White LED Boost Regulator With Integrated Schottky Diode
Topologies
Inductor Boost
# of LEDs (max)
7
# of Channels
1
Digital Interface
N
Backlight For LCD Size
1.8 to 3.5
IOUT (max/Channel) (mA)
30
Peak Efficiency (%)
85
VIN (V)
2.7 to 5.5
VOUT (max) (V)
27
Frequency (MHz)
1.35
IS (max) (mA)
1
Iq (max) (μA)
1
Isw (typ) (mA)
350
Integrated Diode
Y
OVP
N
Fault Switch
N
Brightness Control
PWM
Product Information
Key Features
Up to 6 LEDs in series
27V maximum output
2.7V to 5.5V input
Up to 85% efficient
1.35MHz constant frequency
Enable/PWM dimming control
Pb-free plus anneal available (RoHS compliant)
Description
The ISL97631 represents a high efficiency, constant frequency PWM regulator with integrated boost diode and FET. Designed for use in white LED driving applications, the ISL97631 features efficiencies up to 85%. It operates at 1.35MHz switching frequency and operates from an input voltage of between 2.7V and 5.5V. The maximum output voltage of 27V enables the ISL97631 to drive up to 6 LEDs in series. It is also possible to use the ISL97631 to drive LEDs in series/parallel combination for applications requiring up to 15 LEDs.
Available in the 6 Ld TSOT package, the ISL97631 offers high efficiency, constant frequency operation. It is specified for operation over the -40°C to +85°C ambient temperature range.
The price listed is the manufacturer's suggested retail price for quantities of 1K units. However, prices in today's market are fluid and may change without notice.
MSL = Moisture Sensitivity Level - per IPC/JEDEC J-STD-020
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