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| TLC5928_16 Datasheet, PDF (5/32 Pages) Texas Instruments – 16-Channel, Constant-Current LED Driver with LED Open Detection | |||
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TLC5928
www.ti.com
SBVS120E â JULY 2008 â REVISED JANUARY 2011
SWITCHING CHARACTERISTICS
At VCC = 3.0 V to 5.5 V, TA = â40°C to +85°C, CL = 15 pF, RL = 130 â¦, RIREF = 1.5 kâ¦, and VLED = 5.5 V. Typical values at
VCC = 3.3 V and TA = +25°C, unless otherwise noted.
TLC5928
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX UNIT
tR0
Rise time
tR1
SOUT (see Figure 5)
OUTn (see Figure 4)
tF0
Fall time
tF1
SOUT (see Figure 5)
OUTn (see Figure 4)
tD0
SCLKâ to SOUT
tD1
Propagation delay time
LATâ or BLANKâ to OUTn sink current on
(see Figure 10)
5
15 ns
10
30 ns
5
15 ns
10
30 ns
8
20 ns
12
30 ns
tD2
LATâ or BLANKâ to OUTn sink current off
(see Figure 10)
12
30 ns
tON_ERR Output on-time error(1)
On/off latch data = all '1', 20 ns BLANK low level
one-shot pulse input (see Figure 4)
â8
+8 ns
(1) Output on-time error (tON_ERR) is calculated by the formula: tON_ERR (ns) = tOUT_ON â BLANK low level one-shot pulse width (TWL2).
tOUT_ON indicates the actual on-time of the constant-current driver.
FUNCTIONAL BLOCK DIAGRAM
VCC
SIN
SCLK
VCC
LAT
BLANK
IREF
GND
Thermal
Detection
GND
LSB
MSB
On/Off Control Shift Register
(1 Bit x 16 Channels)
0
15
16
LSB
MSB
16
On/Off Control Data Latch
(1 Bit x 16 Channels)
0
16
15
SID Latch
16-Channel Constant Current Sink Driver
16
SOUT
16-Channel LED Open Detection
OUT0 OUT1
¼
OUT14 OUT15
© 2008â2011, Texas Instruments Incorporated
Product Folder Link(s): TLC5928
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