TLC5921DAP

TLC5921 LED DRIVER SLLS390 – SEPTEMBER 1999 D D D D D D D D D D D D D D Drive Capability and Output Counts – 80 mA (Current Sink) x 16 Bits Constant Current Output Range – 1 to 80 mA (Current Value Setting for All Output Terminals Using External Resistor) Constant Current Accuracy – ± 1% (Typ) – ± 4% (Max) (Maximum Error Between Bits, All Bits On) Voltage Applied to Constant Current Output Terminal – Minimum 0.6 V (Output Current 40 mA) – Minimum 1 V (Output Current 80 mA) Data Input – Clock Synchronized 1 Bit Serial Input Data Output – Clock Synchronized 1 bit Serial Output (With Timing Selection) Input/Output Signal Level . . . CMOS Level Power Supply Voltage . . . 4.5 V to 5.5V Maximum Output Voltage . . . 17 V (Max) Data Transfer Rate . . . 20 MHz (Max) Operating Free-Air Temperature Range –20°C to 85°C Available in 32 Pin HTSSOP DAP Package (PD=3.9 W, TA = 25°C) LOD Function . . . LED Open Detection (Error Signal Output at LED Disconnection) TSD Function . . . Thermal Shutdown (Turn Output Off When Junction Temperature Exceeds Limit) DAP PACKAGE (TOP VIEW) GND BLANK XLAT SCLK SIN PGND OUT0 OUT1 PGND OUT2 OUT3 OUT4 OUT5 PGND OUT6 OUT7 1 32 2 31 3 30 4 29 5 28 6 27 7 26 8 25 9 24 10 23 11 22 12 21 13 20 14 19 15 18 16 17 VCC IREF SOMODE XDOWN SOUT PGND OUT15 OUT14 PGND OUT13 OUT12 OUT11 OUT10 PGND OUT9 OUT8 description The TLC5921 is a current-sink constant current driver incorporating shift register and data latch. The current value at constant current output can be set by one external register. The device also incorporates thermal shutdown (TSD) circuitry which turns constant current output off when the junction temperature exceeds the limit, and LED open detection (LOD) circuitry to report the LED was disconnected. Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. Copyright  1999, Texas Instruments Incorporated PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 1 TLC5921 LED DRIVER SLLS390 – SEPTEMBER 1999 functional block diagram VCC SOMODE SCLK 16 bits Shift Register SIN Timing Selector SOUT 16 bits Data Latch XLAT 100 kΩ 100 kΩ BLANK IREF XDOWN 16 bits Constant Current Driver and LED Disconnection detection TSD GND PGND OUT0 2 OUT15 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 TLC5921 LED DRIVER SLLS390 – SEPTEMBER 1999 equivalent input and output schematic diagrams Input (except SCLK) Input (SCLK) VCC VCC INPUT INPUT GND GND SOUT VCC OUTPUT GND XDOWN XDOWN GND OUTn OUTn GND POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 3 TLC5921 LED DRIVER SLLS390 – SEPTEMBER 1999 Terminal Functions ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ TERMINAL 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 100kΩ. 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. 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 100kΩ. 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 OUT0 – OUT15 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. 4 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 TLC5921 LED DRIVER SLLS390 – SEPTEMBER 1999 recommended operating conditions ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁ ÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁ ÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁ ÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁ ÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁ ÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁ ÁÁÁÁ ÁÁÁ ÁÁÁ Á ÁÁ ÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁ ÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁ ÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁ ÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁ ÁÁ Á ÁÁÁ ÁÁ ÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ dc characteristics PARAMETER CONDITIONS MIN Supply voltage, VCC NOM 4.5 Voltage applied to constant current output, VO OUT0 to OUT15 off High-level input voltage, VIH Low-level output current, IOL VCC = 4.5 V, SOUT VCC = 4.5 V, SOUT, XDOWN Constant output current, IO(LC) OUT0 to OUT15 MAX UNIT 5.5 V 17 V 0.8 VCC VCC V GND 0.2 VCC V Low-level input voltage, VIL High-level output current, IOH 5 Operating free-air temperature range, TA –1 1 – 20 mA 80 mA 85 °C ac characteristics, MIN/MAX: VCC = 4.5 V to 5.5 V, TA = –20 to 85°C TYP: VCC = 5 V, TA = 25°C (unless otherwise noted) PARAMETER CONDITIONS MIN TYP MAX At single operation 20 At cascade operation (SOMODE = L) 15 fSCLK SCLK clock frequency twh/twl twh SCLK pulse duration 20 XLAT pulse duration 10 tr/tf Rise/fall time tsu Setup time th Hold time 5 XLAT – SCLK 5 SIN – SCLK 20 XLAT – SCLK 20 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 MHz ns ns 100 SIN – SCLK UNIT ns ns ns 5 TLC5921 LED DRIVER SLLS390 – SEPTEMBER 1999 electrical characteristics, MIN/MAX: VCC = 4.5 V to 5.5 V, TA = – 20 to 85°C TYP: VCC = 5 V, TA = 25°C (unless otherwise noted) ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ PARAMETER TEST CONDITIONS High-level output voltage IOH = – 1 mA VOL II Low-level output voltage IOL = 1 mA VI = VCC or GND (except BLANK, XLAT) ICC Supply current TYP MAX VCC –0.5V VOH Input current MIN UNIT V 0.5 V ±1 µA Input signal is static, VO = 1 V, R(IREF) = 10 kΩ, All output bits turn off 3 4.5 Input signal is static, VO = 1 V RIREF = 1300 Ω, All output bits turn off 7 9 Input signal is static, VO = 1 V, R(IREF) = 640 Ω, All output bits turn off 11 15 Data transfer, R(IREF) = 1300 Ω, VO = 1 V, All output bits turn on 15 20 Data transfer, R(IREF) = 640 Ω, VO = 1 V, All output bits turn on 35 50 VO = 1 V, VO = 1 V R(IREF) = 1300 Ω R(IREF) = 640 Ω 35 40 45 mA 70 80 90 mA 0.1 µA 1 µA mA IOL(C1) IOL(C2) Constant output current Ilkg lk Constant output leakage current ∆IO(LC) Constant output current error between bit VO = 1 V, R(IREF) = 640 Ω, All output bits turn on ±1 ±4 % I∆O(LC1) Changes in constant output current depend on supply voltage Vref = 1.3 V ±1 ±4 %/V I∆O(LC2) Changes in constant output current depend on output voltage VO = 1 V to 3 V, Vref = 1.3 V, ±2 ±6 %/V T(tsd) Vref TSD detection temperature Junction temperature 160 170 °C Reference voltage R(IREF) = 640 Ω V(LEDDET) LED disconnection detection voltage Constant output current OUT0 to OUT15 (V(OUTn) = 15 V) XDOWN (5V pullup) R(IREF) = 1300 Ω, 1 bit output turn on 150 1.3 V 0.3 V switching characteristics, CL = 15 pF PARAMETER tr Rise time tf Fall time tpd Propagation delay time TEST CONDITIONS TYP 15 OUTn (see Figure 1) MAX 20 300 SOUT 5 OUTn 300 BLANK↑ – OUTn 400 650 BLANK↓ – OUTn 300 400 BLANK↑ – XDOWN (see Note 2) 600 1000 BLANK↓ – XDOWN (see Note 2) 500 1000 20 35 SCLK – SOUT NOTE 2: At external resistor 5 kΩ 6 MIN SOUT POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 10 15 UNIT ns ns ns TLC5921 LED DRIVER SLLS390 – SEPTEMBER 1999 PARAMETER MEASUREMENT INFORMATION VCC 51 Ω VCC IREF OUTn GND 1300 Ω 15 pF Figure 1. Rise Time and Fall Time Test Circuit for OUTn 100% 90% VIH or VOH 100% VIH or VOH 50% 10% 0% VIL or VOL tr VIL or VOL 0% tf td1 100% VIH 100% 50% VIH or VOH 50% 0% VIL twh 0% VIL or VOL twl Figure 2. Timing Requirements POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 7 TLC5921 LED DRIVER SLLS390 – SEPTEMBER 1999 PRINCIPLES OF OPERATION setting for constant output current value The constant current value is determined by external resistor, R(IREF) between IREF and GND. Refer constant output current characteristics shown on Figure 5 for this external resistor value. Note that more current flows if connect IREF to GND directly. constant output current operation When BLANK is low, the corresponding output is turned on if data latch value is 1, and turned off if data latch value is 0. When BLANK is high, all outputs are forced to turn off. If there is constant current output terminal left unconnected (includes LED disconnection), it should be lighted on after writing zero to corresponding data latch to its output. If this operation is not done, supply current through constant current driver will increase. shift register latch The shift register latch is configured with 16 × 1 bits. The 1 bit for constant current output data represents ON for constant current output if data is 1, or OFF if data is 0. The configuration of shift register latch is shown in below. Data Latch XLATCH OUT15 Data OUT14 Data OUT1 Data OUT0 Data (1 bits) (1 bits) (1 bits) (1 bits) 15 2 1 Shift Register SOUT 16 SCLK SIN Figure 3. Relationship Between Shift Register and Latch SOUT output timing selection By setting level of SOMODE, the SOUT output timing can be changed. When SOMODE is set to low, data is clocked out to SOUT synchronized on the rising edge of SCLK, and when SOMODE is set to high, data is clocked out to SOUT synchronized on the falling edge of SCLK. When SOMODE is set to high and shift operation is done, the data shift error can be prevented even though SCLK signal is externally buffered in serial. Note that the maximum data transfer rate in cascade operation is slower than that when SMODE is set to low. TSD (thermal shutdown) When the junction temperature exceeds the limit, TSD starts to function and turn constant current output off and XDOWN goes low. Since XDOWN is configured with open-collector output, the outputs of multiple ICs can be concatenated. To recover from constant current output off-state to normal operation, power supply should be turned off and then turned on after several seconds. 8 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 TLC5921 LED DRIVER SLLS390 – SEPTEMBER 1999 PRINCIPLES OF OPERATION LOD function (LED open detection) If any terminal voltage of constant current output (OUT0 TO 15) to be turned on is approximately below 0.3 V, XDOWN output goes low during output on by knowing LED disconnection. This function is operational for sixteen OUTn individually. To know which constant current output is disconnected, the level of XDOWN is repeatedly checked 16 times from OUT0 to OUT15 turning one constant current output on. The power supply voltage for LED should be set to that the constant current output is applied to above 0.4 V to prevent from XDOWN low when LED is lighting on normally. Note that on-time should be minimum1µs after the constant current output is turned on since XDOWN output is required approximately 1 µs. As discussed earlier, XDOWN is used for both TSD and LOD function. Therefore, BLANK is used to know which one of TSD or LOD worked when XDOWN went low at LED disconnection, that is, in this condition, when set BLANK to high, all the constant current outputs are turned off and LOD disconnection detection is disabled, then, if XDOWN was changed to high, LED disconnection must be occurred. Table 1 is an example for XDOWN output status using four LEDs. ÁÁÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁ ÁÁÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁ ÁÁÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁ ÁÁÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁ ÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁ ÁÁÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁ ÁÁÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁ ÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁ ÁÁÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁ ÁÁÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁ ÁÁÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁ ÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁ ÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ Table 1. XDOWN Output Example LED NUMBER 1 2 3 4 LED STATUS GOOD NG GOOD NG OUTn ON ON ON ON DETECTION RESULT GOOD NG GOOD NG XDOWN LOW (by case 2, 4) LED NUMBER 1 2 3 LED STATUS GOOD NG GOOD NG OUTn ON ON OFF OFF DETECTION RESULT GOOD NG GOOD GOOD LED NUMBER 1 2 3 4 LED STATUS GOOD NG GOOD NG XDOWN 4 LOW (by case 2) OUTn OFF OFF OFF OFF DETECTION RESULT GOOD GOOD GOOD GOOD XDOWN2 HIGH–IMPEDANCE noise reduction : output slope When output current is 80 mA, the time to change constant current output to turn-on and turn-off is approximately 150 ns and 250 ns respectively. This allows to reduce concurrent switching noise occurred when multiple outputs turn or off at the same time. thermal pad The thermal pad should be connected to GND to eliminate the noise influence since it is connected to the bottom side of IC chip. Also, desired thermal effect will be obtained by connecting this pad to the PCB pattern with better thermal conductivity. POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 9 TLC5921 LED DRIVER SLLS390 – SEPTEMBER 1999 PRINCIPLES OF OPERATION 3.9 3.2 2.0 1.48 0 Output Voltage (Constant Current) – V PD – Total Power Dissipation – W power rating – free-air temperature 0 –20 0 25 85 TA – Free–Air Temperature – °C NOTES: A. The data is based on simulation result. When TI recommended print circuit board is used, derate linearly at the rate of 31.4 mW/°C for operation above 25°C free-air temperature. VCC=5 V, IO(LC) = 80 mA, ICC is typical value. B. The thermal impedance will be varied depend on mounting conditions. Since PZP package established low thermal impedance by radiating heat from thermal pad, the thermal pad should be soldered to pattern with low thermal impedance. C. The material for PCB should be selected considering the thermal characteristics since the temperature will rise around the thermal pad. Figure 4. Power Rating 10 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 TLC5921 LED DRIVER SLLS390 – SEPTEMBER 1999 PRINCIPLES OF OPERATION constant output current 100000 R(ref) – Reference Resistance – ( Ω ) 66000 13200 10000 6000 2750 1800 1300 1040 1000 860 730 640 100 0 10 20 30 40 50 60 70 80 Ilkg – Input Leakage Current – (mA) Conditions : VO = 1 V, Vref = 1.3 V NOTE: The resistor, R(IREF), should be located as close to IREF terminal as possible to avoid the noise influence. Figure 5. Current on Constant Current Output vs External Resistor POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 11 tsu (SIN–SCLK) SD01_B SD02_B SD14_B SD15_B SD00_C SD14_C SD15_C SD00_D 1/fSCLK th (SIN–SCLK) SCLK twl (SCLK) th (XLAT–SCLK) twh (SCLK) XLAT POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 tsu (XLAT–SCLK) BLANK SOMODE SOUT ÎÎÎÎ ÎÎÎÎ td (SCLK–SOUT) SD00_A OUTn SD01_A td (SCLK–SOUT) SD02_A SD14_A SD15_A SD00_B td (SCLK–SOUT) SD01_B SD14_B DRIVER ON DRIVER OFF td (BLANK–XDOWN) td (BLANK–XDOWN) XDOWN HI–Z NOTE : LED disconnected Figure 6. Timing Diagram SD00_C td (BLANK–OUTn) td (BLANK–OUTn) DRIVER OFF SD15_B (Note) Template Release Date: 7–11–94 SD00_B TLC5921 LED DRIVER SD15_A SLLS390 – SEPTEMBER 1999 12 SIN PACKAGE OPTION ADDENDUM www.ti.com 19-Oct-2022 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Pins Package Drawing Qty Eco Plan (2) Lead finish/ Ball material MSL Peak Temp Op Temp (°C) Device Marking (3) Samples (4/5) (6) TLC5921DAP ACTIVE HTSSOP DAP 32 46 RoHS & Green NIPDAU Level-3-260C-168 HR -20 to 85 TLC5921 Samples TLC5921DAPR ACTIVE HTSSOP DAP 32 2000 RoHS & Green NIPDAU Level-3-260C-168 HR -20 to 85 TLC5921 Samples (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design. PREVIEW: Device has been announced but is not in production. Samples may or may not be available. OBSOLETE: TI has discontinued the production of the device. (2) RoHS: TI defines "RoHS" to mean semiconductor products that are compliant with the current EU RoHS requirements for all 10 RoHS substances, including the requirement that RoHS substance do not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, "RoHS" products are suitable for use in specified lead-free processes. TI may reference these types of products as "Pb-Free". RoHS Exempt: TI defines "RoHS Exempt" to mean products that contain lead but are compliant with EU RoHS pursuant to a specific EU RoHS exemption. Green: TI defines "Green" to mean the content of Chlorine (Cl) and Bromine (Br) based flame retardants meet JS709B low halogen requirements of