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PDF TD9157 Data sheet ( Hoja de datos )
| Número de pieza | TD9157 | |
| Descripción | Fully Integrated Switch-Mode Charger | |
| Fabricantes | Techcode | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de TD9157 (archivo pdf) en la parte inferior de esta página. Total 30 Páginas | ||
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T echcode®
DATASHEET
Fully Integrated Switch-Mode ChargerWith USB Compliance and USB-OTG Support TD9157
Charge Current Regulation Accuracy: ±5%
General Description
z Input Voltage Based Dynamic Power Management (VIN
z
The TD9157 is a compact, flexible, high‐efficiency, z
USB‐friendly switch‐mode charge management device for
single‐cell Li‐ion and Li‐polymer batteries used in a wide z
range of portable applications. The charge parameters can be
programmed through an I2C interface. The IC integrates a z
synchronous PWM controller, power MOSFETs, input current z
sensing, high‐accuracy current and voltage regulation, and z
charge termination, into a small WCSP package.
z
The IC charges the battery in three phases: conditioning, z
constant current and constant voltage. The input current is
automatically limited to the value set by the host. Charge is
terminated based on battery voltage and user‐selectable
minimum current level. A safety timer with reset control
provides a safety backup for I2C interface. During normal
operation, The IC automatically restarts the charge cycle if the
battery voltage falls below an internal threshold and
automatically enters sleep mode or high impedance mode z
when the input supply is removed. The charge status can be
reported to the host using the I2C interface. During the z
charging process, the IC monitors its junction temperature
(TJ) and reduces the charge current once TJ increases to z
about 125°C. To support USB OTG device, TD9157 can provide
VBUS (5.05V) by boosting the battery voltage. The IC is
available in 20‐pin WCSP package.
DPM)
Bad Adaptor Detection and Rejection
Safety Limit Register for Maximum Charge Voltage and
Current Limiting
High‐Efficiency Mini‐USB/AC Battery Charger for
Single‐Cell Li‐Ion and Li‐Polymer Battery Packs
20‐V Absolute Maximum Input Voltage Rating
6.5‐V Maximum Operating Input Voltage
Built‐In Input Current Sensing and Limiting
Integrated Power FETs for Up To 1.25‐A Charge Rate
Programmable Charge Parameters through I2C™
Compatible Interface (up to 3.4 Mbps):
Input Current Limit
VIN DPM Threshold
Fast‐Charge/Termination Current
Charge Regulation Voltage (3.5 V to 4.44 V)
Low Charge Current Mode Enable/Disable
Termination Enable/Disable
Synchronous Fixed‐Frequency PWM Controller
Operating at 3 MHz With 0% to 99.5% Duty Cycle
Automatic High Impedance Mode for Low Power
Consumption
Robust Protection
Reverse Leakage Protection Prevents Battery Drainage
Thermal Regulation and Protection
Input/Output Overvoltage Protection
z Status Output for Charging and Faults
Features
z USB Friendly Boot‐Up Sequence
z Automatic Charging
z Boost Mode Operation for USB OTG
z Power Up System without Battery
z Charge Faster than Linear Chargers
Input Voltage Range (from Battery): 3.2 V to 4.5V
z 2.1 mm x 2 mm 20‐Pin WCSP Package
z High‐Accuracy Voltage and Current Regulation
Input Current Regulation Accuracy: ±5%(100 mA and 500 Applications
mA)
Charge Voltage Regulation Accuracy:
±0.5% (25°C), ±1% (0°C to 125°C)
z Mobile and Smart Phones
z M3 Players
z Handheld Devices
October, 20, 2011. Techcode Semiconductor Limited www.techcodesemi.com
1
1 page  
T echcode®
DATASHEET
Fully Integrated Switch-Mode ChargerWith USB Compliance and USB-OTG Support TD9157
Functional Block Diagram(Cont.)
Function Block Diagram of TD9157 in Boost Mode
October, 20, 2011. Techcode Semiconductor Limited www.techcodesemi.com
5
5 Page 
T echcode®
DATASHEET
Fully Integrated Switch-Mode ChargerWith USB Compliance and USB-OTG Support TD9157
Typical Operating Characteristics
VBUS = 0-5V, Iin_limit = 500mA, Voreg = 4.2V
VBAT = 3.5V, ICHG = 550mA, 32S mode
VBUS = 5V, VBAT = 3.5V
Charge Mode Overload Operation
VBUS = 5 V, VBAT = 2.6 V, Voreg = 4.2 V,
ICHG = 1550 mA
VBUS = 5 V at 8 mA, VBAT = 3.2V,
Iin_limit = 100 mA, ICHG = 550 mA
October, 20, 2011. Techcode Semiconductor Limited www.techcodesemi.com
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11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet TD9157.PDF ] | |
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