On Semiconductor CAT3649 Evaluation Board CAT3649AGEVB CAT3649AGEVB データシート

製品コード
CAT3649AGEVB
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©  Semiconductor Components Industries, LLC, 2010
November, 2010 − Rev. 2
1
Publication Order Number:
CAT3649/D
CAT3649
6-Channel Quad-Mode
)
 LED
Driver with 32 Dimming
Levels & PWM
Description
The CAT3649 is a high efficiency Quad−Mode
®
 fractional charge
pump that can drive up to six LEDs. The inclusion of a 1.33x fractional
charge pump mode increases the device efficiency by up to 10% over
traditional 1.5x charge pumps with no added external capacitors.
Low noise input ripple is achieved by operating at a constant
switching frequency which allows the use of small external ceramic
capacitors. The multi−fractional charge pump supports a wide range of
input voltages from 2.4 V to 5.5 V.
The LED current can be adjusted in different ways. The full−scale LED
current is set to 25 mA once the device is enabled. Analog dimming in
32 linear steps is achieved via a 1−wire pulse−dimming input (ADIM).
Further adjustment of the LED current can be done by applying a pulse
width modulation (PWM) signal on the PWM input. The PWM
dimming control is compatible with content adaptive brightness control
(CABC) for a wide range of PWM signal frequency up to 200 kHz.
The CAT3649 can be shut down by holding the ADIM or PWM
input in a logic low condition for greater than 30 ms.
ON Semiconductor’s Quad−Mode 1.33x charge pump switching
architecture is patented.
Features
High Efficiency 1.33x Charge Pump
Quad−mode Charge Pump: 1x, 1.33x, 1.5x, 2x
Drives up to 6 LEDs at 25 mA Each
PWM Dimming 100 Hz to 200 kHz for CABC
1−wire EZDim
t 32 Linear Steps (ADIM)
Power Efficiency up to 92%
Low Noise Input Ripple in All Modes
“Zero” Current Shutdown Mode
Soft Start and Current Limiting
Short Circuit Protection
Thermal Shutdown Protection
3 mm x 3 mm, 16−pad TQFN Package
This Device is Pb−Free, Halogen Free/BFR Free and is RoHS
Compliant
Typical Applications
LCD Display Backlight
Cellular Phones
Digital Still Cameras
Handheld Devices
http://onsemi.com
TQFN−16
HV3 SUFFIX
CASE 510AD
PIN CONNECTIONS
MARKING DIAGRAM
VIN
VOUT
CPWM
PWM
ADIM
LED6
LED5
LED4
C1+
C1−
C2+
C2−
GND
LED1
LED2
LED3
1
(Top View)
JABA
AXXX
YWW
JABA = CAT3649HV3−GT2
A = Assembly Location
XXX = Last Three Digits of Assembly Lot Number
Y = Production Year (Last Digit)
WW = Production Week (Two Digits)
Device
Package
Shipping
ORDERING INFORMATION
CAT3649HV3−GT2
TQFN−16
(Pb−Free)
2,000 /
Tape & Reel
†For information on tape and reel specifications,
including part orientation and tape sizes, please
refer to our Tape and Reel Packaging Specification
Brochure, BRD8011/D.