MAX1707 Maxim Integrated Products, MAX1707 Datasheet

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MAX1707

Manufacturer Part Number
MAX1707
Description
Light-Management IC
Manufacturer
Maxim Integrated Products
Datasheet

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The MAX1707 provides complete light management for
main display backlight, subdisplay backlight (or RGB
indicator), and white LED camera flash with regulated
constant current up to 610mA total. By utilizing adap-
tive 1x/1.5x/2x charge-pump modes and very-low-
dropout current regulators, it achieves high efficiency
over the full 1-cell Li+ battery input voltage range. The
1MHz fixed-frequency switching allows for tiny external
components while the regulation scheme is optimized
to ensure low EMI and low input ripple. An integrated
derating function protects the LEDs from overheating
during high ambient temperatures.
The MAX1707 features an internally trimmed reference
to set the maximum LED current. An I
used for on/off control and setting the LED currents in
32 linear steps. When using the RGB indicator, the I
port provides 32k colors and programmable ramp-
up/down rates. The camera flash may be turned on/off
by the I
19-3744; Rev 0; 7/05
Inc., or one of its sublicensed Associated Companies, conveys
a license under the Philips I
ponents in an I
the I
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
Purchase of I
Light-Management IC with Efficient 1x/1.5x/2x
2
C Standard Specification as defined by Philips.
Cell Phones and Smartphones
PDAs, Digital Cameras, Camcorders
Displays with Up to 11 LEDs
2
C port or a separate digital logic input.
Charge Pump for Backlight/Flash/RGB LEDs
2
2
C components from Maxim Integrated Products,
C system, provided that the system conforms to
________________________________________________________________ Maxim Integrated Products
BRIGHTNESS
ON/OFF AND
V
INPUT
2.7V TO 5.5V
4.7µF
LOGIC
I
General Description
2
2
C PORT
C Patent Rights to use these com-
STROBE
ON/OFF
0.1µF
V
IN
PIN
GND
SCK
SDA
STB
Applications
DD
C1P
2
1µF
C
C1N
serial port is
MAX1707
PGND
C2P
1µF
C2N
2
C
OUT
M1
M2
M3
M4
S1
S2
S3
F1
F2
F3
F4
OUTPUT
UP TO 610mA
♦ Guaranteed 610mA Continuous Drive Capability
♦ 2-Wire I
♦ 92% Peak/83% Avg Efficiency (P
♦ Adaptive 1x/1.5x/2x Mode Switchover
♦ 0.3% (typ) LED Current Accuracy and Matching
♦ Low Input Ripple and EMI
♦ Low 0.1µA Shutdown Current
♦ Output Overvoltage Protection
♦ Thermal Derating Function Protects LEDs
♦ 24-Pin 4mm x 4mm Thin QFN Package
Pin Configuration appears at end of data sheet.
10µF
MAX1707ETG
PART
4 LEDs at 30mA Each for Main Display
3 LEDs at 30mA Each for Sub or RGB
400mA Total for Flash
5-Bit (32-Step) Linear Dimming
32k Colors
Ramp-Up/Down Rates
MAIN
2
C Serial Port
Typical Operating Circuit
-40°C to +85°C
TEMP RANGE
SUB OR RGB
Ordering Information
FLASH
PIN-
PACKAGE
24 Thin QFN
4mm x 4mm
LED
/P
Features
BATT
T2444-4
)
CODE
PKG
1

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