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WillSEMI - 800mA Buck/Boost Charge Pump Flash LED Driver

Numéro de référence WD3609DC
Description 800mA Buck/Boost Charge Pump Flash LED Driver
Fabricant WillSEMI 
Logo WillSEMI 





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WD3609DC fiche technique
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 -40to +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

PagesPages 13
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