The TPS61150A is a high frequency boost converter with two regulated current outputs for driving WLEDs. Each current output can be individually programmed through external resistors. There is dedicated selection pin for each output, so the two outputs can be turned on separately or simultaneously. The output current can be reduced by a pulse width modulation (PWM) signal on the select pins or an analog voltage on the ISET pin. The boost regulator runs at 1.2MHz fixed switching frequency to reduce output ripple and avoid audible noises associated with PFM control.
The two current outputs are ideal for driving WLED backlight for the sub and main displays in clam shell phones. The two outputs can also be used for driving display and keypad backlights. When used together, the two outputs can drive up to 14 WLED for one large display.
In addition to the small inductor, small capacitor and 3mm x 3mm QFN package, the built-in MOSFET and diode eliminate the need for any external power devices. Overall, the IC provides an extremely compact solution with high efficiency and plenty of flexibility.
| Typ | Titel | Datum | ||
|---|---|---|---|---|
| * | Data sheet | Dual Output Boost WLED Driver Using Single Inductor datasheet | 06 Okt 2006 | |
| White paper | Common LED Functions and LED Driver Design Considerations | 21 Sep 2020 | ||
| Application note | Performing Accurate PFM Mode Efficiency Measurements (Rev. A) | 11 Dez 2018 | ||
| Selection guide | Power Management Guide 2018 (Rev. R) | 25 Jun 2018 | ||
| Application note | Extending the Soft Start Time Without a Soft Start Pin (Rev. B) | 15 Jun 2017 | ||
| Analog Design Journal | IQ: What it is, what it isn’t, and how to use it | 17 Jun 2011 | ||
| EVM User's guide | TPS61150EVM-150 (Rev. A) | 26 Okt 2006 | ||
| Application note | Minimizing Ringing at the Switch Node of a Boost Converter | 15 Sep 2006 |
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| Gehäuse | Pins | Herunterladen |
|---|---|---|
| VSON (DRC) | 10 | Optionen anzeigen |
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