UB2012AG-S08-R(2010) 查看數據表（PDF） - Unisonic Technologies

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UB2012AG-S08-R
(Rev.:2010)

ADVANCED LINEAR CHARGE MANAGEMENT IC FOR SINGLE AND TWO-CELL LITHIUM-ION AND LITHIUM-POLYMER

Unisonic Technologies 

UB2012

Preliminary

LINEAR INTEGRATED CIRCUIT

„ 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

COMP

BAT

CC

VCC

VSS

TS

STAT

Host

Processor

OUT

IN

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.

UNISONIC TECHNOLOGIES CO., LTD

www.unisonic.com.tw

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