SLVSA96A September 2015 – March 2016 TLC59291
PRODUCTION DATA.
NOTE
Information in the following applications sections is not part of the TI component specification, and TI does not warrant its accuracy or completeness. TI’s customers are responsible for determining suitability of components for their purposes. Customers should validate and test their design implementation to confirm system functionality.
The device is a 8/16-channel, constant sink current, LED driver. This device is typically connected in series to drive many LED lamps with only a few controller ports. On/Off control data and FC control data can be written from the SIN input terminal. The device has six type error flags: LED open detection (LOD), LED short detection (LSD), output leak detection (OLD), reference terminal short detection (ISF), Pre themal warning (PTW) and thermal error flag (TEF).
In this application, the device VCC and LED lamp anode voltages are supplied from different power supplies.
The parameters for the design example are shown in Table 16.
PARAMETER | VALUE |
---|---|
VCC input voltage range | 3 V to 5.5 V |
LED lamp (VLED) input voltage range | Maximum LED forward voltage (VF) + 0.3 V (knee voltage) |
SIN, SCLK, LAT, and GSCLK voltage range | Low level = GND, High level = VCC |
To begin the design process, a few parameters must be decided upon. The designer needs to know the following: