SLIS032B July   1995  – June 2015 TPIC6B595

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Switching Characteristics
    7. 6.7 Typical Characteristics
  7. 7 Parameter Measurement Information
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Serial-In Interface
      2. 8.3.2 Clear Register
      3. 8.3.3 Output Control
      4. 8.3.4 Cascaded Application
      5. 8.3.5 Current Limit Function
    4. 8.4 Device Functional Modes
      1. 8.4.1 Operation With V(VCC) < 4.5 (Minimum V(VCC))
      2. 8.4.2 Operating With 5.5 V < V(VCC) < 6 V
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
      3. 9.2.3 Application Curve
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Community Resources
    2. 12.2 Trademarks
    3. 12.3 Electrostatic Discharge Caution
    4. 12.4 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

8 Detailed Description

8.1 Overview

The TPIC6B595 device is a monolithic, high-voltage, medium-current power 8-bit shift register designed for use in systems that require relatively high load power. The device contains a built-in voltage clamp on the outputs for inductive transient protection, so it can also drive relays, solenoids, and other medium-current or high-voltage loads.

8.2 Functional Block Diagram

TPIC6B595 logic_diagram_slis032.gifFigure 12. Logic Diagram (Positive Logic)
TPIC6B595 schem_inputs_and_outputs.gifFigure 13. Schematic of Inputs

8.3 Feature Description

8.3.1 Serial-In Interface

This device contains an 8-bit serial-in, parallel-out shift register that feeds an 8-bit D-type storage register. Data transfers through both the shift and storage registers on the rising edge of the shift register clock (SRCK) and the register clock (RCK), respectively. The storage register transfers data to the output buffer when shift register clear (SRCLR) is high.

8.3.2 Clear Register

A logical low on (SRCLR) clears all registers in the device. TI suggests clearing the device during power up or initialization.

8.3.3 Output Control

Holding the output enable (G) high holds all data in the output buffers low, and all drain outputs are off. Holding (G) low makes data from the storage register transparent to the output buffers. When data in the output buffers is low, the DMOS transistor outputs are OFF. When data is high, the DMOS transistor outputs have sink-current capability. This pin can also be used for global PWM dimming.

8.3.4 Cascaded Application

The serial output (SER OUT) allows for cascading of the data from the shift register to additional devices. Connect the device (SEROUT) pin to the next device (SERIN) for daisy Chain. This provides improved performance for applications where clock signals may be skewed, devices are not located near one another, or the system must tolerate electromagnetic interference.

8.3.5 Current Limit Function

Outputs are low-side, open-drain DMOS transistors with output ratings of 50 V and 150-mA continuous sink current capability. Each output provides a 500-mA typical current limit at TC = 25°C. The current limit decreases as the junction temperature increases for additional device protection.

8.4 Device Functional Modes

8.4.1 Operation With V(VCC) < 4.5 (Minimum V(VCC))

This device works normally during 4.5 V ≤ V(VCC) ≤ 5.5 V, when operation voltage is lower than 4.5 V. TI can't ensure the behavior of device, including communication interface and current capability.

8.4.2 Operating With 5.5 V < V(VCC) < 6 V

This device works normally during this voltage range, but reliability issues may occur while the device works for a long time in this voltage range.