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  Microchip Technology Semiconductor Electronic Components Datasheet  

TC3827 Datasheet

Lithium-Ion Battery Charger

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TC3827 pdf
TC3827
Lithium-Ion Battery Charger
FEATURES
s Low Power Dissipation
s Shutdown Current: 1µA (Typical)
s Space-Saving 8-Pin MSOP Package
s No Inductor Required
s 1% Overall System Accuracy
s Charge Current Monitor Output
s Charge Status Indicator Output
s Foldback Current Limiting
s –20°C to +85°C Ambient Operating
Temperature Range
TYPICAL APPLICATIONS
s PDAs
s Cradle Chargers
s Li-Ion Battery Chargers
s Desktop Computers
s Hand-Held Instruments
s Cellular Telephones
s Battery Operated Devices
s Self-Charging Battery Packs
PIN CONFIGURATION
8-Pin MSOP
SHDN 1
GND 2
MODE 3
IMON 4
TC3827
8 VIN
7 VSNS
6 VDRV
5 VOUT
TYPICAL APPLICATION CIRCUIT
+5 VIN
LED
MODE
IMON
SHDN
Controller
RSENSE
NDP6020P
PMOS
10µF
VIN VSNS
VDRV
VOUT
MODE TC3827
IMON
SHDN
GND
GENERAL DESCRIPTION
The TC3827 is a battery charger controller for a single
cell Li-Ion battery. Using an external PMOS transistor, safe
and fast charging of a single Li-Ion cell is accomplished.
Features include over-current foldback, charge current
monitor, and charge status LED indicator output. An overall
system accuracy of 1% ensures that the cell capacity is fully
utilized without cycle life degradation. An external resistor
sets charge current.
The TC3827 operates with an input voltage range from
4.5V to 5.5V. It is specified over the ambient operating
temperature range of –20°C to +85°C and is available in a
space-saving 8-Pin MSOP.
ORDERING INFORMATION
Part No.
TC3827-4.1VUA
TC3827-4.2VUA
Package
8-Pin MSOP
8-Pin MSOP
Temperature
Range
–20°C to +85°C
–20°C to +85°C
FUNCTIONAL BLOCK DIAGRAM
VIN
VSNS
+
C/A
GND
VOUT
VREF
+
E/A
+
E/A
SHDN
+
22µF
Li-Ion
K IMON
CONTROL
BLOCK
VDRV
MODE
TC3827
Figure 1. TC3827 Typical Application Circuit
© 2001 Microchip Technology Inc. DS21558A
TC3827-2 12/12/00
Free Datasheet http://www.datasheet4u.com/


  Microchip Technology Semiconductor Electronic Components Datasheet  

TC3827 Datasheet

Lithium-Ion Battery Charger

No Preview Available !

TC3827 pdf
Lithium-Ion Battery Charger
TC3827
ABSOLUTE MAXIMUM RATINGS*
Input Voltage (VIN), VOUT, VSNS, MODE, and IMON ...........
.............................................................. –0.3V to 6.0V
SHDN ...............................................–0.3V to (VIN + 0.3V)
8-Pin MSOP (derate 4.1mW/°C above +70°C) ..... 330mW
Operating Ambient Temperature Range .. –20°C to +85°C
Storage Temperature Range ................. –65°C to +150°C
Lead Temperature (Soldering, 10 sec) ................. +300°C
Vapor Phase (60 sec) ........................................... +210°C
Infrared (15 sec) .................................................... +220°C
IIMON (source) ......................................................0.375mA
IMODE (sink) .............................................................. 20mA
IDRV ............................................................................1mA
ESD Rating ................................................................. 2kV
*Static-sensitive device. Unused devices must be stored in conductive
material. Protect devices from static discharge and static fields. Stresses
above those listed under Absolute Maximum Ratings may cause perma-
nent damage to the device. These are stress ratings only and functional
operation of the device at these or any other conditions above those
indicated in the operational sections of the specifications is not implied.
Exposure to Absolute Maximum Rating Conditions for extended periods
may affect device reliability.
ELECTRICAL CHARACTERISTICS: VIN = [VREG + 1V] , TA = -20°C to +85°C, unless otherwise noted. Typical values
at TA = +25°C, RSENSE = 500m, Test Circuit Figure 3.
Symbol
Parameter
Test Conditions
Min Typ
Max Units
IVIN
Power Supply Current
Shutdown Mode, VSHDN = 0V
Constant Voltage Mode
—1
15 µA
— 350 560
VIN Power Supply Voltage In
Voltage Regulation (Constant Voltage Mode)
4.5 —
5.5
V
VREG
Battery Regulation Volts
3827- 4.2VUA
3827- 4.1VUA
— 4.2
— 4.1
V
VOUT
Output Voltage Accuracy
LIREG
Line Regulation
LDREG
Load Regulation
IDISCH
Output Reverse Leakage
MOSFET Gate Drive
VIN = VREG + 1V to 5.5V,
VIN = 4.5V to 5.5V, IOUT = 75mA
IOUT =10mA to 75mA
VIN = Floating, VOUT = VREG
–1 —
–10 —
–1 ±0.2
—1
+1
+10
+1
5
%
mV
mV
µA
IDRV
Gate Drive Current
Sink, Constant Voltage Mode (Note 1)
1 mA
Source, Constant Voltage Mode (Note 1) 0.08
VDRV
Gate Drive Min Voltage
Current Sense Amp
— 1.0
V
VGAIN
VCS
ISC
K
GAIN (VGS/VOUT)
Current Limit Threshold
Short Circuit Current
KFactor
(VIN – VSNS) @ IMAX
— 100 — dB
40 53
75 mV
— 46
— mA
— 0.46
A/A
MODE
VTH Mode Threshold
VOL
Mode Low Voltage
ISINK = 10mA, VOUT = 3.5V
ILK
Mode Leakage Current
VMODE = 5.5V, IO = 0mA,
MODE = Constant Voltage
— VREG
— — 400
——
+1
V
mV
µA
SHDN
VIH
VIL
ILK
IMON
VIMON
(VIN - VSNS)
SHDN High Threshold
SHDN Low Threshold
SHDN Leakage Current
Current Sense Gain
VSHDN = 0V to 5V
VO = 0V to 3.5V,RL > 20k
40 —
–—
——
— 26
— %VDD
25 %VDD
+1 µA
— V/V
Notes: 1. Where VOUT = 1% from Nominal, continuous current.
TC3827-2 12/12/00
2 © 2001 Microchip Technology Inc. DS21558A
Free Datasheet http://www.datasheet4u.com/


Part Number TC3827
Description Lithium-Ion Battery Charger
Maker Microchip
Total Page 10 Pages
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