AS3693B-ZTQW【PDF 4/33 页】IC LED CTLR 16-CH W/PWM 64EPTQFP

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AS3693B

Table of Contents

austria micro systems

1

2

3

4

5

General Description ....................................................................................................................................... 1

Key Features.................................................................................................................................................. 1

Applications.................................................................................................................................................... 1

Block Diagram................................................................................................................................................ 2

Characteristics ............................................................................................................................................... 4

5.1

5.2

5.3

Absolute Maximum Ratings .................................................................................................................... 4

Operating Conditions .............................................................................................................................. 5

Electrical Characteristics......................................................................................................................... 6

6

Typical Operation Characteristics .................................................................................................................. 8

6.1

6.2

6.3

6.4

Output current vs Output Voltage ........................................................................................................... 8

Vsupply vs VREG and V2.5 at startup .................................................................................................... 8

9us Slew Rate ......................................................................................................................................... 9

Supply Regulation ................................................................................................................................... 9

7

Block Description ......................................................................................................................................... 10

7.1

Feedback Circuit ................................................................................................................................... 10

7.1.1

7.1.2

Feedback Selection ....................................................................................................................... 11

Voltage fault registers .................................................................................................................... 12

7.2

7.3

Curreg 1-16........................................................................................................................................... 12

PWM – modes ...................................................................................................................................... 14

7.3.1

7.3.2

SYNC mode (PWM_MODE = 00) .................................................................................................. 14

ASYNC – mode (PWM_MODE = 01) ............................................................................................ 16

7.4

7.5

PWM – high time, period and delay registers ....................................................................................... 17

Shunt Regulator .................................................................................................................................... 18

7.5.1

Undervoltage lockout ..................................................................................................................... 18

7.6

7.7

Over temperature control ...................................................................................................................... 18

Device address setup ........................................................................................................................... 19

7.7.1

7.7.2

I2C Device Address setup ............................................................................................................. 19

SPI Device Address setup ............................................................................................................. 19

7.8

Digital interface ..................................................................................................................................... 20

7.8.1

7.8.2

I2C interface .................................................................................................................................. 20

SPI interface .................................................................................................................................. 22

8

9

Register map................................................................................................................................................ 24

Pinout and Packaging .................................................................................................................................. 27

9.1

9.2

9.3

Pinout.................................................................................................................................................... 27

Package drawing epTQFP64 ............................................................................................................... 29

Package drawing QFN64 ...................................................................................................................... 30

10 Ordering Information .................................................................................................................................... 31

Copyright............................................................................................................................................................. 32

Disclaimer ........................................................................................................................................................... 32

Contact Information ............................................................................................................................................. 32

www.austriamicrosystems.com

Revision 1.21 / 2011-09-30

3 - 32

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