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SP7685ER-L Datasheet

  • SP7685ER-L

  • 1.2A Buck/Boost Charge Pump LED Driver

  • 12頁

  • SIPEX

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SP7685
1.2A Buck/Boost Charge Pump LED Driver
FEATURES
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Output Current up to 1.2A
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Up to 94% Efficiency in Torch Mode
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Adjustable FLASH Mode Current
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Minimum External Components: No Inductors
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Automatic Buck/Boost Mode Switchover
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Wide V
IN
Range: 2.7V to 5.5V
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High Frequency Operation: 2.4 MHz
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50mV Reference for low Loss Sensing
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I
Q
< 2渭A in Shutdown
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PWM Dimming Control
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Automatic Soft Start Limits Inrush Current
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Overvoltage Protection on Output
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Overcurrent/temperature Protection
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Low Ripple and EMI
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Ultra-low Dropout Voltage in Buck Mode
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2.6 Second Timeout in Flash Mode
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Space Saving RoHS Compliant, Lead Free
Package: 10-pin 3mm x 3mm DFN
VIN
C1
C2
FLASH
EN
1
2
3
4
5
10
VOUT
PGND
SGND
FB
RSET
SP7685
10 Pin DFN
9
8
7
6
APPLICATIONS
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White LED Torch/Flash for Cell
Phones, DSCs, and Camcorders
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White LED Backlighting
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Generic Lighting/Flash/Strobe
Applications
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General Purpose High Current Boost
DESCRIPTION
The SP7685 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 SP7685 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 SP7685 is offered in 10-pin DFN package.
TYPICAL APPLICATION CIRCUIT
V
IN
(3.0 - 4.2V)
O
C
IN
10渭F
V
IN
C
FC
1渭F
隴
V
OUT
C
OUT
10渭F
1A Flash
200mA Torch
PWF1 WLED
C1 SP7685 P
GND
C2
S
GND
FLASH
EN
FB
R
SET
R
SET
80K惟
TORCH/FLASH
ENABLE
R
SENSE
0.22惟
Date: 6/20/06 Rev T
SP7685, 1.2A Buck/BoostCharge Pump LED Driver
漏 2006 Sipex Corporation
1

SP7685ER-L 產(chǎn)品屬性

  • SP7685

  • 1

  • 集成電路 (IC)

  • PMIC - LED 驅(qū)動(dòng)器

  • -

  • -

  • -

  • 1

  • 是

  • 背光，閃燈/白光

  • 高亮度 LED（HBLED），白色 LED

  • 2.4MHz

  • 2.7 V ~ 5.5 V

  • -

  • 表面貼裝

  • 10-VFDFN 裸露焊盤

  • 10-DFN（3x3）

  • 散裝

  • -40°C ~ 85°C

  • 1016-1406

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