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SP6415
TM
Integrated White LED Driver With
Organic LED Display Power Supply
• Integrated OLED and White-LED Driver
DFN-10
(3mmx3mmx0.85mm)
Top View
• Wide Input Voltage Range: 2.7V to 5.5V
0 8 7 6
• Adjustable output voltage up to 20V
• Complete Protection: OVP, OTP, UVP
• PWM Dimming Control
SP6415
• Small External Components
• Cycle-By-Cycle Current Limit
2345
• Lead Free, RoHS Compliant
Packaging: 10Pin DFN
Appli cations
White LED Back-Lighting
Hand-held Devices
Digital Cameras
Flip-phones / Clam-shell Cellular Phones
High-fashion cellular phones
DESCRIPTION
The SP6415 is a dual Boost DC/DC converter, designed to drive up to 4 white LEDs with a constant cur-
rent and to power an organic LED display with a constant voltage. According to the SEL pin status, the
SP6415 either regulates output current flowing through series connected LEDs or regulates output volt-
age applying to the OLED. A single external resistor is used to set the maximum LED current. The LED
current can be adjusted by applying a PWM signal to the EN pin. Pulling the EN pin to GND disables the
chip and reduces the supply current to less than 1uA. Additional features include a low-side NFET switch
that can turn off the LED string with no DC current path to ground. Other features include OVP, OCP,
UVP and OTP. The SP6415 is available in a small (3mmx3mmx0.85mm) DFN-10 package.
TYPICAL APPLICATION CIRCUIT
V IN
2.7V~4.2V
CIN
4.7µF
L 0µH
D
SW
VIN
OVP
Main Display
COUT
4.7µF
VIN
2.7V~4.2V
C IN
4.7µF
L 0µH
SW
VIN
D
OVP
Main Display
COUT
4.7µF
CH
>.5V
0V
Main
FB
SP6415
EN CH2
VSUB
SEL
FB2
GND
ILED
VFB
ILED=
RFB
0.2
R FB
47pF
RSUB
RSUB2
OLED
SUB
Display
VSUB
=
1 +
RSUB1
RSUB 2
×1.23
Figure . Main LEDs Display and OLED SUB Display
>.5V
0V
SP6415
CH
FB
EN CH2
Main
VSUB
SEL
FB2
GND
ILED
VFB
ILED=
R FB
0.2
RFB
VSUB
C OUT2
4.7µF
ILED2
VFB2
RFB2
ILED2=
.23
RFB2
Figure 2. 4 LEDs for Main Panel and 3 LEDs for SUB Panel
Feb27-07 Rev K
Integrated White LED Driver With Organic LED Display Power Supply
© 2007 Sipex Corporation
