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PDF UB264A Data sheet ( Hoja de datos )
| Número de pieza | UB264A | |
| Descripción | LION BATTERY PROTECTION IC | |
| Fabricantes | Unisonic Technologies | |
| Logotipo |  |
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UNISONIC TECHNOLOGIES CO., LTD
UB264A
Preliminary
LION BATTERY PROTECTION
IC FOR 2-SERIAL, 3-SERIAL,
OR 4-SERIAL-CELL PACK
(SECONDARY PROTECTION)
DESCRIPTION
The UTC UB264A 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 UB264A 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 control function via CTL pin
* CMOS output active “H”
* Wide operating voltage range 3.6V to 24V
* Wide operating temperature range −40°C ~ +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
UB264AL-P08-R
UB264AG-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-R502-832.A
Free Datasheet http://www.Datasheet4U.com
1 page  
UB264A
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 voltages 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,
CO will become “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 UB264A Series, the CTL pin takes
precedence over the overcharge detection circuit.
Note:
CTL PIN
CO PIN
“H” Normal state (Note 1)
Open
“H”
“L” “H”
“L”→ “H”
-
“H” →“L”
-
1. The state is controlled by the overcharge detection circuit.
Notes: 1. The reverse voltage “H” to “L” or “L” to “H” of CTL pin is VDD pin voltage −2.8V (Typ.), does not have
the hysteresis.
2. Since the CTL pin implements high resistance of 8MΩ to 12MΩ for pull down, be careful of external
noise application. If an external noise is applied, CO may become “H”. Perform thorough evaluation
using the actual application.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
5 of 10
QW-R502-832.A
Free Datasheet http://www.Datasheet4U.com
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| PDF Descargar | [ Datasheet UB264A.PDF ] | |
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