900,000+ datasheet pdf search and download

Datasheet4U offers most rated semiconductors data sheet pdf






PowTech

PT1502 Datasheet Preview

PT1502 Datasheet

PMU

No Preview Available !

GENERAL DESCRIPTION
The PT1502 is a integrated power management unit for
small handheld portable applications. It contains a
single-cell Lithium Ion battery charger, a synchronous
step-down DC-DC converter and 2 Low Dropout
Regulators. It allows charging from both wall adapter
and USB port. When charging from wall adapter, the
PT1502 increases the charging current automatically.
The battery charger is a highly integrated charging
management device targeted at space limited portable
applications. It offers an integrated MOSFET and
current sensor, reverse blocking protection, high
accuracy current and voltage regulation, and charge
termination. It charges a battery in three phases: trickle
charging, constant current, and constant voltage. No
external sense resistor is needed, and no blocking diode
is required due to the internal MOSFET architecture.
The thermal feedback regulates the charging current to
limit the chip temperature during high power operation
or high ambient temperature to maximize the charge
rate without risk of overheating. The charge voltage is
fixed at 4.2V, and the charge current can be
programmed externally with a single resistor. The
PT1502 automatically terminates the charge cycle when
FEATURES
Integrated switch for USB/AC Adapter supply
120uA quiescent supply current(includes
step-down DC-DC converters and two low dropout
regulators)
Integrated single-cell lithium ion battery charger
Auto thermal regulated
Charging current up to 1.2 A
Charging current adjusted by external
resistor
Integrated step-down DC-DC converter
Output voltage adjusted by external resistor
Output current up to 800mA
APPLICATIONS
MP3/4
PDAs
PT1502
PMU for Portable Applications
the charge current drops to 1/10 the programmed value
after the final float voltage is reached. The PT1502
automatically re-starts the charge if the battery voltage
falls below an internal threshold.
The step-down converter is a high efficiency monolithic
current mode synchronous buck regulator with a
constant operation frequency. A main switch and a
synchronous switch are integrated in PT1502, the
device has high efficiency and no external Schottky
diode needed. 100% duty cycle provides low dropout
operation, extending battery life in portable systems.
Automatic burst mode operation at light loads provides
high efficiency. Internal 1.5MHz switching frequency
allowing the use of small surface mount inductors and
capacitors. The output voltage can be adjusted by
external resistors.
The two low-dropout voltage regulators are designed
for portable and wireless applications. It can provides
better than 60dB PSRR at 1kHz. The output current can
be up to 300mA. One regulators output voltage is
fixed at 3.0V, and the other one is adjusted to
2.5V,2.8V,3.0V,3.3V by two control pins.
1.5M Hz fixed switching frequency
Over-current and over-temperature protection
Integrated two low dropout regulators
LDO1: output voltage 3.0Vup to 300mA
output current
LDO2: output voltage optional for
2.5V/2.8V/3.0V/3.3Vup to 300mA output
current
PSRR: 60dB@1k Hz
Over-current and over-temperature protection
QFN204X4package
RoHS compliant
GSM/CDMA mobile phone
Portable media players
Free Datasheet http://www.datasheet4u.com/




PowTech

PT1502 Datasheet Preview

PT1502 Datasheet

PMU

No Preview Available !

ORDERING INFORMATION
PT1502
PMU for Portable Applications
PACKAGE
QFN20
Note:
TEMPERATURE
RANGE
-40 oC to 85 oC
ORDERING PART
NUMBER
PT1502DQFN
xxxxxX
Assembly Factory Code
Lot Number
TRANSPORT
MEDIA
Tape and Reel
5000 units
MARKING
PT1502
xxxxxX
TYPICAL APPLICATION CIRCUIT
USB
USB_ IN
AC_ DC
CHGIN
10k AC_IN
CHG_ PROG
1K
To Battery
To Battery
PVDD
1k 10uF
sw_ pwr
100k
PLAY_ ON
uP_ RESET
PWR_ HOLD
100k
Enable
Control
Charger
Buck
DC - DC
REF
To Battery
AVDD
10uF
LDO 1
LDO 2
PIN ASSIGNMENT
AGND
BAT
10uF
NC
LX 2.2 uH
300k/R2
BUCKFB
PGND
core:1. 2V 600mA
22pF
300k/R1
4.7 uF
UVLO
BAT_ LOW
LDOOUT1 3.0V 200mA
1 uF
LDOOUT2 2.5/2.8/3.0/3.3V
200mA
1uF To Battery
LDO2_SET0 100k
LDO2_SET1
100 k
20 19 18 17 16
LDO2_SET0 1
LDO2_SET1 2
AGND 3
PLAY_ON 4
PWR_HOLD 5
21
15 NC
14 CHGIN
13 AC_IN
12 USB_IN
11 PGND
6 7 8 9 10
Free Datasheet http://www.datasheet4u.com/


Part Number PT1502
Description PMU
Maker PowTech
PDF Download

PT1502 Datasheet PDF






Similar Datasheet

1 PT1502 PMU
PowTech
2 PT1504-6B 5mm Phototransistor
Everlight Electronics
3 PT1505 White LED Driver & PMU
PowTech
4 PT150KN16 Diode
Nihon Inter Electronics
5 PT150KN8 Diode
Nihon Inter Electronics
6 PT150S12 Diode
Nihon Inter Electronics
7 PT150S16 Diode
Nihon Inter Electronics
8 PT150S8 Diode
Nihon Inter Electronics





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

Privacy Policy