lm2792ldx-h National Semiconductor Corporation, lm2792ldx-h Datasheet - Page 4

• Manufacturer Part Number: lm2792ldx-h
• Description: Current Regulated Switched Capacitor Led Driver With Analog Brightness Control
• Manufacturer: National Semiconductor Corporation

www.national.com
I
I
V
I
I
I
V
V
I
R
BRGT
I
f
t
DX
DX
D-MATCH
Q
SD
LEAK-SD
SET
SW
START
DX
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 internal thresholds of the Shutdown bar are set at about 40% of V
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
Symbol
V
BRGT, SD
Power Dissipation (Note 2)
T
θ
Storge Temperature
Lead Temp. (Soldering, 5 sec.)
ESD Rating
JA
JMAX
IN
(Note 7)
(Note 2)
Available Current at Output Dx
Line Regulation of Dx Output
Current
Load 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
Brightness Voltage Range
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 +150˚C
HOLD
−0.3 to 6.0V
= 1 µF, V
3.0V ≤ V
V
R
3.0V ≤ V
V
R
V
V
V
R
V
BRGT = 2.75V, V
R
3.0V ≤ V
Load Current
3.0V ≤ V
At 85˚C
3.0V ≤ V
3.0V ≤ V
0V ≤ V
3.0V ≤ V
I
I
(Note 1)
D1
Dx
IN
Dx
SET
Dx
SET
IN
Dx
Dx
SET
D1
SET
400 mW
OUT
55˚C/W
= I
= 90% steady state
+0.2V)
= 3.6V
150˚C
260˚C
≤ 3.6V
≤ 3.6V
= 3.0V
= 4.0V
= V
= 1650Ω V
= 1800Ω V
= 1800Ω V
= 1800Ω
may be shorted to GND for 1sec without damage.
D2
SD
D2
IN
IN
IN
IN
IN
IN
IN
IN
≤ 16mA
≤ V
Conditions
= 3.6V,
≤ 5.8V
≤ 4.4V
≤ 4.4V, Active, No
≤ 5.5V, Shutdown
≤ 5.5V, Note5
≤ 5.5V, Note5
≤ 4.4V
= 3.6V, BRGT pin = 2.75V.
OSC
IN
IN
4
= 2f
BRGT
BRGT
BRGT
IN
Operating Conditions
SW
Human Body Model
Machine Model
Input Voltage (V
BRGT
Ambient Temperature (T
34mAOperating Junction
Temperature
= 3.6V,
.
= 3V
= 2.75V
= 2.75V
0.8* V
IN
14.5
13.5
)
Min
900
0
IN
A
)
I
1100
Dx
16.8
16.1
15.4
0.01
Typ
250
0.3
1.4
0.1
0.3
16
10
/25
0.2* V
1800
Max
17.8
−30˚C to +85˚C
−30˚C to 100˚C
2.7
3.0
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
V