lm2756tmx National Semiconductor Corporation, lm2756tmx Datasheet - Page 3

• Manufacturer Part Number: lm2756tmx
• Description: Multi-display Inductorless Led Driver With 32 Exponential Dimming Steps In ?smd
• Manufacturer: National Semiconductor Corporation

I
I
MATCH
V
V
R
I
Dxx
Dxx-
Q
Symbol
DxTH
HR
OUT
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
otherwise specified: V
Current; ENA, ENB, ENC Bits = “1”; SD53, SD62, 53A, 62A Bits = "0"; C1 = C2 = C
output current(s) and current setting pins (I
V
SCL, SDIO, HWEN pin voltages
I
Continuous Power Dissipation
(Note 3)
Junction Temperature (T
Storage Temperature Range
Maximum Lead Temperature
(Soldering)
ESD Rating(Note 5)
Human Body Model
Dxx
IN
pin voltage
Pin Voltages
Output Current Regulation
GroupA
Output Current Regulation
GroupB
Output Current Regulation
IDC
Maximum Diode Current per Dxx
Output(Note 10)
Output Current Regulation
GroupA, GroupB, and GroupC
Enabled
(Note 10)
LED Current Matching(Note 11)
V
Threshold
Current sink Headroom Voltage
Requirement
(Note 12)
Open-Loop Charge Pump Output
Resistance
Quiescent Supply Current
Dxx
1x to 3/2x Gain Transition
IN
Parameter
= 3.6V; V
J-MAX
)
HWEN
J
= 25°C, and limits in boldface type apply over the full operating temperature range. Unless
-0.3V to (V
= V
-0.3V to (V
Internally Limited
-65°C to +150° C
IN
Dxx
; V
(Notes 2, 8)
-0.3V to 6.0V
and I
DxA
w/ 6.0V max
w/ 6.0V max
(Notes 1, 2)
2.7V
ENA = '1', 53A = 62A = '0'', ENB = ENC = '0'
4 LEDs in GroupA
2.7V
ENA = '1', 53A = 62A = '1', ENB = ENC = '0'
6 LEDs in GroupA
2.7V
ENB = '1', 53A = 62A = '0', ENA = ENC = '0'
3 LEDs in GroupB
2.7V
ENC = '1', ENA = ENB = '0'
R
3.2V
V
R
2.7V
V
I
(I
Gain = 3/2
Gain = 1
Gain = 1.5x, No Load
VOUT
Dxx
Dxx
LED
DxA
SET
SET
= V
IN
SET
(Note 4)
= 95% ×I
+0.3V)
+0.3V)
(nom)
150°C
≤
≤
≤
≤
≤
= 3.6V
≤
and/or V
= 8.33kΩ
= 10.5kΩ
2.0kV
DxB
) apply to GroupA and GroupB. (Note 9)
V
V
V
V
V
V
IN
IN
IN
IN
IN
IN
= V
≤
≤
≤
≤
≤
≤
≈
DxC
Dxx
5.5V
5.5V
5.5V
5.5V
5.5V
5.5V
20mA)
DxB
3
(nom.)
= 0.4V; R
Condition
Falling
Operating Rating
(Notes 1, 2)
Thermal Properties
ESD Caution Notice
recommends that all integrated circuits be handled with
appropriate ESD precautions. Failure to observe proper ESD
handling techniques can result in damage to the device.
Input Voltage Range
LED Voltage Range
Junction Temperature (T
Ambient Temperature (T
(Note 6)
Junction-to-Ambient Thermal
Resistance (θ
TMD20 Package
(Note 7)
GroupA (4 LEDs)
GroupA (6 LEDs)
GroupB (3 LEDs)
SET
= 11.8kΩ; GroupA = GroupB = GroupC = Fullscale
JA
IN
),
= C
OUT
= 1.0µF; Specifications related to
A
J
(-8.5%)
(-7.5%)
) Range
) Range
18.65
18.70
18.40
18.20
(-8%)
(-8%)
Min
National Semiconductor
20.28
20.40
20.00
19.70
22.5
22.5
22.5
DxC
Typ
DxA
DxB
150
0.4
1.0
0.7
2.4
0.9
2.1
30
65
-30°C to +105°C
-30°C to +85°C
(+8.5%)
(+7.5%)
(+8%)
(+8%)
21.90
22.10
21.60
21.20
Max
2.7V to 5.5V
2.0V to 4.0V
1.8
2.7
2.5
2.5
www.national.com
40°C/W
Units
(%)
(%)
(%)
(%)
mA
mA
mA
mA
mA
mA
mV
mV
mA
%
Ω