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參數(shù)資料
| 型號： | HA16141P |
| 廠商： | Hitachi,Ltd. |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | PFC and PWM Controller |
| 中文描述： | PFC和PWM控制器 |
| 文件頁數(shù)： | 11/19頁 |
| 文件大小： | 265K |
| 代理商： | HA16141P |
HA16141P/FP, HA16142P/FP
Rev.4, Sep. 2001, page 11 of 18
3. PFC controller status
PFC-ON
PFC-FB
1.2V
Notes: 1.
2.
3.
All numeric values in the figure are typical values.
PFC-ON
The HA16141P/FP can perform on/off control of the PFC function using the PFC-ON pin.
If an AC voltage that has undergone primary rectification and has been divided with an external resistance is input,
PFC stoppage is possible in the event of a low input voltage.
On/off control by means of a logic signal is also possible.
PFC-FB
The input to this pin is the voltage obtained by dividing the stepped-up PFC output voltage.
The pin voltage is fed back to the PFC control system, and is also used for step-up voltage logic decisions.
This is outlined in the figure below.
2.34V
Precondition: VREF GOOD, Non latched.
1.5V
PG
PFC-OUT
2.75V
2.60V
1.5V
1.70V
2.34V
1.2V
PG signal high due to
low PFC-FB voltage
Normal
operation
PFC pulses stopped due to
high PFC-FB voltage
(overshoot prevention)
PFC pulses stopped
by PFC-ON,
and PG signal high
2.34V
2.75V
2.60V
1.70V
Hysteresis
Hysteresis
PFC-OUT pulse stoppage
(Reduction of step-up voltage overshoot)
PG
(Power Good) signal is output
Feedback voltage
2.50V
(Note 3 is continued on the next page)
PFC pulses stopped
by PFC-ON,
and PG signal high
PFC pulses stopped
by PFC-ON,
and PG signal high
PG signal high due to
low PFC-FB voltage
Normal
operation
Normal
operation
Normal
operation
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