ZHCS259B July   2011  – August 2015 TPS65142

PRODUCTION DATA.  

  1. 1 特性
  2. 2 应用
  3. 3 说明
  4. 4 修订历史记录
  5. 5 Pin Configuration and Functions
  6. 6 Specifications
    1. 6.1 ESD Ratings
    2. 6.2 Recommended Operating Conditions
    3. 6.3 Thermal Information
    4. 6.4 Electrical Characteristics
    5. 6.5 Timing Requirements
    6. 6.6 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1  AVDD Boost Regulator
        1. 7.3.1.1 Setting the Output Voltage
        2. 7.3.1.2 Soft-Start (AVDD Boost Converter)
        3. 7.3.1.3 Frequency Select Pin (FREQ)
        4. 7.3.1.4 Overvoltage Protection
      2. 7.3.2  Regulated Positive Charge Pump
      3. 7.3.3  Negative Charge Pump
      4. 7.3.4  Gate Voltage Shaping
      5. 7.3.5  VCOM Buffer
      6. 7.3.6  Reset
      7. 7.3.7  Under-voltage Lockout (UVLO)
      8. 7.3.8  Thermal Shutdown
      9. 7.3.9  WLED Boost Regulator
      10. 7.3.10 Current Sinks
      11. 7.3.11 Unused IFB Pins
      12. 7.3.12 PWM Dimming
      13. 7.3.13 Enabling the WLED Driver
      14. 7.3.14 Soft-Start of WLED Boost Regulator
      15. 7.3.15 Protection of WLED Driver
        1. 7.3.15.1 Current Limit Protection
        2. 7.3.15.2 Open WLED String Protection
        3. 7.3.15.3 Overvoltage Protection
      16. 7.3.16 Power Up/Down Sequence
        1. 7.3.16.1 Power Up Sequence
        2. 7.3.16.2 Power Down Sequence and LCD Discharge Function
  8. 8 Application and Implementation
    1. 8.1 Typical Application
  9. 9 器件和文档支持
    1. 9.1 社区资源
    2. 9.2 商标
    3. 9.3 静电放电警告
    4. 9.4 Glossary
  10. 10机械、封装和可订购信息

封装选项

机械数据 (封装 | 引脚)
散热焊盘机械数据 (封装 | 引脚)
订购信息

5 Pin Configuration and Functions

WQFN Package
32-Pin (RTG)
Top View
TPS65142 PinOut_01_SLVSAX5.gif

Pin Functions

PIN I/O DESCRIPTION
NAME NO.
AGND 3 Analog ground
BL_SW 13 The backlight boost converter switching node
DCTRL 17 I Backlight PWM dimming control input
DRVN 4 O Voltage driver of the negative charge pump
DRVP 27 Voltage driver of positive charge pump
EN 11 I Backlight enable input
FB 31 I AVDD Boost converter feedback pin
FBN 5 I Negative charge pump feedback pin
FBP 26 I Positive charge pump feedback pin
FREQ 32 I AVDD boost converter switching frequency selection: 1.2MHz when V(FREQ) = VIN and 650 kHz when V(FREQ) = ground
IFB1 18 I Channel 1 of the WLED backlight current sink
IFB2 19 I Channel 2 of the WLED backlight current sink
IFB3 20 I Channel 3 of the WLED backlight current sink
IFB4 9 I Channel 4 of the WLED backlight current sink
IFB5 10 I Channel 5 of the WLED backlight current sink
IFB6 12 I Channel 6 of the WLED backlight current sink
ISET 16 I WLED current sink level programming input
OPI 30 I Input voltage of VCOM Buffer
OPO 29 O Output voltage of VCOM Buffer
PGND ePAD Exposed pad that serves as the power ground for both boost converters
RE 23 Sets the slope for the gate shaping function. Pin for external Resistor
REF 8 O Reference voltage for the negative charge pump
SUP 28 I Supply pin of the gate shaping and operational amplifier blocks. Connected as well to the overvoltage protection comparator. This pin needs to be connected to the output of the AVDD boost converter.
SW 1 Switch pin of the AVDD boost converter
VBAT 14 I Input of the backlight boost converter
VDET 6 I Reset IC threshold pin (Voltage divider)
VDPM 21 O Sets the delay to enable VGHM Output. Pin for external capacitor. Floating if no delay needed
VFLK 22 I Charge/discharge signal for VGHM
VGH 25 I Input for positive Charge Pump
VGHM 24 O Output for gate-high modulation
VIN 2 I Input supply pin
VO 15 O The output of the backlight boost converter
XAO 7 O Reset IC output pulling down XAO pin when active.