PIC8518
High Efficiency, Fixed
Frequency WLED Driver
ELECTRICAL CHARACTERISTICS
(All specifications are at T
A
= +25°C. V
IN
= 5.0V, unless otherwise specified.)
Symbol
V
IN
UVLO
I
q
I
SH
F
OSC
D
MAX
V
FB
R
DS(ON)
I
LIM
V
OV
V
EN
I
EN
Parameter
Operating Input Voltage
Under Voltage Lock-out
UVLO Hysteresis
Supply Current(quiescent)
Supply Current(shut-down)
Operation Frequency
Maximum Duty Cycle
Feedback Voltage
Feedback Input Bias Current
MOSFET ON resistance
Current Limit
Over Voltage Threshold
Enable Threshold
Enable Input Bias Current
EN Hysteresis
Thermal Shut-down
Conditions
V
IN
going Low
No Switching
(V
IN
=5V,V
FB
=150mV)
V
EN
= 0
Min
2.5
Typ
2.2
235
0.4
1.2
95
104
1040
0.53
850
30
1.35
Max
5.5
2.4
80
260
1
1.4
114
Unit
V
V
mV
µA
µA
MHz
%
mV
nA
Ω
mA
V
V
µA
mV
°C
V
FB
=125mV
V
OV
rising
VEN Rising
VEN Rising, VIN=2.5V
V
EN
= 5V
1.04
85
94
600
1
0.8
1.6
6.5
4
165
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Road-8, House-2/A, Baridhara Diplomatic Area, Dhaka-1212, Phone: +880-2- 8861966, Fax: +880-2-8835244
2
PICSEMI [ POWER IC LTD. ]
