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FEATURES

APPLICATIONS

ZVS

OUT1

OUT2

OUT3

OUT4

OUT5

OUT6

OUT7

OUT8

GND

SYN

V

IN

5V

OUT

SCLK

NCS

MOSI

RST

R

DELAY

EN1

GND

1

2

3

4

5

6

7

8

9

10

20

19

18

17

16

15

14

13

12

11

NORPWPPACKAGE

(TOPVIEW)

DESCRIPTION/ORDERING INFORMATION

TPL9201

8-CHANNEL RELAY DRIVER

WITH INTEGRATED 5-V LDO AND ZERO-VOLT DETECTION

SLIS123B – JUNE 2006 – REVISED NOVEMBER 2006

• Electrical Appliances

• Eight Low-Side Drivers With Internal Clamp

for Inductive Loads and Current Limiting for

–

Air Conditioning Units

Self Protection

–

Ranges

–

Seven Outputs Rated at 150 mA and

–

Dishwashers

Controlled Through Serial Interface

–

Refrigerators

–

One Output Rated at 150 mA and

–

Microwaves

Controlled Through Serial Interface and

–

Washing Machines

Dedicated Enable Pin

• General-Purpose Interface Circuits, Allowing

• 5-V ±5% Regulated Power Supply With

Microcontroller Interface to Relays, Electric

Motors, LEDs, and Buzzers

• Internal Voltage Supervisory for Regulated

Output

• Serial Communications for Control of Eight

Low-Side Drivers

• Enable/Disable Input for OUT1

• 5-V or 3.3-V I/O Tolerant for Interface to

Microcontroller

• Programmable Power-On Reset Delay Before

RST Asserted High, Once 5 V Is Within

Specified Range (6 ms Typ)

• Programmable Deglitch Timer Before RST Is

Asserted Low (40

µs Typ)

• Zero-Voltage Detection Signal With Built-In

Filter of 20

µs

• Thermal Shutdown for Self Protection

The power supply provides regulated 5-V output to power the system microcontroller and drive eight low-side

switches. The AC zero-detect circuitry is monitoring the crossover voltage of the mains AC supply. The resultant

signal is a low-frequency clock output on the ZVS terminal, based on the AC-line cycle. This information allows

the microcontroller to reduce in-rush current by powering loads on the AC-line peak voltage.

A serial communications interface controls the eight low-side outputs; each output has an internal snubber circuit

recirculate the energy in an inductive load at turn OFF.

ORDERING INFORMATION

PACKAGE

ORDERABLE PART NUMBER

TOP-SIDE MARKING

PDIP – N

Tube of 20

TPL9201N

TPL9201

–40

°C to 125°C

Reel of 2000

TPL9201PWPR

PowerPAD™ – PWP

IC9201

Tube of 70

TPL9201PWP

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas

Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

PowerPAD is a trademark of Texas Instruments.

PRODUCTION DATA information is current as of publication date.

Copyright © 2006, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.