TCA62735AFLG Datasheet, PDF (4/12 Pages) Marktech Corporate – Charge Pump type DC/DC Converter for White LED Driver

TENTATIVE
Constant Current Driver part
(V_IN=2.8V to 4.2V, T_opr=-40 to 85°C, if it is not specified.)
Characteristics
Symbol
Test Condition
Min
R_SET=47kΩ
-
Constant Current Drive Setting I_LED1~4
R_SET=12kΩ
-
R_SET=8.2kΩ
-
ISET Terminal Output Voltage V_SET
R_SET=8.2kΩ
-
Constant Current Between Chs |ILED-LED-ERR|
-
ʵ
A c c u r a c y Between ICs |I_LED-ERR|
-
ʵ
V_IN=3.6V center
Constant Sink Current
Supply Voltage Regulation
|∆I_LED|
V_IN=2.8 to 4.2V
I_OUT=80mA
ʵ
C_IN=2.2µF
O u t p u t l e a k a g e c u r r e n t I_LEAK1~4
EN="H"
ILED1 to4="OFF"
ʵ
TCA62735AFLG
Typ
Max Unit
5.1
-
19.6
-
mA
28
-
0.61
-
V
2.5
ʵ
%
5
ʵ
%
1
ʵ
%
ʵ
1
µA
Reference data

Efficiency vs. IOUT
100
90
80
70
60
50
40
30
20
10
LED V_f=3.3V
0
0 20 40 60 80
IOUT (mA)
VIN = 3.0V
VIN = 3.3V
VIN = 3.6V
VIN = 3.9V
VIN = 4.2V
100 120
Efficiency vs. VIN
100
90
80
70
60
50
40
30
20
10
4LEDs at 20mA LED Vf=3.51V
0
4.3 4.1 3.9 3.7 3.5 3.3 3.1 2.9 2.7
VIN (V)
Quiescent Current vs. VIN
4.0
3.5
3.0
2.5
Quiescent Current vs. IOUT Current
4.0
VIN=2.7V
3.5
VIN=3.6V
VIN=4.3V
3.0
2.5
2.0
2.0
1.5
1.5
1.0
4LEDs at 30mA
0.5
4LEDs at 20mA
4LEDs at 5mA
0.0
2.8 3.0 3.2 3.4 3.6 3.8 4.0 4.2
VIN (V)
1.0
0.5
0.0
20
40
60
80 100 120
IOUT Current (mA)
This datasheet is tentative, the values and contents are subject to change without any notice. 2005-04-26 (Page 4 of 12)