TCA62735AFLG Datasheet, PDF (10/18 Pages) Marktech Corporate – Charge Pump type DC/DC Converter for White LED Driver

TCA62735AFLG
160
140
120
IOUT Current vs. VIN
4LEDs at 30mA
4LEDs at 20mA
4LEDs at 5mA
T_a=25°C
100
80
60
40
20
0
2.8 3.0 3.2 3.4 3.6 3.8 4.0 4.2
VIN (V)
40
35
30
25
20
15
10
5
0
2.8
ILED Current vs. VIN
4LEDs at 30mA
4LEDs at 20mA
4LEDs at 5mA
T_a=25°C
3.0 3.2 3.4 3.6 3.8 4.0 4.2
VIN (V)
1x Mode Transition V oltage vs. ILED Current
4.1
T_a=25°C
4.0
3.9
3.8
3.7
3.6
3.5
3.4
5
LED Vf=3.2V,4c h ON
LED Vf=3.4V,4c h ON
LED Vf=3.6V,4c h ON
10
15
20
25
30
ILED Current (mA )
Evaluation Circuit
R_SET=8.2kΩ~47kΩ
V_IN=2.8V~4.2V
C₁=1.0µF
C_OUT=1.0µF
A
V
C_IN=2.2µF
C₂=1.0µF
C1-
C2-
C2+
GND
CTL2
CTL1
CTL0
EN
V
A
• Evaluation conditions
LED : NACW215 (NICHIA Corp.)
C_IN
: C1608JB1C225K (TDK Corp.)
C_OUT : C1608JB1C105K (TDK Corp.)

C₁
: C1608JB1C105K (TDK Corp.)

C₂
: C1608JB1C105K (TDK Corp.)

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2007-06-21