CAT3616 Datasheet, PDF (1/14 Pages) Catalyst Semiconductor – 6-Channel Charge Pump LED Driver with EZDimTM

CAT3616
6-Channel Charge Pump
LED Driver with EZDimt
Description
The CAT3616 is a high efficiency 1x/1.5x fractional charge pump
with programmable dimming current in six LED channels. To ensure
uniform brightness in LCD backlight applications, each LED channel
delivers an accurate regulated current.
Low noise and input ripple is achieved by operating at a constant
switching frequency of 1 MHz which allows the use of small external
ceramic capacitors. The 1x/1.5x fractional charge pump supports a
wide range of input voltages from 3 V to 5.5 V with efficiency up to
91%, and is ideal for Li−Ion battery powered devices.
Two groups of LEDs, main (MAIN1 to MAIN4) and sub (SUB1 and
SUB2) are programmable through the ENM (active low) and ENS
inputs. Independent current from 1 mA to 31 mA with a 1 mA step are
set by toggling the ENM and ENS inputs. The enable EN input pin
allows to shutdown the device with zero quiescent current.
The device is available in a 16−pad TQFN package with a max
height of 0.8 mm.
Features
• 6 LED Channels with Tight Matching
• Independent Main and Sub Channels
• 1−wire EZDimt Programmable LED Current
• Accurate 1 mA Dimming Level
• Power Efficiency up to 91%
• Fractional Pump 1x/1.5x
• Low Noise Input Ripple
• Fixed High Frequency Operation 1 MHz
• “Zero” Current Shutdown Mode
• Soft Start and Current Limiting
• Short Circuit Protection
• Thermal Shutdown Protection
• 16−pad TQFN 4 mm x 4 mm Package
• These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS
Compliant
Applications
• Main and Sub−display Backlight
• Color LCD and Keypad Backlighting
• Cellular Phones
• Handheld Devices
• Digital Cameras
© Semiconductor Components Industries, LLC, 2010
1
April, 2010 − Rev. 3
http://onsemi.com
1
TQFN−16
HV4 SUFFIX
CASE 510AE
PIN CONNECTIONS
1
MAIN1
ENM
ENS
EN
TAB
is
GND
SUB2
GND
C2+
C2−
(Top View)
MARKING DIAGRAMS
G616
AXXX
YMCC
CDAH
AXXX
YMCC
G616 = CAT3616HV4−T2
CDAH = CAT3616HV4−GT2
A = Assembly Location
XXX = Last Three Digits of Assembly Lot Number
Y = Production Year (Last Digit)
M = Production Month (1-9, A, B, C)
CC = Country of Origin (Two Digit)
Note: Two digit code for country of origin:
Thailand = TH
Malaysia = MY
ORDERING INFORMATION
Device
CAT3616HV4−T2
(Note 1)
Package
TQFN−16
(Pb−Free)
Shipping
2,000/
Tape & Reel
CAT3616HV4−GT2 TQFN−16
(Note 2)
(Pb−Free)
2,000/
Tape & Reel
1. Matte−Tin Plated Finish (RoHS−compliant).
2. NiPdAu Plated Finish (RoHS−compliant).
Publication Order Number:
CAT3616/D