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參數(shù)資料
| 型號(hào)： | TPS65552ADGQRG4 |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類(lèi)： | 穩(wěn)壓器 |
| 英文描述： | 3 A BATTERY CHARGE CONTROLLER, PDSO10 |
| 封裝： | GREEN, POWERPAD, PLASTIC, MSOP-10 |
| 文件頁(yè)數(shù)： | 17/20頁(yè) |
| 文件大小： | 621K |
| 代理商： | TPS65552ADGQRG4 |
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PRODUCT
PREVIEW
PRINCIPLES OF OPERATION
CHG
(VOUT)
XFULL
F_ON
G_IGBT
(ENA)
TimeA
TimeB
TimeC
TimeD
TimeE
TimeF
TimeG
TimeH
TimeI
TimeJ
Start/Stop Charging
Indicate Charging Status
TPS65552A
SLVS567 – JULY 2005
Figure 4. Whole Operation Sequence Chart
TPS65552A has one internal enable latch, F1, that holds a charge (ON/OFF status) of the device. See Figure 2.
The only way to start charging is to input CHG
↑ (see time A/C/H in Figure 4). Each time CHG↑ is reached, the
TPS65552A starts charging.
There are three trigger events to stop charging:
1. Forced stop by inputting CHG = L from the controller (see timeB in Figure 4).
2. Automatic stop by detecting full charge. VOUT reaches the target value (see TimeD in Figure 4).
When the charging operation is completed, the TPS65552A drives the charge completion indicator pin, XFULL,
to GND. XFULL is an open-drain type output. When connecting the indicator LED to XFULL, the LED lights are
on when fully charged. The controller detects the status of the device as a logic signal when connecting a pullup
resister, R1 (see Figure 1).
XFULL enables the controller to detect the over VDS protection status using software time. If over VDS protection
occurs, XFULL never goes L during CHG = H, provided that the timer that starts at CHG
↑ stops at XFULL↑, and
times out within a designed period of maximum charging times. The controller can detect over VDS at time out.
The device starts charging at timeH, and over VDS protection occurs at TimeI (see Figure 4). At timeI, XFULL
stays H, and the controller detects over VDS protection when the timer ends at timeJ. In this event, the controller
inputs CHG = L to terminate the operation.
6
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