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參數資料
| 型號： | MAX6946 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | 10端口、恒流LED驅動器和輸入/輸出擴展器，帶有PWM亮度控制 |
| 中文描述： | 10端口、恒流LED驅動器和輸入/輸出擴展器，帶有PWM亮度控制 |
| 文件頁數： | 1/24頁 |
| 文件大小： | 261K |
| 代理商： | MAX6946 |
General Description
The MAX6946/MAX6947 I2C-/SMBus
TM-compatible,
serial-interfaced peripherals provide microprocessors
with 10 I/O ports rated to 7V.
Each port can be configured as a 2.5mA to 20mA con-
stant-current LED driver (static or PWM), a 1.25mA to
10mA constant-current LED driver (static or PWM), an
open-drain logic output, or an overvoltage-protected
Schmitt logic input.
Analog and switching LED intensity control includes indi-
vidual 8-bit PWM control per output, individual 1-bit ana-
log current control (half/full scale) per output, and a global
3-bit DAC current control that applies to all LED outputs.
The MAX6946/MAX6947 can stagger the PWM timing of
the 10-port outputs in consecutively phased 45° incre-
ments. Staggering the outputs spreads the PWM load
currents over time in eight steps, helping to even out
the power-supply current and reduce the RMS current.
For a similar part with an SPI
TM-/QSPITM-/ or MICROWIRETM-
compatible interface, refer to the MAX6966/MAX6967
data sheet.
Applications
Features
2.25V to 3.6V Operation
I/O Ports Default to High Impedance (LEDs Off)
on Power-Up
I/O Port Inputs Are Overvoltage Protected to 7V
I/O Port Outputs Are 7V-Rated Open-Drain, 10mA
or 20mA Constant-Current Static/PWM LED
Drivers, or Open-Drain Logic Outputs
I/O Ports Support Hot Insertion
Individual 8-Bit PWM Intensity Control for Each LED
RST Input Clears Serial Interface and Can Exit
Shutdown (Warm Start)
MAX6946 OSC Input Allows for External PWM
Clock Input
MAX6947 AD0 Input Selects from Two Slave
Addresses
Auto Ramp-Up Out of Shutdown, and Up to 4s
Hold-Off Before Ramp-Down into Shutdown
0.8A (typ) Shutdown Current
-40°C to +125°C Temperature Range
Tiny WLP Package (4 x 4 Grid)
MAX6946/MAX6947
10-Port, Constant-Current LED Driver and
I/O Expander with PWM Intensity Control
________________________________________________________________ Maxim Integrated Products
1
Ordering Information
MAX6946
MAX6947
VDD
+3.3V
μC
SDA
VEXT = +5V
P0
P1
P2
P3
P4
P5
P6
P7
SCL
SDA
SCL
GND
OSC*
P8
P9
LOGIC INPUT
RST
AD0**
*MAX6946 ONLY.
**MAX6947 ONLY.
Typical Operating Circuit
19-0598; Rev 3; 2/08
+Denotes a lead-free package.
*EP = Exposed pad.
Note: All devices are specified over the -40°C to +125°C operating
temperature range..
EVALUATION
KIT
AVAILABLE
PART
PIN-PACKAGE
PKG
CODE
MAX6946ATE+
16 TQFN-EP*
T1633-4
MAX6946CAWE+
16 WLP
W162B2-1
MAX6947ATE+
16 TQFN-EP*
T1633-4
SMBus is a trademark of Intel Corp.
SPI and QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
Cellular Phones
Portable Equipment
RGB LED Drivers
LCD Backlights
Keypad Backlights
LED Status Indicators
(BUMPS ON BOTTOM)
16-BUMP, 2.1mm x 2.1mm WLP
VDD
SDA
RST
SCL
OSC
P0
P9
P1
P7
P2
P8
P3
P5
P4
P6
GND
TOP VIEW
A1
A2
A3
A4
B4
B3
B2
B1
C1
C2
C3
C4
D1
D2
D3
D4
MAX6946C
Pin Configurations
Pin Configurations continued at end of data sheet.
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.
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| MAX6946ATE+ | 功能描述:LED照明驅動器 10-Port Constant Current LED Driver 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: 安裝風格:SMD/SMT 封裝 / 箱體:SO-16N |
| MAX6946ATE+T | 功能描述:LED照明驅動器 10-Port Constant Current LED Driver 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: 安裝風格:SMD/SMT 封裝 / 箱體:SO-16N |
| MAX6946CAWE+ | 制造商:Maxim Integrated Products 功能描述:- Rail/Tube |
| MAX6946CAWE+T | 功能描述:LED照明驅動器 10-Port Constant Current LED Driver 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: 安裝風格:SMD/SMT 封裝 / 箱體:SO-16N |
| MAX6946EVCMAXQU+ | 功能描述:LED 照明開發工具 MAX6946 Evaluation Kit/Evaluation System RoHS:否 制造商:Fairchild Semiconductor 產品:Evaluation Kits 用于:FL7732 核心: 電源電壓:120V 系列: 封裝: |
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