LM2791LD-L/NOPB National Semiconductor, LM2791LD-L/NOPB Datasheet - Page 4

• Manufacturer Part Number: LM2791LD-L/NOPB
• Description: IC LED DRIVR WHITE BCKLGT 10-LLP
• Manufacturer: National Semiconductor
• Type: Backlight, White LEDr

Specifications of LM2791LD-L/NOPB

• Constant Current: Yes
• Topology: PWM, Switched Capacitor (Charge Pump)
• Number Of Outputs: 2
• Internal Driver: Yes
• Type - Primary: Backlight
• Type - Secondary: White LED
• Frequency: 450kHz ~ 850kHz
• Voltage - Supply: 3 V ~ 5.8 V
• Mounting Type: Surface Mount
• Package / Case: 10-LLP
• Operating Temperature: -30°C ~ 85°C
• Current - Output / Channel: 36mA
• Internal Switch(s): Yes
• Operating Supply Voltage (typ): 3.3/5V
• Number Of Segments: 2
• Operating Temperature (min): -30C
• Operating Temperature (max): 85C
• Operating Temperature Classification: Commercial
• Package Type: LLP EP
• Pin Count: 10
• Mounting: Surface Mount
• Power Dissipation: 400mW
• Operating Supply Voltage (min): 3V
• Operating Supply Voltage (max): 5.8V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Output: -
• Efficiency: -
• Lead Free Status / Rohs Status: Compliant
• Other names: LM2791LD-L; LM2791LD-LTR

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I
I
I
I
I
I
V
V
I
R
I
f
t
DX
Dx
DX
D-MATCH
Q
SD
LEAK-SD
SET
SW
START
IH
IL
BRGT
Absolute Maximum Ratings
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Electrical Characteristics
Limits in standard typeface are for T
Unless otherwise specified, C
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. P
Note 3: In the test circuit, all capacitors are 1.0µF, 0.3Ω 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, f
Note 5: The interanl thresholds of the shutdown bar are set at about 40% of V
Note 6: This electrical specification is guaranteed by design.
Note 7: For more inforamtion regarding the LLP package, please refer to National Semiconductor Application note AN1187
Symbol
V
BRGT, SD
Power Dissipation(Note 2)
T
θ
Storge Temperature
Lead Temp. (Soldering, 5 sec.)
JA
JMAX
IN
(Note 7)
(Note 2)
Diode Current at ID1,2
Available Current at Output Dx
Load Regulation at Output Dx
Line Regulation of Dx Output
Current
Current Matching Between Any
Two Outputs
Quiescent Supply Current
Shutdown Supply Current
SD Input Logic High
SD Input Logic Low
SD Input Leakage Current
BRGT Input Resistance
I
Switching Frequency (Note 4)
Startup Time(Note 6)
SET
Pin Output Current
Parameter
1
= C
IN
J
= C
= 25˚C and limits in boldface type apply over the full Operating Temperature Range.
-0.3 to (V
−65˚C to +100˚C
HOLD
= 1 µF, V
−0.3 to 6V
V
V
V
V
V
V
V
V
3.3V ≤ V
V
3.0V ≤ V
V
3.0V ≤ V
Load Current
3.0V ≤ V
85˚C
3.0V ≤ V
3.0V ≤ V
0V ≤ V
3.0V ≤ V
I
(Note 1)
Dx
IN
IN
IN
IN
IN
IN
IN
DX
DX
DX
D1
400 mW
OUT
55˚C/W
= 3V, R
= 3V
= 3.3V
= 3.6V
= 90% steady state
+0.2V)
, V
= 4.4V
=3.6V
=3.0V
=4.0V
150˚C
260˚C
= 3.6V
may be shorted to GND for 1sec without damage.
D2
SD
IN
IN
IN
IN
IN
IN
IN
IN
= 3.6V
≤ V
Conditions
SET
≤ 4.4V
≤ 4.4V
≤ 4.4V, Active, No
≤ 5.5V, Shutdown at
≤ 5.5V, (Note 5)
≤ 5.5V, (Note 5)
≤ 4.4V
= 3.6V, V
OSC
IN
IN
4
= 270Ω
.
= 2f
Operating Conditions
SW
ESD Rating
Human Body Model
Machine Model
Input Voltage (V
BRGT
Ambient Temperature (T
Junction Temperature (T
DIODE
.
= 3.6V, R
IN
0.8V
SET
16.5
12.8
13.3
)
Min
450
= 332Ω, BRGT pin = 0V.
IN
A
J
)
)
I
Dx
14.5
15.1
15.7
16.8
15.4
15.7
Typ
250
650
0.3
0.7
0.1
0.3
0.1
18
16
10
/25
0.2V
−30˚C to +100˚C
Max
17.7
18.4
−30˚C to +85˚C
850
2
1
3.0V to 5.8V
IN
0 to 3.0V
200V
Units
2KV
kHz
mA
mA
mA
mA
mA
µA
µA
kΩ
µs
%
V
V