MAX8900BEWV+T Maxim Integrated Products, MAX8900BEWV+T Datasheet

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MAX8900BEWV+T

Manufacturer Part Number
MAX8900BEWV+T
Description
IC LI-ION/POLY BATT CHRGR 30WLP
Manufacturer
Maxim Integrated Products
Datasheet
1.MAX8900AEWVT.pdf (35 pages)

Specifications of MAX8900BEWV+T

Function
Battery Monitor
Battery Type
Lithium-Ion (Li-Ion), Lithium-Polymer (Li-Pol)
Voltage - Supply
3.4 V ~ 8.7 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
30-WLP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
19-5063; Rev 3; 1/11
The MAX8900_ is a high-frequency, switch-mode char-
ger for a 1-cell lithium ion (Li+) or lithium polymer
(Li-Poly) battery. It delivers up to 1.2A of current to the
battery from 3.4V to 6.3V (MAX8900A/MAX8900C) or
3.4V to 8.7V (MAX8900B). The 3.25MHz switch-mode
charger is ideally suited to small portable devices such
as headsets and ultra-portable media players because it
minimizes component size and heat.
Several features make the MAX8900_ perfect for high-
reliability systems. The MAX8900_ is protected against
input voltages as high as +22V and as low as -22V.
Battery protection features include low voltage prequali-
fication, charge fault timer, die temperature monitoring,
and battery temperature monitoring. The battery temper-
ature monitoring adjusts the charge current and termina-
tion voltage as described in the JEITA* specification for
safe use of secondary lithium-ion batteries.
Charge parameters are easily adjustable with external
components. An external resistance adjusts the charge
current from 50mA to 1200mA. Another external resis-
tance adjusts the prequalification and done current
thresholds from 10mA to 200mA. The done current thresh-
old is very accurate achieving Q1mA at the 10mA level.
The charge timer is adjustable with an external capacitor.
The MAX8900_ is available in a 0.4mm pitch, 2.44mm x
2.67mm x 0.64mm WLP package.
USB Charging
Headsets and Media
Players
Smartphones
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
Ordering Information continued at end of data sheet.
+Denotes a lead(Pb)-free/RoHS-compliant package.
T = Tape and reel.
Rating and JEITA Battery Temperature Monitoring
MAX8900AEWV+T
MAX8900BEWV+T
1.2A Switch-Mode Li+ Chargers with ±22V Input
PART
_______________________________________________________________ Maxim Integrated Products 1
-40NC to
-40NC to
RANGE
TEMP
+85NC
+85NC
Ordering Information
General Description
PIN-
PACKAGE
30 WLP
30 WLP
Digital Cameras
GPS, PND
eBook
Applications
V
T1 = 0NC
2-pin status indicators
V
V
T1 = -15NC
3-pin status indicators
V
OVLO
PQUTH
OVLO
PQUTH
OPTIONS
= 6.5V
= 9.0V
= 2.8V
= 2.8V
S 3.25MHz Switching Li+/Li-Poly Battery Charger
S JEITA Battery Temperature Monitor Adjusts
S 4.2V ±0.5% Battery Regulation Voltage (Alternate
S Adjustable Done Current Threshold
S High-Efficiency and Low Heat
S Uses a 2.0mm x 1.6mm Inductor
S Positive and Negative Input Voltage Protection
S Up to +20V Operating Range (Alternate OVLO
S Supports No-Battery Operation
S Fault Timer
S Charge Status Outputs
S 2.44mm x 2.67mm x 0.64mm Package
*JEITA (Japan Electronics and Information Technology
Industries Association) standard, “A Guide to the Safe Use
of Secondary Lithium Ion Batteries in Notebook-type Personal
Computers” April 20, 2007.
(-22V TO +22V)
Charge Current and Termination Voltage
4.1V Target Available on Request)
(±22V)
Ranges Available on Request)
OFF
1.0FF
0402
Adjustable from 10mA to 200mA
±1mA Accuracy at 10mA
6.3V
Simplified Applications Circuit
V
IN
0.47FF
ON
0603
25V
0.47FF
25V
0603
BST
LX
IN
STAT1
STAT2
STAT3
CEN
PVL
INBP
CT
MAX8900_
SETI
1FH
DNI
PGND
THM
GND
BAT
AVL
CS
Features
T
2.2FF
6.3V
0603
SYSTEM
Li-POLY
LOAD
Li+/

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MAX8900BEWV+T Summary of contents

Page 1

... PART RANGE PACKAGE -40NC to MAX8900AEWV+T 30 WLP +85NC -40NC to MAX8900BEWV+T 30 WLP +85NC +Denotes a lead(Pb)-free/RoHS-compliant package Tape and reel. Ordering Information continued at end of data sheet. _______________________________________________________________ Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. ...

Page 2

Switch-Mode Li+ Chargers with ±22V Input Rating and JEITA Battery Temperature Monitoring Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . ...

Page 3

Switch-Mode Li+ Chargers with ±22V Input Rating and JEITA Battery Temperature Monitoring TABLE OF CONTENTS (continued) Charge-Source Issues . . . . . . . . . . . . . . . . . . . . . ...

Page 4

Switch-Mode Li+ Chargers with ±22V Input Rating and JEITA Battery Temperature Monitoring ABSOLUTE MAXIMUM RATINGS IN to PGND .............................................................-22V to +22V INBP to PGND .......................................... ( INBP ..............................................................-30V to +1.2V STAT1, STAT2 to GND ..........................................-0.3V to +30V ...

Page 5

Switch-Mode Li+ Chargers with ±22V Input Rating and JEITA Battery Temperature Monitoring ELECTRICAL CHARACTERISTICS (continued 6V 4V 2.87kI BAT SETI noted. Typical values are +25NC.) (Note 2) A ...

Page 6

Switch-Mode Li+ Chargers with ±22V Input Rating and JEITA Battery Temperature Monitoring ELECTRICAL CHARACTERISTICS (continued 6V 4V 2.87kI BAT SETI noted. Typical values are +25NC.) (Note 2) A ...

Page 7

Switch-Mode Li+ Chargers with ±22V Input Rating and JEITA Battery Temperature Monitoring ELECTRICAL CHARACTERISTICS (continued 6V 4V 2.87kI BAT SETI noted. Typical values are +25NC.) (Note 2) A ...

Page 8

Switch-Mode Li+ Chargers with ±22V Input Rating and JEITA Battery Temperature Monitoring (Circuit of Figure 6V 3.6V BAT INPUT SUPPLY CURRENT vs. INPUT VOLTAGE (DISABLED 0V) BAT 120 V = ...

Page 9

Switch-Mode Li+ Chargers with ±22V Input Rating and JEITA Battery Temperature Monitoring (Circuit of Figure 6V 3.6V BAT SWITCHING FREQUENCY vs. INPUT VOLTAGE 5.0 4.5 4.0 3 3.0 BAT ...

Page 10

Switch-Mode Li+ Chargers with ±22V Input Rating and JEITA Battery Temperature Monitoring (Circuit of Figure 6V 3.6V BAT THM NORMAL TO COLD CURRENT FOLDBACK (T2) TO COLD SHUTOFF (T1) 60% OF AVL ...

Page 11

Switch-Mode Li+ Chargers with ±22V Input Rating and JEITA Battery Temperature Monitoring (Circuit of Figure 6V 3.6V BAT EFFICIENCY vs. INPUT VOLTAGE (CONSTANT-CURRENT MODE 1200mA 2.87k I ...

Page 12

Switch-Mode Li+ Chargers with ±22V Input Rating and JEITA Battery Temperature Monitoring (Circuit of Figure 6V 3.6V BAT 5V IN CONNECT BAT R 400µs/div BATTERY DISCONNECT 6V ...

Page 13

Switch-Mode Li+ Chargers with ±22V Input Rating and JEITA Battery Temperature Monitoring PIN NAME Connection to Battery. Connect to a single-cell Li+/Li-Poly battery from BAT to PGND. Connect both A1, B1 BAT BAT pins together externally. Bypass BAT to ...

Page 14

Switch-Mode Li+ Chargers with ±22V Input Rating and JEITA Battery Temperature Monitoring PIN NAME Power Input Bypass. Connect all INBP pins together externally. Bypass INBP to PGND with a 0.47FF C3–C6 INBP ceramic capacitor. Status Output 1. STAT1 is ...

Page 15

Switch-Mode Li+ Chargers with ±22V Input Rating and JEITA Battery Temperature Monitoring 0.1FF V RANGE: IN 10V -22V TO +22V 0402 IN BAT 422I 422I * * * OFF 0.47FF 1.0FF 25V 6.3V 0603 0402 * STATUS INDICATORS ARE ...

Page 16

Switch-Mode Li+ Chargers with ±22V Input Rating and JEITA Battery Temperature Monitoring STAT1 30V STAT2 30V STAT3 GND: E6 CT: E3 CHARGER TIMER CEN CEN PVL: A6 ...

Page 17

Switch-Mode Li+ Chargers with ±22V Input Rating and JEITA Battery Temperature Monitoring Detailed Description The MAX8900_ is a full-featured, high-frequency switch- mode charger for a 1-cell Li+ or Li-Poly battery. It delivers up to 1.2A to the battery from ...

Page 18

Switch-Mode Li+ Chargers with ±22V Input Rating and JEITA Battery Temperature Monitoring Setting the Prequalification Current and Done Threshold (DNI) As shown in Figure 5, a resistor from DNI to ground (R ) sets the prequalification current (I DNI ...

Page 19

Switch-Mode Li+ Chargers with ±22V Input Rating and JEITA Battery Temperature Monitoring to enable the MAX8900_. CEN has an internal 200kI pulldown resistor. When disabled, the MAX8900_ supply current is reduced, the step-down converter high-side and low-side switches are ...

Page 20

Switch-Mode Li+ Chargers with ±22V Input Rating and JEITA Battery Temperature Monitoring V TOO HIGH IN STAT1 = LOW STAT2 = LOW STAT3 = HI BAT V < OVLO TIMER = RESUME ANY CHARGING ...

Page 21

Switch-Mode Li+ Chargers with ±22V Input Rating and JEITA Battery Temperature Monitoring V TOO HIGH IN STAT1 = HI-Z STAT2 = LOW BAT V < OVLO TIMER = RESUME ANY CHARGING STATE (DEAD BAT, ...

Page 22

Switch-Mode Li+ Chargers with ±22V Input Rating and JEITA Battery Temperature Monitoring Charger Disabled State When CEN is high or the input voltage is out of range, the MAX8900_ disables the charger. To exit this state, CEN must be ...

Page 23

Switch-Mode Li+ Chargers with ±22V Input Rating and JEITA Battery Temperature Monitoring The MAX8900_ enters its done state after the charger has been in the top-off state for t switching charger is off and no current is delivered to ...

Page 24

Switch-Mode Li+ Chargers with ±22V Input Rating and JEITA Battery Temperature Monitoring Table 1. 2.44mm x 2.67mm x 0.64mm, 0.4mm Pitch WLP Thermal Characteristics FOUR-LAYER PCB (JESD51-9:2s2p) 1619mW Continuous Power Derate 20.2mW/NC above Dissipation +70NC/W 49.4NC 9NC/W ...

Page 25

Switch-Mode Li+ Chargers with ±22V Input Rating and JEITA Battery Temperature Monitoring Table 2. Trip Temperatures for Different Thermistors THERMISTOR +25NC THRM A Thermistor Beta (ß[I]) RTB (I) RTP (I) RTS (I) Resistance at T1_n15 ...

Page 26

Switch-Mode Li+ Chargers with ±22V Input Rating and JEITA Battery Temperature Monitoring A. BASIC THERMISTOR CONFIGURATION AVL: E5 AVL AVL IS THE INTERNAL R TB ANALOG SUPPLY THM THRM COLD: T1 COOL: T2 WARM: T3 HOT: ...

Page 27

Switch-Mode Li+ Chargers with ±22V Input Rating and JEITA Battery Temperature Monitoring PVL and AVL Regulator PVL linear regulator that the MAX8900_ uses to power the gate drivers for its step-down charger. PVL also charges the ...

Page 28

Switch-Mode Li+ Chargers with ±22V Input Rating and JEITA Battery Temperature Monitoring Inductor Selection Consider inductance, current rating, series resistance, physical size, and cost when selecting an inductor. These factors affect the converter’s efficiency, maximum output current, transient response ...

Page 29

Switch-Mode Li+ Chargers with ±22V Input Rating and JEITA Battery Temperature Monitoring If the input voltage approaches the BAT voltage during fast-charge constant current state, the maximum current is no longer limited by the current loop, but by the ...

Page 30

Switch-Mode Li+ Chargers with ±22V Input Rating and JEITA Battery Temperature Monitoring capacitor ( 0.1FF with a voltage rating of 10V or BST greater increased then maintain a ratio of less BST than ...

Page 31

Switch-Mode Li+ Chargers with ±22V Input Rating and JEITA Battery Temperature Monitoring impedance), the voltage spike could be twice that of the nominal source voltage. In other words source with a high-Q LC tank circuit in the ...

Page 32

Switch-Mode Li+ Chargers with ±22V Input Rating and JEITA Battery Temperature Monitoring The guidelines at the top are the most critical: 1) When the step-down converter’s high-side MOSFET turns on, C delivers a high di/dt current pulse to INBP ...

Page 33

Switch-Mode Li+ Chargers with ±22V Input Rating and JEITA Battery Temperature Monitoring TOP VIEW SCALE DRAWING 5x6 BUMP ARRAY (30 BUMPS Figure ...

Page 34

Switch-Mode Li+ Chargers with ±22V Input Rating and JEITA Battery Temperature Monitoring For the latest package outline information and land patterns www.maxim-ic.com/packages. Note that a “+”, “#”, or “-” in the package code indicates RoHS status only. ...

Page 35

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 2011 Maxim Integrated Products © ...

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