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| 型号： | MAX6974ATL+ |
| 厂商： | Maxim Integrated |
| 文件页数： | 1/23页 |
| 文件大小： | 0K |
| 描述： | IC LED DRIVER LINEAR 40-TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 50 |
| 拓扑： | PWM |
| 输出数： | 24 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 通用 |
| 类型 - 次要： | RGB |
| 频率： | 33MHz |
| 电源电压： | 3 V ~ 3.6 V |
| 输出电压： | 7V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 40-WFQFN 裸露焊盘 |
| 供应商设备封装： | 40-TQFN-EP（6x6） |
| 包装： | 管件 |
| 工作温度： | -40°C ~ 125°C |
| 产品目录页面： | 1424 (CN2011-ZH PDF) |
19-0555; Rev 2; 10/07
ATION
EVALU
AVAILA
KIT
BLE
24-Output PWM LED Drivers
for Message Boards
General Description
The MAX6974/MAX6975 precision current-sinking,
24-output PWM LED drivers drive red, green, and blue
LEDs for full-color graphic message boards and video
displays. Each output has an individual 12-bit (MAX6974)
or 14-bit (MAX6975) PWM-intensity (hue) control and
7-bit (MAX6974) or 5-bit (MAX6975) global PWM intensity
(luminance) control. The MAX6974/MAX6975 feature a
high-speed, fully buffered cascadable serial interface,
open-circuit LED fault detection circuitry, as well as a
watchdog timer.
The driver has three banks of eight outputs, with each
bank intended to drive a different color in RGB applica-
tions. The full-scale current for each bank of eight out-
puts is adjustable from 6mA to 30mA in 256 steps
(0.3125% per step) to calibrate each color.
The MAX6974/MAX6975 can optionally multiplex by
using outputs MUX0 and MUX1 , which each drive an
external pnp transistor. Multiplexing doubles the
MAX6974/MAX6975 drive capability to 48 LEDs.
The MAX6974/MAX6975 operate from a 3.0V to 3.6V
power supply. The LED power supply can range from
3V to 7V. The LED drivers require only 0.8V headroom
Features
? 24 LED Current Sink Outputs (Three Banks of
Eight Outputs)
? 48 LED Drive Option When Multiplexing
? 33MHz Clock Supports Up to 63 Frames per
Second of Video
? Constant Output Current Calibration from 6mA to
30mA in 256 Steps
? EZCascade? Interface Simplifies Multiple Driver
Cascading Without External Buffers
? 12-Bit or 14-Bit Individual PWM LED Intensity
Controls
? 7-Bit or 5-Bit Panel PWM-Intensity Control
? +3V to +7V LED Power Supply
? +3.0V to +3.6V Logic Supply
? Open-Circuit LED Fault Detection
? Optional Watchdog Timer Blanks Display if
Interface Fails
? Standard -40°C to +125°C Operating Temperature
Range
Ordering Information
above the LEDs’ forward-voltage drop. Using a sepa-
rate LED supply voltage for each LED minimizes power
consumption.
The serial interface uses differential signaling for the
high-speed clock and data signals to reduce EMI and
PART
MAX6974 ATL+
MAX6975 ATL+
TEMP RANGE
-40°C to +125°C
-40°C to +125°C
PIN-
PACKAGE
40 TQFN-EP*
40 TQFN-EP*
PKG
CODE
T4066-3
T4066-3
improve signal integrity. The MAX6974/MAX6975 buffer
all interface signals to simplify cascading devices in
modules that use a large number of drivers.
An internal watchdog timer, when enabled, automatically
clears the pixel-data registers and blanks the display if
any of the signal inputs fail to toggle within 40ms.
*EP = Exposed paddle.
+Denotes a lead-free package.
TOP VIEW
Pin Configuration
The MAX6974/MAX6975 are available in 40-pin TQFN
packages and operate over the -40°C to +125°C
temperature range.
Refer to the MAX6972/MAX6973 data sheet for a
16-output, 11mA to 55mA software-compatible device.
EZCascade is a trademark of Maxim Integrated Products, Inc.
Applications
AGND 31
B7 32
B6 33
B5 34
B4 35
B3 36
B2 37
30 29 28 27 26 25 24 23 22 21
EP*
MAX6974ATL/
MAX6975ATL
20 G4
19 G3
18 G2
17 G1
16 G0
15 R7
14 R6
LED Video Display Panels
LED Message Boards
Variable Message Signs (VMS)
Signs
B1 38
B0 39
V DD 40
1
2
+
3
4
5
6
7
8
9
10
13 R5
12 R4
11 R3
Graphic Panels
TQFN-EP
Typical Operating Circuit appears at the end of data sheet.
*EP = EXPOSED PADDLE.
________________________________________________________________ Maxim Integrated Products
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
1
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| MAX6974ATL+ | 功能描述:LED照明驱动器 24-Output PWM LED Driver RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N |
| MAX6974ATL+T | 功能描述:LED照明驱动器 24-Output PWM LED Driver RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N |
| MAX6974ATL-T | 制造商:Maxim Integrated Products 功能描述:24-OUTPUT PWM LED DRIVERS FOR MESSA - Tape and Reel |
| MAX6974EVKIT | 功能描述:LED 照明开发工具 MAX6974 Evaluation Kit RoHS:否 制造商:Fairchild Semiconductor 产品:Evaluation Kits 用于:FL7732 核心: 电源电压:120V 系列: 封装: |
| MAX6974EVKIT+ | 功能描述:LED 照明开发工具 MAX6974 Evaluation Kit RoHS:否 制造商:Fairchild Semiconductor 产品:Evaluation Kits 用于:FL7732 核心: 电源电压:120V 系列: 封装: |
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