|Package | PIN:||PWP | 20|
|Temp:||Q (-40 to 125)|
- Qualified for Automotive Applications
- Device Temperature Grade 1: –40°C to 125°C Ambient Operating TemperatureRange
- Device HBM ESD Classification Level H2
- Device CDM ESDClassification Level C3B
- 8-Channel LED Driver With Analog and PWM Dimming
- Wide Input-Voltage Range: 5 V–40 V
- Adjustable Constant Output Current Set by Reference Resistor
- Maximum Current: 70 mA per Channel
- Maximum Current: 560 mA in Parallel Operation Mode
- Accuracy: ±3% per Channel
- Accuracy: ±4% perDevice
- PWM Dimming Input (PWM)
- Turn ON/OFF Delay Time: 25 µs (typ.), 45 µs(max.)
- 4-Bank PWM Dimming to Control 8 Channels
- Open- and Shorted-LED Detection With Deglitch
- Fault Pin for Open, Short, and Thermal-Shutdown Failure Reporting, Allowing Parallel Bus Connection of up to 15 Devices
- Temperature-Current Foldback to Prevent Thermal Shutdown, With Programmable Threshold
- Single Resistor for Stop-Current Set Point
- Single Resistor for Tail-Current Set Point
- Operating Junction Temperature Range –40°C to 150°C
- Package: 20-Pin Thermally Enhanced PWP Package (PDSO)
All trademarks are the property of their respective owners.
Texas Instruments TPS92638QPWPRQ1
The TPS92638-Q1 is aneight-channel linear LED driver with PWM dimming control. Its design is ideal for driving multiplestrings of LEDs up to a medium power range.
This device can drive up to eight strings with one to three LEDs in each string, at atotal current up to 70 mA per channel. Outputs can be in parallel to provide higher-current driveup to 560 mA.
In multiple-string applications, the device offers the advantage of having common-cathodeconnection of the LED stings. So, there is only a single return wire needed instead of one per LEDstring that a system with low-side current sense would need.
The device has the capability for switching LED current between high current and lowcurrent for stop and tail applications. Two reference resistors set the two LED current levels fromeach output.
The included temperature monitor reduces the LED drive current if the IC junctiontemperature exceeds a thermal threshold. The temperature threshold is programmable through anexternal resistor. One can disable the thermal current-monitor feature by connecting the TEMP pinto ground. Output of the junction temperature as an analog voltage is available as a factoryprogram option.