參數(shù)資料
型號(hào)： MAX1848ETA
廠商： MAXIM INTEGRATED PRODUCTS INC
元件分類： 穩(wěn)壓器
英文描述： Replaced by TMS320VC5506 : DSP (DSP Only) for Embedded V90 Modem Solution [Not Recommended For New Designs (NRND)] 144-BGA MICROSTAR
中文描述： 0.85 A SWITCHING REGULATOR, 1600 kHz SWITCHING FREQ-MAX, QCC8
封裝： 3 X 3 MM, 0.80 MM HEIGHT, TQFN-8
文件頁(yè)數(shù)： 1/9頁(yè)
文件大?。?/td> 323K
代理商： MAX1848ETA
General Description
The MAX1848 drives white LEDs with a constant cur-
rent to provide backlight in cell phones, PDAs, and
other hand-held devices. The step-up converter topology
allows series connection of the white LEDs so that the
LED currents are identical for uniform brightness. This
configuration eliminates the need for ballast resistors
and expensive factory calibration. Other benefits
include greater simplicity, lower cost, higher efficiency,
and greater reliability.
This step-up PWM converter includes an internal, high-
voltage, low R
DSON
N-channel MOSFET switch for high
efficiency and maximum battery life. A single analog
voltage Dual Mode
input provides a simple means of
brightness adjustment and on/off control. Fast 1.2MHz
current-mode PWM control allows for small input and
output capacitors and a small inductor while minimizing
ripple on the input supply/battery. Programmable soft-
start eliminates inrush current during startup.
The MAX1848 is available in space-saving 8-pin thin
QFN (3mm
3mm) and 8-pin SOT23 packages.
Applications
Cell Phones and Smart Phones
PDAs, Palmtops, and Wireless Handhelds
e-Books and Subnotebooks
White LED Display Backlighting
Features
o
Constant Current Regulation for Uniform
Illumination
o
High 87% Efficiency
o
Analog or Logic Control of LED Intensity
o
0.8W Output Power with Internal High-Voltage
MOSFET Switch
o
Small, Low-Profile External Components
o
2.6V to 5.5V Input Range
o
13V Maximum Output with Overvoltage Protection
o
Optimized for Low Input Ripple
o
Programmable Soft-Start
o
0.3μA Shutdown Current
o
Small 8-pin Thin QFN (3mm
3mm) and
8-Pin SOT23 Packages
M
White LED Step-Up Converter in SOT23
________________________________________________________________
Maxim Integrated Products
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
1
GND
PGND
LX
1
2
8
7
V+
CS
CTRL
OUT
COMP
SOT23
TOP VIEW
3
4
6
5
MAX1848
GND
PGND
LX
1
2
8
7
V+
CS
CTRL
OUT
COMP
THIN QFN
3
4
6
5
MAX1848
Pin Configuration
Ordering Information
V+
CTRL
COMP
LX
OUT
PGND
GND
CS
2.6V to 5.5V
LOGIC
OR DAC
C
IN
3.3
μ
F
C
COMP
0.15
μ
F
L1
33
μ
H
C
OUT
1
μ
F
R
SENSE
5
D1
MAX1848
Typical Application Circuit
19-2028; Rev 1; 9/02
PART
TEMP RANGE
PIN-PACKAGE
TOP
MARK
MAX1848EKA
-40
°
C to +85
°
C
8 SOT23
8 Thin QFN
(3mm
3mm)
AAIM
MAX1848ETA
-40
°
C to +85
°
C
ACR
Note:
Hand soldering is not recommended for the MAX1848
SOT23 package.
Dual Mode is a trademark of Maxim Integrated Products, Inc.
相關(guān)PDF資料
PDF描述
MAX1848EKA White LED Step-Up Converter in SOT23
MAX1855 Fixed-Point Digital Signal Processor 352-FC/CSP 0 to 0
MAX1854EEG High-Speed, Adjustable, Synchronous Step-Down Controllers with Integrated Voltage Positioning
MAX1855EEG Replaced by TMS320C6202B : Fixed-Point Digital Signal Processor 352-FCBGA
MAX1854 High-Speed, Adjustable, Synchronous Step-Down Controllers with Integrated Voltage Positioning
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX1848ETA+ 制造商:Maxim Integrated Products 功能描述:LED DRVR 3SEGMENT 2.6V TO 5.5V 8PIN SOT-23 - Rail/Tube
MAX1848ETA+T 功能描述:LED照明驅(qū)動(dòng)器 White LED Step-Up RoHS:否 制造商:STMicroelectronics 輸入電壓:11.5 V to 23 V 工作頻率: 最大電源電流:1.7 mA 輸出電流: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SO-16N
MAX1848ETA-T 功能描述:LED照明驅(qū)動(dòng)器 White LED Step-Up RoHS:否 制造商:STMicroelectronics 輸入電壓:11.5 V to 23 V 工作頻率: 最大電源電流:1.7 mA 輸出電流: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SO-16N
MAX1848EVKIT 功能描述:LED 照明開(kāi)發(fā)工具 Evaluation Kit for the MAX1848 RoHS:否 制造商:Fairchild Semiconductor 產(chǎn)品:Evaluation Kits 用于:FL7732 核心: 電源電壓:120V 系列: 封裝:
MAX184ACNG 功能描述:模數(shù)轉(zhuǎn)換器 - ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32
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