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BPSEMI |
BPSEMI
BP13504
Standalone Linear Li-Ion Charger with
Thermal Regulation
General Description
The BP13504 is a comp lete linear charger for single
cell lithium-ion bat teries. With small TDFN- 10
package and few external components, BP13504 is
well suited for portable applications. In addition, the
BP13504 is specific ally designed t o work within USB
power specifications.
No ext ernal s ense resist or and bl ocking d iode are
required. Charging cu rrent can be programmed
externally wi th a sin gle r esistor. T he b uilt-in th ermal
regulation facilitates charging with maximum power
without risk of overheating.
The BP13504 always preconditions the battery with
1/10 of t he program med charge cu rrent at the
beginning of a charge cycle, after it verifies that the
battery can be fast
-charged. The BP13504
automatically te rminates the c harge c ycle w hen
the charge current drops to 1/10th the programmed
value after the final float voltage is reached.
The BP13504 feat ures 13. 5V maximum rat ing
voltage for AC adapter, and it pro vides the charge
current up to 1.2A. Ot her feat ures incl ude batt ery
temperature monitoring, reverse current protection,
shutdown mode, charging current monit or, under
voltage lockout, aut omatic recha rge a nd st atus
indicator.
Features
Programmable charge current up to 1.2A
No MOSFET, sense resistor or blocking diode
required
Complete linear charger in TDFN-10 for single
cell li-ion batteries
Thermal regulation maximizes charge rate
without risk of overheating
Thermistor input for temperature qualified
charging
Charges single cell Li-ion batteries directly
from USB port.
Preset 4.2V charge voltage with ̈́1%
accuracy
Automatic recharge
Charge status indicator
C/10 charge termination
Battery reverse leakage current less than 1uA
Applications
Wireless handsets
Hand-held instruments
Portable information appliances
1
http://www.Datasheet4U.com
Typical Application Circuit
ACIN =
4.5V~13.5V
BP13504
ACIN
BATT
1k 1k
1uF TS
CHG_SB ENB
PGOODB ISETA
GND
BP13504
4.2V Li-Ion
Battery Pack
1
1uF 1uF
RSET
Complete Charger Cycle
VBAT
IBAT
˅ˁˌ˩
ˣ̅˸˶˻˴̅˺˸
˧˻̅˸̆˻̂˿˷
VIset
˄˂˄˃ʳˣ̅̂˺̅˴̀̀˸˷
˖˻˴̅˺˸ʳ˖̈̅̅˸́̇
˙˴̆̇ʳ˖ ˻ ˴̅ ˺ ˸
ˣ˻ ˴̆˸
ˣ̅̂˺̅˴̀̀˸˷ʳ˖˻˴̅˺˸ʳ˖̈̅̅˸́̇
ˇˁ˃ˈ˩
˥˸˶˻˴̅˺˸
˧˻̅˸̆˻̂˿˷
˙˴̆̇ʳ˖ ˻ ˴̅ ˺ ˸
ˣ˻˴̆˸
˖̂́̆̇˴́̇ʳ˩̂˿̇˴˺˸
ˣ˻˴̆˸
˦̇˴́˷˵̌
ˣ˻˴̆˸
˥˸ˀ˶˻˴̅˺˸
ˣ˻˴̆˸
2
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