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BD9897FS
Product Advantage ▼
This BD9897FS SSOP32 inverter controller IC adopts single-channel full-bridge driving architecture for CCFL backlight circuits. It realizes precise lamp current and voltage closed-loop feedback control, stabilizing CCFL operating status and avoiding screen flicker on LCD monitors and televisions.
As a classic ROHM backlight driver IC, it supports two dimming schemes: PWM burst mode and external DC linear adjustment. Designers can freely match system control signals to achieve smooth brightness adjustment. It meets diverse brightness control demands for different LCD panel solutions.
The CCFL control IC integrates comprehensive protection mechanisms including soft-start circuit, under voltage lockout and short-circuit timer latch. Soft start prevents large inrush current during startup, while fault latch function protects transformers and CCFL lamps from permanent damage under abnormal working conditions.
BD9897FS supports synchronous connection of multiple identical ICs. It eliminates beat frequency noise caused by unsynchronized frequency on multi-lamp large-size LCD screens. Stable synchronous operation improves display quality and reduces audible noise of LCD inverter power boards.
Adopted universal SSOP-A32 surface mount form factor, suitable for standard SMT soldering. This DC-AC PMIC is a common replacement chip for original LCD TV and monitor inverter boards. It remains highly demanded for electronics maintenance and after-sales repair industry.
Technical Parameters
Parameter Item | Specification Value |
|---|---|
Model | BD9897FS |
Manufacturer | ROHM Semiconductor |
Function | CCFL DC-AC Inverter Controller IC |
Package | SSOP-A32 (32-SSOP) SMD |
Supply Operating Voltage | 7.5 V ~ 30 V |
Absolute Max VCC | 36 V |
Operating Frequency | 60 kHz ~ 180 kHz |
Quiescent Supply Current | 7.2 mA |
Control Topology | Single Channel Full-Bridge Drive |
Dimming Method | PWM signal & DC voltage linear dimming |
Protection | UVLO, Soft Start, Short Circuit Timer Latch |
Synchronization | Multi BD9897FS synchronous function |
Operating Temperature | -40 ℃ ~ +85 ℃ |
Max Power Dissipation | 950 mW |
Compliance | RoHS Lead-free |
Product Uses ▼
The BD9897FS CCFL driver IC serves as core controller for medium & large-size LCD TV backlight power modules. Accurate current feedback ensures consistent brightness of CCFL tubes. It is the standard original chip for many well-known brand TV inverter circuits and repair replacement parts.
Perfectly applied to traditional CCFL-type desktop and industrial LCD monitors. Stable full-bridge drive reduces backlight flicker during long-time display work. This SSOP32 inverter control IC is widely stocked by maintenance technicians for monitor power board troubleshooting.
Suitable for industrial control panels, medical display equipment equipped with CCFL backlight. Wide operating temperature range and reliable protection circuits adapt to non-ideal power environment. It guarantees continuous stable operation of professional display terminals.
As an original discontinued backlight chip, BD9897FS is a mainstream replacement component for faulty inverter boards. Many repair shops rely on this IC to restore failed CCFL backlight systems of second-hand televisions and display devices.
Engineers use this DC-AC inverter controller IC to develop customized low-frequency AC inverter circuits for special CCFL lighting equipment. Flexible frequency setting and synchronous function bring convenience for small-batch special light source power design projects.
FAQ ▼
Q1: What kind of backlight does BD9897FS support?
A: It is dedicated for CCFL cold cathode fluorescent lamp, not applicable for LED backlight circuits.
Q2: Can multiple BD9897FS work synchronously?
A: Yes, the chip reserves synchronous pin to connect multiple ICs and avoid frequency interference.
Q3: Is BD9897FS new production stock?
A: The model is discontinued by ROHM. Available stocks are original inventory mainly for maintenance replacement.
