RT9467GQW

® RT9467 5A Single Cell Li-Ion Switching Battery Charger with Power Path Management and USB-OTG Boost Mode General Description Features The RT9467 is a switch-mode single cell Li-Ion/Li-Polymer battery charger for portable applications. It integrates a synchronous PWM controller, power MOSFETs, input current sensing and regulation, high-accuracy voltage regulation, and charge termination. The charge current is regulated through integrated sensing resistors. The RT9467 also features USB On-The-Go (OTG) support. RT9467 integrates D+/D- pin for USB host/charging port detection.  The RT9467 optimizes for charging task by using a control algorithm to vary the charge rate for different modes, including pre-charge mode, fast charge mode (constant voltage and constant current). The key charge parameters are programmable through an I2C interface. The RT9467 will resume the charge cycle whenever the battery voltage falls below an internal recharge threshold, and can automatically enter sleep mode if the input power supply is removed.  Other features include under-voltage protection, over voltage protection, thermal regulation and reverse leakage protection.  The RT9467 is available in a WQFN-24L 4x4 package.        Applications     Cellular Telephones Personal Information Appliances Tablet PC, Power Bank Portable Instruments    Ordering Information RT9467 Package Type QW : WQFN-24L 4x4 (W-Type) (Exposed Pad-Option 2)  Lead Plating System G : Green (Halogen Free and Pb Free) Note : Richtek products are :  RoHS compliant and compatible with the current requirements of IPC/JEDEC J-STD-020.  Suitable for use in SnPb or Pb-free soldering processes. Copyright © 2021 Richtek Technology Corporation. All rights reserved. DS9467-01 May 2021  High Efficiency 5A, 1.5MHz Switching Charger with Output Inductor DFE252012F, TOKO  Charging Efficiency 90.25% at ICHG = 2A  Charging Efficiency 88.86% at ICHG = 3A  Charging Efficiency 84.2% at ICHG = 5A Synchronous 1.5MHz/0.75MHz Fixed-Frequency PWM Controller with Up to 95% Duty Cycle Power Path Management by BATFET Control Support High Voltage Input (9V/12V) Support High Voltage Input Adapter (Pump Express 1.0/2.0) Support IR Compensation Function from Charger Output to Cell Terminal Optimize Input Sourcing Capability to Prevent Overload 2  AICR Current Limit Setting via I C  ILIM Pin for Current Limit Setting  Average Input Current Limit Measurement Shipping Mode for Battery Leakage Reduction Wake Up System, Exit Shipping Mode, and Reset System by QON Pin Automatic Charging Average Input Current Regulation (AICR) : 0.1A to 3.25A in 50mA Steps Charge Current Regulation Accuracy : ±7% Charge Voltage Regulation Accuracy : ±1% (0 to 85°°C) Protection for Overall System Considerations  Thermal Regulation for Current Reduction and Over-Temperature Protection  Input Over-Voltage Protection  Input Bad Adapter Protection  Battery Over-Voltage Protection Support ADC Conversion for  VBUS, VBAT, VSYS, REGN, TS_BAT, IBUS, IBAT, TEMP_JC INT Output for Communication with Host Through I2C (Watch Dog / Polling Function) is a registered trademark of Richtek Technology Corporation. www.richtek.com 1 RT9467 Pin Configuration Marking Information 57= : Product Code DSEL VMID REGN BTST LX LX 57=YM DNN (TOP VIEW) YMDNN : Date Code 24 23 22 21 20 19 VBUS D+ DSTAT SCL SDA 1 18 2 17 3 16 PGND 4 15 25 5 14 6 13 8 9 10 11 12 INT OTG CEB ILIM TS QON 7 PGND PGND SYS SYS BAT BAT WQFN-24L 4x4 Typical Application Circuit RT9467 Input 4V to 14V 1 VBUS BTST 21 47nF 2.2µF 23 LX VMID 1µH 19, 20 To System 10µF 4.7µF 4.7µF 22 SYS BAT 4 15, 16 REGN 4.7µF 698 Ω 13, 14 10µF STAT 10 ILIM 5 2 6 To I C BUS 9 8 2 3 24 10µF REGN SCL TS SDA 11 Battery Pack CEB OTG D+ INT DQON DSEL 7 12 PGND 17, 18 Below are recommended components information Pin Description Part Number Package Manufacturer VBUS 2.2μF/25V/X5R GRM155R61E225KE11 0402 muRata VMID 4.7μF/25V/X5R GRM188R61E475KE11 0603 muRata BTST 47nF/16V/X5R GRM033R61C473KE84 0201 muRata SYS 10μF/6.3V/X5R GRM185R60J106ME15 0603 muRata BAT 10μF/6.3V/X5R GRM185R60J106ME15 0603 muRata REGN 4.7μF/6.3V/X5R GRM155R60J475ME47 0402 muRata LX 1μH/20% DFE252012F-1R0 2.5 x 2mm TOKO ILIM 698Ω/1% RR0306S-6980-FNH 0201 CYNTEC Copyright © 2021 Richtek Technology Corporation. All rights reserved. www.richtek.com 2 is a registered trademark of Richtek Technology Corporation. DS9467-01 May 2021 RT9467 Functional Pin Description Pin No. Pin Name Pin Description 1 VBUS Power input. 2 D+ USB D+ port. 3 D- USB D- port. 4 STAT Charge status indication, open-drain output that indicates charge is in progress when held low and charge is finished when held High. If any fault occurs, CHG_STAT will blink at the frequency of 1Hz. Connect a 2.2k-10kΩ pull-up resistor. 5 SCL I2C interface serial clock input. Open-drain. An external pull-up resistor is required. 6 SDA I2C interface serial data input/output. Open-drain. An external pull-up resistor is required. 7 INT Interrupt output, active-low open-drain. Indicator of the charger/Boost event for system processor. 8 OTG OTG boost mode enable control, active-high. Act with OTG_PIN_EN (Addr0x01[1]). (Internal pull down 102kΩ) 9 CEB Charger enable input, active-low. (Internal pull down 102kΩ) 10 ILIM Input current limit setting pin. A resistor is connected from ILIM pin to ground to set the maximum input current limit. The actual input current limit is the lower value set through the ILIM pin and IAICR register bits. 11 TS Battery temperature-sense input, connected to a resistor divider for temperature programming. If there is no need for the battery temperature-sense function, a 50kΩ resistor is connected to REGN and another 50kΩ resistor to ground. 12 QON Internal BATFET enable control input. In shipping mode, QON is pulled Low for the duration of tSHIPMODE (typical 0.9s) to exit shipping mode. 13, 14 BAT Charge current output node for battery connection. The internal BATFET is connected between VSYS and BAT. Connect a 10μF ceramic capacitor between BAT and ground. 15, 16 SYS System connection node. The internal BATFET is connected between SYS and BAT. Connect a 20μF ceramic capacitor between SYS and ground. 17, 18 PGND Power ground. 19, 20 LX Switch node for output inductor connection. BTST Bootstrap capacitor connection for high-side gate driver. Connect a capacitor from BTST to LX to power the internal gate driver. REGN Regulated output voltage to supply for the PWM low-side gate driver and the bootstrap capacitor. Connect a 4.7μF ceramic capacitor from REGN to GND. 1. If VBUS is plugged in, REGN will be powered by VBUS and regulated to 4.9V. 2. If VBUS is unplugged, the charger will operate in sleep mode and the REGN voltage will be 0V. * For #2. : Since the REGN voltage is also used to power the TS resistor, when the charger is in sleep mode, the REGN will be woken up (be reactivated) if VBAT is greater than forward voltage (VF) of the internal high-side(HS) MOS diode by VSLEEP_EXIT with all function of the internal ADC being activated and I2C R/W. The REGN wake-up time is 500ms. 21 22 Copyright © 2021 Richtek Technology Corporation. All rights reserved. DS9467-01 May 2021 is a registered trademark of Richtek Technology Corporation. www.richtek.com 3 RT9467 Pin No. Pin Name Pin Description VMID Connection point between the reverse blocking MOSFET and the high-side switching MOSFET. DSEL 1. Open drain type configuration 2. During input source type detection, the pin drives low. 3. When detection is completed, the pin keeps low. (DCP / HVDCP) 4. When detection is completed, the pin keeps high. (The other type source detection, SDP /CDP) 25 (Exposed Pad) PGND Power ground. The exposed pad must be connected to GND and well soldered to a large PCB copper area for maximum power dissipation. 23 24 Functional Block Diagram REGN VBUS VMID BTST LDO D+ D- USB Host/ Adapter/Quick Charge Detection UUG Controller Charger/OTG Controller H/L Driver LX Analog Base PGND SYS VBUS VSYS Protection VBAT SCL Power path Controller BAT IBUS 2 I C SDA ADC IBAT REGN INT State Machine TS STAT Silicon Temp Detection DSEL OTG Copyright © 2021 Richtek Technology Corporation. All rights reserved. www.richtek.com 4 CEB ILIM QON is a registered trademark of Richtek Technology Corporation. DS9467-01 May 2021 RT9467 Operation The RT9467 is an integrated single cell Li-ion battery switching charger with power path controller. Base Circuits Base circuits provide the internal power, VREGN and reference voltage and bias current. Protection Circuits The protection circuits include the VINOVP, VINUVLO, BATOVP and OTP circuits. The protection circuits turn off the charging when the input power or die temperature is in abnormal level. TS Detection The RT9467 detects the temperature of the battery pack via REGN and TS pins. The REGN pin provides a constant voltage source to drive the voltage divider composed of a pulled-high resister and a NTC resister. The RT9467 reports the sensing results via IRQ and status bits for COLD, COOL, WARM and HOT. I2C Controller The key parameters of charging and OTG are programmable through I2C commands. Buck Regulator for Charging and Boost Regulator as OTG The multi-loop controller controls the operation of charging process and current supply to the system. It also controls the circuits as a Boost converter for OTG applications. Battery Detection The RT9467 is capable of doing the battery absence detection. The detection protects the charger when battery is removed accidentally. Adapter Detection If the poor input power source is connected to the RT9467, the operation will be shut down by the adapter detection. Power Path Management and Control Once the battery voltage increases to a defined system minimum regulation voltage, the internal path between SYS and BAT will be fully turned on. That is, a better charging efficiency can be achieved. When end of charge occurs, the charging will stop and the internal path will be turned off. USB Charger Detection The RT9467 can detect and distinguish Standard Downstream Port, Charging Downstream Port and Dedicated Charging Port via DP and DM pins. Copyright © 2021 Richtek Technology Corporation. All rights reserved. DS9467-01 May 2021 is a registered trademark of Richtek Technology Corporation. www.richtek.com 5 RT9467 Absolute Maximum Ratings              (Note 1) Supply Input Voltage, VBUS --------------------------------------------------------------------------------------------Supply Input Voltage, VBUS (Peak