CAT9532YI-T2 datasheet(11/14 Pages) ONSEMI

Part #	CAT9532YI-T2

Description	16-bit Programmable LED Dimmer

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Manufacturer	ONSEMI [ON Semiconductor]

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CAT9532

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Application Information

Programming Example

The following programming sequence is an example how

to set:

• LED0 to LED3: ON

• LED4 to LED7: Dimming at 30% brightness; Blink 1:

152 Hz, duty cycle 30%

• LED8 to LED11: Blink at 2 Hz with 50% duty cycle

(Blink 2)

• LED12 to LED15: OFF

Figure 14. Typical Application

5 V

LED0

LED1

LED2

LED3

LED4

LED5

LED6

LED7

LED8

LED9

LED10

LED11

LED12

LED13

LED14

LED15

A2

A1

A0

SDA

SCL

CAT9532

SDA

SCL

GND

10 k

W (x 3)

GPIOs

RESET

VCC

VSS

I2C/SMBus

MASTER

Command Description

I2C Data

1

START

2

Send Slave address, A0−A2 = low

C0h

3

Command Byte: AI=”1”; PSC0 Addr

12h

4

Set Blink 1 at 152Hz, T_Blink1 = 1/152

Write PSC0 = 0

00h

5

Set PWM0 duty cycle to 30%

PWM0 / 256 = 0.3; Write PWM0=77

4Dh

6

Set Blink 2 at 2Hz, T_Blink1 = 1/2

Write PSC1 = 75

4Bh

7

Set PWM1 duty cycle to 50%

PWM1 / 256 = 0.5; Write PWM1=128

80h

8

Write LS0: LED0 to LED3 = ON

55h

9

Write LS1: LED4 to LED7 at Blink1

AAh

10

Write LS2: LED8 to LED11 at Blink2

FFh

11

Write LS3: LED12 to LED15 = OFF

00h

12

STOP

Figure 15.

qJA Transient Response Curve for TSSOP−24

Table 11. THERMAL RATINGS

Parameters

Ratings

Units

qJA TSSOP−24 (Note 8)

124

°C/W

8. Based on JEDEC EIA/JESD51−3 (2.0 oz Cu, 100 mm2)

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CAT9532YI-T2 Datasheet(PDF) 11 Page - ON Semiconductor

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