EUP2990 Datasheet, PDF (1/1 Pages) Eutech Microelectronics Inc – 6 String White LED Driver

Preliminary
EUP2990
6 String White LED Driver
with Boost Converter
DESCRIPTION
The EUP2990 is a high efficiency boost regulator with
6 channel current sinker which is ideal for media size
LCD backlighting applications.
The device with integrated 2.5A/43V power MOSFET
uses current mode architecture and drives six strings in
parallel and supports up to 10 pieces of LEDs per
string. The switching frequency is programmable by an
external frequency setting resistor. The EUP2990
regulates the current in each LED string to the
programmed value set by an external current setting
resistor. The EUP2990 current matching can achieve
±2%. To provide enough headroom for the operating of
current sink, boost converter monitors the minimum
voltage of feedback pins and regulates an optimized
output voltage for power efficiency.
The EUP2990 has wide input voltage range from 2.5V
to 24V and provides adjustable 5mA to 50mA LED
current. It provides cycle-by-cycle over current
protection. The device supports PWM and analog
brightness dimming functions for accurate LED current
control.
The EUP2990 integrated multiple protect functions,
such as LED open, LED short, output over voltage,
over thermal and under voltage lockout, these
protections will prevent the LCD backlight from
damage.
The EUP2990 is available in a 3×3mm TQFN-20L
package.
Typical Application Circuit
FEATURES
2.5V to 24 V Input Voltage
6 Strings in Parallel and Up to 10 WLEDs Per
String
Integrated 2.5A 43V MOSFET
Output Voltage Up to 43V
Programmable Full Channel Current from 5mA
to 50mA
Direct PWM Dimming up to 20kHz
PWM to Analog Dimming up to 20kHz with 8
bit resolution
Better Than 2% Current Regulation Accuracy
Between Strings
Multiple Fault Protections
-Current Limit Protection
-Over Voltage Protection
-Over Temperature Protection
-WLED Open/Short Protection
Available in 3mm×3mm TQFN-20 Package
RoHS Compliant and 100% Lead (Pb)-Free
Halogen-Free
APPLICATIONS
Notebook LCD Display Backlight
UMPC LCD Display Backlight
DS2990 Ver0.1 Aug. 2013
Figure 1.
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