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參數(shù)資料
| 型號(hào)： | HA16163T |
| 廠商： | Renesas Technology Corp. |
| 英文描述： | Synchronous Phase Shift Full-Bridge Control IC |
| 中文描述： | 同步移相全橋控制IC |
| 文件頁數(shù)： | 11/30頁 |
| 文件大?。?/td> | 294K |
| 代理商： | HA16163T |
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HA16163T
Rev.5.0, Mar.15.2004, page 11 of 29
Functional Description
Note: All voltage, current, time shown in the diagram is typical value unless otherwise noted.
UVLO
UVLO (Under Voltage Lockout Operation) is a function that halts operation of the IC in the event of a low IC power
supply voltage.
When IC operation is halted, the 5 V internal voltage generation circuit (VREF) halts, and therefore operation of
circuitry using VREF as the operating power supply halts. Circuit blocks other than UVLO use VREF as their
operating power supply. Therefore, the power supply current of the IC becomes equal to the current dissipated by the
UVLO circuit. The following graphs show the relationship between the VCC input current and VCC input voltage, and
between VREF and the VCC input voltage.
ICC
VCC
VCC
ICC
5V
Is
0
7.9V
9.8V
20V
8.5V
12V
0
7.9V
9.8V
20V
VREF
Figure 1
REMOTE
IC outputs (OUT-A through OUT-F) can be halted by means of the REMOTE pin. In this case, the IC output logic
level is low.
In the remote off state, VREF output is not halted, and therefore the current dissipation of the IC does not decrease to
the start-up level. Also, control by means of the REMOTE pin is not possible when the IC has been halted by UVLO.
The soft start capacitance is discharged in the remote off state. Therefore, operation begins from soft start mode when
the next remote on operation is performed. The relationship between the REMOTE pin and the operating mode of the
IC is shown in the following figure.
REMOTE
ON
OFF
1.333V
0V
1.417V
5V
IC operating
mode
Figure 2
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