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Will Semiconductor - 1000mA Buck/Boost Charge Pump Flash LED Driver

Numéro de référence WD3124DB
Description 1000mA Buck/Boost Charge Pump Flash LED Driver
Fabricant Will Semiconductor 
Logo Will Semiconductor 





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WD3124DB fiche technique
WD3124DB
1000mA Buck/Boost
Charge Pump Flash LED Driver
WD3124DB
Http//:www.sh-willsemi.com
Description
The WD3124DB 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 WD3124DB automatically switches modes
between step-up and step-down ensuring that LED
current does not depend on the forward voltage. It
switches at 2.2MHz, 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 WD3124DB 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 WD3124DB 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)
WD3124DB
3124DB = Device code
Y = Year code
W = Week code
Marking
Features
● Output Current up to 1000mA
● 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: 2.2MHz
● 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
WD3124DB-10/TR
Function
Without timeout
Package
Shipping
DFN3x3-10L
3000/Reel&Tape
Applications
Cellphones
PADs
1 Dec, 2014 - Rev. 1.1

PagesPages 13
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