参数资料
型号: MAX1986ETE+T
厂商: Maxim Integrated
文件页数: 1/17页
文件大小: 0K
描述: IC LED DRVR WHITE BCKLGT 16-TQFN
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 2,500
拓扑: PWM,升压(升压)
输出数: 4
内部驱动器:
类型 - 主要: 背光
类型 - 次要: 白色 LED
频率: 800kHz ~ 1.2MHz
电源电压: 2.7 V ~ 5.5 V
安装类型: 表面贴装
封装/外壳: 16-WQFN 裸露焊盘
供应商设备封装: 16-TQFN-EP(4x4)
包装: 带卷 (TR)
工作温度: -40°C ~ 85°C
19-2761; Rev 0; 1/03
ATION
EVALU
AVAIL
KIT
ABLE
Ultra-High-Efficiency White
LED Drivers
General Description
The MAX1984/MAX1985/MAX1986 are white light-emit-
ting diode (LED) drivers that use individual regulators to
control the current of up to eight LEDs. A high-efficiency
step-up regulator generates just enough voltage to keep
all the current regulators in regulation. A versatile dim-
ming interface accommodates analog, digitally adjusted
Features
o Synchronous Step-Up Regulator
Achieves >95% Efficiency
Internal Switch and Synchronous Rectifier
Eliminates External MOSFETs and Diodes
1MHz Fixed Frequency Minimizes Component
Sizes
pulse-width modulation (DPWM), or parallel control.
o
Up to 90% Total LED Efficiency
The individual current regulators allow good current
matching between LEDs. Open or shorted LEDs cannot
affect the performance of other LEDs.
The step-up regulator achieves high efficiency by using
synchronous rectification. The internal N-channel switch
and P-channel synchronous rectifier eliminate the need
for external MOSFETs and diodes. The 1MHz switching
frequency allows the use of low-profile inductors and
ceramic capacitors.
The brightness can be easily adjusted using a multi-
mode dimming interface, which allows brightness control
through a DPWM signal, a 2- or 3-bit parallel control
interface, or an analog signal. The DPWM signal can be
connected directly to the control pin without the need for
an external RC filter if its frequency is 10kHz or above.
The MAX1984 drives up to eight LEDs, the MAX1985
drives up to six LEDs, and the MAX1986 drives up to
four LEDs. Each device has an LED select pin (SEL)
o Accurate LED Current Matching (8% max)
o Adjustable Maximum LED Current
o Multimode Dimming Control
Digital Pulse-Width Modulation Control
2-Bit Parallel Control
3-Bit Parallel Control
Analog Control
o Selectively Enable LEDs
o Open-LED Detection
o Unique 0.5mA LED Test Mode
o 2.7V to 5.5V Input Supply Range
o Small 4mm x 4mm 20-Pin Thin QFN Package
Ordering Information
that allows one subset, the other subset, or all LEDs to
be illuminated. All three devices are available in a
4mm ? 4mm thin QFN package.
Applications
PDAs and Hand-Held PCs
PART
MAX1984 ETP
MAX1985 ETP
MAX1986 ETE
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
20 Thin QFN
20 Thin QFN
16 Thin QFN
NO. OF
LEDs
8
6
4
Cellular Phones
Digital Cameras
Pin Configurations
TOP VIEW
20
19
18
17
16
20
19
18
17
16
16
15
14
13
OUT 1
15 BITB
OUT 1
15 BITB
LX 2
14 REF
LX 2
14 REF
OUT 1
12 BITA
GND 3
MAX1984
13 SETI
GND 3
MAX1985
13 SETI
LX 2
MAX1986
11 BITB
LD1 4
LD2 5
12 LD8
11 LD7
N.C. 4
LD1 5
12 N.C.
11 LD6
GND 3
LD1 4
10 REF
9 SETI
6
7
8
9
10
6
7
8
9
10
5
6
7
8
4mm x 4mm
THIN QFN
4mm x 4mm
THIN QFN
4mm x 4mm
THIN QFN
________________________________________________________________ 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
相关PDF资料
PDF描述
MAX4420EPA+ IC MOSFET DRVR SGL 6A HS 8-DIP
MAX4427EPA+ IC MOSFET DRVR DUAL NONINV 8-DIP
MAX5037EVKIT EVAL KIT FOR MAX5037
MAX5056AASA+ IC MOSFET DRVR DUAL 8-SOIC
MAX5062AASA+ IC DRIVER HALF BRDG HS 8-SOIC
相关代理商/技术参数
参数描述
MAX1987ETM 制造商:Maxim Integrated Products 功能描述:DUAL-PHASE CONTROLLER FOR IMVP-IV CPU - Rail/Tube
MAX1987ETM+ 制造商:Maxim Integrated Products 功能描述:DUAL-PHASE CONTROLLER FOR IMVP-IV CPU - Rail/Tube
MAX1987ETM+T 制造商:Maxim Integrated Products 功能描述:DUAL-PHASE CONTROLLER FOR IMVP-IV CPU - Tape and Reel 制造商:Maxim Integrated Products 功能描述:DUAL-PHASE QUICK-PWM CTRL TQFN48 PQM
MAX1987ETM-T 制造商:Maxim Integrated Products 功能描述:DUAL-PHASE CONTROLLER FOR IMVP-IV CPU - Tape and Reel
MAX1987EVKIT 制造商:Maxim Integrated Products 功能描述:DUAL-PHASE CONTROLLER FOR IMVP-IV C - Rail/Tube