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TLC5944 Datasheet(PDF) 5 Page - Texas Instruments

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Part No. TLC5944
Description  16-Channel, 12-Bit PWM LED Driver with 6-Bit Dot Correction and Pre-Charge FET
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Maker  TI [Texas Instruments]
Homepage  http://www.ti.com
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TLC5944 Datasheet(HTML) 5 Page - Texas Instruments

 
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100
3V
1V
-
´
(I
atV
=1V)
OUTn
OUTn
(I
atV
=3V)
(I
atV
=1V)
-
OUTn
OUTn
OUTn
OUTn
D
(%/V)=
SWITCHING CHARACTERISTICS
TLC5944
www.ti.com ...................................................................................................................................................................................................... SBVS112 – JUNE 2008
ELECTRICAL CHARACTERISTICS (continued)
At VCC = 3.0 V to 5.5 V and TA = –40°C to +85°C. Typical values at VCC = 3.3 V and TA = +25°C, unless otherwise noted.
TLC5944
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
All OUTn = ON, DCn = 3Fh, VOUTn = 1 V to 3 V,
ΔIO(LC3)
Load regulation(4)
±1
±3
%/V
RIREF = 820 Ω, at OUT0 to OUT15
VUP = 3 V, VOUTn = 1 V, BLANK = high,
RPCHG
Pre-charge FET on-resistance
1
3
k
OUT0 to OUT15
T(TEF)
Thermal error flag threshold
Junction temperature(5)
+150
+162
+175
°C
T(HYST)
Thermal error flag hysteresis
Junction temperature(5)
+5
+10
+20
°C
T(PTW)
Pre-thermal warning threshold
Junction temperature(5)
+105
+120
+135
°C
T(HYSP)
Pre-thermal warning hysteresis
Junction temperature(5)
+5
+10
+20
°C
VLOD
LED open detection threshold
All OUTn = ON
0.2
0.3
0.4
V
VIREF
Reference voltage output
RIREF = 820 Ω
1.16
1.20
1.24
V
(4)
Load regulation is calculated by the equation:
(5)
Not tested. Specified by design.
At VCC = 3.0 V to 5.5 V, TA = –40°C to +85°C, CL = 15 pF, RL = 68 Ω, RIREF = 820 Ω, VLED = 5.0 V, and VUP = 5.0 V. Typical
values at VCC = 3.3 V and TA = +25°C, unless otherwise noted.
TLC5944
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
tR0
SOUT (see Figure 6)
16
Rise time
ns
tR1
OUTn, DCn = 3Fh (see Figure 5)
10
30
tF0
SOUT (see Figure 6)
16
ns
tF1
OUTn, DCn = 3Fh (see Figure 5)
10
30
Fall time
XERR, CL XERR = 100 pF, RL XERR = 1 kΩ,
tF2
50
ns
VXERR = 5 V (see Figure 7)
tD0
SCLK
↑ to SOUT
25
ns
tD1
DCSEL to SOUT
25
ns
tD2
BLANK
↑ to OUT0 sink current off
20
40
ns
tD3
GSCLK
↑ to OUT0/4/8/12
5
18
40
ns
tD4
GSCLK
↑ to OUT1/5/9/13
20
42
73
ns
Propagation delay time
tD5
GSCLK
↑ to OUT2/6/10/14
35
66
106
ns
tD6
GSCLK
↑ to OUT3/7/11/15
50
90
140
ns
tD7
XLAT
↑ to IOUT (dot correction)
50
ns
BLANK
↑ to pre-charge FET on, RL PRE = 10 kΩ,
tD8
10
35
130
ns
constant current driver off (see Figure 8)
tON_ERR
Output on-time error(1)
GSn = 001h, GSCLK = 33 MHz
–20
10
ns
(1)
Output on-time error is calculated by the following formula: TON_ERR (ns) = tOUTON – TGSCLK. tOUTON is the actual on-time of the constant
current driver. TGSCLK is the period of GSCLK.
Copyright © 2008, Texas Instruments Incorporated
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