KEC KIB3401, KIB3401F Datasheet
2006. 4. 13 1/6
SEMICONDUCTOR
TECHNICAL DATA
KIB3401F
BICD LINEAR INTEGRATED CIRCUIT
Revision No : 3
White LED Step-Up Converter
The KIB3401F is a monolithic step-up DC/DC converter specifically
designed to drive white LEDs with a constant current from Li-ion cell.
Relative large 320mV feedback voltage & it’s high accuracy help you
setting LED current with a external resistor.
KIB3401F is available in a extremely low profile & small TS-6 package.
A 10 H inductor is sufficient for most application.
FEATURES
Inherently Matched LED Current.
High Efficiency : 85% (max.)
Built in a open circuits protection for the LEDs fail.
Drives Up to four LEDs without external zener diode.
Drives Up to six LEDs with external zener diode.
Built in a N-channel MOSFET Switch.
Fast 1.1MHz(typ.) Switching Frequency.
Uses Tiny 1mm Tall Inductors.
Bulit in Thermal protection.
Wide Dimming control range : 25%~100%.
Extremely low height & small Packaging.
APPLICATIONS
Celluars Phones
PDAs
Digital Cameras
MP3 Players, Color Displays
DIM MILLIMETERS
A
B
D
E
TS6
2.9 0.2
1.6+0.2/-0.1
0.70 0.05
0.4 0.1
2.8+0.2/-0.3
1.9 0.2
0.95
0.16 0.05
0.00-0.10
0.25+0.25/-0.15
C
F
G
H
I
J
K 0.60
L 0.55
A
F
G
G
D
K
K
B
E
C
L
H
J
J
I
2
3
5
16
4
+
_
+
_
+
_
+
_
+
_
Figure1. 4Series White LED Driver in Thin TS6
0
C1, C2 : X5R OR X7R DIELECTRIC
D1 : KEC KDR730E/KDR720E (Low V )
L1 : MURATA LQH32CN100K53L OR EQUIVALENT
GND
SW
L1
C1
ON
Shutdown and
Dimming control
OFF
C2
21.5Ω
R1
KIB3401F
D1
CTL
FB
F
OVD
LED1
LED2
LED3
LED4
LOAD CURRENT (mA)
10
CONVERSION EFFICIENCY
EFFICIENCY (%)
75.00
77.00
79.00
81.00
83.00
85.00
87.00
05 2015 25
3.0V
Vin
3.6V
4.3V
1
2
4
3
6
5
V
CC
4.7 H~10 H
µ
µ
1 F
µ
V
IN
1 F
µ
TYPICAL APPLICATION
Marking
Lot No.
Type Name
401
123
654
2006. 4. 13 2/6
KIB3401F
Revision No : 3
CHARATERISTICS SYMBOL RATING UNIT
Input Voltage
V
CC
-0.3 ~ 6.0 V
Switching pin Voltage
V
SW
-0.3 ~ 22 V
OVD pin Voltage
V
OVD
-0.3 ~ 22 V
Operating temperature range Topr -40 ~ 85
Storage temperature range Tstg -40 ~ 150
Maximum Junction temperature Tj 150
CHARATERISTICS SYMBOL CONDITION MIN. TYP. MAX. UNIT
Input Voltage
V
CC
- 2.8 - 5.5 V
CTL pin voltage for full LED current
V
CTL
H
VCC=3.0V
2.7 - - V
CTL pin voltage to shutdown chip
V
CTL
L
- - 0.5 V
CTL pin input pulse width
t
PW(CTL)
Both Positive and Negative pulse 33 - -
LED Current IF
VCC=3.6V, R
SENSE
=16 ,
Topr =25
, Four LED
- 20 -
CTL Response Delay
(When Power ON.)
TpdCTL
- 2 - -
MAXIMUM RATINGS (Ta=25 )
RECOMMENDED OPERATING CONDITIONS (T
opr
=-40~85 )
One Shot
One Shot
SW
OUT
OUT
OVD
VRef
Vth
320mV
FB(Rsense)
GND
CTL
ADC
+
-
OUT
+
-
+
-
+
_
+
-
+
_
+
-
+
-
+
-
2
3
6
4
1
5
V
CC
BLOCK DIAGRAM
figure 2. KIB3401F Block Diagram
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