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LM2792LD-H Datasheet(PDF) 4 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
No. de pieza LM2792LD-H
Descripción Electrónicos  Current Regulated Switched Capacitor LED Driver with Analog Brightness Control
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Fabricante Electrónico  NSC [National Semiconductor (TI)]
Página de inicio  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM2792LD-H Datasheet(HTML) 4 Page - National Semiconductor (TI)

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Absolute Maximum Ratings (Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
V
IN
−0.3 to 6.0V
BRGT, SD
−0.3 to (V
IN +0.2V)
Power Dissipation (Note 2)
400 mW
T
JMAX (Note 2)
150˚C
θ
JA (Note 7)
55˚C/W
Storge Temperature
−65˚C to +150˚C
Lead Temp. (Soldering, 5 sec.)
260˚C
ESD Rating
Human Body Model
2KV
Machine Model
200V
Operating Conditions
Input Voltage (V
IN)
3.0V to 5.8V
BRGT
0 to 3.0V
Ambient Temperature (T
A)
−30˚C to +85˚C
34mAOperating Junction
Temperature
−30˚C to 100˚C
Electrical Characteristics
Limits in standard typeface are for T
J = 25˚C and limits in boldface type apply over the full Operating Temperature Range.
Unless otherwise specified, C
1 =CIN =CHOLD = 1 µF, VIN = 3.6V, BRGT pin = 2.75V.
Symbol
Parameter
Conditions
Min
Typ
Max
Units
I
DX
Available Current at Output Dx
3.0V
≤ V
IN
≤ 5.8V
V
Dx
≤ 3.6V
R
SET = 1650
Ω V
BRGT =3V
14.5
16.8
mA
I
DX
Line Regulation of Dx Output
Current
3.0V
≤ V
IN
≤ 4.4V
V
Dx
≤ 3.6V
R
SET = 1800
Ω V
BRGT = 2.75V
13.5
16
17.8
mA
V
DX
Load Regulation of Dx Output
Current
V
IN = 3.6V
V
Dx = 3.0V
V
Dx = 4.0V
R
SET = 1800
Ω V
BRGT = 2.75V
16.1
15.4
mA
I
D-MATCH
Current Matching Between Any
Two Outputs
V
D1 =VD2 = 3.6V,
BRGT = 2.75V, V
IN = 3.6V,
R
SET = 1800
0.3
%
I
Q
Quiescent Supply Current
3.0V
≤ V
IN
≤ 4.4V, Active, No
Load Current
1.4
2.7
mA
I
SD
Shutdown Supply Current
3.0V
≤ V
IN
≤ 5.5V, Shutdown
At 85˚C
0.1
0.3
1µA
V
IH
SD Input Logic High
3.0V
≤ V
IN
≤ 5.5V, Note5
0.8* V
IN
V
V
IL
SD Input Logic Low
3.0V
≤ V
IN
≤ 5.5V, Note5
0.2* V
IN
V
I
LEAK-SD
SD Input Leakage Current
0V
≤ V
SD
≤ V
IN
0.01
µA
R
BRGT
BRGT Input Resistance
250
k
BRGT
Brightness Voltage Range
0
3.0
V
I
SET
I
SET Pin Output Current
I
Dx/25
mA
f
SW
Switching Frequency (Note 4)
3.0V
≤ V
IN
≤ 4.4V
I
D1 =ID2
≤ 16mA
900
1100
1800
kHz
t
START
Startup Time (Note 6)
I
Dx = 90% steady state
10
µs
Note 1: Absolute maximum ratings indicate limits beyond which damage to the device may occur. Electrical specifications do not apply when operating the device
beyond its rated operating conditions.
Note 2: D1 and D2 may be shorted to GND without damage. POUT may be shorted to GND for 1sec without damage.
Note 3: In the test circuit, all capacitors are 1.0µF, 0.3
Ω maximum ESR capacitors. Capacitors with higher ESR will increase output resistance, reduce output
voltage and efficiency.
Note 4: The output switches operate at one half of the oscillator frequency, fOSC =2fSW.
Note 5: The internal thresholds of the Shutdown bar are set at about 40% of VIN
Note 6: This electrical specification is quarantee by design
Note 7: For more information regarding the LLP package, please refer to National Semiconductor Application note AN1187
www.national.com
4


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