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WD3138 Datasheet(PDF) 5 Page - Will Semiconductor Ltd.

Part # WD3138
Description  White LED Driver with Digital and PWM Brightness Control in Tiny Package
PDF  23 Pages
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Manufacturer  WILLSEMI [Will Semiconductor Ltd.]
Direct Link  http://www.willsemi.com/index.php?siteid=2
Logo WILLSEMI - Will Semiconductor Ltd.

WD3138 Datasheet(HTML) 5 Page - Will Semiconductor Ltd.

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WD3138
Will Semiconductor Ltd.
5
Jun, 2015 - Rev. 1.0
Electronics Characteristics (Ta=25
oC, V
IN=3.6V, VEN=VIN, CIN=COUT=1μF, unless otherwise noted)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
Supply Current
Operation Voltage Range
VIN
2.7
--
5.5
V
Under Voltage Lockout
VUVLO
VIN Rising
1.8
2.2
2.5
V
UVLO Hysteresis
VUVLO-HYS
0.1
V
Quiescent Current
IQ
No Switching
0.4
1
mA
Supply Current
IS
Switching
1
2
mA
Shutdown Current
ISD
VEN < 0.4V
1
μA
Enable and Reference Control
EN Threshold Voltage
VENL
0.4
V
VENH
1.5
V
EN Pull-down Resistance
REN
800
k
Ω
EN Shutdown Pulse Width
tOFF
EN High to Low
2.5
ms
1-wire Digital Brightness
Detection Time
t1W_DET
EN Pin Low,
Note 1
260
μs
1-wire Digital Brightness
Detection Delay
t1W_DELAY
100
μs
1-wire Digital Brightness
Detection Window Time
t1W_WIN
1
ms
Voltage and Current Control
Feedback Reference
VREF
100% Full Scale
196
200
204
mV
1% Dimming
2
mV
Feedback Input Bias Current
IFB
2
μA
Operation Frequency
fOSC
500
600
700
kHz
Maximum Duty Cycle
DMAX
92
95
%
PWM Dimming Clock Rate
Recommended
5
100
KHz
PWM Dimming Duty Cycle
Recommended
1
100
%
Power Switch
On Resistance
RON
VIN=3.6V
0.6
Ω
N-channel Leakage Current
ILN_NFET
VLX=40V, TA=25ºC
1
μA
OC and OLP
Current Limit
ILIM
0.68
0.8
A
ILIM_START
Start-up
0.4
A
Open LED Protection
Threshold
VOLP
LED Open,
Measured on LX
36
38
40
V
1-wire Digital Timing
Start Time of Program Stream
tSTART
2
μs
End Time of Program Stream
tEOS
2
360
μs
Start Time of Data-Byte
Stream
tSOD
2
360
μs
High Time Low Bit
tH_LB
Logic 0
2
180
μs



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