Datasheet > CAT3637

CAT3637

更新时间： 2022-03-04 04:13:31

品牌	Logo	应用领域
安森美 - ONSEMI		驱动器
页数	文件大小	规格书
14页	215K
描述
6-Channel Programmable High Efficiency Quad-Mode LED Driver

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CAT3637 数据手册

CAT3637

6-Channel Programmable

High Efficiency

Quad-Mode⁾LED Driver

Description

http://onsemi.com

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.

TQFN−16

HV3 SUFFIX

CASE 510AD

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.

The device is available in a tiny 16−pad TQFN 3 x 3 mm package

with a maximum height of 0.8 mm.

PIN CONNECTIONS

C2−

C2+

C1−

C1+

LED6

LED5

LED4

LED3

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 6 LEDs Between 30 mA and 0 mA Each

• 1−wire EZDimt Interface with 2 mA Step

• Power Efficiency up to 92%

(Top View)

MARKING DIAGRAM

• Low Noise Input Ripple in All Modes

• “Zero” Current Shutdown Mode

JAAM

AXXX

YWW

• Soft Start and Current Limiting

• Short Circuit Protection

• Thermal Shutdown Protection

JAAM = CAT3637HV3−GT2

A = Assembly Location

XXX = Last Three Digits of Assembly Lot Number

Y = Production Year (Last Digit)

WW = Production Week (Two Digits)

• Tiny 3 mm x 3 mm, 16−pad TQFN Package

• These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS

Compliant

Applications

• LCD Display Backlight

• Cellular Phones

• Digital Still Cameras

• Handheld Devices

ORDERING INFORMATION

Device

Package

Shipping

TQFN−16

(Pb−Free)

2,000/

Tape & Reel

CAT3637HV3−GT2

(Note 1)

1. NiPdAu Plated Finish (RoHS−compliant).

Publication Order Number:

CAT3637/D

April, 2010 − Rev. 3

12 3 4 5 6 7...14

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