EUP2796JIR1 EUTECH [Eutech Microelectronics Inc], EUP2796JIR1 Datasheet

no-image

EUP2796JIR1

Manufacturer Part Number
EUP2796JIR1
Description
Dual-Display White LED Driver with 3/2X Switched Capacitor Boost
Manufacturer
EUTECH [Eutech Microelectronics Inc]
Datasheet
DESCRIPTION
The EUP2796 is a charge-pump based white-LED
driver that is ideal for mobile phone display
backlighting. It can drive up to 6 LEDs in parallel
with up to 20mA through each LED. Regulated
internal current sources deliver excellent current and
brightness matching in all LEDs. The LED-driver
current sources are split into two independently
controlled groups.
The primary group (4 LEDs) can be used to backlight
the main phone display. The second group (2 LEDs)
can be used to backlight a secondary display or to
provide other lighting features (keypad LEDs, for
example). Brightness of the two groups can be adjusted
independently with pulse-width modulated (PWM )
digital signals.
The EUP2796 works off an extended Li-Ion input
voltage range (2.7V to 5.5V). Voltage boost is
achieved with a high-efficiency 3/2- gain charge pump.
The EUP2796 is available in a 16-pin TQFN package.
Typical Application Circuit
DS2796 Ver1.0 Feb. 2007
Dual-Display White LED Driver with 3/2X
Switched Capacitor Boost
Figure 1.
1
FEATURES
APPLICATIONS
Drives up to 6 LEDs with up to 20mA each
LEDs controlled in 2 Distinct Groups, for
Backlighting 2 Displays (main LCD and
sub-LCD)
Excellent Current and Brightness Matching
High Efficiency 3/2X Charge Pump
Extended Li-Ion Input: 2.7V to 5.5V
PWM Brightness Control: 100Hz - 1kHz
3mm × 3 mm TQFN-16 Package
RoHS Compliant and 100% Lead(Pb)-Free
Mobile Phone Display Lighting
Mobile Phone Keypad Lighting
PDAs
General LED Lighting
EUP2796

Related parts for EUP2796JIR1

EUP2796JIR1 Summary of contents

Page 1

Dual-Display White LED Driver with 3/2X DESCRIPTION The EUP2796 is a charge-pump based white-LED driver that is ideal for mobile phone display backlighting. It can drive LEDs in parallel with up to 20mA through each LED. Regulated ...

Page 2

Pin Configurations Package Type TQFN-16 Pin Description PIN Pin C2P 1 Positive terminal Charge pump output OUT Current sense input. Connect 1% resistor to ground to set constant current through I 3 SET LED Enable for ...

Page 3

... Ordering Information Order Number Package Type EUP2796JIR1 TQFN-16 EUP2796- □ □ □ □ Lead Free Code 1: Lead Free 0: Lead Packing R: Tape & Reel Operating temperature range I: Industry Standard Package Type J: TQFN-16 Block Diagram DS2796 Ver1.0 Feb. 2007 Marking Operating Temperature range ...

Page 4

Absolute Maximum Ratings V -------------------------------------------------------------------------------- -0. max IN ENM,ENS, ------------------------------------------------------- -0. Continuous Power Dissipation ------------------------------------------------- Internally Limited TQFN-16L 3 × 3, θ Junction-to-Ambient Thermal resistance (θ Junction Temperature (T Storage Temperature Range ----------------------------------------------------- -65°C to 150°C ...

Page 5

Typical Operating Characteristics LED Current vs VIN 16.25 16.00 15.75 15.50 15.25 15.00 14.75 14.50 2.7 3.2 3.7 4.2 Pow er Supply (V) LED Current vs RSET 30.00 25.00 20.00 15.00 10.00 5.00 0. RSET Resistance ...

Page 6

Input Current vs. Supply Voltage (Rset=7.5KΩ, VLED=3.6V ) 160 140 120 100 2.7 3.1 3.5 3.9 Supply Voltage(V) DS2796 Ver1.0 Feb. 2007 16.25 6 LEDs 16.00 4 LEDs 15.75 2 LEDs 15.50 15.25 15.00 14.75 14.50 ...

Page 7

Application Information Enable Pins: ENM, ENS The EUP2796 has 2 enable pins-ENM and ENS, which control the main and sub LEDs. All two are active-high logic (HIGH = ON). When both of ENM or ENS voltage is low (<0.5V), the ...

Page 8

Soft-Start The EUP2796 contains internal soft-start circuitry to limit input inrush currents when the part is enabled. Soft start is implemented internally controlled turn-on of the internal voltage reference. During soft start, the current through the LED outputs rise at ...

Page 9

Packaging Information SYMBOLS DS2796 Ver1.0 Feb. 2007 TQFN-16 MILLIMETERS MIN. MAX. MIN. 0.70 0.80 0.028 0.00 0.05 0.000 0.18 0.30 0.007 2.90 3.10 0.114 2.90 3.10 0.114 1.70 1.70 0.50 0.30 ...

Related keywords