The TPS61195 IC provides highly integrated solutions for large-size LCD backlighting. This device has a built-in high efficiency boost regulator with integrated 2.5A/50V power MOSFET. The eight current sink regulators provide high precision current regulation and matching. In total, the device can support up to 96 LEDs. Unused sinks are disabled by tying them to ground. The boost output automatically adjusts its voltage to the WLED forward voltage to improve efficiency.
The TPS61195 supports multiple brightness dimming methods. During PWM dimming, each IFB pin’s current is turned on/off at the duty cycle and frequency determined by an integrated pulse width modulation (PWM). The frequency of this signal is resistor programmable, while the duty cycle is controlled directly either from an external PWM signal input to the DPWM pin or through the SMBUS interface. Additionally, the SMBUS interface provides some operational reporting data such as if one or more strings have failed or if the IC is over-heating. In direct PWM dimming mode, each IFB current is turned on/off at same duty cycle and frequency as the PWM signal input on the DPWM pin. In analog dimming mode, the input PWM duty cycle information is translated to analog signal to control the WLED current signal linearly over 1% to 100% brightness area.
The TPS61195 integrates over-current and short-circuit protection, soft start and over temperature protection circuit. The device also provides programmable output over-voltage protection, and the threshold is adjusted by external resistor divider combination.
The TPS61195 IC has built-in linear regulator for the IC supply. The device is in a 4×4 mm QFN package.
| Documentación principal | Tipo | Título | Opciones de formato | Descargar la versión más reciente en inglés | Fecha |
|---|---|---|---|---|---|
| * | Hoja de datos | WLED Driver for LCD Backlighting With PWM and SMBus Control Interface datasheet (Rev. A) | 20/08/2010 | ||
| Informe | Common LED Functions and LED Driver Design Considerations | 21/09/2020 | |||
| Nota sobre la aplicación | Some Guidelines and Tips for the LED Driver Application | 14/08/2019 | |||
| Nota sobre la aplicación | Performing Accurate PFM Mode Efficiency Measurements (Rev. A) | 11/12/2018 | |||
| Guía de selección | Power Management Guide 2018 (Rev. R) | 25/06/2018 | |||
| Guía del usuario | TPS61195EVM-460 Useer's Guide | 14/05/2010 |
Para conocer los términos adicionales o los recursos necesarios, haga clic en cualquier título de abajo para ver la página de detalles cuando esté disponible.
The TPS61195EVM software allows you to control the TPS61195EVM via the SMBus interface. This interface allows the user to:
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| Encapsulado | Pines | Símbolos CAD, huellas y modelos 3D |
|---|---|---|
| WQFN (RUY) | 28 | Ultra Librarian |
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