EVKT-MP2662

MP2662 500mA Single-Cell Li-ion Battery Charger with Power Path Management, 1mA Termination and 200mv. POR Reset by REG_RST Reset by WTD R/W REG 08h (Default: 0100 0000) 7 WATCHDOG_FAULT 0 N/A N/A r 6 Rev [1] 1 N/A N/A r 5 Rev [0] 0 N/A N/A r 4 CHG_STAT [1] 0 N/A N/A r 3 CHG_STAT [0] 0 N/A N/A r 2 PPM_STAT 0 N/A N/A 1 PG_STAT 0 N/A 0 THERM_STAT 0 N/A Bit Name MP2662 Rev. 1.11 3/17/2023 Description 0: Normal 1: Watchdog timer expiration 00: reserved 01: reserved 10: MP2662 11: reserved Comment Normal (0) Revision number. Default: (10) 00: Not charging 01: Pre charge 10: Charge 11: Charge done Not charging (00) r 0: No PPM 1: In PPM No PPM (0) N/A r 0: Power fail 1: Power good Power fail (0) N/A r 0: No thermal regulation 1: In thermal regulation No thermal regulation (0) MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2023 MPS. All Rights Reserved. 30 MP2662 – 0.5A, 1-CELL CHARGER W/ I2C CONTROL, POWER PATH R/W Bit Name 7 EN_SHIPPING_DGL[1] 0 Y N r/w 6 EN_SHIPPING_DGL[0] 0 Y N r/w 5 VIN_FAULT 0 N/A N/A r 0: Normal 1: Input fault (OVP or bad source) Normal (0) 4 THEM_SD 0 N/A N/A r 0: Normal 1: Thermal shutdown Normal (0) 3 BAT_FAULT 0 N/A N/A r 0: Normal 1: Battery OVP Normal (0) 2 STMR_FAULT 0 N/A N/A r 0: Normal 1: Safety timer expiration Normal (0) 1 NTC_FAULT [1] 0 N/A N/A r 0: Normal 1: NTC hot Normal (0) 0 NTC_FAULT [0] 0 N/A N/A r 0: Normal 1: NTC cold Normal (0) R/W Reset by WTD Reset by REG_RST POR REG 09h (Default: 0000 0000) Description 00: 1s 01: 2s 10: 4s 11: 8s Comment Enter shipping mode deglitch time Default: 1s (00) POR Reset by REG_RST Reset by WTD REG 0Ah (Default: 1110 0000) (9) 7 ADDR[2] 1 N/A N/A N/A 6 ADDR[1] 1 N/A N/A N/A 5 ADDR[0] 1 N/A N/A N/A 4 Reserved 0 N/A N/A N/A 3 Reserved 0 N/A N/A N/A 2 Reserved 0 N/A N/A N/A 1 Reserved 0 N/A N/A N/A 0 Reserved 0 N/A N/A N/A Bit Name Description 001: 01h 010: 02h 011: 03h 100: 04h 101: 05h 110: 06h 111: 07h Comment IC Address. Default: 111 (07h) Note: 10) This register is for one-time programming only and is not accessible. MP2662 Rev. 1.11 3/17/2023 MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2023 MPS. All Rights Reserved. 31 MP2662 – 0.5A, 1-CELL CHARGER W/ I2C CONTROL, POWER PATH ONE-TIME PROGRAMMING MAP # 0x01 0x02 0x03 0x04 0x05 0x07 0x0A Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0 CEB N/A N/A ICC: 8mA - 456mA / 8mA step N/A ITERM: 1mA - 31mA/2mA step VBATT_REG: 3.6V - 4.545V / 15mV step N/A WATCHDOG N/A EN_VINLOOP N/A Address N/A N/A N/A N/A ONE-TIME PROGRAMMING DEFAULT One-Time Programmable Items CEB ICC ITERM VBATT_REG WATCHDOG EN_VINLOOP Address MP2662 Rev. 1.11 3/17/2023 Default Charge disable 128mA 3mA 4.2V 40s Enable 07h MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2023 MPS. All Rights Reserved. 32 MP2662 – 0.5A, 1-CELL CHARGER W/ I2C CONTROL, POWER PATH STATE CONVERSION CHART Battery Discharge Mode Only Power System Mode BFET Off BFET On Shipping Mode IN Plug-in and HIZ Quit IN Plug-out or HIZ Entry IN Plug-out or HIZ Entry BFET Off or Disable Charge IN Plug-in and HIZ Quit BFET On and Enable Charge PSYS < PIN Battery Charge Mode Battery Supplement Mode PSYS > PIN Figure 16: State Machine Conversion MP2662 Rev. 1.11 3/17/2023 MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2023 MPS. All Rights Reserved. 33 MP2662 – 0.5A, 1-CELL CHARGER W/ I2C CONTROL, POWER PATH CONTROL FLOWCHART POR VIN>VIN_UVLO or VBATT>VBATT_UVLO? No Yes Sleep Comparator Active, Battery FET driver power up I2C Write? Yes No Default Mode Registers set as default Host Mode Host Programs Registers Yes I2C Watchdog Timer Disabled Yes No I2C Watchdog Timer Reset(10) I2C Watchdog Timer Reset No No Watchdog Timer Expired? Yes Figure 17: Default Mode and Host Mode Selection Note: 11) Once the watchdog timer expires, the I2C watchdog timer must be reset or will not be valid in the next cycle. MP2662 Rev. 1.11 3/17/2023 MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2023 MPS. All Rights Reserved. 34 MP2662 – 0.5A, 1-CELL CHARGER W/ I2C CONTROL, POWER PATH CONTROL FLOWCHART (continued) POR VDD is powered by Max (VIN, VBATT) No VDD>2V? Yes I2C is ready HIZ Mode? Yes HIZ Mode, SYS is supplied by BATT No EN BG NG VIN, Q1 is Off No All happen? VIN_OVP > VIN > VIN_UVLO VIN > VBATT + VHDRM Yes Good VIN, Q1 is turned on and regulated No ENCHG? Yes Charge Fault Yes Any Fault? No ENCHG Regulate Q2 Figure 18: Input Power Start-Up Flow Chart MP2662 Rev. 1.11 3/17/2023 MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2023 MPS. All Rights Reserved. 35 MP2662 – 0.5A, 1-CELL CHARGER W/ I2C CONTROL, POWER PATH CONTROL FLOWCHART (continued) ENCHG Charge Mode? VBATT>VBATT_REG VBATT 900mA, if IIN_LIM is 50mA 170mA, or IIN>1.7A if IIN_LIM is 200mA - 500mA No No No VSYS < 1.5V? No Yes No VSYS < 1.5V? & IIN > IIN_LIM? Fold back BATT_to_SYS OC Threshold to 1/2 Yes Yes Yes IBATT > IDSCHG? Start 60μs Timer Yes No Start 60μs Timer No 60μs expires? 60μs expires? Yes Yes Turn Off Q1 & Q2 Start 800μs Timer Turn Off Q1 & Q2 Start 800μs Timer No 800μs expires? No 800μs expires? Yes Yes Turn on Q1 & Q2 Turn on Q1 & Q2 Figure 20: System Short-Circuit Protection MP2662 Rev. 1.11 3/17/2023 MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2023 MPS. All Rights Reserved. 37 MP2662 – 0.5A, 1-CELL CHARGER W/ I2C CONTROL, POWER PATH APPLICATION INFORMATION VDD Selecting a Resistor Divider for the NTC Sensor The NTC pin uses a resistor divider from the input source (VDD) to sense the battery temperature. The two resistors (RT1 and RT2) allow the high temperature limit and low temperature limit to be programmed independently (see Figure 21). The IC can fit most types of NTC resistors and different temperature operation range requirements with the two extra resistors. For a given NTC thermistor, the RT1 and RT2 values depend on the type of NTC resistor used and can be calculated with Equation (1) and Equation (2): RT2 = Low Temp Threshold VCOLD RT1 NTC RNTC RT2 Hot Temp Threshold VHOT Figure 21: NTC Function Block ( VCOLD − VHOT )  RNTCH  RNTCL ( VHOT − VCOLD VHOT )  RNTCL − ( VCOLD − VCOLD VHOT )  RNTCH (1) 1-VCOLD  (RT2 // RNTCL ) VCOLD (2) RT1 = Where RNTCH is the value of the NTC resistor at the high temperature of the required operating temperature range, and RNTCL is the value of the NTC resistor at a low temperature. For example, for a NCP18XH103 thermistor, RNTCL is 27.219kΩ at 0°C, and RNTCH is 4.161kΩ at 50°C. Using Equation (1) and Equation (2), calculate RT1 = 7.33kΩ and RT2 = 27.22kΩ, assuming that the NTC window is between 0°C and 50°C and using the VCOLD and VHOT values from the EC table. Selecting the External Capacitor Like most low dropout regulators, the MP2662 requires external capacitors for regulator stability and voltage spike immunity. The device is specifically designed for portable applications requiring minimal board space and few components, so these capacitors must be selected correctly for optimal performance. The IC is designed specifically to work with a very small ceramic output capacitor. A ceramic capacitor (dielectric types X5R or X7R) at least 10µF is suitable for the application circuit. For the MP2662, the output capacitor should be connected between SYS and GND with thick traces and a small loop area. A capacitor from BATT to GND is required. A at least 4.7µF ceramic capacitor (dielectric types X5R or X7R) is suitable for the MP2662 application circuit. A capacitor between VDD and GND is used to stabilize the VDD voltage to power the internal control and logic circuit. The typical value of this capacitor is 100nF. An input capacitor is required for stability. Connect a at least 4.7µF ceramic capacitor (dielectric types X5R or X7R) between IN to GND for stable operation over the full load current range. MP2662 Rev. 1.11 3/17/2023 MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2023 MPS. All Rights Reserved. 38 MP2662 – 0.5A, 1-CELL CHARGER W/ I2C CONTROL, POWER PATH PCB Layout Guidelines Efficient PCB layout is critical for stable operation. For best results, follow the guidelines below. 1. Place the external capacitors as close to the IC as possible to ensure the smallest input inductance and ground impedance. 2. Place the PCB trace connecting the capacitor between VDD and GND very close to the IC. 3. Keep GND for the I2C wire clean. 4. Place the I2C wire in parallel. MP2662 Rev. 1.11 3/17/2023 MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2023 MPS. All Rights Reserved. 39 MP2662 – 0.5A, 1-CELL CHARGER W/ I2C CONTROL, POWER PATH TYPICAL APPLICATION CIRCUIT 5V A1 C1 4.7μF IN B3 VDD C5 100nF B1 NTC RT1 SYS INT MP2662 A2 SYS C2 10μF B2 VDD Push Button R3 100kΩ RT2 RNTC BATT C1 C2 Host GND SDA A3 C3 BATT C3 4.7μF SCL Figure 22: MP2662 Typical Application Circuit with 5V Input Table 5: Key BOM of Figure 22 MP2662 Rev. 1.11 3/17/2023 Qty Ref Value Description Package Manufacture 1 C1 4.7µF Ceramic Capacitor, 25V, X5R or X7R 0603 Any 1 C3 4.7µF Ceramic Capacitor, 16V, X5R or X7R 0603 Any 1 C2 10µF 0603 Any 1 C5 100nF 0603 Any Ceramic Capacitor, 16V, X5R or X7R Ceramic Capacitor, 16V, X5R or X7R MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2023 MPS. All Rights Reserved. 40 MP2662 – 0.5A, 1-CELL CHARGER W/ I2C CONTROL, POWER PATH PACKAGE INFORMATION WLCSP (1.75mmX1.75mm) WLCSP-9 (1.75mmx1.75mm) PIN 1 ID MARKING PIN 1 ID INDEX AREA BOTTOM VIEW TOP VIEW SIDE VIEW NOTE: 1) ALL DIMENSIONS ARE IN MILLIMETERS. 2) BALL COPLANARITY SHALL BE 0.05 MILLIMETER MAX. 3) JEDEC REFERENCE IS MO-211. 4) DRAWING IS NOT TO SCALE. RECOMMENDED LAND PATTERN MP2662 Rev. 1.11 3/17/2023 MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2023 MPS. All Rights Reserved. 41 MP2662 – 0.5A, 1-CELL CHARGER W/ I2C CONTROL, POWER PATH REVISION HISTORY Revision # 1.0 Revision Date 1/31/2019 1.01 4/04/2019 1.02 1.1 1.11 5/18/2020 5/20/2021 3/17/2023 Description Initial Release Updated NTC pull up/low resistor value in Application section Added SERIES INTERFACE section to describes I2C Changing the VDD cap from 1uF to 100nF in the sections that mentioned VDD cap Changed “EV2662-C-00A” to EV2662-C-01A Updated the reset safety timer actions Removed “UVLO or input over-voltage protection” from the INT section Added CEB to the OTP map Added “Safety-Related Certification” to Features section Updated pin description Updated EVKT content: Change “USB dongle” to “communication interface” Updated I2C interface description Updated register format Improved the description of OPERATION Added note 9 Updated note numbers Updated notice in footnote Pages Updated - 3 20 21 32 1 5 3 23–24 7–32 17–24 30 31, 34 42 Notice: The information in this document is subject to change without notice. Please contact MPS for current specifications. Users should warrant and guarantee that third-party Intellectual Property rights are not infringed upon when integrating MPS products into any application. MPS will not assume any legal responsibility for any said applications. MP2662 Rev. 1.11 3/17/2023 MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2023 MPS. All Rights Reserved. 42