ZXSC400
ABSOLUTE MAXIMUM RATINGS
V
CC
DRIVE
EOR
STDN
SENSE
Operating Temp.
Storage Temp.
Power Dissipation
-0.3V to
-0.3V to
-0.3V to
-0.3V to
-0.3V to
-40°C to
-55°C to
450mW
+10V
V
CC
+ 0.3V
V
CC
+ 0.3V
The lower of (+5.0V) or (V
CC
+ 0.3V)
The lower of (+5.0V) or (V
CC
+ 0.3V)
+85°C
+125°C
ELECTRICAL CHARACTERISTICS
Test Conditions V
CC
= 3V, T= -40°C to 85°C unless otherwise stated.
Symbol
Parameter
Conditions
Min
Supply parameters
V
IN
Iq
1
I
STDN
Eff
1
Acc
REF
TCO
REF
T
DRIVE
F
OSC
V
SENSE
I
SENSE
V
FB
I
FB 2
V
IH
V
IL
dV
LN
I
OUT 3
I
DRIVE
V
DRIVE
C
DRIVE
dILD
Note
1
2
3
4
Limits
Typ
Max
Units
V
CC
Range
Quiescent Current
Shutdown Current
Efficiency
Reference tolerance
Reference Temp Co
Discharge pulse width
Operating Frequency
1.8V < V
CC
< 8V
30mA > I
LED
> 10mA
1.8V < V
CC
< 8V
V
CC
= 8V
1.8
8
220
4.5
80
V
A
A
%
-3.0
0.005
1.7
3.0
%
%/ C
s
200
kHz
Input parameters
Sense voltage
Sense input current
Feedback voltage
Feedback input current
Shutdown high voltage
Shutdown low voltage
Line voltage regulation
V
FB
= 0V, V
SENSE
= 0V
V
FB
= 0V, V
SENSE
= 0V
22
-1
291
-1.2
1.5
0
0.5
28
-7
300
34
-15
309
-4.5
V
CC
0.55
V
V
%/V
mV
A
mV
A
Output parameters
Output current
Transistor drive current
Transistor voltage drive
Mosfet gate drive cpbty
Load current regulation
Vin > 2V, Vout = 10.5V
Vdrive = 0.7V
1.8V < V
CC
< 8V
50
2
0
300
0.1
3.5
5
V
CC
-0.4
mA
mA
V
pF
mA/V
4
Excluding gate/base drive current.
I
FB
is typically half these values at 300mV.
System not device spec, including recommended transistors. 10.5V represents 3 white LEDs.
Change in LED current with changing supply voltage (LED V
F
x number of series LEDs).
ISSUE 1 - JANUARY 2003
2
DIODES [ DIODES INCORPORATED ]
