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參數(shù)資料
| 型號： | UB2012AG-S08-R |
| 廠商： | UNISONIC TECHNOLOGIES CO LTD |
| 元件分類： | 電源管理 |
| 英文描述： | POWER SUPPLY SUPPORT CKT, PDSO8 |
| 封裝： | HALOGEN FREE, SOP-8 |
| 文件頁數(shù)： | 4/17頁 |
| 文件大?。?/td> | 315K |
| 代理商： | UB2012AG-S08-R |
UB2012
Preliminary
LINEAR INTEGRATED CIRCUIT
UNISONICTECHNOLOGIESCO.,LTD
12 of 17
www.unisonic.com.tw
QW-R121-018 .b
APPLICATION INFORMATION(Cont.)
CHARGE INHIBIT FUNCTION
The TS pin can be used as charge-inhibit input. The user can inhibit charge by connecting the TS pin to VCC or
VSS (or any level outside the V(TS1) to V(TS2) thresholds). Applying a voltage between the V(TS1) and V(TS2) thresholds
to pin TS returns the charger to normal operation.
CHARGE STATUS INDICATION
The UTC UB2012 reports the status of the charger on the 3-state STAT pin. The following table summarized the
operation of the STAT pin.
CONDITION
STAT PIN
Battery conditioning and charging
High
Charge complete (Done)
Low
Temperature fault or sleep mode
Hi-Z
The STAT pin can be used to drive a single LED (Figure 1), dual-chip LEDs (Figure 4) or for interface to a host
or system processor (Figure 11). When interfacing the UTC UB2012 to a processor, the user can use an output port,
as shown in Figure 11, to recognize the high-Z state of the STAT pin. In this configuration, the user needs to read
the input pin, toggle the output port and read the STAT pin again. In a high-Z condition, the input port always
matches the signal level on the output port.
UTC
UB2012
SNS
BAT
VCC
TS
STAT
VSS
CC
COMP
OUT
IN
Host
Processor
Figure 9 Interfacing the UTC 2012 to a Host Processor
LOW-POWER SLEEP MODE
The UTC UB2012 enters the sleep mode if the VCC falls below the voltage at the BAT input. This feature
prevents draining the battery pack during the absence of VCC.
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