SP6683 Datasheet, PDF (3/14 Pages) Sipex Corporation – High Power LED Driver for Parallel Configuration

PIN NUMBER
1
2
3
4
PIN NAME
V_OUT
C1P
V_IN
V_MODE
5
FB
6
EN/PWM
7
C2N
8
GND
9
C1N
10
C2P
PIN DESCRIPTION
DESCRIPTION
Regulated charge pump output.
Positive terminal to the charge pump flying capacitor C2.
Input supply voltage.
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.
This is the feedback pin for output current or voltage regulation. The
voltage of this pin is compared with an internal 315mV reference.
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.
Negative terminal to the charge pump flying capacitor, C4.
Ground reference.
Negative terminal to the charge pump flying capacitor, C2.
Positive terminal to the charge pump flying capacitor C4.
FUNCTIONAL DIAGRAM
V_IN
EN/PWM
V_MODE
FB
Voltage
Reference
1.25V
MODE
COMP
1.2 MHz
Clock
Manager
Mode Control
315mV
V_OUT
COMP
GND
C1P
Start-up
and
C1N
Charge
Pump
C2P
Switches
C2N
V_OUT
Date: 3/31/06 RevG
SP6683 1X/1.5X Charge Pump LED Driver for Flash or Backlight
3
© Copyright 2006 Sipex Corporation