SEMICONDUCTOR
KAC3305DN
Analog CMOS Integrated Circuits
TECHNICAL DATA
700mA White LED Regulating Charge Pump for
Camera Flashes and Movie Lights
D
G
5
8
The KAC3305DN is charge pumps drive white LEDs, including camera
strobes, with regulated current up to 700mA. The very low open-loop
output resistance allows high flash brightness, even from a low battery
input voltage. The adaptive 1 /2 regulating charge pump operation
provides high efficiency while in movie mode or backlighting. Fast
switching allows the use of tiny external components. The KAC3305DN
use an external resistor to set the full-scale LED current.
4
1
E
A
B
Top View
Bottom View
DIM
A
B
MILLIMETERS
_
3.0 0.1
+
_
+
2.3 0.05
_
C
1.6 0.05
+
D
E
1.950 Ref
_
+
0.3 0.05
Features
_
+
0.4
0.05
F
Up to 700mA Output Drive Capability
Current Regulation for Flash
2.7V to 5.5V Supply voltage Range
PWM Dimming Control
Side View
G
H
I
0.65
_
+
0.75 0.05
_
0.203 0.008
0.0 ~ 0.05
+
J
Soft-Start Limits Inrush current
Over Voltage Protection on Output
Low Shutdown Current
TDFN-8
Thermal Shutdown Protection
Applications
White LED Flashes Strobes, and Movie Lights LCD Backlighting
Camera Phones, Cell Phones, and Smart Phones, PDAs, Digital Cameras, and camcorders
Generic Lighting Flash, and Strobo applications
Typical operating Circuit
Pin Configuration
1µF
CN
V
CP
VOUT
EN1
1
Rs
8
5
2.7V to 5.5V
V
OUT
IN
FB
CP
TDFN-8
TOP VIEW
10µF
4.7µF
VIN
CN
GND
KAC3305DN
EN2
GND
4
FB
EN
OFF ON
2007. 8. 22
Revision No : 1
1/6
KEC [ KEC(KOREA ELECTRONICS) ]
