파트넘버.co.kr WD3609DC 데이터시트 PDF


WD3609DC 반도체 회로 부품 판매점

800mA Buck/Boost Charge Pump Flash LED Driver



WillSEMI 로고
WillSEMI
WD3609DC 데이터시트, 핀배열, 회로
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


WD3609DC 데이터시트, 핀배열, 회로
Pin configuration (Top view)
WD3609DC
VIN 1
C1 2
C2 3
FLASH 4
EN 5
GND
10 VOUT
9 PGND
8 SGND
7 FB
6 RSET
Pin descriptions
Symbol
VIN
C1
C2
FLASH
EN
RSET
FB
SGND
PGND
VOUT
DFN3x3-10L
1
2
3
4
5
6
7
8
9
10
Descriptions
Input voltage for the charge pump. Decouple with 4.7μF or 10μF ceramic
capacitor close to the pins of the IC.
Positive input for the external flying capacitor. Connect a ceramic 1μF
capacitor close to the pins of the IC.
Negative input for the external flying capacitor. Connect a ceramic 1μF
capacitor close to the pins of the IC.
Logic input to toggle operation between FLASH and TORCH mode. In
TORCH mode FB is regulated to the internal 50mV reference. In FLASH
mode FB reference voltage can be adjusted by changing the resistor from
RSET pin to ground. Choose the external current sense resistor (RSENSE) based
on desired current in TORCH mode and Flash mode.
Shutdown control input. Connect to VIN for normal operation, connect to
ground for shutdown. For normal operation, suggest connecting to VIN only
after the VIN has settled if the VIN ramping up is slow.
Connect a resistor from this pin to ground. When in FLASH mode (FLASH =
High) this resistor sets the current regulation point according to the following:
VFB =(1.26V / RSET)x11.2
Feedback input for the current control loop. Connect directly to the current
sense resistor.
Internal ground pin. Control circuitry returns current to this pin.
Power ground pin. Flying capacitor current returns through this pin.
Charge Pump Output Voltage. Decouple with an external capacitor. At least
1μF is recommended. If Higher value capacitor is used, output ripple is
smaller.
Will Semiconductor Ltd.
2 Apr, 2016 - Rev. 1.1




PDF 파일 내의 페이지 : 총 13 페이지

제조업체: WillSEMI

( willsemi )

WD3609DC led

데이터시트 다운로드
:

[ WD3609DC.PDF ]

[ WD3609DC 다른 제조사 검색 ]




국내 전력반도체 판매점


상호 : 아이지 인터내셔날

전화번호 : 051-319-2877

[ 홈페이지 ]

IGBT, TR 모듈, SCR, 다이오드모듈, 각종 전력 휴즈

( IYXS, Powerex, Toshiba, Fuji, Bussmann, Eaton )

전력반도체 문의 : 010-3582-2743



일반적인 전자부품 판매점


디바이스마트

IC114

엘레파츠

ICbanQ

Mouser Electronics

DigiKey Electronics

Element14


관련 데이터시트


WD3609DC

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