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參數(shù)資料
| 型號： | SC614DB |
| 廠商： | Semtech Corporation |
| 英文描述： | Low Noise Backlight and Flash Driver With Serial Interface |
| 中文描述： | 低噪聲背光和閃光串行接口驅(qū)動程序 |
| 文件頁數(shù)： | 1/25頁 |
| 文件大?。?/td> | 395K |
| 代理商： | SC614DB |
1
POWER MANAGEMENT
Description
SC614
Low Noise Backlight and Flash
Driver With Serial Interface
United States Patent No. 6,504,422
www.semtech.com
April 28, 2006
Features
Four independent current sinks for main backlight,
adjustable from 0.4mA to 32mA each
Dedicated MDIM pin for PWM dimming of main
backlight
Three independent current sinks for sub-backlight
or flash, adjustable from 0.4mA to 102mA each
Configurable sub-backlight or flash sinks
Dedicated SDIM pin for PWM dimming of sub-
backlight
Dedicated FL pin for flash control
Current accuracy to within ±1.5% down to 4.8mA
Current matching to within ±0.5% down to 4.8mA
Very high efficiency over 90% of battery life
Shutdown current 0.1
μ
A (typ)
Three charge pump operating modes: 1x, 1.5x,
and 2x
I
2
C serial interface
Soft-start/in-rush current limiting
1.33MHz and 250kHz programmable fixed
frequency options
Short-circuit/thermal protection
Output open circuit protection
MLPQ-24 package (4mm x 4mm), fully WEEE and
RoHS compliant
Cellular phone backlighting and flash
LCD modules
PDA backlighting and flash
RGB LED Driver
The SC614 is a high efficiency charge pump LED driver
using Semtech’s proprietary mAhXLife
TM
technology.
Performance is optimized for use in Li-ion battery
applications.
Each of 7 LED currents can be programmed via the
I
2
C serial control bus. M1 through M4 are for LED
backlighting of LCD main displays. S1/FL3 through
S3/FL1 can be used for backlighting sub displays and/
or for driving flash LEDs. These three current sinks are
configurable over the I
2
C interface for any combination
of pins for sub or flash use.
The charge pump automatically selects an operating
mode based on the number of active loads, input
voltage, and load currents required. Any combination of
LED drivers can be enabled at one time, allowing the
SC614 to power any combination of backlight and flash
required by the application.
Two dedicated pins, MDIM and SDIM, are provided to
allow PWM dimming of the main and sub-backlights and
one dedicated pin, FL, allows direct control of the flash.
All three pins can be utilized without having to use the
I
2
C interface once the registers are set up.
The enable pin can be used to put the device in
low-current shutdown mode drawing 0.1
μ
A (typ), or a reg-
ister can be written that sets the device in a sleep mode
that reduces the current to 50
μ
A (typ).
D1
LED
C2
1u
D2
LED
D3
LED
D4
LED
D5
LED
32mA Max
32mA Max
32mA Max
32mA Max
306mA Max.
C1
2u2
C3 1u
C4 1u
VIN
11
VIN
17
EN
2
SDA
7
SCL
8
ASEL
5
SDIM
3
MDIM
4
FL
6
VOUT
9
VOUT
16
M1
1
M2
24
M3
23
M4
22
S1/FL3
20
S2/FL2
19
S3/FL1
18
GND
12
GND
21
T
C
1
C
1
C
1
C
1
U1
SC614
EN
SDA
SCL
SDIM
FL
MDIM
328mA Max Continuous
VBAT
R1
Pull-up
R2
Pull-up
VLOGIC
Note: R1 and R2
pull-up resistors are a
requirement of the I2C
specification
MAIN BACKLIGHT
FLASH
Typical Application Circuit
Applications
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SC614EVB | Low Noise Backlight and Flash Driver With Serial Interface |
| SC614MLTRT | Low Noise Backlight and Flash Driver With Serial Interface |
| SC615A | Charge Pump Flash LED Driver |
| SC615AEVB | Charge Pump Flash LED Driver |
| SC615AMLTRT | Charge Pump Flash LED Driver |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SC614EVB | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:Low Noise Backlight and Flash Driver With Serial Interface |
| SC614MLTRT | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:Low Noise Backlight and Flash Driver With Serial Interface |
| SC614-R | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Speech And Music Processor |
| SC614-RL1 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Speech And Music Processor |
| SC615 | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:Charge Pump Flash LED Driver |
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