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PDF WD3609DC Data sheet ( Hoja de datos )
| Número de pieza | WD3609DC | |
| Descripción | 800mA Buck/Boost Charge Pump Flash LED Driver | |
| Fabricantes | WillSEMI | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de WD3609DC (archivo pdf) en la parte inferior de esta página. Total 13 Páginas | ||
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WD3609DC
800mA Buck/Boost
Charge Pump Flash LED Driver
WD3609DC
Http//:www.sh-willsemi.com
Description
The WD3609DC is a current-regulated charge pump
ideal for powering high brightness LEDs for camera
flash applications. The charge pump can be set to
regulate two current levels for FLASH and TORCH
modes.
The WD3609DC automatically switches modes
between step-up and step-down ensuring that LED
current does not depend on the forward voltage. It
switches at 2.4MHz, allowing the use of tiny
components. The supply voltage ranges from 2.7V to
5.5V and is ideally suited for all applications powered
by a single LI-Ion battery cell or three to four NiCd,
NiMH, or Alkaline battery cells.
The WD3609DC also features a very low shutdown
current, an automatic soft-start mode to limit inrush
current, as well as over current, over voltage and
over-Thermal shutdown control.
A low current sense reference voltage (50mV) allows
the use of small 0603 current sensing resistors.
The WD3609DC is available in Green DFN3×3-10L
package and is specified over an ambient temperature
range of -40℃ to +85℃.
DFN3x3-10L
VIN 1
C1 2
C2 3
FLASH 4
EN 5 GND
10 VOUT
9 PGND
8 SGND
7 FB
6 RSET
Pin configuration (Top view)
3609
DAYW
WD3609DC
3609DC = Device code
Y = Year code
W = Week code
Marking
Features
● Output Current up to 800mA
● Up to 95% Efficiency in Torch Mode
● Adjustable FLASH Mode Current
● Automatic Buck/Boost Mode Switchover
● Wide Input Voltage Range: 2.7V to 5.5V
● Minimum External Components: No Inductors
● High Frequency Operation: 2.4MHz
● Low 50mV Reference for Low Loss Sensing
● PWM Dimming Control
● Automatic Soft Start Limits Inrush Current
● Low Ripple and EMI
Will Semiconductor Ltd.
Order Information
Device
WD3609DC-10/TR
Function
With timeout
Package
DFN3x3-10L
Shipping 3000/Reel&Tape
Applications
Cellphones
PADs
1 Apr, 2016 - Rev. 1.1
1 page  
WD3609DC
Electronics Characteristics
(Full= -40℃ to +85℃ ，VIN= 3.6V, CIN = 4.7uF, CF = COUT = 1uF, VEN= VIN,
otherwise noted)
typical values at +25℃，unless
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
Feedback
Voltage
reference
ISHDN
VFB
VEN = 0V, VIN=5.5V
FLASH = VIN, RSET = 82kΩ
FLASH = GND
1
163 170 187
45 50 55
uA
mV
mV
FB Pin Current
Oscillator Frequency
Charge Pump Equivalent
Resistance (1× mode)
IFB
fOSC
VFB = 0.3V
VIN = 3.6V
1 uA
2.4 MHz
0.8 1
Ω
Charge Pump Equivalent
Resistance (2× mode)
5Ω
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
TSHDN
150 oC
Maximum Flash ON time
Current Limit
Ilimit
VIN = 3.6V
VIN=3.6 V
0.8 1.2 1.6
0.85 1.2 1.5
S
A
Will Semiconductor Ltd.
5 Apr, 2016 - Rev. 1.1
5 Page 
Reference RSET Resistor:
WD3609DC
Part Reference
RSET
RSET
RSET
RSET
RSET
RSET
RSET
Value
(Ω)
75K
82K
91K
100K
120K
140K
150K
Package
Tolerance
Size
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
850 692 566 479
397
777 633 518 438
363
700 570 466 394
327
636 518 424 358
297
531 433 354 300
248
457 370 303 256
212
422 343 281 238
197
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 Apr, 2016 - Rev. 1.1
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet WD3609DC.PDF ] | |
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