TLC5905 Datasheet, PDF (7/27 Pages) Texas Instruments – LED DRIVER

TLC5905
LED DRIVER
SLLS401 – NOVEMBER 1999
Terminal Functions (Continued)
TERMINAL
NAME
NO.
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _VCCANA
30
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _VCCLOG
52
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _VCCLED
26
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _WDCAP
27
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _WDTRG
39
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _XDOWN1
37
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _XDOWN2
36
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _XENABLE
41
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _XLATCH
38
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _XOE
40
I/O
DESCRIPTION
Analog power supply voltage
Logic power supply voltage
LED driver power supply voltage
WDT (watchdog timer) detection time adjustment. WDT detection time is adjusted by
I
connecting a capacitor between WDCAP and GND. When WDCAP is directly connected
to GND, the WDT function is disabled. In this case, WDTRG should be tied to a high or low
level.
WDT (watchdog timer) trigger input. By applying a scan signal to this terminal, the scan
I signal can be monitored by turning the constant current output off and protecting the LED
from damage by burning when the scan signal is stopped during constant period designed.
Shutdown. XDOWN1 is configured as an open collector. It goes low when constant current
O _{output is shut down by the WDT or TSD function.}
OVM comparator output. XDOWN2 is configured as open collector. It monitors terminal
O
voltage when constant current output is turned on. XDOWN2 goes low when this voltage is
lower than the level selected by the OVM latch. When BLANK is set high, the previous level
is held.
I
SCLK enable. When XENABLE is low, data transfer is enabled. Data transfer starts on the
rising edge of SCLK after XENABLE goes low. During XENABLE high, no data is transferred.
Latch. When XLATCH is high, data on shift register goes through latch. When XLATCH is
I low, data is latched. Accordingly, if data on shift register is changed during XLATCH high,
this new value is latched (level latch).
I
Data output enable. When XOE is low, the SOUT terminal is drived. When XOE is high, the
SOUT terminal goes to high-impedance state.
absolute maximum ratings over operating free-air temperature (unless otherwise noted)^†
Logic supply voltage, V_CC(LOG) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.3 V to 7 V
Supply voltage for constant current circuit, V_CC(LED) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.3 V to 7 V
Analog supply voltage, V_CC(ANA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.3 V to 7 V
Output current (DC), I_OL(C) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90 mA
Input voltage range, V_I . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.3 V to V_CC(LOG) + 0.3 V
Output voltage range, V_(SOUT), V_(BOUT) and V_(GSOUT) . . . . . . . . . . . . . . . . . . . – 0.3 V to V_CC(LOG) + 0.3 V
Output voltage range, V_(OUTn) and V_(XDOWNn) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.3 V to 18 V
Storage temperature range, T_stg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 40°C to 125°C
Continuous total power dissipation at (or below) T_A = 25°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.9 W
Power dissipation rating at (or above) T_A = 25°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39.4 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 GNDLOG terminal.
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