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CAT3637
6-Channel Programmable
High Efficiency
Quad-Mode ) LED Driver
Description
The CAT3637 is a high efficiency Quad ? Mode fractional charge
pump that can drive up to six LEDs programmable by a 1 ? wire digital
interface. The inclusion of a 1.33x fractional charge pump mode
increases 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 2.5 V to 5.5 V.
The EN/SET logic input functions as a chip enable and a digital
programming interface for setting the current in the LED channels.
The 1 ? wire pulse ? programming interface supports 15 linear steps
from zero current to 30 mA full ? brightness in 2 mA steps.
http://onsemi.com
TQFN ? 16
HV3 SUFFIX
CASE 510AD
PIN CONNECTIONS
The device is available in a tiny 16 ? pad TQFN 3 x 3 mm package
with a maximum height of 0.8 mm.
ON Semiconductor ’s Quad ? Mode 1.33x, charge pump switching
architecture is patented.
Features
LED6
LED5
LED4
LED3
1
C2 ?
C2+
C1 ?
C1+
?
?
?
?
?
?
?
?
?
?
?
?
High Efficiency 1.33x Charge Pump
Quad ? Mode Charge Pump: 1x, 1.33x, 1.5x, 2x
Drives 6 LEDs Between 30 mA and 0 mA Each
1 ? wire EZDim t Interface with 2 mA Step
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
Tiny 3 mm x 3 mm, 16 ? pad TQFN Package
These Devices are Pb ? Free, Halogen Free/BFR Free and are RoHS
Compliant
(Top View)
MARKING DIAGRAM
JAAM
AXXX
YWW
JAAM = CAT3637HV3 ? GT2
A = Assembly Location
XXX = Last Three Digits of Assembly Lot Number
Y = Production Year (Last Digit)
WW = Production Week (Two Digits)
Applications
?
?
?
?
LCD Display Backlight
Cellular Phones
Digital Still Cameras
Handheld Devices
ORDERING INFORMATION
Device Package Shipping
CAT3637HV3 ? GT2 TQFN ? 16 2,000/
(Note 1) (Pb ? Free) Tape & Reel
1. NiPdAu Plated Finish (RoHS ? compliant).
? Semiconductor Components Industries, LLC, 2010
April, 2010 ? Rev. 3
1
Publication Order Number:
CAT3637/D
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相关代理商/技术参数
CAT3637HV3-GT2 功能描述:LED照明驱动器 Hi Eff Quad Mode LED Driver RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N
CAT3643 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:3-Channel Ultra High Efficiency Quad-Mode LED Driver
CAT3643_0710 制造商:CATALYST 制造商全称:Catalyst Semiconductor 功能描述:3-Channel Ultra High Efficiency Quad-Mode⑩ LED Driver
CAT3643HL1-T2 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:3-Channel Ultra High Efficiency Quad-Mode LED Driver
CAT3643HV2-GT2 功能描述:LED照明驱动器 LED Driver,Quad mode,3 ch RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N
CAT3643HV2-T2 功能描述:LED照明驱动器 LED Driver,Quad mode,3 ch RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N
CAT3643HV3 制造商:ON Semiconductor 功能描述:IC 3-LED DRIVER QUAD HI EFFICIENCY
CAT3643HV3-GT2 功能描述:LED照明驱动器 LED Driver,Quad mode,3 ch RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N