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TL4242 数据表(PDF) 4 Page - Texas Instruments

部件名 TL4242
功能描述  ADJUSTABLE LED DRIVER
Download  14 Pages
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制造商  TI [Texas Instruments]
网页  http://www.ti.com
标志 TI - Texas Instruments

TL4242 数据表(HTML) 4 Page - Texas Instruments

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OUTPUT ELECTRICAL CHARACTERISTICS
PWM INPUT ELECTRICAL CHARACTERISTICS
REFERENCE (REF) ELECTRICAL CHARACTERISTICS
STATUS OUTPUT (ST) ELECTRICAL CHARACTERISTICS
STATUS DELAY (D) ELECTRICAL CHARACTERISTICS
TL4242
SLVS641A – APRIL 2008 – REVISED MAY 2009 .............................................................................................................................................................. www.ti.com
over recommended operating free-air temperature range, VI = 13.5 V, RREF = 0.47 Ω, VPWM,H, TJ = –40°C to 150°C, all
voltages with respect to ground (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
VQ – VREF
(1) = 6.6 V
357
376
395
VQ – VREF = 6.6 V, RREF = 1 Ω
168
177
185
IQ
Output current
mA
VQ – VREF = 6.6 V, RREF = 0.39 Ω
431
454
476
VQ – VREF = 5.4 V to 7.8 V, VI = 9 V to 16 V
357
376
395
IQmax
Output current limit
RREF = 0 Ω
600
mA
Vdr
Drop voltage
IQ = 300 mA
0.35
0.7
V
(1)
VQ – VREF equals the forward voltage sum of the connected LEDs (see Figure 3).
over recommended operating free-air temperature range, VI = 13.5 V, RREF = 0.47 Ω, VPWM,H, TJ = –40°C to 150°C, all
voltages with respect to ground (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
VPWM,
High-level PWM voltage
2.6
V
H
VPWM,
Low-level PWM voltage
0.7
V
L
IPWM,H High-level PWM input current
VPWM = 5 V
220
500
µA
IPWM,L
Low-level PWM input current
VPWM = 0 V
–1
1
µA
tPWM,O
Delay time, turn on
70% of IQnom, See Figure 6
0
15
40
µs
N
tPWM,O
Delay time, turn off
30% of IQnom, See Figure 6
0
15
40
µs
FF
over recommended operating free-air temperature range, VI = 13.5 V, RREF = 0.47 Ω, VPWM,H, TJ = –40°C to 150°C, all
voltages with respect to ground (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
VREF
Reference voltage
RREF = 0.39 Ω to 1 Ω
168
177
185
mV
IREF
Reference input current
VREF = 180 mV
–1
0.1
1
µA
over recommended operating free-air temperature range, VI = 13.5 V, RREF = 0.47 Ω, VPWM,H, TJ = –40°C to 150°C, all
voltages with respect to ground (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
VIQL
Lower status-switching threshold
ST = L
15
25
mV
VIQH
Upper status-switching threshold
ST = H
30
40
mV
VSTL
Low-level status voltage
IST = 1.5 mA
0.4
V
ISTLK
Leakage current
VST = 5 V
5
µA
over recommended operating free-air temperature range, VI = 13.5 V, RREF = 0.47 Ω, VPWM,H, TJ = –40°C to 150°C, all
voltages with respect to ground (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
tSTHL
Delay time, status reaction
CD = 47 nF, ST H→L
6
10
14
ms
tSTLH
Delay time, status release
CD = 47 nF, ST L→H
10
20
µs
4
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Copyright © 2008–2009, Texas Instruments Incorporated


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