The TPS9263x-Q1 devices are three-channel linear LED drivers with analog and PWM dimming control. Their full-diagnostic and built-in protection capabilities make them the ideal solution for variable-intensity LED lighting applications up to the medium-power range.
The design of this device suits it well for driving LEDs configured as a single string or multiple strings within its power capability. A single device can drive up to three strings with one to three LEDs in each string at a total current of up to 150 mA per channel. Outputs can be paralleled to provide higher current drive capability to 450 mA.
In multiple-string applications, the device offers the advantage of having common-cathode connection of the LED strings. So, the application needs is only a single return wire instead of one return wire per LED string that a system with low-side current sense would need.
A single-LED short comparator allows detection of single LED failing with a short circuit. Fault output can support bus connection topology between multiple ICs.
The included temperature monitor reduces the LED drive current if the IC junction temperature exceeds a thermal threshold. One can program the temperature threshold through an external resistor. One can disable the thermal current-monitor feature by connecting the TEMP pin to ground. Output of the junction temperature as an analog voltage is available as a factory program option.
|Vin (Min) (V)|
|Vin (Max) (V)|
|Vout (Min) (V)|
|Vout (Max) (V)|
|Iout (Max) (A)|
|Iq (Typ) (mA)|
|LED Current Per Channel (mA)|
|Operating Temperature Range (C)|
|Estimated Package Size (WxL) (mm2)|
|Approx. Price (US$)|
|-40 to 125|| -40 to 105 |
-40 to 125
|-40 to 125|
|Thermal Foldback||Thermal Shutdown||Thermal Foldback|
| Dome |
| Fog |
| Dome |
|HTSSOP|| DDPAK/TO-263 |
|16HTSSOP: 4.4 x 5: 32 mm2|| 8SON: 4 x 4: 16 mm2 |
7DDPAK/TO-263: 9.25 x 10: 113 mm2
|20HTSSOP: 4.4 x 6.5: 42 mm2|
|0.90 | 1ku||0.40 | 1ku||1.20 | 1ku|
|Current Source||Current Source||Current Source|
|Sample & Buy||Sample & Buy||Sample & Buy|