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SP6685ERTR Datasheet

  • SP6685ERTR

  • Charge Pump LED Driver For Camera Flash

  • 10頁

  • SIPEX

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廬
Preliminary
SP6685
Charge Pump LED Driver For Camera Flash
FEATURES
VIN
1
10
VOUT
鈻?/div>
High Output Current Charge Pump: 700mA
C1
2
9
PGND
鈻?/div>
Adjustable FLASH mode
SP6685
鈻?/div>
x1 and x2 Automatic Modes for High Efficiency
8
SGND
C2
3
10 Pin DFN
鈻?/div>
Minimum External Components: No Inductors
7
FB
FLASH
4
鈻?/div>
High Frequency Operation: 2.4 MHz
6
RSET
EN
5
鈻?/div>
Low 50mV reference for low loss sensing
鈻?/div>
1
碌A
shutdown current
Now Available in Lead Free Packaging
鈻?/div>
PWM Dimming Control
鈻?/div>
Over voltage protection on output
APPLICATIONS
鈻?/div>
Over current protection
鈻?/div>
LED Torch/Flash for Cell
鈻?/div>
Over temperature protection
Phones, DSCs, and Camcorders
鈻?/div>
Space Saving 10-pin 3mm x 3mm DFN
鈻?/div>
Generic Lighting/Flash/Strobe
Package
Applications
DESCRIPTION
The SP6685 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 SP6685 automatically switches modes between step-up
and step-down ensuring that LED current does not depend on the forward voltage. A low
current sense reference voltage (50mV) allows the use of small 0603 current sensing
resistors. The SP6685 is offered in 10-pin DFN package.
TYPICAL APPLICATION CIRCUIT
V
IN
(2.7 - 4.3V)
V
IN
C
FC
1碌F
C1
C2
FLASH
EN
廬
C
IN
4.7碌F
V
OUT
C
OUT
1碌F
D1
1W LED
SP6685 P
GND
S
GND
FB
R
SET
TORCH/FLASH
ENABLE
V
REF
= 50 - 150mV
R
SET
88.7K
R
SENSE
0.22
鈩?/div>
Date: 12/15/04
SP6685 Charge Pump LED Driver for Camera Flash
漏 Copyright 2004 Sipex Corporation
1

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