AP1521
White LED Step-Up Converter
Block Diagram
1 SW
Driver
R
S
Q
Q1
Comparator
-
A2
+
-
FB 3
V
IN
5
V
REF
1.25V
A1
R
C
+
C
C
Σ
RAMP
Generator
-
SHDN 4
Shutdown
1MHz
Oscillator
2 GND
Absolute Maximum Ratings
Symbol
V
IN
V
SW
V
FB
V
SHDN
T
J
T
LEAD
T
OPR
VIN Pin Voltage
SW Voltage
Feedback Pin Voltage
SHDN Pin Voltage
Maximum Junction Temperature
Lead Temperature
Operating Temperature Range
Parameter
Rating
10
36
10
10
125
300
-40 to +85
Unit
V
V
V
V
o
o
o
o
+
310mV
C
C
C
T
STG
Storage Temperature Range
-40 to +125
C
Caution The absolute maximum ratings are rated values exceeding which the product could suffer physical
damage. These values must therefore not be exceeded under any condition.
Anachip Corp.
www.anachip.com.tw
2/8
Rev. 0.1
Apr. 27, 2004
ANACHIP [ ANACHIP CORP ]
