TLC5905PAP ,LED Driver W/Shift Registers, Data Latch & Constant Current Circuitry TLC5905 LED DRIVER SLLS401 – NOVEMBER 1999* Drive Capability and Output Counts: * OVM (Output Volt ..
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TLC5905PAP
LED Driver W/Shift Registers, Data Latch & Constant Current Circuitry
(Selectable by MODE Terminal) (Current
Value Setting for All Output Terminals
Using External Resistor and Internal
Brightness Control Register) Constant Current Accuracy ±4% (Maximum
Error Between Bits) Voltage Applied to Constant Current Output
Terminals:
– Minimum 0.4 V (Output Current 5 mA to
40 mA)
– Minimum 0.7 V (Output Current 40 mA to
80 mA) 256 Gray Scale Display:
– Pulse Width Control 256 Steps Brightness Adjustment:
– Output Current Adjustment for 32 Steps
(Adjustment for Brightness Deviation
Between LED Modules)
– 8 Steps Brightness Control by 8 Times
Speed Gray Scale Control Clock
(Brightness Adjustment for Panel) Error Output Signal Check:
– Check Error Output Signal Line Such as
Protection Circuit When Operating Data Output Timing Selectable:
– Select Data Output Timing for Shift
Register Relative to Clock
– Turn Output Off When Scan Signal
Stopped TSD (Thermal Shut Down):
– Turn Output Off When Junction
Temperature Exceeds Limit Data Input:
– Clock Synchronized 1 Bit Serial Input
(Shmitt-Triggered Input) Data Output:
– Clock Synchronized 1 Bit Serial Output
(3-State Output) Input Signal Level:
– CMOS Level Power Supply Voltage... 4.5 V to 5.5 V Maximum Output Voltage... 17 V Data Transfer Rate... 15 MHz (Max Gray Scale Clock Frequency ...8 MHz
(Max) Operating Free-Air Temperature Range
–20°C to 85°C 64-Pin HTQFP Package (PD = 4.9 W,
TA = 25°C)
descriptionThe TLC5905 is a constant current driver that incorporates shift register, data latch, constant current circuitry
with a current value adjustable and 256 gray scale display that uses pulse width control. The output current can
be selected as maximum 80 mA with 16 bits or 120 mA with 8 bit. The current value of the constant current output
is set by one external resistor. After this device is mounted on a printed-circuit board (PCB), the brightness
deviation between LED modules (ICs) can be adjusted using an external data input, and the brightness control
for the panel can be accomplished by the brightness adjustment circuitry. Also, the device incorporates the
output voltage monitor (OVM) used for LED open detection (LOD) by monitoring constant current output.
Moreover, the device incorporates watchdog timer (WDT) circuitry, which turns constant current output off when
the scan signal stops during dynamic scanning operation, and thermal shutdown (TSD) circuitry, which turns
constant current output off when the junction temperature exceeds the limit.
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.
