The integrated boost topology simplifies design by reducing external component count compared to discrete solutions. Consider the ±1.8% current accuracy for uniformity requirements and ensure thermal management aligns with the 400mA per channel load.
Part Context
This part belongs to ROHM Semiconductor's series of efficient white LED drivers specifically engineered for large LCD applications. It combines power conversion and multi-channel driving capabilities into a single IC, streamlining the design process for display manufacturers seeking reliable and compact backlight solutions.
Replacement Considerations
BD9422EFV-E2 is listed as a parameter-equivalent alternative. Verify channel count differences (6 vs 4) and current ratings during substitution analysis.
FAQ
How is dimming controlled on the BD9397EFV-GE2?
The device supports independent PWM dimming for each of the six channels and allows for analog linear dimming through the VREF pin.
What protection features are included in this IC?
It includes overvoltage protection (OVP), overcurrent limit protection (OCP), short circuit protection (SCP), and LED string open detection.
