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参数资料
| 型号： | RP502L081B-TR |
| 厂商： | RICOH COMPANY LTD |
| 元件分类： | 稳压器 |
| 英文描述： | SWITCHING REGULATOR, 3960 kHz SWITCHING FREQ-MAX, PDSO6 |
| 封装： | 1.60 X 1.60 MM, HALOGEN FREE AND ROHS COMPLIANT, DFN-6 |
| 文件页数： | 7/30页 |
| 文件大小： | 1222K |
| 代理商： | RP502L081B-TR |
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RP502x
15
TIMING CHART
(1) Soft-Start Time
In the case of starting the ICs with CE
The ICs start to operate when the CE pin voltage (VCE) exceeds the threshold voltage. The threshold voltage
is set between CE “H” input voltage (VCEH) and CE ”L” input voltage (VCEL).
When the ICs start to operate, the soft-start circuit also starts to operate. After a certain period of time, the
reference voltage (VREF) of the inside the ICs gradually rise up to the specified value.
VCEH
Soft-start Time
IC Internal Voltage
Reference
VCEL
Threshold Level
LX Voltage
(VCE)
(VREF)
Soft-Start Circuit
starts to operate
(VLX)
Influences by Power supply,
Load Current, External Components
(VOUT)
Output Voltage
CE Pin
Input Voltage
Operate with PWM mode
during the Soft-start Time
Soft-start time is the time period from when the soft-start circuit started to when the reference voltage
reached to the specified value.
Soft-start time may not always equal to the actual start-up time of DC/DC converter.
Start-up peed could be affected by the power supply capacity, the output current value, the inductor value
and capacitor value.
In the case of starting with power supply
After starting up with power supply, the ICs starts to operate when the input voltage (VIN) exceeds the
UVLO released voltage (VUVL02). The soft-start circuit starts to operate and then the reference voltage (VREF)
of the inside the ICs gradually rise up to the specified value.
Soft-start time is the time period from when the soft-start circuit started to when the reference voltage
reached to the specified value.
Output Voltage
Input Voltage
VUVLO2
IC Internal Voltage
Reference
VUVLO1
LX Voltage
Set VOUT
Soft-start Time
Influences by Power supply,
Load Current, External Components
Operate with PWM mode during the Soft-start Time
(VOUT)
(VIN)
(VREF)
(VLX)
The start-up speed of the output voltage could be affected by the following elements.
(a) The start-up speed of the input voltage (VIN), which is determined by the power supply for the ICs and
also by the input capacitor (CIN).
(b) The output capacitor (COUT) value and the output current value.
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相关代理商/技术参数 |
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| RP502U | 制造商:n/a 功能描述:ALLEN BRADLEY S7C8A |
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| RP50-4805SBP | 制造商:RECOM 制造商全称:Recom International Power 功能描述:50 Watt Single Output |
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