2024年4月1日发(作者：毕音韵)
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 (R
SET
) 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
(1MHz) 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 R
SET
pin current, or by applying a
PWM signal on the ENM and ENS pins.
The device is available in a 16−pad TQFN package with a max
height of 0.8 mm.
Features
TQFN−16
HV4 SUFFIX
CASE 510AE
PIN CONNECTIONS
(Note 1)
L
E
D
5
L
E
D
4
L
E
D
3
L
E
D
2
LED6
EN
ENM
ENS
1
LED1
GND
C2+
C2−
C1−
•
•
•
•
•
•
•
•
•
•
•
•
•
•
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
High−frequency 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
16−pad TQFN Package, 0.8 mm Max Height
These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS
Compliant
Cell Phone Main and Sub−display Backlight
Navigation
PDAs
Digital Cameras
R
S
E
T
(4 x 4 mm) (Top View)
MARKING DIAGRAMS
G366
CDBB
G366 = CAT3606HV4−T2
CDBB = CAT3606HV4−GT2
ORDERING INFORMATION
Device
CAT3606HV4−T2
CAT3606HV4−GT2
Package
TQFN−16
(Note 2)
TQFN−16
(Note 3)
Shipping
2,000/
Tape & Reel
Applications
•
•
•
•
“exposed pad” under the package must be
connected to the ground plane on the PCB.
−Tin Plated Finish (RoHS−compliant).
Plated Finish (RoHS−compliant).
© Semiconductor Components Industries, LLC, 2010
January, 2010 − Rev. 3
1
V
O
U
T
Publication Order Number:
CAT3606/D
/
C
1
+
V
I
N
CAT3606
1 mF1 mF
Li−Ion
Battery
+
−
C1+
VIN
C
IN
1 mF
ON/OFF
ENABLE
LED1−4
ENABLE
LED5−6
RSET
24 kW
EN
ENM
ENS
RSET
C1−C2+C2−
VOUT
CAT3606
LED1
LED2
LED3
LED4
LED5
GND
LED6
Main DisplaySub Display
C
OUT
1 mF
20 mA
Figure 1. Typical Application Circuit
Table 1. PIN DESCRIPTION
Pin #
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
PAD
Name
LED6
EN
ENM
ENS
RSET
VOUT
VIN
C1+
C1
C2
C2+
LED1
LED2
LED3
LED4
LED5
GND
LED6 cathode terminal
Enable/shutdown input, active high
Enable “main” input for LED1 to LED4, active low
Enable “sub” input for LED5 and LED6, active low
The LED output current is set by the current sourced out of the RSET pin
Charge pump output connected to the LED anodes
Supply voltage
Bucket capacitor 1 terminal
Bucket capacitor 1 terminal
Bucket capacitor 2 terminal
Bucket capacitor 2 terminal
LED 1 cathode terminal
LED 2 cathode terminal
LED 3 cathode terminal
LED 4 cathode terminal
LED 5 cathode terminal
Ground reference
Function
2
/
2024年4月1日发(作者：毕音韵)
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 (R
SET
) 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
(1MHz) 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 R
SET
pin current, or by applying a
PWM signal on the ENM and ENS pins.
The device is available in a 16−pad TQFN package with a max
height of 0.8 mm.
Features
TQFN−16
HV4 SUFFIX
CASE 510AE
PIN CONNECTIONS
(Note 1)
L
E
D
5
L
E
D
4
L
E
D
3
L
E
D
2
LED6
EN
ENM
ENS
1
LED1
GND
C2+
C2−
C1−
•
•
•
•
•
•
•
•
•
•
•
•
•
•
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
High−frequency 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
16−pad TQFN Package, 0.8 mm Max Height
These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS
Compliant
Cell Phone Main and Sub−display Backlight
Navigation
PDAs
Digital Cameras
R
S
E
T
(4 x 4 mm) (Top View)
MARKING DIAGRAMS
G366
CDBB
G366 = CAT3606HV4−T2
CDBB = CAT3606HV4−GT2
ORDERING INFORMATION
Device
CAT3606HV4−T2
CAT3606HV4−GT2
Package
TQFN−16
(Note 2)
TQFN−16
(Note 3)
Shipping
2,000/
Tape & Reel
Applications
•
•
•
•
“exposed pad” under the package must be
connected to the ground plane on the PCB.
−Tin Plated Finish (RoHS−compliant).
Plated Finish (RoHS−compliant).
© Semiconductor Components Industries, LLC, 2010
January, 2010 − Rev. 3
1
V
O
U
T
Publication Order Number:
CAT3606/D
/
C
1
+
V
I
N
CAT3606
1 mF1 mF
Li−Ion
Battery
+
−
C1+
VIN
C
IN
1 mF
ON/OFF
ENABLE
LED1−4
ENABLE
LED5−6
RSET
24 kW
EN
ENM
ENS
RSET
C1−C2+C2−
VOUT
CAT3606
LED1
LED2
LED3
LED4
LED5
GND
LED6
Main DisplaySub Display
C
OUT
1 mF
20 mA
Figure 1. Typical Application Circuit
Table 1. PIN DESCRIPTION
Pin #
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
PAD
Name
LED6
EN
ENM
ENS
RSET
VOUT
VIN
C1+
C1
C2
C2+
LED1
LED2
LED3
LED4
LED5
GND
LED6 cathode terminal
Enable/shutdown input, active high
Enable “main” input for LED1 to LED4, active low
Enable “sub” input for LED5 and LED6, active low
The LED output current is set by the current sourced out of the RSET pin
Charge pump output connected to the LED anodes
Supply voltage
Bucket capacitor 1 terminal
Bucket capacitor 1 terminal
Bucket capacitor 2 terminal
Bucket capacitor 2 terminal
LED 1 cathode terminal
LED 2 cathode terminal
LED 3 cathode terminal
LED 4 cathode terminal
LED 5 cathode terminal
Ground reference
Function
2
/