參數(shù)資料
型號(hào)： UPD168103AK9-5B4-A
廠商： NEC Corp.
英文描述： 5-CHANNEL OPERATIONAL AMPLIFIER, IRIS DRIVER, AND 4-CHANNEL H-BRIDGE DRIVER
中文描述： 5通道運(yùn)算放大器，光圈驅(qū)動(dòng)器和4通道H橋驅(qū)動(dòng)器
文件頁(yè)數(shù)： 7/20頁(yè)
文件大?。?/td> 233K
代理商： UPD168103AK9-5B4-A
Data Sheet S17655EJ1V0DS
7
μ
PD168103A
4. FUNCTIONAL DEPLOYMENT
4.1 Undervoltage Lockout (UVLO) Circuit
This function is to forcibly stop the operation of the
μ
PD168103A to prevent malfunctioning if LV
DD
drops.
When UVLO operates, the driver output and amplifier circuit are the OFF status.
The UVLO circuit detects a voltage drop if LV
DD
drops to 1.7 V TYP. in the non-reset status (RESETB = H). In the
reset status (RESETB = L), it detects a voltage drop if LV
DD
drops to 0.6 V TYP. This circuit may not operate if the
LV
DD
voltage abruptly drops for just a few
μ
s.
4.2 Overheat Protection (TSD) Circuit
This function is to forcibly stop the operation of the driver output to protect it from destruction due to overheating if
the chip temperature of the
μ
PD168103A rises.
The overheat protection circuit operates when the chip temperature rises to 150
°
C or more. When overheat is
detected, the driver output is stopped.
When RESETB = L (the reset status) or when UVLO is detected, the overheat protection circuit does not operate.
4.3 Power Up Sequence
The
μ
PD168103A has a circuit that prevents current from flowing into the V
M
, V
SHUTTER
and V
IRIS
pins (from the next,
these are written as the motor power supply pins) when LV
DD
= 0 V or AV
DD
= 0 V. Therefore, the current that flows
into the motor power supply pins are cut off when LV
DD
= 0 V.
Because the LV
DD
pin voltage, the AV
DD
pin voltage and the motor power supply pins voltage are monitored, a
current of 1
μ
A TYP. flows into each one of the motor power supply pins when LV
DD
is applied.
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