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參數(shù)資料
| 型號： | HA16158FP |
| 廠商： | Renesas Technology Corp. |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | PFC & PWM Control IC |
| 中文描述： | 功率因數(shù)校正 |
| 文件頁數(shù)： | 13/23頁 |
| 文件大?。?/td> | 236K |
| 代理商： | HA16158FP |
HA16158P/FP
Rev.0, Aug. 2002, page 13 of 23
3. Soft Start Circuit (for PFC Control)
This function gradually increases the pulse width of the PFC-OUT pin from a 0% duty cycle at start-up to
prevent a sudden increase in the pulse width that may cause problems such as transient stress on external
parts or overshoot of the PFC output voltage (B+ voltage).
The soft start time can easily be set with a single external capacitance.
V_ramp
(internal signal)
PFC-SS
comp. out
(internal signal)
PFC-OUT
3.4V
V_PFC-SS
Figure 3
Soft start time tss-pfc is determined by PFC-SS pin connection capacitance Css-pfc and an internal
constant, and can be estimated using the equation shown below.
Soft start time tss-pfc is the time until the PFC-SS pin voltage reaches lower-end voltage 0.65 V of the IC-
internal RAMP voltage waveform after VREF starts up following UVLO release.
Soft start time tss-pfc when Css-pfc is 3.3 nF is given by the following equation.
tss-pfc =
* Iss-pfc: PFC-SS pin sink current, 25
μ
A typ.
≈
5.7 [ms]
=
Css-pfc
×
(VREF
–
Vramp-L)
Iss-pwm
33 [nF]
×
(5
–
0.65)
25 [
μ
A]
In addition, when you do not use a soft start function, please ground this terminal.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| HA16158FP-E | 制造商:Renesas Electronics 功能描述:PFC and PWM Control IC 16-Pin SOP 制造商:Renesas Electronics 功能描述:PFC and PWM Control IC 16-Pin SOP Cut Tape |
| HA16158P | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:PFC & PWM Control IC |
| HA16158P/FP | 制造商:未知廠家 制造商全稱:未知廠家 功能描述: |
| HA16158P_07 | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:PFC & PWM Control IC |
| HA16163T | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:Synchronous Phase Shift Full-Bridge Control IC |
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