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PDF UB2016 Data sheet ( Hoja de datos )
| Número de pieza | UB2016 | |
| Descripción | ONE-CELL STANDALONE LINEAR LITHIUM BATTERY CHARGER | |
| Fabricantes | Unisonic Technologies | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de UB2016 (archivo pdf) en la parte inferior de esta página. Total 13 Páginas | ||
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UNISONIC TECHNOLOGIES CO., LTD
UB2016
Preliminary
ONE-CELL STANDALONE
LINEAR LITHIUM BATTERY
CHARGER
CMOS IC
DESCRIPTION
UTC UB2016 is a complete, constant current and constant voltage
linear charger for single cell lithium-ion batteries. Its small size and
ability to regulate low charge currents make UTC UB2016 especially
well-suited for portable applications using low capacity rechargeable
lithium-ion coin cells. Furthermore, UTC UB2016 is specifically
designed to work within USB power specifications.
No external sense resistor is needed, and no blocking diode is
required due to the internal MOSFET architecture. The charge
voltage is fixed at 4.2V, and the charge current can be programmed
externally with a single resistor. UTC UB2016 automatically
terminates a charge cycle when the charge current drops to 1/10th
the programmed value after the final float voltage is reached.
FEATURES
* Programmable Charge Current Up to 500mA.
* No External MOSFET, Sense Resistor or Blocking Diode Required.
* Complete linear charger in ThinSOT Package for Single Cell / Coin Cell Lithium-lon Batteries.
* Constant Current / Constant Voltage Operation with Thermal Regulation to Maximize Charge Rate Without Risk
of Overheating.
* Charges Single Cell Li-lon Batteries Directly form USB Port.
* Preset 4.2V Charge Voltage with High Accuracy about ±1.2%.
* Automatic Recharge.
* 2.9V Trickle Charge Threshold.
* 20µA Supply Current in Shutdown Mode.
* Charge Status Output Pin.
ORDERING INFORMATION
Ordering Number
Lead Free
Halogen Free
UB2016L-xx-AF5-R
UB2016G-xx-AF5-R
Note: xx: Output Voltage, refer to Marking Information.
Package
SOT-25
Packing
Tape Reel
UB2016G-xx-AF5-R
(1)Packing Type
(2)Package Type
(3)Output Voltage Code
(4)Halogen Free
(1) R: Tape Reel
(2) AF5: SOT-25
(3) xx: Refer to Marking Information
(4) G: Halogen Free, L: Lead Free
www.unisonic.com.tw
Copyright © 2012 Unisonic Technologies Co., Ltd
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UB2016
Preliminary
CMOS IC
ELECTRICAL CHARACTERISTICS(Cont.)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN TYP MAX UNIT
VCC–VBAT Lockout Threshold Voltage
VASD
VCC from Low to High
VCC from High to Low
100 mV
30 mV
C/10 Termination Current Threshold
PROG Pin Voltage
ITERM
VPROG
RPROG=10k (Note2)
RPROG=2k
RPROG=10k, Current Mode
0.1 mA/mA
0.1 mA/mA
0.8 1.0 1.2 V
CHRG Pin Weak Pull-Down Current
ICHRG VCHRG=3V
15 μA
CHRG Pin Output Low Voltage
Recharge Battery Threshold Voltage
VCHRG ICHRG=5mA
ΔVRECHRG VFLOAT-VRECHRG
0.6 V
100 mV
Thermal Protection Temperature
TLIM
120 °С
Soft-Start Time
Recharge Comparator Filter Time
tSS IBAT=0 to 1000V/RPROG
tRECHARGE VBAT High to Low
100 μs
1 ms
Termination Comparator Filter Time
tTERM
1000
μs
PROG Pin Pull-Up Current
IPROG
1 μA
Notes: 1. Supply current includes PROG pin current (approximately 100μA) but does not include any current
delivered to the battery through the BAT pin (approximately 100mA).
2. ITERM is expressed as a fraction of measured full charge current with indicated PROG resistor.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
5 of 13
QW-R502-869.a
Free Datasheet http://www.Datasheet4U.com
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UB2016
Preliminary
APPLICATION INFORMATION(Cont.)
CMOS IC
Reverse Polarity Input Voltage Protection
In some applications, protection from reverse polarity voltage on VCC is desired. If the supply voltage is high
enough, a series blocking diode can be used. In other cases, where the voltage drop must be kept low a P-channel
MOSFET can be used.
Fig. 4 Low Loss Input Reverse Polarity Protection
USB and Wall Adapter Power
The UTC UB2016 allows charging from both a wall adapter and a USB port. Fig. 5 shows an example of how to
combine wall adapter and USB power inputs. A P-channel MOSFET, MP1, is used to prevent back conducting into
the USB port when a wall adapter is present and a Schottky diode, D1, is used to prevent USB power loss through
the 1kΩ pull-down resistor. Typically a wall adapter can supply more current than the 500mA-limited USB port.
Therefore, an N-channel MOSFET, MN1, and an extra 10kΩ program resistor are used to increase the charge
current to 600mA when the wall adapter is present.
Fig. 5 Combining Wall Adapter and USB Power
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
11 of 13
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11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet UB2016.PDF ] | |
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