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SP6683ER-L/TR

P1-P3P4-P6P7-P9P10-P12P13-P14
1
Date: 3/31/06 RevG SP6683 1X/1.5X Charge Pump LED Driver for Flash or Backlight © Copyright 2006 Sipex Corporation
SP6683
The SP6683 is a high power current regulated charge pump ideal for converting a Li-Ion
battery input for driving up to 8 white LED’s used in backlighting color displays. The SP6683
operates with an internal 1.2MHz clock, enabling the use of small external components.
Output current can be accurately regulated by modulating the switcher between the charge
pump and output capacitor. In shutdown mode, the SP6683 discharges the output to ground
and draws less than 500nA current. Offered in 10-pin DFN package, the SP6683 family
includes three options that allow the user to optimize LED driving circuit; SP6683-LV with low
voltage reference, SP6683-03 with high impedance output in shutdown, and SP6683 with
pulled down output in shutdown.
TYPICAL APPLICATION SCHEMATIC
FEATURES
■ Output Current up to 200mA
■ Ideal for White LED driver in CellPhone Flash
■ 0.5µA Shutdown Current
■ 1x/1.5x Mode Charge Pump
■ +2.7V to +5.5V Input Voltage Range
■ Built-in 1.2MHz Oscillator
■ 0.5mA Quiescent Current
■ Over Temperature Protection
■ Shorted LED Protection
■ Programmable Output Current or Voltage
■ PWM Dimming Control via Enable Pin
■ Soft Start to limit In-Rush Current
■ Space Saving 10-pin 3 x 3mm DFN Package
■ Three Options for Optimizing Efficiency:
■ SP6683 - MOSFET discharge in shutdown
■ SP6683-03 - High Impedance in shutdown
■ SP6683-LV - Low Voltage (150mV)V
FB
Reference
APPLICATIONS
■ Mobile Phone
■ Camera Flash Driver
■ PDA
■ Digital Still Camera
■ Digital Camcorder
■ Color LCD Module
1X/1.5X High Efficiency Charge Pump
LED Driver for Flash or Backlight
Now Available in Lead Free Packaging
DESCRIPTION
SP6683
10 Pin DFN
10
9
8
7
6
C2P
C1N
GND
C2N
EN/PWM
1
2
3
4
5
V
OUT
C1P
V
IN
V
MODE
FB
SP6683
1 Vout
C1P
2
Vin3
Vmode
4
FB
5
10
C2P
C1N
9
GND
8
C2N
7
EN/PWM
6
EN/PWM
C1
2.2uF
6.3V/0603
C2
1uF
6.3V/0603
C4
6.3V/0603
C3
1uF
6.3V/0603
LED1
Rb
1.5 ohm
1% / 0603
Vin
2.7V~4.2V
Io=Vfb/Rb
2.2uF
2
Date: 3/31/06 RevG SP6683 1X/1.5X Charge Pump LED Driver for Flash or Backlight © Copyright 2006 Sipex Corporation
ELECTRICAL CHARACTERISTICS
Unless otherwise specified: V
IN
= 3.6V, C1 = C4 = 2.2µF & C2 = C3 = 1µF (Ceramic, ESR=0.03Ω) and T
AMB
=25°.
The ♦ denotes specifications which apply over full operating temperature range -40ºC to +85ºC.
V
IN
, V
MODE
, V
OUT
and EN/PWM ................. -0.3V to 6V
Output Current (I
OUT
) ...................................... 300mA
Power Dissipation per Package - 10-pin DFN
(derate 8.84mW/°C above +70°C) ..................... 1.2W
Junction Temperature .................................... +125°C
Storage Temperature ...................... -65°C to +150°C
ESD Rating. ................................................ 2kV HBM
These are stress ratings only and functional operation of
the device at these ratings or any other above those
indicated in the operation sections of the specifications
below is not implied. Exposure to absolute maximum
rating conditions for extended periods of time may affect
reliability.
ABSOLUTE MAXIMUM RATINGS
Parameter Min. Typ. Max. Units Conditions
Input Voltage 2.7 5.5 V ♦
Quiescent Current 0.5 3 mA
♦
V
IN
= 3.0 - 5.5V, V
OUT
= 3.6V,
Iout = 100µA
Shutdown Current 0.5 1.5 µA
♦
V
EN
/PWM = 0.0V, V
IN
= 5.5V
Maximum Load Current 200
mA
V
IN
= 4.2V, Vout = 3.6V
Oscillator Frequency 0.7 1.2 1.5 MHz ♦ V
IN
= 2.7 - 5.5V
V
FB
Reference Voltage 0.283 0.315 0.347 V ♦
I
OUT
= 20mA, V
OUT
= 3.6V,
1.5X Mode
Output Resistance
813
Ω
♦
1.5X Mode, 100mA Load
36
♦
1.0X Mode, 100mA Load
V
MODE
Threshold Voltage 1.00 1.25 1.50 V V
IN
Falling
V
MODE
Hysteresis 60 150 mV V
IN
= 3.6V
V
MODE
Pin Current 0.01 0.5 µA ♦ V
MODE
= 1.25 V
EN/PWM Logic Low 0.4 V
♦
EN/PWM Logic High 1.6 V
♦
EN/PWM Pin Current 0.01 0.5 µA
♦
V
EN
/PWM = 4.2V
FB Pin Current 0.01 0.5 µA
♦
V
FB
= 1V
V
OUT
Ripple 80 mV
V
OUT
= 4V, I
OUT
= 100mA ,1.5x
Mode
V
OUT
Turn-On Time 250 500 µs
♦
FB within 90% regulation
1.5X Mode, V
OUT
= 3.6, I
OUT
=
100µA
3
Date: 3/31/06 RevG SP6683 1X/1.5X Charge Pump LED Driver for Flash or Backlight © Copyright 2006 Sipex Corporation
FUNCTIONAL DIAGRAM
PIN DESCRIPTION
PIN NUMBER PIN NAME DESCRIPTION
1V
OUT
Regulated charge pump output.
2 C1P Positive terminal to the charge pump flying capacitor C2.
3V
IN
Input supply voltage.
4V
MODE
Charge pump mode program pin. When V
MODE
is greater than 1.25V,
a X1 charge pump is used. Otherwise, charge pump switches to X1.5
mode. A voltage divider shown in the typical application circuit
programs the V
IN
threshold for charge pump mode switching.
5FBThis is the feedback pin for output current or voltage regulation. The
voltage of this pin is compared with an internal 315mV reference.
6 EN/PWM Enable and PWM dimming control input. Pull this pin low to discon-
nect V
OUT
from V
IN
and shutdown the SP6683.V
OUT
is pulled to
ground in shutdown.
7C2N Negative terminal to the charge pump flying capacitor, C4.
8 GND Ground reference.
9C1N Negative terminal to the charge pump flying capacitor, C2.
10 C2P Positive terminal to the charge pump flying capacitor C4.
V
OUT
315mV
EN/PWM
1.25V
C2N
Start-up
and
Charge
Pump
Switches
V
MODE
C2P
C1P
FB
Mode Control
GND
V
IN
C1N
1.2 MHz
Clock
Manager
Voltage
Reference
MODE
COMP
V
OUT
COMP
P1-P3P4-P6P7-P9P10-P12P13-P14

SP6683ER-L/TR

Mfr. #:
Buy SP6683ER-L/TR
Manufacturer:
MaxLinear
Description:
LED Lighting Drivers High Power Parallel Configuration
Lifecycle:
New from this manufacturer.
Delivery:
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