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LTC3210EUD

Description
LED Lighting Drivers LTC3210 - MAIN/CAM LED Controller in 3mm + 3mm QFN
CategoryAnalog mixed-signal IC    Drivers and interfaces   
File Size247KB,16 Pages
ManufacturerADI
Websitehttps://www.analog.com
Download Datasheet Download user manual Parametric View All

LTC3210EUD Overview

LED Lighting Drivers LTC3210 - MAIN/CAM LED Controller in 3mm + 3mm QFN

LTC3210EUD Parametric

Parameter NameAttribute value
Is it Rohs certified?incompatible
MakerADI
package instructionHVQCCN,
Reach Compliance Codenot_compliant
ECCN codeEAR99
Interface integrated circuit typeLED DISPLAY DRIVER
JESD-30 codeS-PQCC-N16
JESD-609 codee0
length3 mm
Humidity sensitivity level1
Multiplex display functionNO
Number of functions1
Number of segments1
Number of terminals16
Maximum operating temperature85 °C
Minimum operating temperature-40 °C
Package body materialPLASTIC/EPOXY
encapsulated codeHVQCCN
Package shapeSQUARE
Package formCHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE
Peak Reflow Temperature (Celsius)235
Certification statusNot Qualified
Maximum seat height0.8 mm
Maximum supply voltage4.5 V
Minimum supply voltage2.9 V
Nominal supply voltage3.6 V
surface mountYES
Temperature levelINDUSTRIAL
Terminal surfaceTin/Lead (Sn/Pb)
Terminal formNO LEAD
Terminal pitch0.5 mm
Terminal locationQUAD
Maximum time at peak reflow temperature20
width3 mm
LTC3210
MAIN/CAM LED Controller
in 3mm
×
3mm QFN
Description
The LTC
®
3210 is a low noise charge pump DC/DC converter
designed to drive four MAIN LEDs and one high current
CAM LED for camera lighting. The LTC3210 requires only
four small ceramic capacitors and two current set resis-
tors to form a complete LED power supply and current
controller.
Built-in soft-start circuitry prevents excessive inrush cur-
rent during start-up and mode changes. High switching
frequency enables the use of small external capacitors.
Independent MAIN and CAM full-scale current settings
are programmed by two external resistors. Shutdown
mode and current output levels are selected via two logic
inputs.
The full-scale current through the LEDs is programmed
via external resistors. ENM and ENC are toggled to adjust
the LED currents via internal counters and DACs. The
part is shut down when both ENM and ENC are low for
150µs (typ).
The charge pump optimizes efficiency based on the volt-
age across the LED current sources. The part powers up
in 1x mode and will automatically switch to boost mode
whenever any enabled LED current source begins to en-
ter dropout. The LTC3210 is available in a 3mm
×
3mm
16-lead QFN package.
Features
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n
n
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Low Noise Charge Pump Provides High Efficiency
with Automatic Mode Switching
Multimode Operation: 1x, 1.5x, 2x
Individual Full-Scale Current Set Resistors
Up to 500mA Total Output Current
Single Wire EN/Brightness Control for MAIN and
CAM LEDs (8 Brightness Steps)
64:1 Brightness Control Range for MAIN Display
Four 25mA Low Dropout MAIN LED Outputs
One 400mA Low Dropout CAM LED Output
Low Noise Constant Frequency Operation*
Low Shutdown Current: 3µA
Internal Soft-Start Limits Inrush Current During
Startup and Mode Switching
Open/Short LED Protection
No Inductors
3mm
×
3mm 16-Lead Plastic QFN Package
applications
n
Multi-LED Light Supply for Cellphones/DSCs/PDAs
L,
LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
*Protected by U.S. Patents including 6411531.
typical application
C2
2.2µF
C3
2.2µF
4-LED MAIN Display
Efficiency vs V
BAT
Voltage
100
90
EFFICIENCY (P
LED
/P
IN
) (%)
C1P
V
BAT
C1
2.2µF
V
BAT
C1M
C2P
C2M
CPO
C4
2.2µF
MLED1
MLED2
MLED3
MAIN
CAM
80
70
60
50
40
30
20 4 LEDs AT 9mA/LED
10 (TYP V
F
AT 9mA = 3V, NICHIA NSCW100)
T
A
= 25°C
0
3.0 3.2 3.4 3.6 3.8 4.0 4.2
V
BAT
(V)
LTC3210
ENM
ENC
ENM
ENC
RM
30.1k
1%
RC
24.3k
1%
MLED4
CLED
GND
3210 TA01
4.4
3210 TA01b
3210fb

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