Dual-output TFT LCD bias supply in a 15-DSBGA package
The Texas Instruments TPS65132SYFFR is a dual-output DC/DC converter specifically designed for TFT LCD bias supplies. It generates both a positive and a negative output rail from a single input voltage ranging from 2.5V to 5.5V, making it suitable for powering the gate and source drivers in small-to-medium format LCD panels. The two outputs are independently adjustable from ±4V to ±6V, covering the typical bias requirements for a-Si and LTPS TFT displays. Housed in a 15-pin DSBGA package (0.4mm pitch), the TPS65132SYFFR occupies minimal board area — a key consideration for space-constrained handheld and portable display modules.
The input supply range of 2.5V to 5.5V directly answers the common question: yes, the TPS65132SYFFR works with a 3.3V input supply. It also accepts 5V USB or regulated 2.5V to 3.0V Li-ion battery rails. The wide range gives the designer flexibility to share a single power rail across the display bias and the rest of the system without an extra regulator.
ROHS3 compliant.
Package and assembly: 15-DSBGA
The 15-DSBGA package (also designated 15-UFBGA) is a fine-pitch BGA with 0.4mm ball pitch. The small footprint (approximately 2.0mm × 2.5mm) is ideal for compact display driver boards, but the layout engineer should allocate dedicated inner-layer planes for the positive and negative output rails to minimize ripple coupling.