PIC8518
High Efficiency, Fixed
Frequency WLED Driver
ELECTRICAL CHARACTERISTICS
(All specifications are at TA = +25°C. VIN = 5.0V, unless otherwise specified.)
Symbol
VIN
UVLO
Parameter
Conditions
VIN going Low
Min
2.5
Typ
2.2
Max
5.5
2.4
80
Unit
V
V
mV
µA
Operating Input Voltage
Under Voltage Lock-out
UVLO Hysteresis
Iq
Supply Current(quiescent)
No Switching
(VIN=5V,VFB=150mV)
VEN = 0
235
260
ISH
Supply Current(shut-down)
Operation Frequency
Maximum Duty Cycle
Feedback Voltage
Feedback Input Bias Current VFB=125mV
MOSFET ON resistance
Current Limit
Over Voltage Threshold
Enable Threshold
0.4
1.2
95
104
1040
0.53
850
30
1
1.4
µA
MHz
%
mV
nA
Ω
FOSC
DMAX
VFB
1.04
85
94
114
600
RDS(ON)
ILIM
VOV
mA
V
VOV rising
VEN Rising
VEN Rising, VIN=2.5V
VEN = 5V
VEN
1
0.8
1.35
1.6
6.5
V
IEN
Enable Input Bias Current
EN Hysteresis
Thermal Shut-down
µA
mV
°C
4
165
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