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LM27964SQX-I Datenblatt(PDF) 3 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Teilenummer LM27964SQX-I
Bauteilbeschribung  White LED Driver System with I2C Compatible Brightness Control
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Hersteller  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM27964SQX-I Datenblatt(HTML) 3 Page - National Semiconductor (TI)

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Absolute Maximum Ratings (Notes 1, 2)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
V
IN pin voltage
-0.3V to 6.0V
SCL, SDIO, VIO pin voltages
-0.3V to (V
IN+0.3V)
w/ 6.0V max
I
Dxx Pin Voltages
-0.3V to
(V
POUT+0.3V)
w/ 6.0V max
Continuous Power Dissipation
(Note 3)
Internally Limited
Junction Temperature (T
J-MAX)
150oC
Storage Temperature Range
-65oC to +150o C
Maximum Lead Temperature
(Soldering)
(Note 4)
ESD Rating (Note 5)
Human Body Model - I
Dxx Pins:
Human Body Model - All other
Pins:
1.0kV
2.0kV
Operating Rating (Notes 1, 2)
Input Voltage Range
2.7V to 5.5V
LED Voltage Range
2.0V to 4.0V
Junction Temperature (T
J) Range
-30˚C to +100˚C
Ambient Temperature (T
A)
Range(Note 6)
-30˚C to +85˚C
Thermal Properties
Juntion-to-Ambient Thermal
Resistance (
θ
JA), SQA24A Package
(Note 7)
41.3˚C/W
Electrical Characteristics (Notes 2, 8)
Limits in standard typeface are for T
J = 25˚C, and limits in boldface type apply over the full operating temperature range. Un-
less otherwise specified: V
IN = 3.6V; VDxA = 0.4V; VDxB = 0.4V; VDKEY = 0.4V; RSETA =RSETB =RSETK = 16.9k
Ω; BankA,
BankB, and DKEY = Fullscale Current; ENA, ENB, ENK Bits = “1”; C1=C2=1.0µF, C
IN=COUT=2.2µF; Specifications related to
output current(s) and current setting pins (I
Dxx and ISETx) apply to BankA, BankB and DKEY. (Note 9)
Symbol
Parameter
Condition
Min
Typ
Max
Units
I
Dxx
Output Current Regulation
BankA or BankB Enabled
3.0V
≤ V
IN
≤ 5.5V
BankA or BankB Full-Scale
ENA or ENB = "1", ENK = “0”
13.77
(-10%)
15.3
16.83
(+10%)
mA
(%)
3.0V
≤ V
IN
≤ 5.5V
BankA or BankB Half-Scale
ENA or ENB = "1", ENK = “0”
7.5
mA
2.7V
≤ V
IN
≤ 3.0V
BankA or BankB Full-Scale
ENA or ENB = "1", ENK = “0”
15
mA
Output Current Regulation
Keypad Driver Enabled
3.0V
≤ V
IN
≤ 5.5V
DKEY Full-Scale
ENA = ENB = “0”, ENK = “1”
52.8
(-12%)
60
67.2
(+12%)
mA
(%)
Output Current Regulation
BankA and DKEY Enabled
(Note 10)
3.2V
≤ V
IN
≤ 5.5V
R
SETA = 8.3k
Ω,R
SETK = 16.9k
V
LED = 3.6V
BankA and DKEY Full-Scale
ENA = ENK = “1”, ENB = “0”
30
DxA
mA
60
DKEY
R
OUT
Open-Loop Charge Pump Output
Resistance
Gain = 3/2
2.75
Gain = 1
1
V
DxTH
V
Dxx 1x to 3/2x Gain Transition
Threshold
V
DxA and/or VDxB Falling
375
mV
www.national.com
3


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