KAC3304DU Datasheet, PDF (1/7 Pages) KEC(Korea Electronics) – Analog CMOS Integrated Circuits

SEMICONDUCTOR
TECHNICAL DATA
KAC3304DU
Analog CMOS Integrated Circuits
1X/1. 5X Fractional Charge Pump for
White LED Driver with 32step Dimming Control.
The KAC3304DU is low noise constant frequency charge pump DC/DC
converter specially designed to drive up to four white LEDs on 32step
dimming control. Dual (1x/1.5x) Modes and low dropout voltage of LED
driver maximize efficiency for the white LED application over full Li-ion
battery input range. Various kinds of protection circuits protect your system Pin 1
from every undesirable output condition.
A
Top View
B
C
H
DE
Bottom View
Features
1x/1.5x dual charge pump modes with auto detection.
Excellent Power Efficiency. (more than 92% of P_MAX)
LED current matching of 2%.(Typ.)
Power-down current below 1 A.(max.)
Drives up to 4 LED’s on 32step dimming control.
Up to 22mA/LED current capability. [V_IN > 3.1V]
Up to 15mA/LED current capability. [V_IN > 2.7V]
Strong to ESD. [MM:>200V, HBM:>2000V]
Low input ripple and EMI.
Fast serial dimming control.
2.7V to 5.5V input voltage range.
Output over-voltage protection.
Thermal shutdown protection.
Output over-current protection.
Soft start limits Inrush current.
Automatic soft-start protects IC from output short.
1MHz switching frequency.
Small UDFN-12A Package [3 3mm², t=0.5mm]
Side View
DIM MILLIMETERS
A
3.0 +_ 0.050
B
2.4 +_ 0.030
C
2.250 Ref
D 0.230 +_ 0.030
E 0.45 ^+_ 0.030
F 1.700 +_ 0.030
G 0.42 +_0.050
H 0.300 45
I
Max 0.05
J 0.203 +_ 0.008
K 0.50 +_ 0.050
UDFN-12A
Pin Configuration
Applications
Cellular phones, Smart Phones, PDA, Digital Cameras, Camcorders.
MP3 player and other handheld devices with color displays
Typical operating Circuit
EN
1µF
1µF
L4
EN
C1P
C1N
V_OUT
C2P
L3
L2
L1
GND
V_IN
C2N
1µF
Batt
1µF
L4
EN
C1P
C1N
V_OUT
C2P
L3
L2
L1
GND
V_IN
C2N
KAC3304DU
Top View
L3
L2
L1
GND
V_IN
C2N
Bottom View
L4
EN
C1P
C1N
V_OUT
C2P
2009. 2. 25
Revision No : 3
1/7