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PDF UB2017 Data sheet ( Hoja de datos )
| Número de pieza | UB2017 | |
| 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 UB2017 (archivo pdf) en la parte inferior de esta página. Total 13 Páginas | ||
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UNISONIC TECHNOLOGIES CO., LTD
UB2017
Preliminary
CMOS IC
ONE-CELL STANDALONE
LINEAR LITHIUM BATTERY
CHARGER
DESCRIPTION
UTC UB2017 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 UB2017 especially
well-suited for portable applications using low capacity rechargeable
lithium-ion coin cells. Furthermore, UTC UB2017 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 UB2017 automatically
terminates a charge cycle when the charge current drops to 1/10th
the programmed value after the final float voltage is reached.
54
6
1 23
SOT-26
FEATURES
* Programmable Charge Current Up to 500mA.
* No External MOSFET, Sense Resistor or Blocking Diode Required.
* Complete linear charger in Thin SOT 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.
* 25µA Max Supply Current in Shutdown Mode.
* Charge Status Output Pin.
ORDERING INFORMATION
Ordering Number
Lead Free
Halogen Free
UB2017L-xx-AG6-R
UB2017G-xx-AG6-R
Note: xx: Output Voltage, refer to Marking Information.
Package
SOT-26
Packing
Tape Reel
UB2017G-xx-AG6-R
(1)Packing Type
(2)Package Type
(3)Output Voltage Code
(4)Halogen Free
(1) R: Tape Reel
(2) AG6: SOT-26
(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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1 page  
UB2017
Preliminary
CMOS IC
ELECTRICAL CHARACTERISTICS (VCC=5V, TA=25°С, unless otherwise specified)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN TYP MAX UNIT
Input Supply Voltage
VCC
Charge Mode (Note 1), RPROG=10k
4.5 6.0 V
110 2000 μA
Input Supply Current
Regulated Output (Float) Voltage
BAT Pin Current
ICC
VFLOAT
IBAT
Standby Mode (Charge Terminated)
Shutdown Mode(RPROG Not
Connected, VCC<VBAT, or VCC<VUV)
IBAT=30mA, ICHRG=5mA
RPROG=10k, Current Mode
RPROG=2k, Current Mode
Standby Mode, VBAT=4.2V
Shutdown Mode (RPROG Not
Connected)
4.15
80
0
115
20
4.20
100
500
±1
±0.5
500
60
4.25
120
±6
±6
μA
μA
V
mA
mA
μA
μA
Trickle Charge Current
Trickle Charge Threshold Voltage
VCC Undervoltage Lockout Threshold
VCC Undervoltage Lockout Hysteresis
Manual Shutdown Threshold Voltage
ITRIKL
VTRIKL
VUV
VUVHYS
VMSD
Sleep Mode, VCC=0V
VBAT<VTRIKL, RPROG=10k
RPROG=10k, VBAT Rising
From VCC Low to High
PROG Pin Rising
PROG Pin Falling
±1 ±6
10
2.8 2.9 3.0
3.8
120
1.25
1.15
μA
mA
V
V
mV
V
V
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
ITERM
RPROG=10k (Note 2)
RPROG=2k
0.1 mA/mA
0.1 mA/mA
PROG Pin Voltage
VPROG RPROG=10k, Current Mode
0.8 1.0 1.2 V
CHRG Pin Weak Pull-Down Current ICHRG VCHRG=3V
15 μA
CHRG Pin Output Low Voltage
VCHRG ICHRG=5mA
0.6 V
Recharge Battery Threshold Voltage ΔVRECHRG VFLOAT-VRECHRG
100 mV
Thermal Protection Temperature
TLIM
120 °С
Soft-Start Time
tSS IBAT=0 to 1000V/RPROG
100 μs
Recharge Comparator Filter Time
tRECHARGE VBAT High to Low
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
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Free Datasheet http://www.Datasheet4U.com
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UB2017
Preliminary
CMOS IC
APPLICATION INFORMATION(Cont.)
USB and Wall Adapter Power
The UTC UB2017 allows charging from both a wall adapter and a USB port. Figure 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
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11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet UB2017.PDF ] | |
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