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What is 34671?

This electronic component, produced by the manufacturer "Freescale Semiconductor", performs the same function as "High Input Voltage 600mA Charger".


34671 Datasheet PDF - Freescale Semiconductor

Part Number 34671
Description High Input Voltage 600mA Charger
Manufacturers Freescale Semiconductor 
Logo Freescale Semiconductor Logo 


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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.

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34671 equivalent
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ELECTRICAL CHARACTERISTICS
STATIC ELECTRICAL CHARACTERISTICS
STATIC ELECTRICAL CHARACTERISTICS
Table 3. Static Electrical Characteristics
Characteristics noted under conditions VIN = 5.0V, -40°C TA 85°C, CIN = 1.0µF, COUT = 2.2µF (see Figure 1), unless
otherwise noted. Typical values noted reflect the approximate parameter means at VIN = 5.0V and TA = 25°C under nominal
conditions, unless otherwise noted.
Characteristic
Symbol Min Typ Max Unit
POWER INPUT
Input Voltage Range(5)
VIN Pin Supply Current
Charger enabled(6)
Charger disabled
VIN 2.6
IIN
-
-
Regulated Output Voltage
VIN = 5.0V; IBAT = 10mA; TA = 25°C
VIN = 5.0V; IBAT = 10mA; TA = -20 to 70°C
VIN = 5.0V; IBAT = 10mA; TA = -40 to 85°C
VBAT
4.185
4.170
4.158
Power MOSFET On Resistance
VBAT = 4V; IBAT = 500mA; ICHG = 600mA
RDS(ON)
-
BAT Pin Standby Current
VIN not powered or charger disabled
ISTDBY
-
Power On Reset
Rising VIN threshold
Falling VIN threshold
VPOR
3.0
-
VIN-BAT Offset Voltage
Rising threshold
Falling threshold
VOS
-
1.0
Over-voltage Protection Rising Threshold
Over-voltage Protection Threshold Hysteresis
VOVP
VOVPHYS
10
-
CHARGE CURRENT
Constant Current Mode Charge Current Range(7)
ICHG Accuracy
For ICHG between 300mA to 600mA(7)
For ICHG between 50mA to 300mA (Tested at 300mA)
ICHG
ICHG
50
95
90
Trickle-mode Charge Current
ITRKL
16
End-of-Charge (EOC) Threshold
When ICHG is set to 300mA
IEOC
20
ISET Pin Voltage for ICHG Reference(7)
VISET
-
Notes
5. Refer to the Power-on-Reset parameter for VIN turn on and turn off values.
6. Supply current does not include the current delivered to the battery through the BAT pin.
7. Not tested. Guaranteed by design.
-
1400
-
4.20
4.20
4.20
500
-
-
2.4
-
-
11
400
-
100
100
20
30
1.0
10
-
350
4.215
4.230
4.230
700
1.0
3.9
2.6
60
22
12
-
V
µA
V
m
µA
V
mV
V
mV
600 mA
%
105
110
24 % ICHG
mA
40
-V
Analog Integrated Circuit Device Data
Freescale Semiconductor
34671
5


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34671The function is High Input Voltage 600mA Charger. Freescale SemiconductorFreescale Semiconductor

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