NOT RECOMMENDED FOR NEW DESIGN
APM8600
Green
SINGLE CELL LINEAR LITHIUM BATTERY CHARGER
WITH 28V OVP AND PROGRAMMABLE CHARGE TIMER
Description
Pin Assignments
BAT
The APM8600 is a linear Li-Ion charger for portable
equipment that is optimized for small form-factor
applications.
The charge algorithm in the APM8600 covers all the charge
requirements for a single Li-Ion battery cell. Included is precharging for deeply discharged cells, constant current /
constant voltage fast charging and a top-off feature to bring
the cell safely to a full-charge level.
The battery is constantly monitored for overvoltage, charge
time and cell temperature to ensure safe charging. A fault is
triggered once the charge time exceeds a value that is
programmable using a single capacitor and the temperature
measurement is achieved through a thermistor positioned
close to the battery cell.
The APM8600 is packaged in U-DFN3030-14 package with
a thermal pad.
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)
1
14 FLT
SETI 2
13 DC
THM
3
12 DC
GND
4
CT
5
10 POK
DNC
6
9
NC
NC
7
8
EN
APM8600
11 CHG
Figure 1 Pin Out
Applications
•
•
•
•
•
Handheld Consumer Devices
Cell Phones, PDAs, MP3 Players
Handheld Test Equipment
Digital Still Cameras
Multimedia Players
Halogen and Antimony Free. “Green” Device (Note 3)
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 definitions of Halogen- and Antimony-free, "Green"
and Lead-free.
3. Halogen- and Antimony-free "Green” products are defined as those which contain 3.94kΩ
AND RTHM < 28.3kΩ)
CHG
CHG
0A
POK 0
IBAT
1
0A
FLT
1 CHG
150 / RSETI
1
VBAT < 3V
AND Time out
(RTHM > 315Ω
AND RTHM < 3.94kΩ)
OR RTHM > 28.3kΩ
FAULT
VBAT < 2.82V
Reset Timer
VBAT > 3V
Reset Timer
RTHM < 315Ω
OR (RTHM > 3.94kΩ
AND RTHM < 28.3kΩ)
CHARGE
THM
POK
0
FLT
CHG
0
IBAT
Timer Hold
POK 0
IBAT (DC)
1
0A
0
FLT
0
CHG
1
IBAT
0A
0
IBAT < 112.5 / RSETI
Reset Timer
VBAT < 4.05V
Reset Timer
TOP-OFF
POK
0
IBAT > 112.5 / RSETI
AND Time out
FLT 1 CHG
1500 / RSETI
(RTHM > 315Ω
AND RTHM < 3.94kΩ)
OR RTHM > 28.3kΩ
IBAT > 172.5 / RSETI
Reset Timer
POK
FLT
1
CHG
1
Time out
DONE
POK 0
IBAT
APM8600
Document number: DS35140 Rev. 2 - 3
FLT
1
CHG
0A
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© Diodes Incorporated
NOT RECOMMENDED FOR NEW DESIGN
APM8600
Functional Description (Cont.)
INPUTS
DC
Pins 12 and 13 are the DC input. This input will allow charging from input 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 normally. 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.
RSETI
1500
ICHARGE
The charge current setting also changes the currents in prequal and top-off modes (being 10% and 7.5% of ICHARGE
respectively):
IPREQUAL
150
RSETI
ITOPOFF
112.5
RSETI
This pin can also be used to monitor the battery charging current:
ICHARGE
VSETI 1000
RSETI
0
315Ω
Enabled
3.94k
APM8600
Document number: DS35140 Rev. 2 - 3
RTHM
Disabled
Enabled
Disabled
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
disabled when there is between 315Ω and 3.94kΩ; enabled when between 3.94kΩ and 28.3kΩ; and disabled above 28.3kΩ.
28.3k
Thermistor
Beta
3000
3250
3500
3750
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Resistance in kΩ at
0°C
25°C 50°C
25.1
10
4.6
27.1
10
4.3
29.3
10
4
31.7
10
3.8
Typical in °C
Hot trip Cold Trip
55.1
-3.2
52.6
-1.3
50.5
0.5
48.6
2.0
May 2016
© Diodes Incorporated
NOT RECOMMENDED FOR NEW DESIGN
APM8600
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, C CT:
CCT
TCHARGE 334 min
68nF
CCT
TPREQUAL TTOPOFF 34.8min
68nF
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 2.2µF 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.
APM8600
Document number: DS35140 Rev. 2 - 3
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NOT RECOMMENDED FOR NEW DESIGN
APM8600
Functional Description (Cont.)
EN
CHG
4.2V
3V
VBAT
0V
DONE
TOP-OFF
CHARGE
DISABLE
IBAT
PREQUAL
ICHARGE
1500/RSETI
IPREQUAL
150/RSETI
0A
ITOPOFF
112.5/RSETI
t
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 will 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 battery 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 the Fault
state, indicating that the battery cell may be damaged 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 CT 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.
APM8600
Document number: DS35140 Rev. 2 - 3
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© Diodes Incorporated
NOT RECOMMENDED FOR NEW DESIGN
APM8600
Ordering Information
APM8600 FB - 7
Device
APM8600FB-7
Note:
Package
Code
FB
Package
Packing
FB :U-DFN3030-14
7 : Tape & Reel
7” Tape and Reel
Quantity
Part Number Suffix
3000/Tape & Reel
-7
Packaging
(Note 8)
U-DFN3030-14
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
( Top View )
XX
Y WX
XX : P4 : APM8600
Y : Year : 0~9
W : Week : A~Z : 1~26 week;
a~z : 27~52 week;
z : represents 52 and 53
X : A~Z : Internal Code
Part Number
Package
Identification Code
APM8600FB-7
U-DFN3030-14
P3
APM8600
Document number: DS35140 Rev. 2 - 3
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NOT RECOMMENDED FOR NEW DESIGN
APM8600
Package Outline Dimensions (All Dimensions in mm)
U-DFN3030-14
0.15
TOP MARK
0.10 C
0.08 C
C
2.95/3.05
2.2/2.4
B
14x-0.50
0.25 A
0/0.05
Side View
2X-
0.57/0.63
Seating Plane
A
Top View
0.40Typ
14x-0.25
CL
2X-
C0
0.25 B
0.40Typ.
CL
CL
0.15/0.25
(Pin #1 ID)
0.10
Bottom View
APM8600
Document number: DS35140 Rev. 2 - 3
CL
2.65
1.80
.3
0.30/0.40
1.6/1.8
2.95/3.05
(Pin #1 ID)
C A B
2.40
Land Pattern Recommendation
(Unit:mm)
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NOT RECOMMENDED FOR NEW DESIGN
APM8600
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
APM8600
Document number: DS35140 Rev. 2 - 3
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NOT RECOMMENDED FOR NEW DESIGN
APM8600
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, corrections or other changes
without further notice to this document and any product described herein. Diodes Incorporated does not assume any liability arising 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 applications shall assume
all risks of such use and will agree to hold Diodes Incorporated 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 Incorporated 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 English 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 in 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
APM8600
Document number: DS35140 Rev. 2 - 3
15 of 15
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© Diodes Incorporated
