TL4242QKTTRQ1 Datasheet, PDF (4/21 Pages) Texas Instruments – ADJUSTABLE LED DRIVER

TL4242-Q1
SLVS732E – JULY 2010 – REVISED JULY 2013
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OVERALL DEVICE ELECTRICAL CHARACTERISTICS
over recommended operating free-air temperature range, V_I = 13.5 V, R_REF = 0.47 Ω, V_PWM,H, T_A = –40°C to 105°C (QFN),
T_A = –40°C to 125°C (SFM), all voltages with respect to ground (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN TYP MAX UNIT
I_qL
I_qOFF
Supply current
Supply current, off mode
V_Q = 6.6 V
PWM = L, T_J < 85°C
12
22 mA
0.1
2 μA
OUTPUT ELECTRICAL CHARACTERISTICS
over recommended operating free-air temperature range, V_I = 13.5 V, R_REF = 0.47 Ω, V_PWM,H, T_A = –40°C to 105°C (QFN),
T_A = –40°C to 125°C (SFM), all voltages with respect to ground (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN TYP MAX UNIT
V_Q – V_REF ⁽¹⁾ = 6.6 V
357 376 395
I_Q
Output current
V_Q – V_REF = 6.6 V, R_REF = 1 Ω
V_Q – V_REF = 6.6 V, R_REF = 0.39 Ω
168 177 185
mA
431 454 476
V_Q – V_REF = 5.4 V to 7.8 V, V_I = 9 V to 16 V
357 376 395
I_Qmax Output current limit
R_REF = 0 Ω
600
mA
V_dr
Drop voltage
I_Q = 300 mA
0.35 0.7 V
(1) V_Q – V_REF equals the forward voltage sum of the connected LEDs (see ).
PWM INPUT ELECTRICAL CHARACTERISTICS
over recommended operating free-air temperature range, V_I = 13.5 V, R_REF = 0.47 Ω, V_PWM,H, T_A = –40°C to 105°C (QFN),
T_A = -40°C to 125°C (SFM), all voltages with respect to ground (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN TYP MAX UNIT
V_PWM,H
V_PWM,L
I_PWM,H
I_PWM,L
t_PWM,ON
t_PWM,OFF
High-level PWM voltage
Low-level PWM voltage
High-level PWM input current
Low-level PWM input current
Delay time, turnon
Delay time, turnoff
V_PWM = 5 V
V_PWM = 0 V
70% of I_Qnom, see Figure 8
30% of I_Qnom, see Figure 8
2.6
V
0.7 V
220 500 μA
–1
1 μA
0
15
40 μs
0
15
40 μs
REFERENCE (REF) ELECTRICAL CHARACTERISTICS
over recommended operating free-air temperature range, V_I = 13.5 V, R_REF = 0.47 Ω, V_PWM,H, T_A = –40°C to 105°C (QFN),
T_A = –40°C to 125°C (SFM), all voltages with respect to ground (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN TYP MAX UNIT
V_REF
I_REF
Reference voltage
Reference input current
R_REF = 0.39 Ω to 1 Ω
V_REF = 180 mV
168 177 185 mV
–1 0.1
1 μA
4
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