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MIC2846A-MFYMT

Description
High Efficiency 6 Channel Linear WLED Driver with DAM鈩? Digital Control and Dual Low IQ LDOs
CategoryAnalog mixed-signal IC    Drivers and interfaces   
File Size1MB,20 Pages
ManufacturerMicrochip
Websitehttps://www.microchip.com
Environmental Compliance
Download Datasheet Parametric Compare View All

MIC2846A-MFYMT Overview

High Efficiency 6 Channel Linear WLED Driver with DAM鈩? Digital Control and Dual Low IQ LDOs

MIC2846A-MFYMT Parametric

Parameter NameAttribute value
Is it Rohs certified?conform to
package instruction2.50 X 2.50 MM, GREEN, MLF-14
Reach Compliance Codecompli
ECCN codeEAR99
data entry modeSERIAL
Interface integrated circuit typeLED DISPLAY DRIVER
JESD-30 codeS-XQCC-N14
JESD-609 codee4
length2.5 mm
Humidity sensitivity level1
Multiplex display functionNO
Number of functions1
Number of segments6
Number of terminals14
Maximum operating temperature125 °C
Minimum operating temperature-40 °C
Package body materialUNSPECIFIED
encapsulated codeHVQCCN
Package shapeSQUARE
Package formCHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE
Peak Reflow Temperature (Celsius)260
Certification statusNot Qualified
Maximum seat height0.6 mm
Maximum supply voltage5.5 V
Minimum supply voltage3 V
Nominal supply voltage3.8 V
surface mountYES
technologyCMOS
Temperature levelAUTOMOTIVE
Terminal surfaceNICKEL PALLADIUM GOLD
Terminal formNO LEAD
Terminal pitch0.5 mm
Terminal locationQUAD
Maximum time at peak reflow temperature40
width2.5 mm
Base Number Matches1
MIC2846A
High Efficiency 6 Channel Linear WLED
Driver with DAM™, Digital Control and Dual
Low I
Q
LDOs
General Description
The MIC2846A is a high efficiency White LED (WLED)
driver featuring two low quiescent current LDOs. It is
designed to drive up to six LEDs and greatly extend
battery life for portable display backlighting and keypad
backlighting in mobile devices. The MIC2846A architecture
provides the highest possible efficiency by eliminating
switching losses present in traditional charge pumps or
inductive boost circuits. With a typical dropout of 40mV at
20mA, the MIC2846A allows the LEDs to be driven directly
from the battery eliminating switching noise and losses
present with the use of boost circuitry.
The MIC2846A features Dynamic Averaged Matching™
(DAM™) which is specifically designed to get the optimum
matching despite process variations. This ensures a
typical matching of ±1.5% between all six LED channels.
The LED brightness is preset by an external resistor and
can be dimmed using a single-wire digital control. The
digital interface takes commands from digital programming
pulses to change the brightness in a logarithmic scale
similar to the eye’s perception of brightness. The single-
wire digital brightness control is divided into two modes of
operation; full brightness mode or battery saving mode for
a total of 49 brightness steps.
The MIC2846A also features two independently enabled
low quiescent current LDOs. Each LDO offers ±3%
accuracy over temperature, low dropout voltage (150mV
@ 150mA), and low ground current under all load
conditions (typically 35µA). Both LDOs can be turned off to
draw virtually no current.
The MIC2846A is available in the 2.5mm x 2.5mm 14-pin
Thin MLF
®
leadless package with a junction temperature
range of -40°C to +125°C
Datasheet and support documentation can be found on
Micrel’s web site at: www.micrel.com.
Features
WLED Driver
High Efficiency (no Voltage Boost losses)
Dynamic Average Matching™ (DAM™)
Single wire digital control
Input voltage range: 3.0V to 5.5V
Dropout of 40mV at 20mA
Matching better than ±1.5% (typical)
Current accuracy better than ±1.5% (typical)
Maintains proper regulation regardless of how many
channels are utilized
LDOs
Very low ground current – Typical 35µA
Stable with 1µF ceramic output capacitor
Dropout at 150mV at 150mA
Thermal shutdown and current limit protection
Available in a 2.5mm x 2.5mm 14-pin Thin MLF
®
package
Applications
Mobile handsets
LCD Handset backlighting
Handset keypad backlighting
Digital cameras
Portable media/MP3 players
Portable navigation devices (GPS)
Portable applications
DAM, Dynamic Average Matching is a trademark of Micrel, Inc.
MLF and
MicroLeadFrame
are registered trademark Amkor Technology Inc.
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (
408
) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
April 2010
M9999-041210-D

MIC2846A-MFYMT Related Products

MIC2846A-MFYMT MIC2846A MIC2846A-MGYMT MIC2846A-PPYMT
Description High Efficiency 6 Channel Linear WLED Driver with DAM鈩? Digital Control and Dual Low IQ LDOs High Efficiency 6 Channel Linear WLED Driver with DAM鈩? Digital Control and Dual Low IQ LDOs High Efficiency 6 Channel Linear WLED Driver with DAM鈩? Digital Control and Dual Low IQ LDOs High Efficiency 6 Channel Linear WLED Driver with DAM鈩? Digital Control and Dual Low IQ LDOs
Is it Rohs certified? conform to - conform to conform to
package instruction 2.50 X 2.50 MM, GREEN, MLF-14 - 2.50 X 2.50 MM, GREEN, MLF-14 HVQCCN,
Reach Compliance Code compli - compli compli
ECCN code EAR99 - EAR99 EAR99
data entry mode SERIAL - SERIAL SERIAL
Interface integrated circuit type LED DISPLAY DRIVER - LED DISPLAY DRIVER LED DISPLAY DRIVER
JESD-30 code S-XQCC-N14 - S-XQCC-N14 S-XQCC-N14
JESD-609 code e4 - e4 e4
length 2.5 mm - 2.5 mm 2.5 mm
Humidity sensitivity level 1 - 1 1
Multiplex display function NO - NO NO
Number of functions 1 - 1 1
Number of segments 6 - 6 6
Number of terminals 14 - 14 14
Maximum operating temperature 125 °C - 125 °C 125 °C
Minimum operating temperature -40 °C - -40 °C -40 °C
Package body material UNSPECIFIED - UNSPECIFIED UNSPECIFIED
encapsulated code HVQCCN - HVQCCN HVQCCN
Package shape SQUARE - SQUARE SQUARE
Package form CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE - CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE
Peak Reflow Temperature (Celsius) 260 - 260 260
Certification status Not Qualified - Not Qualified Not Qualified
Maximum seat height 0.6 mm - 0.6 mm 0.6 mm
Maximum supply voltage 5.5 V - 5.5 V 5.5 V
Minimum supply voltage 3 V - 3 V 3 V
Nominal supply voltage 3.8 V - 3.8 V 3.8 V
surface mount YES - YES YES
technology CMOS - CMOS CMOS
Temperature level AUTOMOTIVE - AUTOMOTIVE AUTOMOTIVE
Terminal surface NICKEL PALLADIUM GOLD - NICKEL PALLADIUM GOLD NICKEL PALLADIUM GOLD
Terminal form NO LEAD - NO LEAD NO LEAD
Terminal pitch 0.5 mm - 0.5 mm 0.5 mm
Terminal location QUAD - QUAD QUAD
Maximum time at peak reflow temperature 40 - 40 40
width 2.5 mm - 2.5 mm 2.5 mm
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