TLC5970 Datasheet, PDF (7/48 Pages) Texas Instruments – 3-Channel, 12-Bit, PWM LED Driver with Buck DC/DC Converter and Differential Signal Interface

TLC5970
www.ti.com
SBVS140 – MARCH 2010
ELECTRICAL CHARACTERISTICS (continued)
At V_CC = 10 V to 36 V and T_A = –40°C to +85°C. Typical values at V_CC = 24 V, FB = 17 V, and T_A = +25°C, unless otherwise
noted.
TLC5970
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX UNIT
DIFFERENTIAL INTERFACE BLOCK
V_ITP
Positive-going input threshold
voltage
At SDTA-SDTB or SCKA-SCKB pins. Common-mode,
V_IB = 1.5 V (see Figure 4)
V_ITN
Negative-going input threshold
voltage
At SDTA-SDTB or SCKA-SCKB pins. Common-mode,
V_IB = 1.5 V (see Figure 4)
–0.2
V_ITHYS
Hysteresis voltage (|V_ITP – V_ITN|)
Common-mode
30
I_I
At SDTA/SDTB/SCKA/SCKB pins. V_IH = 12 V
(other inputs at 0 V), VCC = 24 V
0.2
V
V
50
110 mV
2
3 mA
I_I1
Input current
I_I2
At SDTA/SDTB/SCKA/SCKB pins. V_IH = 12 V
(other inputs at 0 V), VCC = 0 V
At SDTA/SDTB/SCKA/SCKB pins. V_IH = –7 V
(other inputs at 0 V), VCC = 24 V
2
–3
–1.2
3 mA
mA
I_I3
At SDTA/SDTB/SCKA/SCKB pins. V_IH = –7 V
(other inputs at 0 V), VCC = 0 V
–3
–1
mA
V_OD
ΔV_OD
V_OC
ΔV_OC
R_INT
Differential output voltage
Change in magnitude of differential
output voltage⁽⁵⁾
Steady-state common-mode output
voltage
Change in magnitude of steady-state
common-mode output voltage⁽⁵⁾
Internal resistor between differential
input pair
At SDTY-SDTZ or SCKY-SCKZ pins.
1/2 × RL_DIF = 51 Ω (see Figure 6)
At SDTY-SDTZ or SCKY-SCKZ pins.
1/2 × RL_DIF = 51 Ω (see Figure 6)
At SDTY-SDTZ or SCKY-SCKZ pins.
1/2 × RL_DIF = 51 Ω (see Figure 6)
At SDTY-SDTZ or SCKY-SCKZ pins.
1/2 × RL_DIF = 51 Ω (see Figure 6)
At SDTA-SDTB or SCKA-SCKB pins.
A pins = 0 V, B pins = 1.8 V
1
–0.2
1.5
–0.2
1.8
V_REG/2
10
3
V
0.2
V
3
V
0.2
V
kΩ
At SDTY-SDTZ or SCKY-SCKZ pins. VCC = 0 V,
I_O
Output current with power off
–7 V ≤ SDTY/SDTZ/SCKY/SCKZ ≤ 12 V, 1 pin sweep,
–10
±1
20
µA
all other outputs are open
(5) ΔV_OD and ΔV_OC are the changes in the steady-state magnitude of V_OD and V_OC, respectively, that occur when the output data change
from a high level to a low level.
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