TLC5921_17 Datasheet, PDF (4/18 Pages) Texas Instruments – LED DRIVER

TLC5921
LED DRIVER
SLLS390 – SEPTEMBER 1999
Terminal Functions
TERMINAL
NAME
NO.
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _SIN
5
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _SOUT
28
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _SCLK
4
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _XLAT
3
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _SOMODE
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _{OUT0 – OUT15}
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _BLANK
30
7,8,10,11,12,13,
15,16,17,18,20,
21,22,23,25,26
2
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _IREF
31
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _XDOWN
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _VCC
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ GND
PGND
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _{THERMAL PAD}
29
32
1
6,9,14,19,24,27
package bottom
I/O
DESCRIPTION
I 1 bit serial data input
O 1 bit serial data output
Clock input for data transfer. All the data in the shift register is shifted to MSB by 1 bit
I synchronizing to the rising edge of SCLK, and data at SIN is shifted to LSB at the same time.
(Schmitt buffer input)
Latch. When XLAT is high, data on shift register goes through latch. When XLAT is low, data
I 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.
Timing select for serial data output. When SOMODE is low, output data on SOUT is changed
I synchronizing to the rising edge of SCLK. When SOMODE is high, output data on SOUT
is changed synchronizing to the falling edge of SCLK.
O Constant current output.
Blank(Light off). When BLANK is high, all the output of constant current driver is turned off.
I 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.
Constant current value setting. LED current is set to desired value by connecting external
I resistor between IREF and GND. The 38 times current compared to current across external
resistor sink on output terminal.
O
Error output. XDOWN is configured as open collector. It goes low when TSD or LOD
functions.
Power supply voltage
Ground
Ground for LED driver. (Internally connected to GND)
Heat sink pad. This pad is connected to the lowest potential to IC or thermal layer.
absolute maximum ratings (see Note 1)^†
Supply voltage, V_CC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.3 V to 7 V
Output current (dc), I_O(LC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90 mA
Input voltage range, V_I . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.3 V to V_CC + 0.3 V
Output voltage range, V_O(SOUT), V_O(XDOWN) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.3 V to V_CC + 0.3 V
Output voltage range, V_O(OUTn) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.3 V to 18 V
Storage temperature range, T_stg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 40°C to 150°C
Continuous total power dissipation at (or below) T_A = 25°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.9 W
Power dissipation rating at (or above) T_A = 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
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