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PDF WD3124DA Datasheet ( Hoja de datos )

Número de pieza WD3124DA
Descripción 1000mA Buck/Boost Charge Pump Flash LED Driver
Fabricantes WillSEMI 
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WD3124DA datasheet

1 Page

WD3124DA pdf
WD3124DA
Electronics Characteristics
(Full= -40to +85VIN= 3.6V, CIN = 4.7uF, CF = COUT = 1uF, VEN= VIN, typical values at +25unless
otherwise noted)
Parameter
Symbol
Conditions
Min. Typ. Max. Units
Input Voltage Range
Quiescent Current
VIN 2.7 5.5 V
IQ
VIN=2.7V-5.5V FLASH=GND,
1X Mode ILOAD=100uA
0.3 mA
IQ FLASH = High, 2x mode
2 mA
Shutdown Supply Current
ISHDN
VEN = 0V, VIN=5.5V
1 uA
Feedback
Voltage
reference
VFB
FLASH = VIN, RSET = 68kΩ
FLASH = GND
175 190 205 mV
45 50 55 mV
FB Pin Current
Oscillator Frequency
Charge Pump Equivalent
Resistance (1× mode)
IFB
fOSC
VFB = 0.3V
VIN = 3.6V
1 uA
2.2 MHz
0.5 0.7 Ω
Charge Pump Equivalent
Resistance (2× mode)
EN, FLASH Logic Low
EN, FLASH Logic High
EN, FLASH Pin Current
VOUT Turn-on Time
VEN,FLASH H
VEN,FLASH L
IEN,FLASH
VIN = 3.6V, FB within 90% of
regulation
0.4
1.3
1
250
V
V
uA
us
Thermal Shutdown
Temperature
Maximum Flash ON time
TSHDN
VIN = 3.6V
150
0.8 1.2 1.6
oC
S
Will Semiconductor Ltd.
5 Dec, 2014 - Rev. 1.1

5 Page

WD3124DA arduino
Reference RSET Resistor:
WD3124DA
Part Reference
RSET
RSET
RSET
RSET
RSET
RSET
RSET
RSET
RSET
Value
(Ω)
62k
68K
75K
82K
91K
100K
120K
140K
150K
Package
Tolerance
Size
5% 0402
5% 0402
5% 0402
5% 0402
5% 0402
5% 0402
5% 0402
5% 0402
5% 0402
Flash Current (mA) @ RSENSE =
0.22Ω 0.27 Ω 0.33 Ω 0.39 Ω 0.47 Ω
940 766 627 530
440
859 700 572 484
402
778 634 518 438
363
712 580 474 401
333
640 522 427 361
300
584 476 389 329
273
486 396 324 274
227
416 340 278 235
195
389 317 259 219
182
Reference RSENSE Resistor:
Part Reference
RSENSE
RSENSE
RSENSE
RSENSE
RSENSE
Value (Ω)
0.22
0.27
0.33
0.39
0.47
Tolerance
5%
5%
5%
5%
5%
Package Size
0603
0603
0603
0603
0603
Torch Current (mA)
227
185
151
128
106
Will Semiconductor Ltd.
11 Dec, 2014 - Rev. 1.1

11 Page





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