tk11859f Toko Inc., tk11859f Datasheet - Page 15

• Manufacturer Part Number: tk11859f
• Description: ??LED???? ???DC-DC??????IC????
• Manufacturer: Toko Inc.

13.2 APPLICATION CIRCUIT (4LEDs in Series)
L :
V
IN
=3.0V
90
80
70
60
50
Type DB3018C
Type D310C
Type D3313FB
0
( 4LEDs, Input Voltage 3.0V)
V
IN
5
ON/OFF
Efficiency Curve
LED Current (mA)
4.7µF
C
IN
TOKO Part Number: 1092BS-220M
TOKO Part Number: 1036FB-150M
TOKO Part Number: 1069BS-220M
10
GND
EN
V
V
FB
IN
1
2
3
4
: DB3018C_22uH
: D310C_22uH
: D3313FB_15uH
15
Reference
Voltage
Fig.8: Typical 4 LEDs Application
0.6V
20
0.267V
PWM Comp
Over Current
Detector
GC3-N015
Error Amp
L
Output Drive
Oscillator
Control
V
IN
=4.2V
90
80
70
60
50
0
8
7
6
5
PGND
SW
OVP
EA
( 4LEDs, Input Voltage 4.2V)
OUT
0.1µF
C
EA
5
Efficiency Curve
LED Current (mA)
R
RB551V-30
10
LED
(ROHM)
SBD
I
2.2µF
LED
C
OUT
: DB3018C_22uH
: D310C_22uH
: D3313FB_15uH
15
TK11859F
20
Page 15