LM2796 Datasheet, PDF (3/8 Pages) National Semiconductor (TI) – Dual-Display White LED Driver with 3/2x Switched Capacitor Boost

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
EN, ENA, ENB pin voltages
Continuous Power Dissipation
(Note 3)
Junction Temperature (T_J-MAX)
Storage Temperature Range
Maximum Lead Temperature
(Soldering, 10 sec.)
ESD Rating (Note 4)Human Body
Model:
Machine Model
-0.3V to 7.1V
-0.3V to (V_IN+0.3V)
w/ 5.6V max
Internally Limited
150^oC
-65^oC to +150^o C
265^oC
2.0kV
200V
Operating Rating (Notes 1, 2)
Input Voltage Range
Junction Temperature (T_J) Range
Ambient Temperature (T_A) Range
(Note 5)
2.7V to 5.5V
-30˚C to +125˚C
-30˚C to +85˚C
Thermal Properties
Juntion-to-Ambient Thermal
Resistance (θ_JA), (Note 6)
100˚C/W
Electrical Characteristics (Notes 2, 7)
Limits in standard typeface and typical values apply for T_J = 25^oC. Limits in boldface type apply over the full operating junction
temperature range (-30˚C ≤ T_J ≤ +85˚C) . Unless otherwise specified: V_IN = 3.6V; V_Dxx = 3.6V; V(EN) = 2.0V; Group A and
Group B LEDs not ON simultaneously (ENA = V_IN and ENB = GND, or ENA = GND and ENB = V_IN); R_SET = 8.35kΩ; C_IN, C₁,
C₂, and C_POUT = 1µF. (Note 8)
Symbol
Parameter
Condition
Min Typ Max Units
Output Current Regulation
I_Dxx
I_Dxx-MATCH Current Matching Between Any
Two Group A Outputs or Group
B Outputs
3.0V ≤ V_IN ≤ 4.2V, and V_IN = 5.5V
2.5V ≤ V_Dxx ≤ 3.8V;
R_SET = 8.35kΩ
3.0V ≤ V_IN ≤ 5.5V;
2.5V ≤ V_Dxx ≤ 3.6V;
R_SET = 6.25kΩ
3.0V ≤ V_IN ≤ 5.5V;
2.5V ≤ V_Dxx ≤ 3.9V;
R_SET = 12.5kΩ
2.7V ≤ V_IN ≤ 3.0V;
2.5V ≤ V_Dxx ≤ 3.3V;
R_SET = 8.35kΩ
ENA and ENB ON (all 7 I_DX outputs active),
V_IN = 3.0V, C_IN = C_OUT = 2.2µF
V_IN = 3.0V (Note 10)
13.8
(-8%)
16.2 mA
15
(+8%) (%)
20
mA
10
mA
15
mA
15
mA
1
%
I_Q
Quiescent Supply Current
2.7V ≤ V_IN ≤ 4.2V;
No Load Current,
EN = ON, ENA = ENB = OFF
3.5
6
mA
I_SD
V_SET
I_Dxx/I_SET
Shutdown Supply Current
I_SET Pin Voltage
Output Current to Current Set
Ratio
2.7V ≤ V_IN ≤ 5.5V, EN = OFF
2.7V ≤ V_IN ≤ 5.5V
3
4.5
µA
1.25
V
100
R_OUT
Charge Pump Output Resistance V_IN = 3.0V
(Note 11)
2.7
Ω
V_HR
Current Source Headroom
I_Dxx = 95% X I_Dxx (nom)
Voltage Requirement (Note 12) R_SET = 8.35kΩ
(I_Dxx (nom) ≈ 15mA)
I_Dxx = 95%X I_Dxx (nom)
R_SET = 12.5kΩ
(I_Dxx (nom) ≈ 10mA)
320
mV
220
3
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