High Efficiency Charge Pump White LED Driver
A8435
Startup Response
VEN
C1
Symbol
Parameter Units/Division
C1
C2
C3
t
VEN
IBATT
VOUT
time
5 V
50 mA
2 V
IBATT
C2
C3
500 μs
VOUT
t
2-Bit (EN1-EN2) Dimming Response
VEN
Symbol
Parameter Units/Division
C1
C1
C2
t
VEN1
IOUT
time
2 V
50 mA
5 μs
Conditions
EN2 = VIN
IOUT
C2
t
11-Level Single-Wire Serial Dimming
Response
VEN1
Symbol
C1
C2
C3
Parameter Units/Division
C1
C2
VEN1
IOUT
VOUT
time
2 V
50 mA
2 V
t
10 ms
Conditions
EN2 = CTRL = GND, apply control
signal to EN1
IOUT
VOUT
C3
t
Allegro MicroSystems, Inc.
6
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
ALLEGRO [ ALLEGRO MICROSYSTEMS ]
