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TLC5921DAPRG4 Datasheet(PDF) 4 Page - Texas Instruments |
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TLC5921DAPRG4 Datasheet(HTML) 4 Page - Texas Instruments |
4 / 15 page TLC5921 LED DRIVER SLLS390 – SEPTEMBER 1999 4 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 Terminal Functions TERMINAL I/O DESCRIPTION NAME NO. I/O DESCRIPTION SIN 5 I 1 bit serial data input SOUT 28 O 1 bit serial data output SCLK 4 I Clock input for data transfer. All the data in the shift register is shifted to MSB by 1 bit synchronizing to the rising edge of SCLK, and data at SIN is shifted to LSB at the same time. (Schmitt buffer input) XLAT 3 I Latch. When XLAT is high, data on shift register goes through latch. When XLAT is low, data is latched. Accordingly, if data on shift register is changed during XLAT high, this new value is latched (level latch). This terminal is internally pulled down with 100k Ω. SOMODE 30 I Timing select for serial data output. When SOMODE is low, output data on SOUT is changed synchronizing to the rising edge of SCLK. When SOMODE is high, output data on SOUT is changed synchronizing to the falling edge of SCLK. OUT0 – OUT15 7,8,10,11,12,13, 15,16,17,18,20, 21,22,23,25,26 O Constant current output. BLANK 2 I Blank(Light off). When BLANK is high, all the output of constant current driver is turned off. When BLANK is low and data written to latch is 1, the corresponding constant current output turns on (LED on). This terminal is internally pulled up with 100k Ω. IREF 31 I Constant current value setting. LED current is set to desired value by connecting external resistor between IREF and GND. The 38 times current compared to current across external resistor sink on output terminal. XDOWN 29 O Error output. XDOWN is configured as open collector. It goes low when TSD or LOD functions. VCC 32 Power supply voltage GND 1 Ground PGND 6,9,14,19,24,27 Ground for LED driver. (Internally connected to GND) THERMAL PAD package bottom Heat sink pad. This pad is connected to the lowest potential to IC or thermal layer. absolute maximum ratings (see Note 1)† Supply voltage, VCC – 0.3 V to 7 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Output current (dc), IO(LC) 90 mA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Input voltage range, VI – 0.3 V to VCC + 0.3 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Output voltage range, VO(SOUT), VO(XDOWN) – 0.3 V to VCC + 0.3 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Output voltage range, VO(OUTn) – 0.3 V to 18 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Storage temperature range, Tstg –40 °C to 150°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Continuous total power dissipation at (or below) TA = 25°C 3.9 W . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Power dissipation rating at (or above) TA = 25°C 31.4 mW/ °C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . † Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. NOTE 1: All voltage values are with respect to GND terminal. |
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