The TPS65165 is a Compact LCD Bias IC with 3 high-speed operational amplifiers for gamma correction and/or VCOM supply. The device generates all 3 voltage rails for TFT-LCD displays (Vs, VGL and VGH). The device incorporates a high-voltage switch that can be controlled by a logic signal from the timing controller (TCON) to provide the gate-voltage modulation for VGH. If this function is not required, the CTRL pin can be tied high.
The device also features a high-voltage stress test, where the output voltage of VGH is typically set to 30 V, and the output voltage of Vs is programmable to any higher voltage. The high-voltage stress test is enabled by pulling the HVS pin high. Adjustable sequencing is implemented, and can be programmed by selecting the capacitor values connected to ADLY and GDLY. The device consists of a boost converter to provide the source voltage Vs operating at a fixed switching frequency of 600 kHz. A fully integrated positive charge pump, switching automatically between doubler and tripler mode provides an adjustable regulated TFT gate on voltage VGH. A negative charge pump driver provides adjustable regulated output voltage VGL. To minimize external components the charge pumps for VGH and VGL operate at a fixed switching frequency of 1.2 MHz. The device includes safety features like overvoltage protection of the boost converter, short circuit protection of VGH and VGL as well as thermal shutdown.
| Documentación principal | Tipo | Título | Opciones de formato | Descargar la versión más reciente en inglés | Fecha |
|---|---|---|---|---|---|
| * | Hoja de datos | Compact LCD Bias IC w/High Speed Amp for TV & Monitor TFT-LCD Panels datasheet (Rev. A) | 25/05/2007 | ||
| Nota sobre la aplicación | Understanding Undervoltage Lockout in Power Devices (Rev. A) | 19/09/2018 | |||
| Guía de selección | Power Management Guide 2018 (Rev. R) | 25/06/2018 | |||
| Nota sobre la aplicación | Generation of a VCOM buffer input using PWM signal | 21/12/2015 | |||
| Nota sobre la aplicación | Minimizing Ringing at the Switch Node of a Boost Converter | 15/09/2006 |
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The TPS65165EVM-233 takes a 2.5 V to 6 V input rail and provides the three bias-supply voltages and 3 integrated op amps that are required for TV and mointor TFT-LCD panels. The TPS65165EVM-233 has one boost converter with an integrated low-side FET, one negative charge-pump (...)
| Encapsulado | Pines | Símbolos CAD, huellas y modelos 3D |
|---|---|---|
| WQFN (RSB) | 40 | Ultra Librarian |
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