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PDF UB264B Data sheet ( Hoja de datos )
| Número de pieza | UB264B | |
| Descripción | LION BATTERY PROTECTION IC | |
| Fabricantes | Unisonic Technologies | |
| Logotipo |  |
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UNISONIC TECHNOLOGIES CO., LTD
UB264B
Preliminary
LION BATTERY PROTECTION
IC FOR 2-SERIAL, 3-SERIAL,
OR 4-SERIAL-CELL PACK
(SECONDARY PROTECTION)
DESCRIPTION
The UTC UB264B Series is secondary protection IC for 2-, 3-, or
4-Cell lithium-ion rechargeable battery packs, and incorporates a
high-accuracy voltage detection circuit.
The UTC UB264B Series also includes a high accuracy delay
circuit for over voltage detection time without external capacitors.
FEATURES
* High-accuracy voltage detection circuit for each cell
* Overcharge detection voltage n (n=1 to 4): 4.30V to 4.80V (in
50mV steps)
* Overcharge hysteresis voltage n (n=1 to 4): -0.52V±0.21V,
−0.39V±0.16V, −0.26V±0.11V, −0.13V±0.06V, None
* Delay times for overcharge detection can be set by an internal
circuit without external capacitors
* Output latch function after overcharge detection
* CMOS output active “H”
* Wide operating voltage range 3.6V to 24V
* Wide operating temperature range −40°C to +85°C
* Low current consumption: 2.5μA typ. (+25°C) at 3.5V for
each cell
ORDERING INFORMATION
Note:
Ordering Number
Lead Free
Halogen Free
UB264BL-P08-R
UB264BG-P08-R
xx: SERIAL CODE, refer SERIAL CODE LIST.
Package
TSSOP-8
CMOS IC
Packing
Tape Reel
www.unisonic.com.tw
Copyright © 2012 Unisonic Technologies Co., Ltd
1 of 10
QW-R502-833.A
Free Datasheet http://www.Datasheet4U.com
1 page  
UB264B
Preliminary
CMOS IC
OPERATING
1. Overcharge Detection
Under normal conditions, when the voltage of any one cell battery exceeds the overcharge detection voltage (VCU)
during charging, and after the state is retained for the overcharge detection delay time (tCU), CO will become “H”.
This state is called overcharge. Attaching FET to the CO pin provides charge control and a second protection.
Only the voltage of all the batteries decreases below the total of the overcharge detection voltage (VCU) and the
overcharge hysteresis voltage (VHC) and the state is retained for the overcharge release delay time (tCL) or longer,
the overcharge status is released; however, CO stays at “H”. When the CTL pin is switched from “L” to “H”, CO
becomes “L”.
2. Overcharge Timer Reset
When an overcharge release noise that forces the voltage of the battery temporarily below the overcharge
detection voltage (VCU) is input during the overcharge detection delay time (tCU) from when VCU is exceeded to when
charging is stopped, tCU is continuously counted if the time the overcharge release noise persists is shorter than the
overcharge timer reset delay time (tTR). Under the same conditions, if the time the overcharge release noise persists
is tTR or longer, counting of tCU is reset once. After that, when VCU has been exceeded, counting tCU resumes.
3. CTL Pin
The CTL pin is used to control the output voltage of the CO pin. In the UTC UB264B Series, when the CTL pin is
switched from “L” to “H”, a reset signal is output to the overcharge detection latch and CO becomes “L”.
CTL PIN
CO PIN
“H” Without latch
Open
Normal state (Note 1)
“L” Normal state (Note 1)
“L”→ “H”
Latch reset (Note 2)
“H” →“L”
-
Notes: 1. The state is controlled by the overcharge detection circuit.
2. Latch reset becomes effective when the voltages of all the
batteries are lower than the total of the overcharge detection
voltage (VCU) and the overcharge hysteresis voltage (VHC) and the
overcharge release delay time (tCL) has elapsed.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
5 of 10
QW-R502-833.A
Free Datasheet http://www.Datasheet4U.com
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| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet UB264B.PDF ] | |
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