SP6415 Datasheet, PDF (1/12 Pages) Sipex Corporation – Integrated White LED Driver With Organic LED Display Power Supply

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SP6415
TM
Integrated White LED Driver With
Organic LED Display Power Supply
• Integrated OLED and White-LED Driver
• Wide Input Voltage Range: 2.7V to 5.5V
• Adjustable output voltage up to 20V
DFN-10
(3mmx3mmx0.85mm)
Top View
0  8 7 6
• Complete Protection: OVP, OTP, UVP
• PWM Dimming Control
• Small External Components
• Cycle-By-Cycle Current Limit
• Lead Free, RoHS Compliant
Packaging: 10Pin DFN
SP6415
2345
Applications
 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
C_IN
4.7µF
L 0µH
D
SW
V_IN
OVP
Main Display
C_OUT
4.7µF
V_IN
2.7V~4.2V
C _IN
4.7µF
L 0µH
SW
V_IN
D
OVP
Main Display
C_OUT
4.7µF
CH
>.5V
0V
Main
FB
SP6415
EN
CH2
V_SUB
SEL
FB2
GND
ILED
VFB
ILED=
R_FB
0.2
R _FB
47pF
R_SUB
R_SUB2
OLED
SUB
Display


V_SUB
=

^{1 +}
R_SUB1
R_{SUB 2}

 ^×1.23
Figure . Main LEDs Display and OLED SUB Display
>.5V
0V
SP6415
CH
FB
EN
CH2
Main
V_SUB
SEL
FB2
GND
ILED
V_FB
ILED=
R _FB
0.2
R_FB
V_SUB
C _OUT2
4.7µF
ILED2
V_FB2
R_FB2
ILED2=
.23
R_FB2
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