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.
| 類型 | 標題 | 日期 | ||
|---|---|---|---|---|
| * | Data sheet | WLED Driver for LCD Backlighting With PWM and SMBus Control Interface datasheet (Rev. A) | 2010年 8月 20日 | |
| White paper | Common LED Functions and LED Driver Design Considerations | 2020年 9月 21日 | ||
| Application note | Some Guidelines and Tips for the LED Driver Application | 2019年 8月 14日 | ||
| Application note | Performing Accurate PFM Mode Efficiency Measurements (Rev. A) | 2018年 12月 11日 | ||
| Selection guide | Power Management Guide 2018 (Rev. R) | 2018年 6月 25日 | ||
| User guide | TPS61195EVM-460 Useer's Guide | 2010年 5月 14日 |
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The TPS61195EVM software allows you to control the TPS61195EVM via the SMBus interface. This interface allows the user to:
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| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| WQFN (RUY) | 28 | Ultra Librarian |
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