MAX8934BETI+ Maxim Integrated Products, MAX8934BETI+ Datasheet

MAX8934BETI+

Manufacturer Part Number

MAX8934BETI+

Description

IC BATTERY CHARGER DUAL 28TQFN

Manufacturer

Maxim Integrated Products

Series

Smart Power Selector™r

Datasheet

1.MAX8934AETIT.pdf (31 pages)

Specifications of MAX8934BETI+

Function

Charge Management

Battery Type

Lithium-Ion (Li-Ion), Lithium-Polymer (Li-Pol)

Voltage - Supply

4.1 V ~ 6.6 V

Operating Temperature

-40°C ~ 85°C

Mounting Type

Surface Mount

Package / Case

28-TQFN Exposed Pad

Product

Charge Management

Output Voltage

1 V

Operating Supply Voltage

4.1 V to 6.6 V

Supply Current

1 mA

Maximum Operating Temperature

+ 85 C

Minimum Operating Temperature

- 40 C

Charge Safety Timers

Yes

Mounting Style

SMD/SMT

Temperature Monitoring

Yes

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Current page: 1 of 31
Download datasheet (3Mb)

19-4995; Rev 2; 6/10

Dual-Input Linear Chargers, Smart Power Selector

The MAX8934_ dual-input Li+/Li-Poly linear battery char-

gers with Smart Power SelectorK safely charge a single

Li+/Li-Poly cell in accordance with JEITA recommenda-

tions. The MAX8934_ monitors the battery temperature

fast-charge current and charge termination voltage as the

battery temperature varies. The MAX8934_ also monitors

the battery temperature while the battery is discharging,

and provides a warning flag (OT) to the system in the

event that the battery is over temperature. Two safety pro-

files are supported (see Figure 6 for details). An ultra-low

system power.

The MAX8934_ operates with either separate inputs

for USB and AC adapter power*, or from a single input

that accepts both. All power switches for charging and

switching the load between battery and external power

are included on-chip. No external MOSFETs are required.

The MAX8934_ features a Smart Power Selector to make

the best use of limited USB or adapter power. Input cur-

rent limit and battery charge current limit are indepen-

dently set. Input power not used by the system charges

the battery. Charge current limit and DC current limit can

be set up to 1.5A and 2A, respectively, while USB input

current can be set to 100mA or 500mA for the MAX8934A/

MAX8934B/MAX8934C/MAX8934E and up to 1.5A (max)

for the MAX8934D. Automatic input selection switches the

system load from battery to external power.

The MAX8934A provides a SYS output voltage of 5.3V,

while the MAX8934B–MAX8934E provides a SYS output

voltage of 4.35V.

Other features include overvoltage protection (OVP),

open-drain charge status and fault outputs, power-OK

monitors, charge timers, and a battery thermistor moni-

tor. Additionally, on-chip thermal limiting reduces the

battery charge-rate to prevent charger overheating.

The MAX8934_ is available in a 28-pin, 4mm x 4mm,

TQFN package.

Smart Power Selector is a trademark of Maxim Integrated

Products, Inc.

*Protected by U.S. Patent #6,507,172.

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.

BATT

, always-on LDO provides an additional 3.3V supply for

with Advanced Battery Temperature Monitoring

) while charging, and automatically adjusts the

PDAs, Palmtop, and Wireless Handhelds

Portable Media, MP3 Players, and PNDs

Digital Still Cameras and Digital Video Cameras

Handheld Game Systems

_______________________________________________________________ Maxim Integrated Products 1

General Description

Applications

S Li+ Charger with Smart Power Selector, No

S Monitors Battery Temperature and Adjusts Charge

S OT Flags System of a Hot Battery During

S Ultra-Low I

S Common or Separate USB and Adapter Inputs

S Automatic Adapter/USB/Battery Switchover

S Load Peaks in Excess of Adapter Rating are

S Input OVP to 16V (DC) and 9V (USB)

S 40mI SYS-to-BATT Switch

S Thermal Regulation Prevents Overheating

S 4.35V or 5.3V SYS Regulation Voltage

S 1.5A (max) USB Input Current Limit (MAX8934D)

+Denotes a lead(Pb)-free/RoHS-compliant package.

**EP = Exposed pad.

Ordering Information continued and Selector Guide appears

at end of data sheet.

MAX8934AETI+

External MOSFETs Needed

Current and Termination Voltage Automatically

per JEITA Recommendations

Discharge

Supported by Battery

ADAPTER

PART

USB

Typical Operating Circuit

, Always-On 3.3V LDO

-40NC to +85NC

TEMP RANGE

Ordering Information

MAX8934A−

MAX8934E

3.3V ALWAYS-ON

CURRENT

CHARGE

REGULATOR

SYS LOAD

CHARGE

SWITCH

LINEAR

AND

LOAD

CURRENT

PIN-PACKAGE

28 Thin QFN-EP**

BATT

LDO

GND

SYS

Features

SYSTEM

BATTERY

LOAD

Related parts for MAX8934BETI+

MAX8934BETI+ Summary of contents

Page 1

... Handheld Game Systems Smart Power Selector is a trademark of Maxim Integrated Products, Inc. *Protected by U.S. Patent #6,507,172. _______________________________________________________________ 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. S Li+ Charger with Smart Power Selector, No ...

Page 2

Dual-Input Linear Chargers, Smart Power Selector with Advanced Battery Temperature Monitoring ABSOLUTE MAXIMUM RATINGS DC, PEN1 to GND .................................................-0.3V to +16V USB to GND ............................................................-0. GND ...............................................................-0.3V to +4V L LDO to GND ......... -0.3V to ...

Page 3

Dual-Input Linear Chargers, Smart Power Selector with Advanced Battery Temperature Monitoring ELECTRICAL CHARACTERISTICS (continued 5V, CEN = USUS = THMEN = GND PEN1 PEN2 UOK, FLT are unconnected 0.068FF, T ...

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Dual-Input Linear Chargers, Smart Power Selector with Advanced Battery Temperature Monitoring (MAX8934A +25NC, circuit of Figure tery current indicates charging.) USB OPERATING SUPPLY CURRENT vs. USB VOLTAGE (CHARGER ENABLED) 1200 V = 4.2V, BATT V ...

Page 9

Dual-Input Linear Chargers, Smart Power Selector with Advanced Battery Temperature Monitoring (MAX8934A +25NC, circuit of Figure tery current indicates charging.) NORMALIZED CHARGE CURRENT vs. AMBIENT TEMPERATURE (LOW IC POWER DISSIPATION) 1.0100 V = 5V, V ...

Page 10

Dual-Input Linear Chargers, Smart Power Selector with Advanced Battery Temperature Monitoring (MAX8934A +25NC, circuit of Figure tery current indicates charging.) SYS OUTPUT VOLTAGE vs. SYS OUTPUT CURRENT (USB) 5.5 5.3 V BATT V USB 5.1 ...

Page 11

Dual-Input Linear Chargers, Smart Power Selector with Advanced Battery Temperature Monitoring (MAX8934A +25NC, circuit of Figure tery current indicates charging.) DC CONNECT WITH NO USB (R = 22I) SYS MAX8934A/B/C toc20 V BATT 3.6V V ...

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Dual-Input Linear Chargers, Smart Power Selector with Advanced Battery Temperature Monitoring (MAX8934A +25NC, circuit of Figure tery current indicates charging.) LDO OUTPUT VOLTAGE vs. LDO OUTPUT CURRENT (USB DISCONNECTED) 3. 4.0V BATT 3.30 ...

Page 13

Dual-Input Linear Chargers, Smart Power Selector with Advanced Battery Temperature Monitoring (MAX8934A +25NC, circuit of Figure tery current indicates charging.) THM NORMAL TO THM HOT (> T3) TRANSITION MAX8934A/B/C toc32 V THM 1.0V 4.2V V ...

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Dual-Input Linear Chargers, Smart Power Selector with Advanced Battery Temperature Monitoring PIN NAME Charge Complete Output. The DONE active-low, open-drain output pulls low when the charger enters 1 DONE the DONE state. The charger current = 0mA when DONE is ...

Page 15

Dual-Input Linear Chargers, Smart Power Selector with Advanced Battery Temperature Monitoring PIN NAME Thermistor Pullup Supply Switch. Drive THMEN high to enable the THMSW, shorting the THMSW output to LDO. Drive THMEN low to open the THMSW switch. THMSW is ...

Page 16

Dual-Input Linear Chargers, Smart Power Selector with Advanced Battery Temperature Monitoring DC POWER MANAGEMENT DC DC PWR OK CURRENT- LIMITED VOLTAGE DOK REGULATOR SET INPUT LIMIT V V LDO FOR POWER USB POWER MANAGEMENT USB PWR OK ...

Page 17

Dual-Input Linear Chargers, Smart Power Selector with Advanced Battery Temperature Monitoring R PU 1MI CHARGE DONE ADAPTER C DC 10FF OFF CHARGE ON 500mA 100mA R PSET 1.5kI R ISET 3kI C VL 0.1FF 0.068FF THMSW ...

Page 18

Dual-Input Linear Chargers, Smart Power Selector with Advanced Battery Temperature Monitoring R PU 1MI 5-PIN USB CHARGE CONNECTOR DONE 1 VBUS 10FF GND OFF CHARGE ON DC USB 500mA 100mA R ...

Page 19

Dual-Input Linear Chargers, Smart Power Selector with Advanced Battery Temperature Monitoring Table 1. External Components List for Figures 2 and 3 COMPONENT (Figures 2 and filter capacitor SYS output bypass capacitors SYS ...

Page 20

Dual-Input Linear Chargers, Smart Power Selector with Advanced Battery Temperature Monitoring Smart Power Selector The MAX8934_ Smart Power Selector seamlessly distrib- utes power among the external inputs, the battery, and the system load (see the Typical Operating Circuit). The basic ...

Page 21

Dual-Input Linear Chargers, Smart Power Selector with Advanced Battery Temperature Monitoring MAX9834D), so input voltages greater than 5.3V (4.35V for the MAX8934B/MAX8934C/MAX8934E) can increase power dissipation in the limiter. The MAX8934_ input limiter power loss is (V – ...

Page 22

Dual-Input Linear Chargers, Smart Power Selector with Advanced Battery Temperature Monitoring Table 2b. Input Limiter Control Logic (MAX8934D) FEATURE Absolute Maximum Rating Set by R Input Current Limit POWER DOK UOK SOURCE AC Adapter ...

Page 23

Dual-Input Linear Chargers, Smart Power Selector with Advanced Battery Temperature Monitoring age where charge current starts tapering down. When charge current decreases to 10% of the fast-charge current, the charger enters a brief 15s top-off, (60min for the MAX8934B and ...

Page 24

Dual-Input Linear Chargers, Smart Power Selector with Advanced Battery Temperature Monitoring When the MAX8934_ is used with a microprocessor (FP), connect a pullup resistor between CHG and the logic I/O voltage to indicate charge status to the FP. Alternatively, CHG ...

Page 25

Dual-Input Linear Chargers, Smart Power Selector with Advanced Battery Temperature Monitoring LDO CHG CHG CHARGER CONTROL OT THERMISTOR MONITOR Figure 5. Thermistor Monitor Details ______________________________________________________________________________________ SYS LOW-I , ALWAYS-ON 3.3V LDO Q TRACKS SYS WHEN DC AND USB ARE NOT ...

Page 26

Dual-Input Linear Chargers, Smart Power Selector with Advanced Battery Temperature Monitoring 4.2 4.1 4.075 4 TEMPERATURE (NC 0. TEMPERATURE (NC) Figure 6. Safety Region 1: ...

Page 27

Dual-Input Linear Chargers, Smart Power Selector with Advanced Battery Temperature Monitoring STATE DIAGRAM IS FOR 10NC < TEMP < +45NC, OUTSIDE OF THIS RANGE SEE FIGURE 7 V < 2.82V BATT RESET TIMER (PQ, FC, TOP-OFF) ANY CHARGING STATE V ...

Page 28

... DC, SYS, and BATT as short and MULTILAYER PCB wide as possible. Refer to the MAX8934 Evaluation Kit 2286mW for a suitable PCB layout example. (derate 28.6mW/NC above +70NC) 35NC/W 3NC/W PROCESS: BiCMOS PART MAX8934BETI MAX8934CETI+ 14 THM MAX8934DETI+ 13 GND MAX8934EETI+ 12 USUS +Denotes a lead(Pb)-free/RoHS-compliant package. ...

Page 29

Dual-Input Linear Chargers, Smart Power Selector with Advanced 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. Package drawings ...

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... 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 2010 Maxim Integrated Products © ...

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