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CAT3606 Datasheet

6-Channel Low Noise Charge Pump White LED Driver

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CAT3606
6-Channel Low Noise
Charge Pump White LED
Driver
Description
The CAT3606 controls up to four LEDs for the main display and
two LEDs for the sub-display in cellular phones. The device is capable
of operating in either 1x (LDO) mode or 1.5x charge pump mode. All
LED pin currents are regulated and tightly matched to achieve
uniformity of brightness across the LCD backlight. An external
resistor (RSET) sets the nominal output current.
The device can deliver as much as 20 mA per channel during low
voltage operation (3 V), and 30 mA per channel during nominal
operation (3.3 V). A constant high-frequency switching scheme
(1 MHz) provides low noise and allows the use of very small value
ceramic capacitors.
A “zero” quiescent current mode can be achieved via the chip enable
pin EN. The Main and Sub LEDs each have their own dedicated
ON/OFF control pins ENM, ENS. Dimming can be achieved using
either a DC voltage to control the RSET pin current, or by applying a
PWM signal on the ENM and ENS pins.
The device is available in a 16pad TQFN package with a max
height of 0.8 mm.
Features
Drives up to 4 Main LEDs and 2 Sub LEDs
Separate Control for Main and Sub LEDs
Compatible with Supply Voltage of 3 V to 5.5 V
Power Efficiency up to 90%
Output Current up to 30 mA per LED
Highfrequency Operation at 1 MHz
2 Modes of Operation 1x and 1.5x
White LED Detect Circuitry on All Channels
Shutdown Current less than 1 mA
Small Ceramic Capacitors
Soft Start and Current Limiting
Short Circuit Protection
16pad TQFN Package, 0.8 mm Max Height
These Devices are PbFree, Halogen Free/BFR Free and are RoHS
Compliant
Applications
Cell Phone Main and Subdisplay Backlight
Navigation
PDAs
Digital Cameras
http://onsemi.com
TQFN16
HV4 SUFFIX
CASE 510AE
PIN CONNECTIONS (Note 1)
1
LED6
EN
ENM
ENS
GND
LED1
C2+
C2
C1
(4 x 4 mm) (Top View)
MARKING DIAGRAMS
G366
CDBB
G366 = CAT3606HV4T2
CDBB = CAT3606HV4GT2
ORDERING INFORMATION
Device
CAT3606HV4T2
Package
TQFN16
(Note 2)
CAT3606HV4GT2 TQFN16
(Note 3)
Shipping
2,000/
Tape & Reel
1. The “exposed pad” under the package must be
connected to the ground plane on the PCB.
2. MatteTin Plated Finish (RoHScompliant).
3. NiPdAu Plated Finish (RoHScompliant).
© Semiconductor Components Industries, LLC, 2010
1
January, 2010 Rev. 3
Publication Order Number:
CAT3606/D


  ON Semiconductor Electronic Components Datasheet  

CAT3606 Datasheet

6-Channel Low Noise Charge Pump White LED Driver

No Preview Available !

CAT3606
1 mF
1 mF
LiIon
Battery +
CIN
1 mF
ON/OFF
ENABLE
LED14
ENABLE
LED56
RSET
24 kW
C1+ C1C2+ C2
VIN
VOUT
CAT3606
EN
LED1
ENM
LED2
LED3
ENS
LED4
LED5
RSET
GND LED6
Main Display
Sub Display
COUT
1 mF
20 mA
Figure 1. Typical Application Circuit
Table 1. PIN DESCRIPTION
Pin #
Name
Function
1
LED6
LED6 cathode terminal
2
EN
Enable/shutdown input, active high
3
ENM
Enable “main” input for LED1 to LED4, active low
4
ENS
Enable “sub” input for LED5 and LED6, active low
5
RSET
The LED output current is set by the current sourced out of the RSET pin
6
VOUT
Charge pump output connected to the LED anodes
7
VIN
Supply voltage
8
C1+
Bucket capacitor 1 terminal
9
C1
Bucket capacitor 1 terminal
10
C2
Bucket capacitor 2 terminal
11
C2+
Bucket capacitor 2 terminal
12
LED1
LED 1 cathode terminal
13
LED2
LED 2 cathode terminal
14
LED3
LED 3 cathode terminal
15
LED4
LED 4 cathode terminal
16
LED5
LED 5 cathode terminal
PAD
GND
Ground reference
http://onsemi.com
2


Part Number CAT3606
Description 6-Channel Low Noise Charge Pump White LED Driver
Maker ON Semiconductor
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CAT3606 Datasheet PDF






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