The MAX8647/MAX8648 drive up to six white LEDs or
two sets of RGB LEDs with regulated constant current
for display backlight and fun light applications. By utilizing
an inverting charge pump and extremely low-dropout
adaptive current regulators, these ICs achieve
very high efficiency over the full 1-cell Li+ battery voltage
range and even with large LED forward voltage
mismatch. The 1MHz fixed-frequency switching allows
for tiny external components. The regulation scheme is
optimized to ensure low EMI and low input ripple. The
MAX8647/MAX8648 include thermal shutdown, open- and
short-circuit protection.
The MAX8647 features an I²C serial port, while the
MAX8648 features a three-wire serial-pulse logic interface.
Both devices support independent on/off and
dimming for main and subbacklights. The dimming
ranges are pseudo-logarithmic from 24mA to 0.1mA
and off in 32 steps. Both devices include a temperature
derating function to safely allow bright 24mA full-scale
output current setting while automatically reducing current
to protect LEDs at high ambient temperatures
above +60°C.
The MAX8647/MAX8648 are available in a 16-pin, 3mm x 3mm thin QFN package (0.8mm max height).
* Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.
Devices:
1-4 of 4
MAX8647
Free Sample
Buy
Status
Package:
TYPE PINS FOOTPRINT
DRAWING CODE/VAR *
Temp
RoHS/Lead-Free? Materials Analysis
MAX8647ETE+
Active
TQFN;16 pin;10 mm²
Outline Drawing: 21-0136 (PDF)
Land Pattern: 90-0032 (PDF)
Use pkgcode/variation: T1633+5*
MAX1848 White LED Step-Up Converter in SOT23 MAX1582 High-Efficiency Step-Up Converters for White LED Main and Subdisplay Backlighting MAX1573 White LED 1x/1.5x Charge Pump in UCSP and Thin QFN MAX1575 White LED 1x/1.5x Charge Pump for Main and Sub-Displays MAX1574 180mA, 1x/2x, White LED Charge Pump in 3mm x 3mm TDFN MAX1576 480mA White LED 1x/1.5x/2x Charge Pump for Backlighting and Camera Flash MAX1561, MAX1599 High-Efficiency, 26V Step-Up Converters for Two to Six White LEDs MAX1578, MAX1579 Complete Bias and White LED Power Supplies for Small TFT Displays MAX8595X, MAX8596X High-Efficiency, 36V Step-Up Converters with TA Derating Option for 2 to 9 White LEDs
More Like This: View Product Families for Similar Products
Download
E-Mail