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MAX8934GETI+

Description
POWER SUPPLY SUPPORT CKT, QCC28
CategoryPower/power management    The power supply circuit   
File Size2MB,29 Pages
ManufacturerMaxim
Websitehttps://www.maximintegrated.com/en.html
Environmental Compliance
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MAX8934GETI+ Overview

POWER SUPPLY SUPPORT CKT, QCC28

MAX8934GETI+ Parametric

Parameter NameAttribute value
Is it lead-free?Lead free
Is it Rohs certified?conform to
MakerMaxim
Parts packaging codeQFN
package instructionHVQCCN, LCC28,.16SQ,16
Contacts28
Reach Compliance Codecompli
ECCN codeEAR99
Factory Lead Time20 weeks
Adjustable thresholdNO
Analog Integrated Circuits - Other TypesPOWER SUPPLY SUPPORT CIRCUIT
JESD-30 codeS-XQCC-N28
JESD-609 codee3
length4 mm
Humidity sensitivity level1
Number of channels1
Number of functions1
Number of terminals28
Maximum operating temperature85 °C
Minimum operating temperature-40 °C
Package body materialUNSPECIFIED
encapsulated codeHVQCCN
Encapsulate equivalent codeLCC28,.16SQ,16
Package shapeSQUARE
Package formCHIP CARRIER
Peak Reflow Temperature (Celsius)NOT SPECIFIED
power supply5 V
Certification statusNot Qualified
Maximum seat height0.8 mm
Maximum supply current (Isup)2 mA
Maximum supply voltage (Vsup)6.6 V
Minimum supply voltage (Vsup)4.1 V
Nominal supply voltage (Vsup)5 V
surface mountYES
technologyBICMOS
Temperature levelINDUSTRIAL
Terminal surfaceMatte Tin (Sn)
Terminal formNO LEAD
Terminal pitch0.4 mm
Terminal locationQUAD
Maximum time at peak reflow temperatureNOT SPECIFIED
width4 mm
MAX8934G
Dual-Input Linear Charger, Smart Power Selector
with Advanced Battery Temperature Monitoring
General Description
The MAX8934G dual-input Li+/Li-Poly linear battery char-
ger with Smart Power SelectorK safely charges a single
Li+/Li-Poly cell in accordance with JEITA* recommenda-
tions. The MAX8934G monitors the battery temperature
(T
BATT
) while charging, and automatically adjusts the
fast-charge current and charge termination voltage as the
battery temperature varies. The MAX8934G 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. Safety region
2 is supported (see Figure 6 for details). An ultra-low I
Q
,
always-on LDO provides an additional 3.3V supply for
system power.
The MAX8934G 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 MAX8934G 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. Automatic input
selection switches the system load from battery to external
power.
The MAX8934G 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 MAX8934G is available in a 28-pin, 4mm x 4mm,
TQFN package.
Features
S
Li+ Charger with Smart Power Selector, No
External MOSFETs Needed
S
Monitors Battery Temperature and Adjusts Charge
Current and Termination Voltage Automatically
per JEITA Recommendations
S
OT
Flags System of a Hot Battery During
Discharge
S
Ultra-Low I
Q
, Always-On 3.3V LDO
S
Common or Separate USB and Adapter Inputs
S
Automatic Adapter/USB/Battery Switchover
S
Load Peaks in Excess of Adapter Rating are
Supported by Battery
S
Input OVP to 16V (DC) and 9V (USB)
S
40mI SYS-to-BATT Switch
S
Thermal Regulation Prevents Overheating
S
4.35V SYS Regulation Voltage
Ordering Information
PART
MAX8934GETI+
**EP
= Exposed pad.
TEMP RANGE
-40NC to +85NC
PIN-PACKAGE
28 Thin QFN-EP**
+Denotes
a lead(Pb)-free/RoHS-compliant package.
Typical Operating Circuit
LDO
3.3V ALWAYS-ON
LINEAR
REGULATOR
AC
ADAPTER
DC
Q1
CHARGE
CURRENT
Q3
CHARGE
AND
SYS LOAD
SWITCH
SYS
LOAD
CURRENT
SYSTEM
LOAD
Applications
PDAs, Palmtop, and Wireless Handhelds
Portable Media, MP3 Players, and PNDs
Digital Still Cameras and Digital Video Cameras
Handheld Game Systems
*JEITA
(Japan Electronics and Information Technology
Industries Association) Standard, A Guide to the Safe Use of
Secondary Lithium Ion Batteries on Notebook–Type Personal
Computers, April 20, 2007.
Smart Power Selector is a trademark of Maxim Integrated
Products, Inc.
USB
USB Q2
BATT
BATTERY
GND
MAX8934G
For pricing, delivery, and ordering information, please contact Maxim Direct
at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.
19-5296; Rev 0; 6/10

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