SP6682 Datasheet, PDF (3/12 Pages) Sipex Corporation – High Efficiency Charge Pump Regulator for White LEDs

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 pin for the 2.7V to 5.5V supply voltage.
Charge pump mode program pin. When V_MODE is greater than 1.25V,
X1.5 charge pump is used. Otherwise, charge pump switches to X2
mode. A voltage divider shown in 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 306mV reference.
Enable and PWM dimming control input. Pull this pin low to discon-
nect V_OUT from V_IN and shutdown the SP6682.
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/PW
V_MODE
FB
Voltage
Referenc
1.25V
MODE
COMP
600 kHz
Clock
Manager
Mode Control
306m
V_OUT
COMP
GND
Start-up
and
Charge
Pump
Switches
C1P
C1N
C2P
C2N
V_OUT
Date: 5/5/04
SP6682 High Efficiency Charge Pump Regulator for White LEDs
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© Copyright 2004 Sipex Corporation