APM8600

Document overview

  • Manufacturer or author: Diodes Incorporated
  • PDF pages: 15

Technical content

Features

  • Linear Lithium Ion / Lithium Polymer Charging IC
  • Supply Input Safe up to 28V
  • Fast Charging with Maximum Current of 1A
  • Resistor-Programmable Charging Current
  • Resistor -Programmable End-Of-Charge
  • Capacitor Programmable Charge Timer
  • Three Charge Indicator Pins for a Status Display
  • Thermal Protection
  • U-DFN3030-14: Available in “Green” Molding Compound (No Br, Sb)
  • Lead-Free Finish; RoHS Compliant (Notes 1 & 2)
  • Halogen and Antimony Free. “Green” Device (Note 3) Pin Assignments BAT SETI THM GND CT DNC FLT DC DC CHG POK NC APM8600 7 8NC EN Figure 1 Pin Out

Applications

  • Handheld Consumer Devices
  • Cell Phones, PDAs, MP3 Players
  • Handheld Test Equipment
  • Digital Still Cameras
  • Multimedia Players Notes: 1. EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant. All applicable RoHS exemptions applied. 2. See http://www.diodes.com/quality/lead_free.html for more information about Diodes Incorporated’s defini tions of Halogen- and Antimony-free, "Green" and Lead-free. 3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and <1000ppm antimony compounds. Green

Figure 2. Typical Application Circuit

Document number: DS35140 Rev. 2 - 3 3 of 15 www.diodes.com May 2016 © Diodes Incorporated APM8600 NOT RECOMMENDED FOR NEW DESIGN Name Pin # Description BAT 1, 7 Connection to the Battery The battery is charged via this pin and the BAT voltage is constantly monitored. Connect a bypass capacitor between BAT and GND (2.2µ F). SETI 2 Charge Current programming The maximum charge current is progr ammed using a resistor from SETI to GND. This also determines the prequal current charging level and top-off threshold. THM 3 Thermistor Input To monitor the battery temperature, connect a 10kΩ NTC thermistor. Place this thermistor as close as possible to the battery. Connect THM to GND if temperature measurement is not required. GND 4 Ground Ground connection. CT 5 Charge Timing Connecting a c apacitor from CT to GND will set the time -outs for prequal, top -off and fast-charge. Connecting CT direct to GND disables these timers. EN

8 Enable

(Active-low) The charger is enabled when this input is low. To start the charger conn ect EN to GND. Drive this input high to disable the charger. POK

10 Power OK

(Active -low) When a valid input source is connected, this open-drain output is pulled low. CHG

11 Charge Status

(Active -low) Open-drain output that indicates the charging status. It is active only in the fast - charge state and goes high -impedance when the charger is either disabled or in prequal or top-off mode. DC 12, 13 DC Input DC supply input. The re commended input voltage is between 4.32V and 7V. This input is capable of withstanding up to 28V. Connect both DC pins together on the PCB. It is recommended to connect a bypass capacitor (1µF) from DC to GND. FLT

14 Fault Flag

(Active -low) If the prequal or fast -charge timers expire and the charging threshold voltage is not reached, FLT (open-drain output) will go low. Remove the fault by cycling power or raise EN . EP Exposed Pad For optimal thermal performance connect to copper on PCB (electrically this can be GND). NC 7,9 Not Connected Floating pins NC 6 Do Not Connect Must not connect

Document number: DS35140 Rev. 2 - 3 4 of 15 www.diodes.com May 2016 © Diodes Incorporated APM8600 NOT RECOMMENDED FOR NEW DESIGN Functional Block Diagram CHARGER REGULATOR BATDC THERMAL CURRENT FOLDBACK PROTECTION CHARGE CONTROL CHARGE CONDITION COMPARATORS3.0V 4.2V SETI 1.5V REFERENCE EN GND CHG POR FLT TIMERCT THM OVLO UVLO VDROP PREQUAL

Document number: DS35140 Rev. 2 - 3 5 of 15 www.diodes.com May 2016 © Diodes Incorporated APM8600 NOT RECOMMENDED FOR NEW DESIGN Absolute Maximum Ratings Symbol Parameter Rating Unit – DC to GND -0.3 to 28V V – BAT, CT, SETI, THM, FLT , CHG , POK , EN to GND -0.3 to 6V V ESD Susceptibility (Note 4) HBM Human Body Model 2 kV MM Machine Model 200 V Note: 4. Semiconductor devices are ESD sensitive and may be damaged by exposure to ESD events. Suitable ESD precautions should be taken when handling and transporting this device. Thermal Resistance (Note 5) Symbol Parameter Rating Unit θJA Junction to Ambient 40 ° C/W Note: 5. Test condition for DFN3030-10: Device mounted on FR-4 2-layer board, 2oz copper, with minimum recommended pad on top layer and 6 vias to bottom layer 1.0”x1.5” ground plane. Recommended Operating Conditions (Note 6) Symbol Parameter Rating Unit – Ambient Temperature Range -40 to +85 °C – Input Supply Voltage 4.15 to 7.00 V ICHARGE Typical Charge Current 0.1 to 1.0 A Note: 6. The device function is not guaranteed outside of the recommended operating conditions.

Document number: DS35140 Rev. 2 - 3 6 of 15 www.diodes.com May 2016 © Diodes Incorporated APM8600 NOT RECOMMENDED FOR NEW DESIGN

Electrical Characteristics

APM8600 is tested at V DC = 5V, VBAT = 4V, V EN = 0V, R SETI = 2kΩ, C CT = 68nF, at an ambient temperature of +25° C unless otherwise noted. Note: 7. Guaranteed by testing of undervoltage- and overvoltage-threshold. To completely charge a battery cell, the input voltage must be greater than 4.32V. Symbol Parameter Test Conditions Min Typ. Max Unit VDC Input Voltage Range – 0 – 28 V VDC Input Operating Range (Note 7) – 4.15 – 7.00 V UVLO Input Undervoltage Lock Out (Note 7) Input rising, 500mV hysteresis OVLO Input Overvoltage Lock Out Input rising, 200mV hysteresis IDC Input Supply Current IBAT = 0mA, RTHM = 10kΩ – 750 1200 µA ISHTDWN Shutdown Current EN = High, TA = +25º C – 275 435 µA RDS_ON Input to BAT On-Resistance Input = 3.7V, VBAT = 3.6V – 0.5 0.8 Ω VDROPOUT Input to BAT dropout Voltage Input falling, 200mV hysteresis (typ.) 5 55 150 mV VBAT_REG Battery Voltage Regulation IBAT = 0mA, TA = +25º C 4.179 4.2 4.221 V BATRSTTH Battery Fast-Charge Restart Threshold From BAT regulation voltage -230 -175 -110 mV IDC_CHG DC Charge Current VUSB = 0V RSETI = 1.5kΩ 950 1000 1140 mA RSETI = 2.0kΩ 727 750 870 RSETI = 5.0kΩ 280 300 353 Prequal, RSETI = 2kΩ, VBAT = 2.5V 60 75 95 SS Soft-Start Time Ramp time to fast-charge – 1.2 – ms VPREQ_TH BAT Prequel Threshold VBAT rising, 180mV hysteresis ILEAK BAT Leakage Current VDC = VUSB = 0V, VBAT = 4.2V – 0.001 5 µA RSETI Resistance Range for SETI Guaranteed by charging current 1.5 – 5.0 kΩ

Document number: DS35140 Rev. 2 - 3 7 of 15 www.diodes.com May 2016 © Diodes Incorporated APM8600 NOT RECOMMENDED FOR NEW DESIGN Electrical Characteristics (Cont.) APM8600 is tested at VDC = 5V, VBAT = 4V, V EN = 0V, R SETI = 2kΩ, C CT = 68nF, at an ambient temperature of +25° C unless otherwise noted. Symbol Parameter Test Conditions Min Typ. Max Unit EN Logic Input Thresholds Rising – – 1.6 V Falling 0.4 – – Logic Input Leakage Current ENV = 0 to 5.5V, TA = 25º C – 0.001 1 µA POK CHG , FLT Logic Output Voltage, Low 1mAIII F LTCHGPOK  – 12 100 mV Logic Output Leakage Current, High 5.5VVVV F LTCHGPOK  VDC = VUSB = 0V TA = +25° C – 0.001 1 µA ITOPOFF CHG / Top-Off Threshold IBAT falling, battery is charged RSETI = 1.5kΩ – 75 – mA RSETI = 2.0kΩ 37.5 56.25 75 RSETI = 5.0kΩ – 22.5 – RTHM_Pullup Internal Pullup Resistance – – 10 – kΩ RTHM THM Resistance, Hot RTHM falling, 420Ω hyst. (typ.) 3.72 3.94 4.13 kΩ THM Resistance, Cold RTHM rising, 2.7kΩ hyst. (typ.) 26.7 28.3 29.7 kΩ THM Resistance, Disabled RTHM falling, 230Ω hyst. (typ.) 260 315 370 Ω CTaccu Charge Timer Accuracy CCT = 68nF -20 – +20 % TLPrequal Prequal Time Limit From entering prequal to FLT going low, VBAT < 3V 34.8 min TLCHG Charge Time Limit From entering fast-charge to FLT going low, 3V < VBAT < 4.2V 334 min TLTop_off Top-Off Time Limit From CHG going high to charger disabled 34.8 min THFBtemp Thermal Foldback Threshold Temperature Junction temperature beyond which the charge current is reduced, TJ rising +100 ºC THFBGain Thermal Foldback Gain Reduction of IBAT for increase in TJ (using VDC), RSETI = 1.5kΩ 5 %/º C

Document number: DS35140 Rev. 2 - 3 8 of 15 www.diodes.com May 2016 © Diodes Incorporated APM8600 NOT RECOMMENDED FOR NEW DESIGN Functional Description APM8600 is a linear Li -Ion battery charger device for single -cell applications. Charge currents can be programmed with the RSETI resistor. The device also incorporates several safety features, such as charg e timers, battery temperature monitoring and internal thermal limiting. Functional State Diagram ANY STATE EN = HIGH OR VIN < VBAT OR VIN < 4.0V OR VIN > 7.5V EN = LOW AND VIN > VBAT AND VIN > 4.0V AND VIN < 7.5V VBAT > 3V Reset Timer VBAT < 2.82V Reset Timer IBAT < 112.5 / RSETI Reset Timer IBAT > 172.5 / RSETI Reset Timer RTHM < 315Ω OR (RTHM > 3.94kΩ AND RTHM < 28.3kΩ) (RTHM > 315Ω AND RTHM < 3.94kΩ) OR RTHM > 28.3kΩ RTHM < 315Ω OR (RTHM > 3.94kΩ AND RTHM < 28.3kΩ) (RTHM > 315Ω AND RTHM < 3.94kΩ) OR RTHM > 28.3kΩ Time out VBAT < 4.05V Reset Timer IBAT > 112.5 / RSETI AND Time out VBAT < 3V AND Time out DISABLE POK 1 FLT 1 CHG 1 IBAT 0A PREQUAL POK 0 FLT 1 CHG 1 IBAT 150 / RSETI Timer Hold THM POK 0 FLT 1 CHG 1 IBAT 0A TOP-OFF POK 0 FLT 1 CHG 1 CHARGE POK 0 FLT 1 CHG 0 IBAT (DC) 1500 / RSETI DONE POK 0 FLT 1 CHG 1 IBAT 0A Timer Hold THM POK 0 FLT 1 CHG 0 IBAT 0A FAULT POK 0 FLT 0 CHG 1 IBAT 0A

Document number: DS35140 Rev. 2 - 3 9 of 15 www.diodes.com May 2016 © Diodes Incorporated APM8600 NOT RECOMMENDED FOR NEW DESIGN Functional Description (Cont.) INPUTS DC Pins 12 and 13 are the DC input. This input will allow charging from i nput voltages between 4.15V and 7V, and can withstand up to 28V without device damage although charging is disabled above 7.5V (typ.). GND System ground connection. EN Pin 8 is the enable pin of the device. When pulled low the device will operate norm ally. When high, the device will remain in the disabled state. For auto-starting, connect pin 8 directly to GND. SETI Pin 2 allows the charge currents to be programmed. ICHARGE 1500RSETI  The charge current setting also changes the currents in p requal and top -off modes (being 10% and 7.5% of I CHARGE respectively): RSETI 150IPREQUAL  RSETI 112.5ITOPOFF  This pin can also be used to monitor the battery charging current: RSETI 1000VSETIICHARGE  THM The thermistor connection is on pin 3. This allows the battery temperature to be monitored using a 10k NTC thermistor, which should be placed as close as possible to the battery cell. If no thermistor is used then this input should be connected directly to ground. The charger will operate when there is less than 315Ω on this input (i.e., no thermistor connected); will be 0° C 25°C 50° C Hot trip Cold Trip 3000 25.1 10 4.6 55.1 -3.2 3250 27.1 10 4.3 52.6 -1.3 3500 29.3 10 4 50.5 0.5 3750 31.7 10 3.8 48.6 2.0 Resistance in kΩ at Typical in °CThermistor Beta Disabled Enabled Enabled Disabled 0 315Ω 3.94k 28.3k RTHM

Document number: DS35140 Rev. 2 - 3 10 of 15 www.diodes.com May 2016 © Diodes Incorporated APM8600 NOT RECOMMENDED FOR NEW DESIGN Functional Description (Cont.) CT The Charge Timer input on pin 5 allows selection of how long the system timers for Prequal, Charge and Top -off states last. They are set by selecting the value of capacitor, CCT:  nF68 CCTmin334TCHARGE  nF68 CCTmin34.8TTOPOFFTPREQUAL The charge timer will hold its current value if the charging was stopped via the thermistor and continue when the battery is in a valid temperature range for charging. OUTPUTS BAT Pin 1 is the current-controlled charging output for the battery cell. It should be connected to the positive terminal of the battery. The chip monitors the voltage on this pin. There should be a 2.2µ F capacitor connected from BAT to GND. POK The POK flag on pin 10 is pulled low when a valid power input is available on DC. It will go high when no valid power is available and the device will enter the Disable state. CHG The CHG flag at pin 11 is pulled low when the device is in the Charge state. It will be high in Prequal and Top -off states. If the thermistor trips the circuit into the THM state (from Prequal or Charge states), CHG will hold its previous value. FLT The FLT flag on pin 14 indicates a battery fault, as determined by a time -out in either the Prequal or Charge states. If the battery voltage does not reach 3V after the prequal timer (default 34.8mins), or does not reduce charging current to 7.5% after the charge timer (default 334mins), this indicates that the battery has failed or is failing and this will trigger the FLT flag. This flag will not automatically reset, and can only be cleared by cycling the power input or the EN pin.

Document number: DS35140 Rev. 2 - 3 11 of 15 www.diodes.com May 2016 © Diodes Incorporated APM8600 NOT RECOMMENDED FOR NEW DESIGN Functional Description (Cont.) CHARGING PROCESS DESCRIPTION The charging process is as follows, working through the state diagram. The device will begin in the Disable state as the input power supply ramps from 0V. Once the input power supply has got into the valid range (4.15V – 7V), and the device is enabled then it wi ll enter the Prequal state. This state allows for slow charging of a severely discharged battery. If the battery is already partially charged then the condition to move into the Charge state is met. If it is not then the slow charge will increase the batte ry voltage until it can enter the Charge state, or if the voltage does not rise sufficiently before the charge timer runs out (set using the capacitor on the CT pin) then the device will go into t he Fault state, indicating that the battery cell may be dama ged or has failed and is not taking charge. In the Prequal state the battery temperature can be monitored with a 10k NTC thermistor connected to the THM pin, and if the battery temperature goes out of range (above ~50° C or below ~0° C, depending on thermistor choice) then charging will be suspended with the device going into the THM state. Once the battery has charged to a level of 3V, the device enters the Charge state, allowing faster charging of the battery in its normal voltage range, with 10 times the current used in the Prequal state. For information on setting the charge currents, see the functional description of the SETI pin. Again, the battery temperature is monitored and charging will be suspended if the temperature goes out of range. The Charge state will last until the current drawn by the battery drops to 7.5% of the full charge current. The device will then enter the Top-Off state, maintaining battery voltage and providing top -off charging current for the time defined by the C T value. Once that timer completes, the device will enter the Done state, with zero battery current. If the battery voltage falls below 4.05V then the device will automatically return to the Charge state. DONE TOP-OFF CHARGE PREQUAL DISABLE EN CHG VBAT IBAT t IPREQUAL 150/RSETI ICHARGE 1500/RSETI 4.2V ITOPOFF 112.5/RSETI

Document number: DS35140 Rev. 2 - 3 12 of 15 www.diodes.com May 2016 © Diodes Incorporated APM8600 NOT RECOMMENDED FOR NEW DESIGN

Ordering Information

FB :U-DFN3030-14 7 : Tape & Reel Device Package Code Packaging (Note 8) 7” Tape and Reel Quantity Part Number Suffix APM8600FB-7 FB U-DFN3030-14 3000/Tape & Reel -7 Note: 8. Pad layout as shown on Diodes Inc. suggested pad layout document , which can be found on our website at http://www.diodes.com/package-outlines.html. Marking Information Y : Year : 0~9 W : Week : A~Z : 1~26 week; ( Top View ) X : A~Z : Internal Code Y W X XX XX : P4 : APM8600 z : represents 52 and 53 a~z : 27~52 week; Part Number Package Identification Code APM8600FB-7 U-DFN3030-14 P3

Document number: DS35140 Rev. 2 - 3 13 of 15 www.diodes.com May 2016 © Diodes Incorporated APM8600 NOT RECOMMENDED FOR NEW DESIGN Package Outline Dimensions (All Dimensions in mm) U-DFN3030-14 Bottom View Side View 0.10 C

0.08 C Seating Plane

C 2.95/3.05 2.2/2.4 2.95/3.05 1.6/1.8 (Pin #1 ID) AB

0.10 C A B

0.25 A 2X- 0.25 B 2X- TOP MARK Land Pattern Recommendation (Unit:mm) 14x-0.251.80 2.40 0.30/0.40 C0.3 0.15 0/0.05 0.57/0.63 0.40Typ Top View 0.15/0.250.40Typ. CL CL CL CL (Pin #1 ID) 2.65 14x-0.50

Document number: DS35140 Rev. 2 - 3 14 of 15 www.diodes.com May 2016 © Diodes Incorporated APM8600 NOT RECOMMENDED FOR NEW DESIGN Taping Orientation (Note 9) Note: 9. The taping orientation of the other package type can be found on our website at http://www.diodes.com/datasheets/ap02007.pdf

Document number: DS35140 Rev. 2 - 3 15 of 15 www.diodes.com May 2016 © Diodes Incorporated APM8600 NOT RECOMMENDED FOR NEW DESIGN IMPORTANT NOTICE DIODES INCORPORATED MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS TO THIS DOCUMENT, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION). Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corr ections or other changes without further notice to this document and any product described herein. Diodes Incorporated does not assume any liability a rising out of the application or use of this document or any product described herein; neither does Diodes Incorporated convey any license under its patent or trademark rights, nor the rights of others. Any Customer or user of this document or products described herein in such appli cations shall assume all risks of such use and will agree to hold Diodes Incor porated and all the companies whose products are represented on Diodes Incorporated website, harmless against all damages. Diodes Incorporated does not warrant or accept any liability whatsoever in respect of any products purchased through unauthorized sales channel. Should Customers purchase or use Diodes Incorporated products for any unintended or unauthorized application, Customers shall indemnify and hold Diodes Incorpo rated and its representatives harmless against all claims, damages, expenses, and attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized application. Products described herein may be covered by one or more United States, international or foreign patents pending. Product names and markings noted herein may also be covered by one or more United States, international or foreign trademarks. This document is written in Englis h but may be translated into multiple languages for reference. Only the English version of this document is the final and determinative format released by Diodes Incorporated. LIFE SUPPORT Diodes Incorporated products are specifically not authorized for use as critical components in life support devices or systems without the express written approval of the Chief Executive Officer of Diodes Incorporated. As used herein: A. Life support devices or systems are devices or systems which: 1. are intended to implant into the body, or 2. support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided i n the labeling can be reasonably expected to result in significant injury to the user. B. A critical component is any component in a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or to affect its safety or effectiveness. Customers represent that they have all necessary expertise in the safety and regulatory ramifications of their life support devices or systems, and acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements concerning their products and any use of Diodes Incorporated products in such safety -critical, life support devices or systems, notwithstanding any devices - or systems -related information or support that may be provided by Diodes Incorporated. Further, Customers must fully indemnify Diodes Incorporated and its representatives against any damages arising out of the use of Diodes Incorporated products in such safety-critical, life support devices or systems. Copyright © 2016, Diodes Incorporated www.diodes.com