
1
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
8-CHANNEL RELAY DRIVER
WITH INTEGRATED 5-V LDO AND ZERO-VOLT DETECTION
SLIS123D – JUNE 2006 – REVISED FEBRUARY 2008
www.ti.com
Electrical Appliances
2
Eight Low-Side Drivers With Internal Clamp for
Inductive Loads and Current Limiting for Self
–
Air Conditioning Units
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
200-mA Load Capability at VIN Max of 18 V
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
Asserted Low (40
s Typ)
Zero-Voltage Detection Signal
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
to absorb the energy in the inductor at turn OFF. Alternatively, the system can use a fly-back diode to VIN to help
recirculate the energy in an inductive load at turn OFF.
ORDERING INFORMATION(1)
TA
PACKAGE(2)
ORDERABLE PART NUMBER
TOP-SIDE MARKING
PDIP – N
Tube of 20
TPL9201N
–40
°C to 125°C
Reel of 2000
TPL9201PWPR
PowerPAD – PWP
PL201
Tube of 70
TPL9201PWP
(1)
For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI
(2)
1
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.
2
PowerPAD is a trademark of Texas Instruments.
PRODUCTION DATA information is current as of publication date.
Copyright 2006–2008, 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.