MAX6946
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MAX6946

10-Port, Constant-Current LED Driver and I/O Expander with PWM Intensity Control

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Space-Saving, Constant-Current LED Driver with Reset

Info: : PRODUCTION tooltip
Info: : PRODUCTION tooltip
Part Details
Part Models 2
1ku List Price Starting From $3.03
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
  • Active-Low 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
  • 0.8µA (typ) Shutdown Current
  • -40°C to +125°C Temperature Range
  • Tiny WLP Package (4 x 4 Grid)
Additional Details
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The MAX6946/MAX6947 I²C-/SMBus™-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 constant-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 individual 8-bit PWM control per output, individual 1-bit analog 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° increments. 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™-/QSPI™-/ or MICROWIRE™-compatible interface, refer to the MAX6966/MAX6967 data sheet.

Applications

  • Cellular Phones
  • Keypad Backlights
  • LCD Backlights
  • LED Status Indicators
  • Portable Equipment
  • RGB LED Drivers
Part Models 2
1ku List Price Starting From $3.03

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
MAX6946ATE+
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Product Lifecycle

PCN

Jun 20, 2016

- 1612

ASSEMBLY

MAX6946ATE+

PRODUCTION

MAX6946ATE+T

PRODUCTION

Filter by Model

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Part Models

Product Lifecycle

PCN

Jun 20, 2016

- 1612

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ASSEMBLY

MAX6946ATE+

PRODUCTION

MAX6946ATE+T

PRODUCTION

Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 1

MAX6946EVKIT

MAX6946 Evaluation Kit/Evaluation System

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MAX6946EVKIT

MAX6946 Evaluation Kit/Evaluation System

MAX6946 Evaluation Kit/Evaluation System

Features and Benefits

  • Proven PCB Layout
  • Windows 98SE/2000/XP-Compatible Evaluation Software
  • Three RGB LEDs and One White LED
  • Access to I²C Interface Signals
  • Header for Accessing to the MAX6946 10 I/O Ports
  • Fully Assembled and Tested

Product Detail

The MAX6946 evaluation (EV) kit is an assembled and tested PCB that demonstrates the capabilities of the MAX6946 constant-current LED driver and digital I/O expander. The EV kit includes three RGB LEDs and one white LED that can be controlled simultaneously by the MAX6946. The MAX6947 can also be evaluated on the EV kit board by replacing the MAX6946 IC.

The MAX6946 evaluation system (EV system) includes a MAX6946 EV kit and a Maxim interface board (CMAXQUSB). The CMAXQUSB board connects to a PC’s USB port and allows the transfer of I²C commands to the MAX6946 EV kit.

The CMAXQUSB board allows a PC to use its USB port to emulate an I²C 2-wire interface. Windows® 98SE/2000/XP-compatible software (which can be downloaded from www.maximintegrated.com/evkitsoftware) provides a user-friendly interface to exercise the features of the MAX6946. The program is menu driven and offers a graphical user interface (GUI) with control buttons and a status display. Order the MAX6946EVCMAXQU+ for a complete PC-based evaluation kit of the MAX6946. Order the MAX6946EVKIT+ if you already have a CMAXQUSB interface board or an I²C-compatible 2-wire interface system.

Applications

  • Cellular Phones
  • Keypad Backlights
  • LCD Backlights
  • LED Status Indicators
  • Portable Equipment
  • RGB LED Drivers

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