RT9465GQW

® RT9465 3A Single Cell Li-on Battery Slave Switching Charger General Description Features The RT9465 is a switch-mode single cell li-Ion/Li-Polymer battery charger for portable applications. It integrates a  Input Voltage Range : 3.9V to 14V  Synchronous 1.5MHz/0.75MHz Switching Frequency 95% Max. Duty Up to 92%/94% Peak Efficiency at VIN = 9V/5V VIN Over-Voltage Protection : 14.5V VIN Under-Voltage Protection : 3.8V VIN Under-Voltage-Lock-Out : 3.3V Fault Detection (VIN and VBAT Monitoring) Programmable Minimum Input Voltage Range : 3.9V to 13.4V (0.1V/Step) Programmable Battery Voltage Regulation Range : 3.8V to 5.06V (0.02V/Step) Programmable End of Charge Range : 0.6A to 1.6A (0.1A/Step) Programmable Average Output Current Regulation Range : 0.6A to 3A (0.1A/Step) Junction Temperature Monitor : 60°°C to 116°°C (4°°C/ Step) VIN Minimum Input Voltage Regulation (MIVR) : ±3% Battery CV (Constant Voltage) Regulation : ±1% Output CC (Constant Current) Regulation, Output Current < 1A : ±100mA (VIN = 9V/12V) Output CC (Constant Current) Regulation, Output Current > 1A : ±10% (VIN = 9V/12V) Junction Temperature Monitor Accuracy : ±3°°C Thermal Shutdown : 160°°C synchronous PWM controller and high accuracy voltage regulation. Besides, the charging current is regulated through the integrated sensing MOSFET. The RT9465 optimizes the charging task by using a control algorithm to vary the charge rate via different modes, including fast charge mode and constant voltage mode. The key charge parameters are programmable via the I2C interface. The junction temperature is monitored by ADC.        Other features include under-voltage protection, overvoltage protection (including VBAT and VIN side), thermal regulation and MIVR. The RT9465 is available in a WQFN-16L 3x3 package.    Ordering Information  RT9465  Package Type QW : WQFN-16L 3x3 (W-Type)  Lead Plating System G : Green (Halogen Free and Pb Free)  Note : Richtek products are :  RoHS compliant and compatible with the current require-  Suitable for use in SnPb or Pb-free soldering processes.   ments of IPC/JEDEC J-STD-020. Applications  Marking Information K7= : Product Code K7=YM DNN YMDNN : Date Code Copyright © 2018 Richtek Technology Corporation. All rights reserved. DS9465-01 November 2018    Cellular Telephones Personal Information Appliances Tablet PC, Power Bank Portable Instruments is a registered trademark of Richtek Technology Corporation. www.richtek.com 1 RT9465 Pin Configuration BOOT SW SW SW (TOP VIEW) 16 15 14 13 VIN 1 12 PGND VIN 2 11 PGND REG 3 10 AGND SDA 4 9 BAT+ AGND 5 6 7 8 SCL EN INT BAT- 17 WQFN-16L 3x3 Functional Pin Description Pin No. Pin Name Pin Function 1, 2 VIN Power input. Bypass VIN to GND with a 2.2F/25V ceramic capacitor. 3 REG PWM low-side driver and bootstrap power supply. Bypass REGN to GND with a 4.7F/6.3V ceramic capacitor. 4 SDA I2C interface serial clock input. Open-drain. An external pull-up resistor 10k is required. 5 SCL I2C interface serial data input/output. Open-drain. An external pull-up resistor 10k is required. 6 EN Device enable control pin. Pull low to disable device. 7 INT Open-drain. Interrupt signal to Host. 8 BAT- Negative battery voltage sense. 9 BAT+ Positive battery voltage sense. 10, 17 (Exposed Pad) AGND Analog ground. The exposed pad must be soldered to a large PCB and connected to AGND for maximum thermal dissipation. 11, 12 PGND Power ground. SW Switch node. Connect to an external inductor. BOOT Bootstrap supply for high-side MOSFET. Connect 47nF/16V ceramic capacitor across BOOT and SW. 13, 14, 15 16 Copyright © 2018 Richtek Technology Corporation. All rights reserved. www.richtek.com 2 is a registered trademark of Richtek Technology Corporation. DS9465-01 November 2018 RT9465 Typical Application Circuit RT9465 (Slave Charger) RT9466 (Main Charger) VBUS 3.9V to 14V 1 REGN VBUS 1, 2 VREG_M 22 10 VSYS OTG 12 QON 9 ENB 5 SCL 6 SDA CIN_1 4.7µF 8 REG 3 VREG_S CREG_S 4.7µF STAT 19, 20 SW 15, 16 SYS 13, 14 BAT QON CEB SCL TS SDA CIN_2 4.7µF BOOT CBT_M 47nF L1 1µH GPIO VSYS CSYS 10µF CBAT 10µF 11 6 5 4 CSYS 10µF IRQ_S 7 EN SW SCL 16 CBT_S 47nF L2 1µH 13, 14, 15 VOUT COUT 10µF SDA BAT+ INT + 7 INT 3 PG IRQ_M PGOOD VIN VMID VMID 23 ILIM R1 698  4 CIN_S 2.2µF CREG_M 4.7µF CIN 2.2µF BAT- 9 8 VREG_M AGND PGND 11, 12 10 17 (Exposed Pad) PGND 17, 18, 25 (Exposed Pad) Note : The total CIN of slave charger between PMID pin of main charger is 10µF at least. Table 1. Component List of Evaluation Board Reference Qty Part Number Description Package Manufacturer CIN_S 1 GRM155R61E225KE11 2.2F/25V/X5R 0402 muRata CREG_S 1 GRM155R60J475ME47 4.7F/6.3V/X5R 0402 muRata CBT_S 1 GRM033R61C473KE84 47nF/16V/X5R 0201 muRata COUT 1 GRM188R61A106KE69 10F/10V/X5R 0603 muRata L2 1 DFE252012F-1R0M 1H 2.5x2.0x1.2 muRata U1 1 RT9465GQW Chip WQFN-16L 3x3 RICHTEK Note 1. The total CIN of slave charger between PMID pin of main charger is 10μF at least. Copyright © 2018 Richtek Technology Corporation. All rights reserved. DS9465-01 November 2018 is a registered trademark of Richtek Technology Corporation. www.richtek.com 3 RT9465 Functional Block Diagram VIN OVP/ UVP Pre-regulator REG BOOT Oscillator EN Digital Control Q1 Controller SW SCL 2 I C Control Q2 PGND SDA INT Protection Q3 Copyright © 2018 Richtek Technology Corporation. All rights reserved. www.richtek.com 4 Battery Monitoring BAT+ BAT- Junction Temperature Monitoring AGND is a registered trademark of Richtek Technology Corporation. DS9465-01 November 2018 RT9465 Absolute Maximum Ratings           (Note 2) Supply Input Voltage, VIN ----------------------------------------------------------------------------------------------BOOT -----------------------------------------------------------------------------------------------------------------------SW ---------------------------------------------------------------------------------------------------------------------------REG, SCL, SDA, EN, INT, BAT+, BAT- -----------------------------------------------------------------------------Power Dissipation, PD @ TA = 25°C WQFN-16L 3x3 -----------------------------------------------------------------------------------------------------------Package Thermal Resistance (Note 3) WQFN-16L 3x3, θJA ------------------------------------------------------------------------------------------------------WQFN-16L 3x3, θJC -----------------------------------------------------------------------------------------------------Lead Temperature (Soldering, 10sec.) -------------------------------------------------------------------------------Junction Temperature ----------------------------------------------------------------------------------------------------Storage Temperature Range -------------------------------------------------------------------------------------------ESD Susceptibility (Note 4) HBM (Human Body Model) ---------------------------------------------------------------------------------------------- Recommended Operating Conditions      −0.3V to 22V −0.3V to 22V −0.3V to 20V −0.3V to 6V 3.33W 30°C/W 7.5°C/W 260°C 150°C −65°C to 150°C 2kV (Note 5) Supply Input Voltage, VIN ----------------------------------------------------------------------------------------------Charge Current, IBAT ----------------------------------------------------------------------------------------------------Battery Voltage, VBAT --------------------------------------------------------------------------------------------------Junction Temperature Range -------------------------------------------------------------------------------------------Ambient Temperature Range -------------------------------------------------------------------------------------------- 3.9V to 14V 0.6A to 3A 3.8V to 5.06V −40°C to 125°C −40°C to 85°C Electrical Characteristics (VIN = 5V, VBAT = 4.2V, L = 1μH, CIN_S = 2.2μF, COUT = 10μF, TA = 25°C, unless otherwise specified) Parameter Symbol Test Conditions Min Typ Max Unit Quiescent Current VIN Supply Current Leakage Current from Battery I(VIN)_SW PWM is switching, VIN = 5V, VBAT+ = 3.8V -- 8 -- I(VIN)_SW PWM is switching, VIN = 9V, VBAT+ = 3.8V -- 28 -- I(VIN)_no_SW PWM is non-switching, VIN = 5V, VBAT+ = 4.4V -- -- 2 IBAT_leak Charger disable, VBAT = 3.8V -- -- 1 A mA VIN/VBAT Power up VIN Under-Voltage Protection VUVP 3.67 3.8 3.93 V VIN Under-Voltage Protection Hysteresis VUVP_HYS 120 200 280 mV 3.9 -- 13.4 V Input Power Regulation Input Voltage Regulation Range VMIVR I2C programmable per 0.1V Copyright © 2018 Richtek Technology Corporation. All rights reserved. DS9465-01 November 2018 is a registered trademark of Richtek Technology Corporation. www.richtek.com 5 RT9465 Parameter VMIVR Accuracy Symbol Test Conditions VMIVR_ACC MIVR = 4.4V, 9V IC Active Threshold Voltage VUVLO VIN rising IC Active Hysteresis VUVLO_HYS VIN falling from UVLO VIN OVP Threshold Voltage VINOVP VIN rising VIN OVP Hysteresis VINOVP_HYS Min Typ Max Unit 3 -- 3 % 3.05 3.3 3.55 V -- 150 -- mV 13.5 14.5 15.5 V -- 350 -- mV Protection VIN VBAT Battery OVP VBATOVP (VBATOVP_Rising - VCV)/VCV 102 104 106 % Battery UVP VBATUVP VBAT falling 2.3 2.4 2.5 V Over-Temperature Protection OTP Thermal shutdown -- 160 -- o OTP Hysteresis OTP_HYS -- 10 -- o Thermal Regulation Threshold TR Charge current begins to reduce -- 120 -- o VOREG I2C programmable per 20mV 3.8 -- 5.06 V Thermal Protection C C C Battery Charging Interval End of Charge Battery Voltage Regulation Battery Voltage Accuracy VOREG_ACC Temperature = 0 to 85 C 1 -- 1 % ICHG I2C programmable per 0.1A 0.6 -- 3 A VIN = 5V, charge current > 1A 15 -- 15 VIN = 9V, 12V, charge current > 1A 10 -- 10 VIN = 5V, charge current < 1A 150 -- 150 VIN = 9V, 12V, charge current < 1A 100 -- 100 I2C programmable per 0.1A 0.6 -- 1.6 A VIN = 5V, 9V, 12V, IEOC setting > 1A 15 -- 15 % VIN = 5V, 9V, 12V, IEOC setting < 1A 150 -- 150 mA o Fast Charge Charging Current ICHG Accuracy ICHG_ACC End of Charging Current IEOC IEOC Accuracy IEOC_ACC % mA Battery Charger High-Side On-Resistance RON(Q1) From VIN to SW 17 21.5 26 m Low-Side On-Resistance RON(Q2) From SW to PGND 17 21.5 26 m VIN = 9V, VBAT = 3.8V, and ICHG = 2.5A -- 89.5 -- % MHz Charging Efficiency Switching Frequency (1.5MHz) fOSC1 I2C programmable 1.5 MHz 1.35 1.5 1.65 Switching Frequency (750kHz) fOSC2 I2C programmable 0.75MHz 0.675 0.75 0.825 MHz Copyright © 2018 Richtek Technology Corporation. All rights reserved. www.richtek.com 6 is a registered trademark of Richtek Technology Corporation. DS9465-01 November 2018 RT9465 Parameter Symbol Test Conditions Frequency Accuracy Maximum Duty Cycle At minimum voltage input Minimum Duty Cycle VREG Regulation VREG EN Pull Low REN VIN = 5V Min Typ Max Unit 10 -- 10 % -- 95 -- % 0 -- -- % 4.74 4.9 5.06 V 180 500 820 k -- -- 0.4 V 2 I C Characteristics Output Low Voltage VOL IDS = 10mA SCL, SDA Input Logic High Threshold Voltage VIH 1.3 -- -- V SCL, SDA Input Logic Low Threshold Voltage VIL -- -- 0.4 V -- -- 400 kHz -- -- 1 pF -3 -- 3 o SCL Clock Load Capacitance Junction Temperature Monitor Accuracy Control I/O Pin CLOAD VPULL_UP = 1.8V EN Input Threshold Voltage VIH Logic high threshold 1.2 -- -- V EN Input Threshold Voltage VIL Logic low threshold -- -- 0.4 V -- -- 500 S Device Turn-On Delay Time After EN Pull-High C Note 2. Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions may affect device reliability. Note 3. θJA is measured under natural convection (still air) at TA = 25°C with the component mounted on a high effectivethermal-conductivity four-layer test board on a JEDEC 51-7 thermal measurement standard. θJC is measured at the exposed pad of the package. Note 4. Devices are ESD sensitive. Handling precaution is recommended. Note 5. The device is not guaranteed to function outside its operating conditions. Copyright © 2018 Richtek Technology Corporation. All rights reserved. DS9465-01 November 2018 is a registered trademark of Richtek Technology Corporation. www.richtek.com 7 RT9465 Typical Operating Characteristics Charging Current vs. VBAT CV vs. Temperature 1.08 4.50 CV set = 4.44V 1.07 Charging Current (A)1 4.45 4.40 CV set = 4.36V CV (V) 4.35 4.30 4.25 CV set = 4.2V 4.20 1.06 VBUS = 9V 1.05 VBUS = 12V 1.04 1.03 VBUS = 5V 1.02 4.15 1.01 4.10 1.00 ICC = 1A -50 -25 0 25 50 75 100 3.3 3.4 3.5 3.6 3.7 3.8 3.9 4.0 4.1 4.2 4.3 4.4 125 VBAT (V) Temperature (°C) Efficiency vs. Output Current VBUS = 5V Efficiency (%) Efficiency (%) Efficiency vs. Output Current 100 98 96 94 92 90 88 86 84 82 80 78 76 74 VBUS = 12V VBUS = 9V CV set = 3.8V 0.0 0.5 1.0 1.5 2.0 2.5 Output Current (A) Copyright © 2018 Richtek Technology Corporation. All rights reserved. www.richtek.com 8 3.0 100 98 96 94 92 90 88 86 84 82 80 78 76 74 VBUS = 5V VBUS = 12V VBUS = 9V CV set = 4.2V 0.0 0.5 1.0 1.5 2.0 2.5 3.0 Output Current (A) is a registered trademark of Richtek Technology Corporation. DS9465-01 November 2018 RT9465 I2C Register Information I2C Slave Address : 1001011 (4BH) R : Read only R/W : Read and write R/C : Read automatically clear Register Address : 0x00, Register Name : CHG_CTRL0 Bit Bit Name Default WDT RST REG RST Type Description 7 RST_REG 0 Y Y R/W All registers reset bit. 0 : No action. (default) 1 : Reset all registers. (Notice : This bit will be reset to "0" after reset procedure finish) 6:0 Reserved 0000000 Y Y R/W Reserved Register Address : 0x01, Register Name : CHG_CTRL1 Bit Bit Name Default WDT RST REG RST Type Description 7 CHG_EN 0 Y Y R/W Charging enable 0 : CHG is disabled (default) 1 : CHG is enabled 6:4 Reserved 100 Y Y R/W Reserved 3 IRQ_pulse 0 Y Y R/W IRQ remind function 0 : IRQ reminding is disabled (default) 1 : IRQ reminding is enabled. If IRQ is triggered and no check action, IRQ pin will be released with every 2s interval and be triggered again. 2:0 Reserved 000 Y Y R/W Reserved Copyright © 2018 Richtek Technology Corporation. All rights reserved. DS9465-01 November 2018 is a registered trademark of Richtek Technology Corporation. www.richtek.com 9 RT9465 Register Address : 0x02, Register Name : CHG_CTRL2 Bit 7 Bit Name Sel_SWFreq Default 0 WDT RST REG RST Y Y Type Description R/W The switching frequency selection bit 0 : The switching frequency is 1.5MHz. (default) 1 : The switching frequency is 0.75MHz. 6 FixFreq 0 Y Y R/W Charger switching frequency 0 : Charger switching frequency is varied (default) 1 : Charger switching frequency is fixed 5 OSCSS_EN 0 Y Y R/W Charger spread spectrum enable 0 : Disabled (default) 1 : Enabled 4:0 Reserved 00000 Y Y R/W Reserved Register Address : 0x03, Register Name : CHG_CTRL3 Bit Bit Name Default WDT RST REG RST Type Description 7:2 VOREG 010100 Y Y R/W 1:0 Reserved 00 Y Y R/W Battery regulation voltage. The delta-V of the battery regulation voltage is 20mV. 000000 : 3.8V 000001 : 3.82V 000010 : 3.84V … 010100 : 4.2V (default) 010101 : 4.22V … 101001 : 4.62V 101010 : 4.64V 101011 : 4.66V ... 111111 : 5.06V Reserved Type Description Register Address : 0x04, Register Name : CHG_CTRL4 Bit Bit Name Default WDT RST REG RST 7:6 THREG 11 Y Y R/W Charger thermal regulation threshold 00 : 60°C 11 : 80°C 10 : 100°C 11 : 120°C (default) 5:0 Reserved 000000 Y Y R/W Reserved Copyright © 2018 Richtek Technology Corporation. All rights reserved. www.richtek.com 10 is a registered trademark of Richtek Technology Corporation. DS9465-01 November 2018 RT9465 Register Address : 0x05, Register Name : CHG_CTRL5 Bit Bit Name Default WDT RST REG RST Type Description 7:1 VMIVR[6:0] 0000101 Y Y R/W Input MIVR threshold setting 0000000 : 3.9V 0000001 : 4V 0000010 : 4.1V 0000011 : 4.2V 0000100 : 4.3V 0000101 : 4.4V (default) 0000110 : 4.5V … 0011110 : 6.9V 0011111 : 7V … 0110010 : 8.9V 0110011 : 9V … 1010000 : 11.9V 1010001 : 12V … 1011111 : 13.4V 1100000 to 1111111 : 13.4V 0 MIVR_EN 1 Y Y R/W MIVR loop enable 0 : MIVR loop disable 1 : MIVR loop enable (default) Register Address : 0x06, Register Name : CHG_CTRL6 Bit Bit Name Default WDT RST REG RST Type Description 7:3 ICHG[4:0] 10100 Y Y R/W Charging regulation current 00000 to 00110 : 0.6A ... 01001 : 0.9A 01010 : 1A 01011 : 1.1A ... 10011 : 1.9A 10100 : 2A (default) ... 11001 : 2.5A 11010 : 2.6A … 11101 : 2.9A 11110 to 11111 : 3A 2:0 Reserved 000 Y Y R/W Reserved Copyright © 2018 Richtek Technology Corporation. All rights reserved. DS9465-01 November 2018 is a registered trademark of Richtek Technology Corporation. www.richtek.com 11 RT9465 Register Address : 0x07, Register Name : CHG_CTRL7 Bit Bit Name Default WDT RST REG RST Type Description 7:4 IEOC[3:0] 0101 Y Y R/W EOC current setting 0000 to 0100 : 600mA 0101 : 600mA (default) 0110 : 700mA 0111 : 800mA 1000 : 900mA 1001 : 1000mA 1010 : 1100mA 1011 : 1200mA 1100 : 1300mA 1101 : 1400mA 1110 : 1500mA 1111 : 1600mA 3 EOC_EN 1 Y Y R/W IEOC enable/disable 0 : Disable 1 : Enable (default) R/W EOC deglitch time 000 : 120s 001 : 180s 010 : 240s 011 : 360s 100 : 2ms (default) 101 : 4ms 110 : 8ms 111 : 16ms 2:0 CHG_TDEG_ EOC[2:0] 100 Y Y Register Address : 0x08, Register Name : CHG_CTRL8 Bit 7 Bit Name TE Default 1 WDT RST REG RST Y Y Type Description R/W Termination enable 0 : Disable charge current termination 1 : Enable charge current termination (default) 6:5 EOC_TIMER[1 :0] 00 Y Y R/W EOC back-charging time 00 : 0mins (default) 01 : 30mins 10 : 45mins 11 : 60mins 4:0 Reserved 00000 Y Y R/W Reserved Copyright © 2018 Richtek Technology Corporation. All rights reserved. www.richtek.com 12 is a registered trademark of Richtek Technology Corporation. DS9465-01 November 2018 RT9465 Register Address : 0x09, Register Name : CHG_CTRL9 Bit Bit Name 7:5 WT_FC[2:0] Default 000 WDT RST REG RST Y Y Type Description R/W Fast charge timer 000 : 4hrs (default) 001 : 6hrs 010 : 8hrs 011 : 10hrs 100 : 12hrs 101 : 14hrs 110 : 16hrs 111 : 20hrs 4 TMR2X_EN 0 Y Y R/W Double charger timer during MIVR, and thermal regulation 0 : Disable 2x extended charger timer (default) 1 : Enable 2x extended charger timer 3 TMR_EN 0 Y Y R/W Charger timer enable/disable 0 : Disable (default) 1 : Enable 2 TMR_PAUSE 0 Y Y R/W Timer control bit 0 : Timer is active (default) 1 : Timer is pause 1:0 Reserved 00 Y Y R/W Reserved Register Address : 0x0A, Register Name : CHG_CTRL10 Bit Bit Name Default WDT RST REG RST Type 7 WDT_EN 0 Y Y R/W Watchdog timer enable/disable 0 : Disable (default) 1 : Enable R/W Waiting timer to reset I2C setup after watchdog is asserted 0 : 200ms 1 : 500ms (default) 6 WDT_TRST 1 Y Y Description 5:4 WDT[1:0] 01 Y Y R/W Watchdog timer, from WDTEN is enabled to watchdog IRQ, clear timer by I2C access 00 : 8s 01 : 40s (default) 10 : 80s 11 : 160s 3:0 Reserved 0000 Y Y R/W Reserved Copyright © 2018 Richtek Technology Corporation. All rights reserved. DS9465-01 November 2018 is a registered trademark of Richtek Technology Corporation. www.richtek.com 13 RT9465 Register Address : 0x0C, Register Name : CHG_CTRL12 Bit 7:4 3 Bit Name ADC_RPT[3:0] TEMP_EN Default 0000 1 WDT RST REG RST Y Y Y Y Type Description R Report the TEMP_ADC result, sampling every 64T (22s) and average times (352s if TEMP_AVG = 0) 0000 : 60 degree 0010 : >64 degree 0011 : >68 degree 0100 : >72 degree 0101 : >76 degree 0110 : >80 degree 0111 : >84 degree 1000 : >88 degree 1001 : >92 degree 1010 : >96 degree 1011 : >100 degree 1100 : >104 degree 1101 : >108 degree 1110 : >112 degree 1111 : >116 degree R/W Temperature ADC measurement function enable/disable 0 : Disable 1 : Enable (default) 2 TEMP_AVG 0 Y Y R/W Choose the average times for TEMP_ADC code calculate 0 : 16times (default) 1 : 32times 1:0 Reserved 00 Y Y R/W Reserved Copyright © 2018 Richtek Technology Corporation. All rights reserved. www.richtek.com 14 is a registered trademark of Richtek Technology Corporation. DS9465-01 November 2018 RT9465 Register Address : 0x0D, Register Name : CHG_CTRL13 Bit Bit Name ADC_HIGH [3:0] 7:4 3:0 ADC_OFFSET [3:0] Default 0011 0000 WDT RST REG RST Y Y Copyright © 2018 Richtek Technology Corporation. All rights reserved. DS9465-01 November 2018 Y Y Type Description R/W Temperature sensor threshold set. The IRQ "TEMP_H" will be trigger when the ADC code is larger than ADC_HIGH. 0000 : 60 degree 0010 : >64 degree 0011 : >68 degree (default) 0100 : >72 degree 0101 : >76 degree 0110 : >80 degree 0111 : >84 degree 1000 : >88 degree 1001 : >92 degree 1010 : >96 degree 1011 : >100 degree 1100 : >104 degree 1101 : >108 degree 1110 : >112 degree 1111 : >116 degree R/W Temperature sensor threshold set. The IRQ "TEMP_L" will be trigger when ADC code is smaller than (ADC_HIGH ADC_OFFSET) after "TEMP_H" trigged. 0000 : 4 degree (default) 0001 : 4 degree 0010 : 8 degree 0011 : 12 degree 0100 : 16 degree 0101 : 20 degree 0110 : 24 degree 0111 : 28 degree 1000 : 32 degree 1001 : 36 degree 1010 : 40 degree 1011 : 44 degree 1100 : 48 degree 1101 : 52 degree 1110 : 56 degree 1111 : 60 degree is a registered trademark of Richtek Technology Corporation. www.richtek.com 15 RT9465 Register Address : 0x20, Register Name : SYSTEM1 Bit Bit Name Default WDT RST REG RST Type Description Charger status bit 00 : Ready (default) 01 : Charge in progress 10 : Charge done 11 : Fault 7:6 CHG_STAT 00 Y Y R 5:4 Reserved 00 Y Y R/W 3:1 VERSION[2:0] 000 N N R Version code 0 TRIMDONE 0 N N R Trim done Reserved Register Address : 0x30, Register Name : CHG_STATC Bit Bit Name Default WDT RST REG RST Type 7 PWR_RDY 0 Y Y R Power ready status bit 0 : Input power is bad, VIN < VUVP (default) 1 : Input power is good, VIN > VUVP R Charger warning. Input voltage MIVR loop active. 0 : MIVR loop is not active (default) 1 : MIVR loop is active Charger warning. Thermal regulation loop active. 0 : Thermal regulation loop is not active (default) 1 : Thermal regulation loop is active 6 CHG_MIVR 0 Y Y 5 CHG_TREG 0 Y Y R 4:0 Reserved 00000 Y Y R/W Description Reserved Register Address : 0x31, Register Name : CHG_FAULT Default WDT RST REG RST Bit Bit Name 7 CHG_ VBUSOV 0 Y Y R VBUS over-voltage protection. Set when VBUS > VIN_OVP is detected. 0 : VBUS is not over-voltage (default) 1 : VBUS is over-voltage 6 CHG_ VBATSUV 0 Y Y R Charger fault. Battery UVP. 0 : Battery is not UVP (default) 1 : Battery is UVP 5 CHG_ VBATOV 0 Y Y R Charger fault. Battery OVP. 0 : Battery is not OVP (default) 1 : Battery is OVP 4:0 Reserved 00000 Y Y R/W Copyright © 2018 Richtek Technology Corporation. All rights reserved. www.richtek.com 16 Type Description Reserved is a registered trademark of Richtek Technology Corporation. DS9465-01 November 2018 RT9465 Register Address : 0x32, Register Name : CHG_IRQ1 Bit Bit Name Default WDT RST REG RST Type Description 7 OTPI 0 Y Y R/C Thermal shutdown fault 0 : No event occurs (default) 1 : Event occurs 6 CHG_ ADPBADI 0 Y Y R/C Charger bad adaptor fault 0 : No event occurs (default) 1 : Event occurs 5 CHG_TMRI 0 Y Y R/C Charger timer time-out fault 0 : No event occurs (default) 1 : Event occurs 4 TEMP_H 0 Y Y R/C Temperature too high fault 0 : No event occurs (default) 1 : Event occurs 3 TEMP_L 0 Y Y R/C Temperature too low fault 0 : No event occurs (default) 1 : Event occurs 2 Reserved 0 Y Y R/W Reserved R/C Status of each CHG_STATC register (Reg0x30) is changed 0 : No event occurs (default) 1 : Event occurs R/C Status of each CHG_FAULT register (Reg0x31) is changed 0 : No event occurs (default) 1 : Event occurs 1 0 CHG_STATCI CHG_FAULTI 0 0 Y Y Y Y Register Address : 0x33, Register Name : CHG_IRQ2 Bit Bit Name Default WDT RST REG RST Type Description 7 CHG_IEOCI 0 Y Y R/C Charging current is lower than EOC current ever occurs 0 : No event occurs (default) 1 : Event occurs 6 CHG_TERMI 0 Y Y R/C Charge terminated event 0 : No event occurs (default) 1 : Event occurs 5 SSFINISHI 0 Y Y R/C Charger soft-start finishes event 0 : No event occurs (default) 1 : Event occurs 4 WDTMRI 0 Y Y R/C Watch dog timer timeout fault 0 : No event occurs (default) 1 : Event occurs 3:0 Reserved 0000 Y Y R/W Reserved Copyright © 2018 Richtek Technology Corporation. All rights reserved. DS9465-01 November 2018 is a registered trademark of Richtek Technology Corporation. www.richtek.com 17 RT9465 Register Address : 0x40, Register Name : CHG_STATC_Mask Bit Bit Name Default WDT RST REG RST Type 7 PWR_RDYM 0 Y Y R/W Power ready interrupt mask 0 : Interrupt is not masked (default) 1 : Interrupt is masked 6 CHG_MIVRM 0 Y Y R/W Input voltage MIVR loop active interrupt mask 0 : Interrupt is not masked (default) 1 : Interrupt is masked 5 CHG_TREGM 0 Y Y R/W Thermal regulation loop active interrupt mask 0 : Interrupt is not masked (default) 1 : Interrupt is masked 4:0 Reserved 00000 Y Y R/W Reserved Description Register Address : 0x41, Register Name : CHG_FAULT_Mask Bit Bit Name Default WDT RST REG RST Type Description 7 CHG_ VBUSOVM 1 Y Y R/W VBUS over-voltage protection interrupt mask 0 : Interrupt is not masked 1 : Interrupt is masked (default) 6 CHG_ VBATSUVM 1 Y Y R/W Battery UVP interrupt mask 0 : Interrupt is not masked 1 : Interrupt is masked (default) 5 CHG_ VBATOVM 1 Y Y R/W Battery OVP interrupt mask 0 : Interrupt is not masked 1 : Interrupt is masked (default) 4:0 Reserved 00000 Y Y R/W Reserved Copyright © 2018 Richtek Technology Corporation. All rights reserved. www.richtek.com 18 is a registered trademark of Richtek Technology Corporation. DS9465-01 November 2018 RT9465 Register Address : 0x42, Register Name : CHG_IRQ1_Mask Bit Bit Name Default WDT RST REG RST Type 7 OTPM 1 Y Y R/W Thermal shutdown fault interrupt mask 0 : Interrupt is not masked 1 : Interrupt is masked (default) 6 CHG_ ADPBADM 1 Y Y R/W Charger bad adaptor fault interrupt mask 0 : Interrupt is not masked 1 : Interrupt is masked (default) 5 CHG_TMRM 1 Y Y R/W Charger timer time-out fault interrupt mask 0 : Interrupt is not masked 1 : Interrupt is masked (default) 4 TEMP_HM 1 Y Y R/W Temperature too high fault interrupt mask 0 : Interrupt is not masked 1 : Interrupt is masked (default) 3 TEMP_LM 1 Y Y R/W Temperature too low fault interrupt mask 0 : Interrupt is not masked 1 : Interrupt is masked (default) 2 Reserved 1 Y Y R/W Reserved 1 CHG_ STATCM R/W Status of each CHG_STATC register (Reg0x30) changed interrupt mask 0 : Interrupt is not masked 1 : Interrupt is masked (default) R/W Status of each CHG_FAULT register (Reg0x31) changed interrupt mask 0 : Interrupt is not masked 1 : Interrupt is masked (default) 0 CHG_FAULTM 1 1 Y Y Y Y Description Register Address : 0x43, Register Name : CHG_IRQ2_Mask Bit Bit Name Default WDT RST REG RST Type Description 7 CHG_IEOCM 1 Y Y R/C Charging current is lower than EOC current interrupt mask 0 : Interrupt is not masked 1 : Interrupt is masked (default) 6 CHG_TERMM 1 Y Y R/C Charge terminated event interrupt mask 0 : Interrupt is not masked 1 : Interrupt is masked (default) 5 SSFINISHM 1 Y Y R/C Charger soft-start finishes event interrupt mask 0 : Interrupt is not masked 1 : Interrupt is masked (default) 4 WDTMRM 1 Y Y R/C Watch dog timer timeout fault interrupt mask 0 : Interrupt is not masked 1 : Interrupt is masked (default) 3:0 Reserved 1111 Y Y R/W Reserved Copyright © 2018 Richtek Technology Corporation. All rights reserved. DS9465-01 November 2018 is a registered trademark of Richtek Technology Corporation. www.richtek.com 19 RT9465 Application Information Device Power On The internal bias circuit is powered from VIN. The device will be powered on when the VIN is higher than VUVLO threshold and EN pin is higher than 1.2V. In VIN > VUVLO and EN pin from low logic to high logic condition, the device requires maximum 500μs turn on delay time. system needs to reduce the slave charger's charge current to next step. When the main charger triggers the IEOC event and slave charger's ICHG is at 600mA, the system needs to turn off slave charger and main charger takes over the constant voltage state period. Dual charger charge Dual Charger Program Flow www.richtek.com 20 VBAT (V) RT9466 IR Compensation RT9466 Charge current RT9465 Charge current VBAT Time (Hours) Precharge Battery charging state Main charger Pre-charge state (Main charger duty) Pre-charge parameter setting Fast charge Constant voltage Slave charger Constant current charge state (Dual charger work) 1. Set CV point of main charger 2. Set charge current of main charger 3. Set IEOC Constant voltage state (Main charger duty) Constant voltage state parameter setting EOC state (Main charger duty) EOC parameter setting Copyright © 2018 Richtek Technology Corporation. All rights reserved. End of charge IBAT (A) A main charger (RT9466) is required in the system to manage pre-charge, fast-charge and constant voltage state. Below charge profile and program flow show the dual charge interactions. Once battery voltage higher than precharge voltage, system needs to enable slave charger (RT9465) to increase charge current and reduce fast charge period. The CV setting of slave charger needs to higher than main charger (include main charger's IR compensation). If main charger triggers IEOC event, the Main charger charge 1. Set battery regulation voltage (0x03). The setting value needs higher than CV+IR compensation of main charger. 2. Set initial charge regulation current (0x06) If main charger charge current