SP6687 Datasheet, PDF (3/12 Pages) Sipex Corporation – 4 Channel Charge Pump White LED Driver

ELECTRICAL CHARACTERISTICS
Unless otherwise specified: V_IN = 2.85V to 5.5V, C1 = C2 =1.0µF (ESR = 0.03Ω, T_A = 25°C)
PARAMETER
MIN TYP MAX UNITS
CONDITIONS
Input High Threshold
Input Low Threshold
Input High Current
Input Low Current
Thermal Shutdown Threshold
Thermal Shutdown Hysteresis
1.5
0.4
1
1
140 150
180
10
V
Input High Logic threshold
(EN, CTRL0, CTRL1, CTRL2)
V
Input Low Logic threshold
(EN, CTRL0, CTRL1, CTRL2)
µA
V_IH = V_IN
µA
V_IL= GND
ºC
ºC
Note 1: ILED(ERR) =
I_{LED(MEA) -} I_LED(SET)
I_LED(SET)
X 100%
Note 2: Current Matching refers to the difference in current from one LED to the next.
(I_LED Current Matching
I_{LED(MAX) -} I_LED(MIN)
I_{LED(MAX) +} I_LED(MIN)
X 100%)
C1P C1N C2P C2N
FUNCTIONAL DIAGRAM
V_IN
1x/1.5x/2x
1MHz
GND
Charge Pump
1MHz
Oscillator
VOUT
Mode
Decision
I-Setting
ISET
ISET
LED1
ISET
EN
Bandgap
VREF
LED2
LED3
LED4
CTRL0
CTRL1
CTRL2
Decoder
306mV
Date: 11/15/05
SP6687 4Channel Charge Pump White LED Driver
3
© Copyright 2005 Sipex Corporation