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Maxim Integrated Semiconductor Electronic Components Datasheet

MAX8830 Datasheet

LED Light Management IC

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19-0782; Rev 1; 6/08
LED Light Management IC in
2.5mm x 2.5mm UCSP
General Description
The MAX8830 light management IC integrates a 400mA
(guaranteed) PWM DC-DC step-up converter, a 320mA
white LED camera flash current sink, and four program-
mable LED current sinks. The internal 1MHz step-up
converter features an internal switching MOSFET and
synchronous rectifier to improve efficiency and minimize
external component count. The camera flash output cur-
rent and maximum timer is programmable through I2C.
Each LED current is individually regulated to a program-
mable level (from off to 10mA in 32 steps) and is com-
pletely independent of each other.
An I2C interface controls individual on/off of all outputs,
step-up output voltage setting, movie/flash current,
flash timer duration settings, and individual LED current
sink settings.
The MAX8830 is available in a 16-bump UCSP™ pack-
age (2.5mm x 2.5mm).
Applications
Cell Phones and Smartphones
PDAs and MP3 Players
Typical Operating Circuit
INPUT
2.7V TO 5.5V
CIN
2.2μH TO
10μH
LX
IN
GND
PROGRAMMABLE
OUTPUT
3.8V TO 5.2V
UP TO 400mA*
OUT
COUT
PGND
MOVIE ON
FLASH ON
IC
VLOGIC
MAX8830
COMP
320mA FLASH
MVON
FLED
FLEN LED1
SCL LED2
SDA
LED3
VDD
LED4
*GUARANTEED OUTPUT CURRENT FOR EXTERNAL CIRCUITRY IS 400mA
MINUS THE SUM OF ALL LED CURRENTS.
Features
Step-Up DC-DC Converter
400mA Guaranteed Output Current
Over 90% Efficiency
On-Chip FET and Synchronous Rectifier
Fixed 1MHz PWM Switching
Small 2.2µH to 10µH Inductor
I2C-Programmable VOUT (3.8V to 5.2V and Off in
16 Steps)
Flash LED Current Sink
I2C-Programmable Flash Output Current (Off to
320mA in 32 Steps)
I2C-Programmable Flash Maximum Timer (0.5s,
1.0s, 1.5s, or 2.0s)
I2C-Programmable Movie Output Current (Off to
160mA in 16 Steps)
Movie Enabled by I2C or Logic Input
Flash Enabled by Logic Input
Low Dropout (75mV typ)
Four LED Current Sinks
Individually I2C-Programmable Output Current
Off to 10mA in 32 Steps
Low LED Sink Current Dropout Voltage (30mV typ)
I2C Interface
Write Address (0x94), Read Address (0x95)
Individual On/Off and LED Current Settings
Simple Register Mapping
< 1µA Shutdown Current
Open/Short LED Detection
Thermal-Shutdown Protection
16-Bump, 2.5mm x 2.5mm UCSP Package
Ordering Information
PART
TEMP
RANGE
MAX8830EWE+T
-40°C to
+85°C
+Denotes a lead-free package.
PIN-PACKAGE
16 UCSP (2.5mm x 2.5mm)
Pin Configuration appears at the end of data sheet.
UCSP is a trademark of Maxim Integrated Products, Inc.
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.


Maxim Integrated Semiconductor Electronic Components Datasheet

MAX8830 Datasheet

LED Light Management IC

No Preview Available !

LED Light Management IC in
2.5mm x 2.5mm UCSP
ABSOLUTE MAXIMUM RATINGS
IN, OUT to GND………………………....…………..-0.3V to +6.0V
IN, OUT to GND (maximum of 1µs) ....................................+7.0V
VDD to GND ...........................................................-0.3V to +4.0V
SCL, SDA, MVON, FLEN to GND..................-0.3V to VDD + 0.3V
COMP, FLED, LED_ to GND .......................-0.3V to VOUT + 0.3V
PGND to GND .......................................................-0.3V to +0.3V
Continuous ILX Current......................................................1ARMS
Continuous Power Dissipation (TA = +70°C)
16-Bump 2.5mm x 2.5mm UCSP
(derate 105.7mW/°C above +70°C) .............................750mW
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Bump Temperature* (soldering) ......................................+235°C
*This device is constructed using a unique set of packaging techniques that impose a limit on the thermal profile the device can be
exposed to during board level solder attach and rework. This limit permits only the use of the solder profiles recommended in the
industry-standard specification, JEDEC 020A, paragraph 7.6, Table 3 for IR/VPR and Convection reflow. Preheating is required.
Hand or wave soldering is not allowed.
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(VIN = 3.6V, VGND = VPGND = 0V, VDD = 3.0V, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)
PARAMETER
DESCRIPTION
MIN TYP MAX UNITS
IN Operating Voltage
2.7 5.5 V
VDD Operating Range
VDD Undervoltage Lockout (UVLO) Threshold
VDD UVLO Hysteresis
IN UVLO Threshold
IN UVLO Hysteresis
VDD falling
VIN rising
1.7 3.6
1.35 1.5 1.65
50
2.25 2.45 2.65
50
V
V
mV
V
mV
VDD Standby Supply Current
IN Standby Supply Current
IN Shutdown Supply Current
Thermal-Shutdown Hysteresis
SCL = SDA = VDD,
I2C ready
SCL = SDA = VDD,
I2C ready
All outputs off,
VDD = 0
TA = +25°C
TA = +85°C
TA = +25°C
TA = +85°C
TA = +25°C
TA = +85°C
3 10
4
5 15
5
0.1 5
1
20
µA
µA
µA
°C
Thermal-Shutdown
LOGIC AND I2C INTERFACE
+160
°C
Logic Input-High Voltage
Logic Input-Low Voltage
Logic Input Current
SDA Output Low Voltage
I2C Clock Frequency
VDD = 1.7V to 3.6V
MVON, FLEN
SCL, SDA
VDD = 1.7V to 3.6V
MVON, FLEN
SCL, SDA
VIL = 0V or VIH = 3.6V
ISDA = 3mA
TA = +25°C
TA = +85°C
1.6
0.7 x
VDD
-1
0.01
0.1
0.03
0.4
0.3 x
VDD
+1
0.4
400
V
V
µA
V
kHz
Bus-Free Time Between START and STOP
Hold Time Repeated START Condition
SCL Low Period
tBUF
tHD_STA
tLOW
1.3
0.6 0.1
1.3 0.2
µs
µs
µs
2 _______________________________________________________________________________________


Part Number MAX8830
Description LED Light Management IC
Maker Maxim Integrated Products
PDF Download

MAX8830 Datasheet PDF






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