SLUSC27C April   2015  – March 2017

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 Timing Requirements
    7. 6.7 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 Device Power Up
        1. 7.3.1.1 Battery Only
        2. 7.3.1.2 Adapter Detect and ACOK Output
          1. 7.3.1.2.1 Adapter Overvoltage (ACOVP)
      2. 7.3.2 System Power Selection
      3. 7.3.3 Enable and Disable Charging
        1. 7.3.3.1 Automatic Internal Soft-Start Charger Current
      4. 7.3.4 Current and Power Monitor
        1. 7.3.4.1 High Accuracy Current Sense Amplifier (IADP and IDCHG)
        2. 7.3.4.2 High Accuracy Power Sense Amplifier (PMON)
      5. 7.3.5 Processor Hot Indication for CPU Throttling
      6. 7.3.6 Converter Operation
        1. 7.3.6.1 Continuous Conduction Mode (CCM)
        2. 7.3.6.2 Discontinuous Conduction Mode (DCM)
        3. 7.3.6.3 Non-Sync Mode and Light Load Comparator
        4. 7.3.6.4 EMI Switching Frequency Adjust
      7. 7.3.7 Battery LEARN Cycle
      8. 7.3.8 Charger Timeout
      9. 7.3.9 Device Protections Features
        1. 7.3.9.1 Input Overcurrent Protection (ACOC)
        2. 7.3.9.2 Charge Overcurrent Protection (CHGOCP)
        3. 7.3.9.3 Battery Overvoltage Protection (BATOVP)
        4. 7.3.9.4 Battery Short
        5. 7.3.9.5 Thermal Shutdown Protection (TSHUT)
        6. 7.3.9.6 Inductor Short, MOSFET Short Protection
    4. 7.4 Device Functional Modes
      1. 7.4.1 Battery Charging
      2. 7.4.2 Hybrid Power Boost Mode
        1. 7.4.2.1 Battery Discharge Current Regulation in Hybrid Power Boost Mode
    5. 7.5 Programming
      1. 7.5.1 SMBus Interface
        1. 7.5.1.1 SMBus Write-Word and Read-Word Protocols
        2. 7.5.1.2 Timing Diagrams
    6. 7.6 Register Maps
      1. 7.6.1  Battery-Charger Commands
      2. 7.6.2  Setting Charger Options
        1. 7.6.2.1 ChargeOption0 Register
      3. 7.6.3  ChargeOption1 Register
      4. 7.6.4  ChargeOption2 Register
      5. 7.6.5  ChargeOption3 Register
      6. 7.6.6  ProchotOption0 Register
      7. 7.6.7  ProchotOption1 Register
      8. 7.6.8  ProchotStatus Register
      9. 7.6.9  Setting the Charge Current
      10. 7.6.10 Setting the Charge Voltage
      11. 7.6.11 Setting Input Current
      12. 7.6.12 Setting the Discharge Current
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Applications
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 Negative Output Voltage Protection
        2. 8.2.2.2 Reverse Input Voltage Protection
        3. 8.2.2.3 Reduce Battery Quiescent Current
        4. 8.2.2.4 Inductor Selection
        5. 8.2.2.5 Input Capacitor
        6. 8.2.2.6 Output Capacitor
        7. 8.2.2.7 Power MOSFETs Selection
        8. 8.2.2.8 Input Filter Design
      3. 8.2.3 Application Curves
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Examples
      1. 10.2.1 Layout Consideration of Current Path
      2. 10.2.2 Layout Consideration of Short Circuit Protection
      3. 10.2.3 Layout Consideration for Short Circuit Protection
  11. 11Device and Documentation Support
    1. 11.1 Receiving Notification of Documentation Updates
    2. 11.2 Community Resources
    3. 11.3 Trademarks
    4. 11.4 Electrostatic Discharge Caution
    5. 11.5 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

パッケージ・オプション

メカニカル・データ（パッケージ｜ピン）
サーマルパッド・メカニカル・データ
発注情報

5 Pin Configuration and Functions

RUY Package
28-Pin WQFN
Top View

Pin Functions

PIN DESCRIPTION
NAME NUMBER
ACN 1 Input current sense resistor negative input. Place an optional 0.01-µF ceramic capacitor from ACN to GND for common-mode filtering. Place a 0.1-µF ceramic capacitor from ACN to ACP to provide differential mode filtering.
ACP 2 Input current sense resistor positive input. Place a 0.1-µF ceramic capacitor from ACP to GND for common-mode filtering. Place a 0.1-µF ceramic capacitor from ACN to ACP to provide differential-mode filtering.
CMSRC 3 ACDRV charge pump source input. Place a 4-kΩ resistor from CMSRC to the common source of ACFET (Q1) and RBFET (Q2) to limit the inrush current on CMSRC pin.
ACDRV 4 Charge pump output to drive both adapter input N-channel MOSFET (ACFET) and reverse blocking N-channel MOSFET (RBFET). ACDRV voltage is 6 V above CMSRC when ACOK is HIGH. Place a 4-kΩ resistor from ACDRV to the gate of ACFET and RBFET limits the inrush current on ACDRV pin.
ACOK 5 Active HIGH AC adapter detection open drain output. It is pulled HIGH to external pullup supply rail by external pullup resistor when a valid adapter is present (ACDET above 2.4 V, VCC above UVLO but below ACOV and VCC above BAT). If any of the above conditions is not valid, ACOK is pulled LOW by internal MOSFET. Connect a 10-kΩ pullup resistor from ACOK to the pullup supply rail.
ACDET 6 Adapter detection input. Program adapter valid input threshold by connecting a resistor divider from adapter input to ACDET pin to GND pin. When ACDET pin is above 0.6 V and VCC is above UVLO, REGN LDO is present, ACOK comparator, input current buffer (IADP), discharge current buffer (IDCHG), independent comparator, and power monitor buffer (PMON) can be enabled with SMBus. When ACDET is above 2.4V, and VCC is above SRN but below ACOV, ACOK goes HIGH.
IADP 7 Buffered adapter current output. V(IADP) = 20 or 40 × (V(ACP) – V(ACN))
The ratio of 20x and 40x is selectable with SMBus. Place 100-pF (or less) ceramic decoupling capacitor from IADP pin to GND. This pin can be floating if this output is not in use.
IDCHG 8 Buffered discharge current. V(IDCHG) = 8 or 16 × (V(SRN) – V(SRP))
The ratio of 8x or 16x is selectable with SMBus. Place 100-pF (or less) ceramic decoupling capacitor from IDSCHG pin to GND. This pin can be floating if this output is not in use.
PMON 9 Buffered total system power. The output current is proportional to the total power from the adapter and battery. The ratio is selectable through SMBus. Place a resistor from PMON pin to GND to generate PMON voltage. Place a 100-pF (or less) ceramic decoupling capacitor from PMON pin to GND. This pin can be floating if this output is not in use.
PROCHOT 10 Active low, open-drain output of the processor hot indicator. The charger IC monitors events like adapter current, battery discharge current. After any event in the PROCHOT profile is triggered, a minimum 10-ms pulse is asserted.
SDA 11 SMBus open-drain data I/O. Connect to SMBus data line from the host controller or smart battery. SMBus communication starts when VCC is above UVLO. Connect a 10-kΩ pullup resistor according to SMBus specifications.
SCL 12 SMBus open-drain clock input. Connect to SMBus clock line from the host controller or smart battery. SMBus communication starts when VCC is above UVLO. Connect a 10-kΩ pullup resistor according to SMBus specifications.
CMPIN 13 Input of independent comparator. Internal reference, output polarity and deglitch time is selectable by SMBus. Place a resistor between CMPIN and CMPOUT to program hysteresis when the polarity is HIGH. If comparator is not in use, CMPIN is tied to ground, and CMPOUT is left floating.
CMPOUT 14 Open-drain output of independent comparator. Place 10-kΩ pullup resistor from CMPOUT to pullup supply rail. Comparator reference, output polarity and deglitch time is selectable by SMBus. If comparator is not in use, CMPIN is tied to ground, and CMPOUT is left floating.
BATPRES 15 Active low battery present input signal. Low indicates battery present, high indicates battery absent. The device exits the LEARN function and turns on ACFET/RBFET within 100 µs if BATPRES pin is pulled high. Upon BATPRES from LOW to HIGH, battery charging and hybrid power boost mode are disabled. The host can enable charging and hybrid power boost mode by write to REG0x14() and REG0x15() when BATPRES is HIGH
TB_STAT 16 Active low, open-drain output for hybrid power boost mode indication. It is pulled low when the IC is operating in boost mode. Otherwise, it is pulled high. Connect a 10-kΩ pullup resistor from TB_STAT pin to the pullup supply rail.
BATSRC 17 Connect to the source of N-channel BATFET. BATDRV voltage is 6 V above BATSRC to turn on BATFET.
BATDRV 18 Charge pump output to drive N-channel MOSFET between battery and system (BATFET). BATDRV voltage is
6 V above BATSRC to turn on BATFET and power system from battery. BATDRV is shorted to BATSRC to turn off BATFET. Place a 4-kΩ resistor from BATDRV to the gate of BATFET limits the inrush current on BATDRV pin.
SRN 19 Charge current sense resistor negative input. SRN pin is for battery voltage sensing as well. Connect SRN pin with a 0.1-µF ceramic capacitor to GND for common-mode filtering. Connect a 0.1-µF ceramic capacitor from SRP to SRN to provide differential mode filtering.
SRP 20 Charge current sense resistor positive input. Connect a 0.1-µF ceramic capacitor from SRP to SRN to provide differential mode filtering.
ILIM 21 Charge current and discharge current limit.VILIM = 20 × (VSRP – VSRN) for charge current and VILIM = 5 × (VSRN – VSRP) for discharge current. Program ILIM voltage by connecting a resistor divider from system reference 3.3-V rail to ILIM pin to GND pin. The lower of ILIM voltage and 0x14() (for charge) or 0x39 (for discharge) reference sets actual regulation limit. The minimum voltage on ILIM to enable charge or discharge current regulation is 120 mV.
GND 22 IC ground. On PCB layout, connect to analog ground plane, and only connect to power ground plan through pad underneath IC.
LODRV 23 Low-side power MOSFET driver output. Connect to low-side N-channel MOSFET gate.
REGN 24 6-V linear regulator output supplied from VCC. The LDO is active when ACDET above 0.6 V, VCC above UVLO. Connect a ≥ 2.2-µF 0603 ceramic capacitor from REGN to GND. The diode between REGN and BTST is integrated.
BTST 25 High-side power MOSFET driver power supply. Connect a 47-nF capacitor from BTST to PHASE. The diode between REGN and BTST is integrated inside the IC.
HIDRV 26 High-side power MOSFET driver output. Connect to the high side N-channel MOSFET gate.
PHASE 27 High-side power MOSFET driver source. Connect to the source of the high-side N-channel MOSFET.
VCC 28 Input supply from adapter or battery. Use 10-Ω resistor and 1-µF capacitor to ground as a low pass filter to limit inrush current. A diode OR is connected to VCC. It powers charger IC from input adapter and battery.
PowerPAD™ Exposed pad beneath the IC. Analog ground and power ground star-connected only at the PowerPAD plane. Always solder the PowerPAD to the board and have vias on the PowerPAD plane connecting to analog ground and power ground planes. It also serves as a thermal pad to dissipate the heat.