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SC604A 데이터시트(PDF) 1 Page - Semtech Corporation

부품명 SC604A
상세설명  Low Noise, High Efficiency Regulated White LED Driver
PDF  18 Pages
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제조업체  SEMTECH [Semtech Corporation]
홈페이지  http://www.semtech.com
Logo SEMTECH - Semtech Corporation

SC604A 데이터시트(HTML) 1 Page - Semtech Corporation

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United States Patents: 6,504,422, 6,794,926
www.semtech.com
POWER MANAGEMENT
OBJECTIVE -NOVEMBER
9, 2000
SC604A
Low Noise, High Efficiency
Regulated White LED Driver
Features
June 27, 2005
Description
Applications
Typical Application Circuit
The SC604A is a very high efficiency charge pump white
LED driver driver from the mAhXLifeTM family of products,
optimized for Li-Ion battery applications.
The four (4) LED outputs are current matched for consis-
tent LED brightness. Extremely low battery current is
achieved by automatically reconfiguring the charge pump
to match circuit conditions. Using four LEDs, each at
20mA for a total I
OUT= 80mA, the SC604A can use less
than 83mA from the supply for most of the battery life.
Patented low noise mode switching circuitry and constant
output current allow the use of extremely small input and
output capacitors.
Very high efficiency over 90% of battery life
Peak efficiency over 92%
Current regulation for up to 4 LEDs
Digital 3 bit output control logic
Current matching tolerance of ±3% typical
Wide current range per LED [0.5mA - 30mA]
High available total LED current = 4 I
LED = 120mA
Low Shutdown Current: 1µA typical
Soft start / In-rush current limiting
Short circuit protection
MLP-16 [4x4] Package
Fixed frequency 250kHz
1x, 1.5x and 2x charge pump modes of operation
Cellular phones
LED backlighting
PDA power supplies
Portable devices
Electronic books
Wireless web appliances
LCD Modules
Patent Pending
VIN
EN
CTRL0
CTRL1
BATTERY
1
µF
CTRL2
GND
ILED1
ILED2
ILED3
ILED4
VOUT
C1+
C1-
C2+
C2-
SC604A
1
µF
1
µF
1
µF
ISET


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