HB6298A-2009 Datasheet PDF - Huatai Electronics


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HB6298A-2009
Huatai Electronics

Part Number HB6298A-2009
Description Switchmode Single-Cell/Two-Cell Li-ion/Li Polymer Battery Charger
Page 13 Pages

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HB6298A-2009.12.28
Switchmode Single-Cell/Two-Cell Li-ion/Li Polymer Battery Charger
1HB6298A functions
1.1Features
● High conversion efficiency charger for
1-cell/2-cell Li-ion/Li polymer battery
● 0.5% voltage accuracy
● Full charged voltage trimming by external
resistors
● Build-in battery detection
● Integrated power MOSFET
● Soft starting
● 300kHz PWM Oscillator frequency
● Programmable charge current up to 1.5A
● Reverse leakage protection prevents
battery drainage
● NTC Thermistor interface for battery
temperature monitor
● Status outputs for LED
● Cycle-by-cycle current limit, charge
current thermal foldback , short circuit
protection
● 18V absolute maximum voltage rating on IN
pins
● Ambient temperature range: -20℃~70℃
2Typical application circuit
1.2Applications
● Handheld devices, include medical
handhelds
● Portable-DVD,PDA,cell phones and smart
phones
● Portable instruments
● Self-charging battery packs
● Stand-alone chargers
1.3Introduction
HB6298A is an integrated 1-cell/2-cell
Li-ion/Li polymer switch-mode charge management
device, targeted at a wide range of portable
applications. HB6298A offers integrated power FET,
high-accuracy current and voltage regulation,
charge preconditioning, charge status, and charge
termination, in a small TSSOP20 package. HB6298A
charges the battary in three phase: preconditioning,
constant current(CC), and constant voltage(CV).
The charge current is programmable with an
external resistor up to 1.5A. HB6298A features
cycle-by-cycle current limit, charge current
thermal foldback and short circuit protection to
guarantee safe operation. Additional features
include NTC thermistor interface to monitor
the battery temperature.
Figure2.1、HB6298A application circuit
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3HB6298A function block
HB6298A-2009.12.28
HB6298A
VIN
VIN
VCC
UVLO
POR
VTSB
VCC-6
REFERENCE
REF1
REF2
REF3
BAT
2.1V
OUT
OUT
V(3.0A)
POR/SUSPEND/FAULT
PKILim
Q SET S
Q CLR R
OSC
SNS
RAMP
CA
BAT
EA
REF1
VA VTRIM
CHARGE
2.1V
Vrch
CC
Vshort
CONTROL
LOGIC
ISET 1
CURRENT
REFERENCE
TS
TTC
SLEEP
GND
NTC
interface
Over Tem
TIMER CLK
Clock
Term_Det
CURRENT
SENSE
ISET 2
STAT1
STAT2
CELL
Figure3.1、HB6298A function bock
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HB6298A-2009.12.28
4Pin Configuration
STAT2 1
STAT1 2
VIN 3
VIN 4
VCC 5
NC 6
SLEEP 7
TTC 8
TS 9
GND 10
HB6298
20 CELL
19 OUT
18 OUT
17 ISET1
16 ISET2
15 VTRIM
14 VTSB
13 NC
12 SNS
11 BAT
Figure 4.1HB6298A pin configuration
NO.
1
2
3&4
5
6
7
8
9
10
11
12
13
14
15
16
17
18&19
20
SYMBOL
STAT2
STAT1
VIN
VCC
NC
SLEEP
TTC
TS
GND
BAT
SNS
NC
VTSB
VTRIM
ISET2
ISET1
OUT
CELL
List 4.1、HB6298A description
I/O DESCRIPTION
O STAT1(GREEN)
STAT2(RED) DISCRIPTION
O off
off Charge suspend, no battery
off on In charge
on off End of charge
off PULSE1(0.5Hz) FAULT condition
off PULSE2(2.0Hz) Battery temperature abnormal
I Charger input voltage, bypass it with a 10μF capacitor from VIN to GND
I Analog device input, a capacitor to VSS is required
-
O SLEEP mode output,to control the external power MOSFET
- Connect a capacitor from this node to VSS to set the HB6298A timer, when
this input is low, the timer and termination detection are disabled
I Feed back of battery temperature
- Analog ground input
I Battery voltage-sense input
I Charge current-sense input
-
O 3.2V voltage reference , capable of driving 10mA load, connect a
capacitor(2.2uF) between this output and VSS
I Trimming of full charged voltage with external resistor
I Charge current set point (termination), set by a resistor connected to VSS
I Charge current set point (fast charge and precharge), set by a resistor
O Power PMOSFET output, inductor connection point
I Low: two cell application
High: single cell charge
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5HB6298A recommended operating condition
HB6298A-2009.12.28
List 5.1、HB6298A recommended operating condition
PARAMETER
Min Typical Max Unit
Notes
Supply voltage
4.5
6
18 V
Single cell
Supply voltage
8.8 12 18 V
Two cell
Ambient temperature
-20
70 ℃
6HB6298A electrical specification
List 6.1、HB6298A electrical specification (Ta=25℃)
PARAMETER
SYM TEST CONDITION MIN
TYP
INPUT CURRENTS
VCC supply current
IVCC
SLEEP mode current
VI(BAT)=4.2V
ISLP
VI(BAT)=8.4V
7
14
VOLTAGE REGULATION
Output voltage
VOREG
Cells=High
Cells=Low
4.158
8.316
4.20
8.4
Charge current
CC charge current
ICHG
200
Voltage across RSNS
VIREG
100
Output current set voltage
VISET1
1
Output current set factor
KISET1
1000
PRECHARGE CURRENT REGULATION
Precharge to fast charge
transition voltage
VLOWV
Cells=High
Cells=low
3
6
Precharge current range
IPRECHG
40
Precharge set voltage
VISET1
200
Precharge set factor
KISET1
1000
CHARGE TERMINATION (CURRENT TAPER) DETECTION
Termination current range
ITERM
20
Charge-termination
VISET2
200
detection set voltage
Termination current set
KISET2
1000
factor
BATTERY RECHARGE THRESHOLD
Recharge threshold voltage
VRCH
4.1
TTC INPUT
TTC timer multiplier
KTTC
4.66
CTTC capacitor rang
CTTC
10
PWM
MAX UNITS
5 mA
uA
4.242
8.484
V
V
1500
mA
mV
V
V/A
V
V
300 mA
mV
V/A
300 mA
mV
V/A
V/cell
H/10nF
nF
4/13




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