SQ40001RGQ-Products-Silergy Corp

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SQ40001RGQ

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High Current Overvoltage Protection Switch with High Current Bi-directional DC/DC Regulator And Capacitance Measurement
Datasheet
SQ40001RGQ High Current Overvoltage Protection Switch with High Current Bi-directional DC/DC Regulator And Capacitance Measurement Datasheet
    Part numberSQ40001RGQ
    Vin (min) (V)2.6
    Vin (max) (V)16
    Channel(#)1
    ApplicationSSD
    FeaturesInput-side reverse blocking switch Bi-directional DC/DC regulator, I2C interface
    PackageQFN4×4-25
    • Low RDS(ON) for Internal Switches 
      - Input Reverse Blocking Switch: 24mΩ (Typical)
      - High-side and Low-side Switches of Bi-directional DC/DC Regulator: 70mΩ/70mΩ (Typical)
      - Disconnect Switch: 40mΩ (Typical)
    • 2.6V-16V Input Voltage Range
    • Storage Voltage Rating Up to 36V
    • Programmable Input Current Limit from 1.2A to 6.2A
    • Selectable Over Voltage Protection: 3.8V  6.1V and 14.3V
    • Reverse Blocking at Input Side to Prevent From Leakage Current 
    • Programmable Reverse Blocking Switch Turn On Delay Time
    • Programmable Reverse Blocking Switch Soft-start Time
    • Integrated High-efficiency Bi-directional Dc-Dc Regulator: Boost Charging Mode and Buck Discharging Mode Auto-alternating According to the Programmed BUS Voltage Detection and Regulation Level
    • Programmable Quasi-Fixed Frequency Constant OFF Time Control for Steady-State Operation
    • Programmable Boost Charging Peak Current
    • Programmable Storage Voltage
    • MTP(Multi-Times Programming) Available for Control Parameters Programming by I2C
    • Short-circuit Protection at Energy Storage Side
    • Storage Capacitance Measurement and Abnormal ESR Detection
    • Enable Control
    • RoHS Compliant and Halogen Free
    • Compact Package: QFN4×4-25

    The SQ40001 is a power management IC for the applications of power backup in solid-state driver or other backup power supplies which can achieve backup power storage and release functions. The energy is transferred bi-directionally between the BUS side and the energy storage side with high efficiency by bi-directional DC/DC regulator. Fast transient response and excellent stability are achieved by the quasi-fixed frequency constant off time control strategy. 

    A reverse blocking switch will be integrated at the input side to prevent from energy leaking when the input power source is removed or inserted with inverse polarity. The reverse blocking switch also has the programmable current limit function with the program range from 1.2A to 6.2A. Three different BUS over voltage protection (OVP) thresholds are selectable by the OVP pin for the applications with different kinds of input power source.

    I2C interface is integrated in the SQ40001 to reduce the amount of the external components. Control parameters such as input current limit, switching frequency, and Boost peak current limit can be programmed by the I2C.

    Storage capacitance measurement and abnormal storage capacitor ESR detection circuit are integrated of the SQ40001. The measurement results are stored in internal read only data registers for MCU reading by the I2C interface.

    The SQ40001 along with QFN4×4-25 package provides compact PCB layout to save circuit area for the increase of the SSD memory capacity.

     

    Evaluation Board

    • SQ40001_1

      Photo of evaluation board

    • SQ40001_2

      Photo of evaluation board

    • SQ40001_3

      Photo of evaluation board

    EVB_SQ40001RGQ

    The EVB_SQ40001RGQ is intended for evaluating high current overvoltage protection switch with high current Bi-directional DC/DC regulator and capacitance measurement.

    Technical Documentation