ZHCSGZ0B October   2017  – November 2017 TPS23525

PRODUCTION DATA.  

  1. 1 特性
  2. 2 应用
  3. 3 说明
    1.     Device Images
      1.      简化电路原理图
  4. 4 修订历史记录
  5. 5 Pin Configuration and Functions
    1.     Pin 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
    1. 7.1 Relationship between Sense Voltage, Gate Current, and Timer
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Current Limit
        1. 8.3.1.1 Programming the CL Switch-Over Threshold
        2. 8.3.1.2 Programming CL1
        3. 8.3.1.3 Programming CL2
        4. 8.3.1.4 Computing the Fast Trip Threshold
      2. 8.3.2 Soft Start Disconnect
      3. 8.3.3 Timer
      4. 8.3.4 OR-ing
    4. 8.4 Device Functional Modes
      1. 8.4.1 OFF State
      2. 8.4.2 Insertion Delay State
      3. 8.4.3 Start-up State
      4. 8.4.4 Normal Operation State
  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
        1. 9.2.2.1  Selecting RSNS
        2. 9.2.2.2  Selecting Soft Start Setting: CSS and CSS,VEE
        3. 9.2.2.3  Selecting VDS Switch Over Threshold
        4. 9.2.2.4  Timer Selection
        5. 9.2.2.5  MOSFET Selection and SOA Checks
        6. 9.2.2.6  Input Cap, Input TVS, and OR-ing FET selection
        7. 9.2.2.7  EMI Filter Consideration
        8. 9.2.2.8  Under Voltage and Over Voltage Settings
        9. 9.2.2.9  Choosing RVCC and CVCC
        10. 9.2.2.10 Power Good Interface to Downstream DC/DC
      3. 9.2.3 Application Curves
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12器件和文档支持
    1. 12.1 器件支持
      1. 12.1.1 第三方产品免责声明
    2. 12.2 文档支持
      1. 12.2.1 相关文档
    3. 12.3 接收文档更新通知
    4. 12.4 社区资源
    5. 12.5 商标
    6. 12.6 静电放电警告
    7. 12.7 Glossary
  13. 13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

PW Package
16-Pin (TSSOP)
Top View

Pin Functions

PIN TYPE DESCRIPTION
NAME NO.
Neg48A 1 I Input to the OR-ing controller for the –48A feed. The TPS23525 will regulate the drop from VEE to Neg48A to 25 mV to mimic an ideal diode.
NC 2 No connect to space high voltage pins.
GATEB 3 O Gate driver for the OR-ing FET of the -48V_B feed.
GATEA 4 O Gate driver for the OR-ing FET of the -48V_A feed.
VEE 5 GND This pin corresponds to the IC GND. Kelvin sense to the bottom of RSNS to ensure accurate current limit.
SNS 6 I Sense pin, used to measure current and regulate it. Kelvin Sense to RSNS to ensure accurate current limits.
GATE 7 O Gate drive for the main hot swap FET.
SS 8 O Pin used for soft starting the output. Connect a capacitor (CSS) between the SS pin and -48V_OUT. The dv/dt rate on the -48V_OUT pin is proportional to the gate sourcing current divided by CSS.
D 9 I Pin used to sense the drain of the hot swap FET and to program the threshold where the hot swap switches from the CL1 and CL2. Connect a resistor from this pin to the drain of the hot swap FET (also called -48V_OUT) to program the threshold.
TMR 10 O Timer pin used to program the duration when the hot swap FET can be in current limit. Program this time by adding a capacitor between the TMR pin and VEE.
OV 11 I Input over voltage comparator. Tie a resistor divider to program the threshold where the device turns off due to over voltage event.
UVEN 12 I Input under voltage comparator. Tie a resistor divider to program the threshold where the device turns on.
VCC 13 S Clamped supply. Tie to RTN through resistor.
PGb 14 O Power Good Bar, which is an open drain output that indicated when the power is good and the load can start drawing full power. PGb goes low when the hot swap is fully on and the DC/DC can draw full power.
NC 15 No connect to space high voltage pins.
Neg48B 16 I Input to the OR-ing controller for the –48B feed. The TPS23525 will regulate the drop from VEE to Neg48B to 25 mV to mimic an ideal diode.