KAC3305DN Datasheet, PDF (1/6 Pages) KEC(Korea Electronics) – Analog CMOS Integrated Circuits

SEMICONDUCTOR
TECHNICAL DATA
700mA White LED Regulating Charge Pump for
Camera Flashes and Movie Lights
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.
Features
Up to 700mA Output Drive Capability
Current Regulation for Flash
2.7V to 5.5V Supply voltage Range
PWM Dimming Control
Soft-Start Limits Inrush current
Over Voltage Protection on Output
Low Shutdown Current
Thermal Shutdown Protection
KAC3305DN
Analog CMOS Integrated Circuits
D
G
5
8
A
Top View
Side View
4
1
E
B
Bottom View
DIM
A
B
C
D
E
F
G
H
I
J
MILLIMETERS
3.0 +_ 0.1
2.3+_ 0.05
1.6 +_ 0.05
1.950 Ref
0.3 +_ 0.05
0.4+_ 0.05
0.65
0.75+_ 0.05
0.203+_ 0.008
0.0 ~ 0.05
TDFN-8
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
1µF
2.7V to 5.5V
10µF
OFF ON
CP
V_IN
CN
V_OUT
GND
KAC3305DN
EN
FB
Rs
4.7µF
Pin Configuration
EN1 ₁
CP
CN
EN2 ₄
TDFN-8
TOP VIEW
8 V_OUT
FB
V_IN
5 GND
2007. 8. 22
Revision No : 1
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