TPL9201 8-Channel Relay Driver with Integrated 5V LDO and Zero-Volt Detection | TI.com

TPL9201 (ACTIVE)

8-Channel Relay Driver with Integrated 5V LDO and Zero-Volt Detection

 

Description

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.

Features

  • Eight Low-Side Drivers With Internal Clamp for Inductive Loads and Current Limiting for Self Protection
    • Seven Outputs Rated at 150 mA and Controlled Through Serial Interface
    • One Output Rated at 150 mA and Controlled Through Serial Interface and Dedicated Enable Pin
  • 5-V ±5% Regulated Power Supply With 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 Is Asserted Low (40 µs Typ)
  • Zero-Voltage Detection Signal
  • Thermal Shutdown for Self Protection
  • APPLICATIONS
    • Electrical Appliances
      • Air Conditioning Units
      • Ranges
      • Dishwashers
      • Refrigerators
      • Microwaves
      • Washing Machines
    • General-Purpose Interface Circuits, Allowing Microcontroller Interface to Relays, Electric Motors, LEDs, and Buzzers

PowerPAD is a trademark of Texas Instruments.

Parametrics

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Part number Order Drivers per package Output voltage (Max) (V) Peak output current (mA) Delay time (Typ) (ns) Input compatibility Vol @ lowest spec current (Typ) (mV) Iout/ch (Max) (mA) Iout_off (Typ) (uA) Rating Package Group Package size: mm2:W x L (PKG)
TPL9201 Order now 8     16.5     150     10
80    
CMOS     400     150     2     Catalog     HTSSOP | 20     20HTSSOP: 42 mm2: 6.4 x 6.5 (HTSSOP | 20)    
TPL9202 Order now 8     16.5     150     10
80    
CMOS     400     150     2     Catalog     HTSSOP | 20     20HTSSOP: 42 mm2: 6.4 x 6.5 (HTSSOP | 20)