http://www.www.datasheet4u.com

900,000+ Datasheet PDF Search and Download

Datasheet4U offers most rated semiconductors datasheets pdf



Freescale Semiconductor Electronic Components Datasheet

MC34671 Datasheet

High Input Voltage 600mA Charger

No Preview Available !

MC34671 pdf
www.DFatraSeheesetc4Ua.lceomSemiconductor
Advance Information
Document Number: MC34671
Rev. 1.0, 01/2008
High Input Voltage 600mA
Charger for Single-cell Li-Ion
Batteries
34671
The MC34671 is a cost-effective fully-integrated battery charger for
Li-Ion or Li-Polymer batteries. The high input voltage, up to 28V,
eliminates the input over-voltage-protection circuit required in
handheld devices such as cell phones, Bluetooth accessories and MP3
players.
POWER MANAGEMENT IC
A typical charge cycle includes trickle, constant-current (CC) and
constant-voltage (CV) charge modes. The CC-mode current is
programmable up to 600mA with an external resistor. The voltage
across the external resistor is also used to monitor the actual charge
current. The constant voltage is fixed at 4.2V with 0.7% accuracy over
EP SUFFIX (PB-FREE)
98ASA10774D
a -20°C to 70°C temperature range. The trickle-mode current is preset
8-PIN UDFN
to 20% of the CC-mode current when the battery voltage is lower than
the trickle-mode threshold. The end-of-charge (EOC) current threshold
is preset to 10% of the CC-mode current to save the board space and
cost. A charge current thermal foldback feature limits the charge
ORDERING INFORMATION
current when the IC internal temperature rises to a preset threshold.
The MC34671 also protects the system with its input over-voltage
protection (OVP) feature. In addition, the MC34671 has a 2.6V falling
power-on-reset (POR) threshold, making it perfect to work with current
Device
MC34671AEP/R2
Temperature
Range (TA)
-40°C to 85°C
Package
8-UDFN
limited power supplies. Three indication pins (PPR, CHG and FAST)
can be simply interfaced to a microprocessor or LEDs. When no power supply is connected, or when disabled, the charger draws
less than 1.0µA leakage current from the battery.
Features
• No external MOSFET, reverse-blocking diode or current-sense resistor are required
• Guaranteed maximum 600mA programmable CC-mode current
±0.7% voltage accuracy over -20°C to 70°C
±5% current accuracy over -40°C to 85°C
• 28V maximum voltage for the power input with 11V over-voltage protection threshold
• 2.6V minimum input operating voltage
• Trickle charge for fully discharged batteries
• Charge current monitor
• Charge current thermal foldback
• Pb-free packaging designated by suffix code EP
VIN
34671
VIN
CIN GND
BAT
COUT
TO BATTERY
OFF
ON
CHG
PPR
EN
ISET
FAST
RISET
VIO
TO MCU
Figure 1. 34671 Simplified Application Diagram
* This document contains certain information on a new product.
Specifications and information herein are subject to change without notice.
© Freescale Semiconductor, Inc., 2007-8. All rights reserved.



Freescale Semiconductor Electronic Components Datasheet

MC34671 Datasheet

High Input Voltage 600mA Charger

No Preview Available !

MC34671 pdf
www.DaItNaTSEhReeNtA4UL .BcoLmOCK DIAGRAM
INTERNAL BLOCK DIAGRAM
VIN BAT
PPR
VIN
Monitor
Internal
Supply
REF
VOS
VIN
+– +
BAT
Charge
Control
CHG
EN
Logic
Control
+
VREF
+
IREF
Die
Temp
+ 110°C
+
IEOC
ISET
FAST
GND
Figure 2. 34671 Simplified Internal Block Diagram
34671
2
Analog Integrated Circuit Device Data
Freescale Semiconductor



Freescale Semiconductor Electronic Components Datasheet

MC34671 Datasheet

High Input Voltage 600mA Charger

No Preview Available !

MC34671 pdf
www.DataSheet4U.com
PIN CONNECTIONS
PIN CONNECTIONS
VIN
PPR
CHG
EN
1
2
3
4
EPAD
8 BAT
7 ISET
6 FAST
5 GND
Figure 3. 34671 Pin Connections
Table 1. 34671 Pin Definitions
A functional description of each pin can be found in the Functional Pin Description section beginning on page 11.
Pin Number
1
2
3
4
5
6
7
8
EPAD
Pin Name
VIN
PPR
CHG
EN
GND
FAST
ISET
BAT
EPAD
Pin Function Formal Name
Input
Input supply
Output
Power present
indicator
Output
Charge indicator
Input
Enable
Ground
Ground
Output Fast charge indicator
Output
CC-mode current
setting and charge
current monitor
Output
Charger output
N/A Exposed pad
Definition
The supply input.
Indication of the input power status. Open drain output.
Indication of the charge status. Open drain output.
Enable logic input.
Ground.
Indication of the fast charge status. Open drain output.
CC-mode current setting and monitoring pin.
The charger output pin. Connect this pin to the Li-Ion battery.
Exposed pad for thermal dissipation enhancement. Must be soldered on
the large ground plane on the PCB to increase the thermal dissipation.
The pad must be connected to GND electrically.
Analog Integrated Circuit Device Data
Freescale Semiconductor
34671
3




Part Number MC34671
Description High Input Voltage 600mA Charger
Maker Freescale Semiconductor
Total Page 22 Pages
PDF Download
MC34671 pdf
Download PDF File
MC34671 pdf
View for Mobile






Related Datasheet

1 MC34670 IEEE 802.3af PD Freescale Semiconductor
Freescale Semiconductor
MC34670 pdf
2 MC34671 High Input Voltage 600mA Charger Freescale Semiconductor
Freescale Semiconductor
MC34671 pdf




Part Number Start With

0    1    2    3    4    5    6    7    8    9    A    B    C    D    E    F    G    H    I    J    K    L    M    N    O    P    Q    R    S    T    U    V    W    X    Y    Z

site map

webmaste! click here

contact us

Buy Components