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参数资料
| 型号： | MAX8856ETD+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 1/13页 |
| 文件大小： | 0K |
| 描述： | IC BATT CHARGER LI+ 1CELL 14TDFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 功能： | 充电管理 |
| 电池化学： | 锂离子（Li-Ion） |
| 电源电压： | 0 V ~ 14 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 14-WFDFN 裸露焊盘 |
| 供应商设备封装： | 14-TDFN-EP（3x3） |
| 包装： | 带卷 (TR) |
ATION
ILABLE
19-4277; Rev 0; 9/08
EVALU
AVA
KIT
USB/AC Adapter, Li+ Linear Battery Charger
with Integrated 50m Ω Battery Switch in TDFN
General Description
The MAX8856 complete 1-cell Li+ battery charge-man-
agement IC operates from either a USB port or AC
adapter. It integrates a battery disconnect switch, cur-
rent-sense circuit, PMOS pass element, and thermal-
regulation circuitry, while eliminating the external
reverse-blocking Schottky diode, to create a simple
and small charging solution. The charging sequence
initiates from power-OK indication, through prequalifi-
cation, fast-charge, top-off charge, and finally charg-
ing-complete indication for single-cell Li+ batteries.
Charging is controlled using constant current, constant
voltage, or constant die-temperature (CCCVCT J ) regu-
lation for safe operation in handhelds.
Two logic inputs ( EN1 , EN2 ) select suspend mode,
100mA, 500mA, or ≤ 1A input current limits to comply
with USB requirements. Proprietary thermal-regulation
circuitry limits the die temperature to +100°C to prevent
excessive heat on the system PC board. Additional
safety features include an NTC thermistor input (THM)
to protect the battery. A 3.5V to 4.2V SYS output, in
conjunction with the low-R DSON battery switch, powers
Features
? Small, 3mm x 3mm Thermally Enhanced TDFN
Package (0.8mm max height)
? USB-Compliant Suspend Mode (20μA)
? Selectable 100mA, 500mA, and Up to 1A Input
Current Limits
? USB or AC Adapter Input
? +6V to +14V Input Overvoltage Protection
? Input UVLO Below +4V Rising (3.5V Falling)
? Automatic Current Sharing Between Battery
Charging and System
? Die Temperature Regulation (+100°C)
? Low Dropout Voltage, 250mV at 0.5A
? NTC Thermistor Input
? Charge Status and Input-Supply Detection Flags
Ordering Information
the system even when the battery is deeply discharged
or not installed. The IC also offers a +3.3V/500μA out-
put (V L ), a charging status flag ( CHG ), and an input-
supply detection flag ( POK ). The MAX8856 operates
from a +4.25V to +5.5V supply and includes undervolt-
PART
MAX8856ETD+
TEMP RANGE
-40°C to +85°C
PIN-PACKAGE
14 TDFN 3mm x
3mm (T1433-1)
TOP
MARK
AEJ
age lockout below +3.4V and overvoltage protection
up to +14V.
Applications
Cellular Phones, Smartphones, PDAs
+Denotes a lead-free/RoHS-compliant package.
Typical Operating Circuit
Digital Cameras, MP3 Players
USB Appliances, Charging Cradles and Docks
STATUS
USB/AC-ADAPTER
INDICATORS
Pin Configuration
OVP UP TO 14V
IN
GND
CHG
POK
SYS 3.5V TO 4.2V
0.1 μ F
TOP VIEW
V L
14 13 12 11 10
MA8856
9
8
INPUT
CURRENT
SELECTION
μ P
EN1
EN2
GATE
SETI
CONTROL
MAX8856
BAT
THM
1
2
3
4
5
6
7
TDFN
________________________________________________________________ Maxim Integrated Products
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.
1
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