Introduction of
Series ME-YYAYY
Post Regulation
Voltage
Stabilizing
Circuit
Ⅰ.General
Description：
The series of ME-YYAYY self-adaptive Post
Regulation Voltage Stabilizing Circuit is
produced by Wrangler International (shenzhen)
CO.LTD. It can be used in multi-output low
voltage DC switch power, and make all the output
circuits stable and credible. The package of
this circuit is DIP-8. High precision steady
voltage, low lost, small size, low energy
consumption and self-adaptive make sure every
single output voltage precisely stabilizes.
Furthermore, it requires no other drivers and
can work in isolated ground.
Ⅱ.Main Parameters:
*Maximum Operating Voltage:
30VDC；50VDC
(100VDC will coming soon);
*Operating Current: 1A、2A、3A Three
Types
*Adaptive Frequency Range:
10KHZ～200KHZ；
* Work
pattern: Self-adaptive PWM flyback
topology
*Precision of Constant Voltage:
±1%VO（requiring the precision of R1
be ±1%）；
*Output Voltage: Setting by the external
resistance R1 (the lowest output
voltage is 2.5V).
*Environment temperature：－20℃～85℃
*Other special parameters can meet
customers’ requirements.
ⅢTypical
application:
Note: This circuit is used in the
mode of self-adaptive PWM flyback
topology.
When using this circuit to design the
transformer parameters, adding secondary winding
turns based on conventional design can increase
the power by 0.8~1(add 80% when using
LDO),ensure working at the PWM state and get the
highest efficiency. For example, when the output
voltage is 20V before, design the output of the
transformer 40V, and using the LD0 design, the
output is 36V.
IV. Detailed Pin
Description(s)
|
Pin # |
Name |
Pin
Description |
Pin # |
Name |
Pin
Description |
|
1 |
HFAC |
High frequency AC
input |
2 |
VDN |
Rectifier
output |
|
3 |
NC |
Empty pin |
4 |
GND |
ground |
|
5 |
UK |
Voltage rectifier |
6 |
NC |
Empty pin |
|
7 |
UP |
Voltage adaptive R2 |
8 |
VOUT |
Voltage
output |
Note:
1. R1 is the voltage rectifier
resistor, the precision is 1%, the wattage is
1/4W to 1/2W
R1＝(VOUT－2.5)×103(Ω). For
example, when Vout is 10V, the
R1＝（10－2.5）×103（Ω）＝7.5×103（Ω）
2. R2 is the voltage adaptive resistor.
calculated on 120Ω/V，permission to±20%, the
wattage is 1/4W to 1/2W. if Vout is 10V, R2 is
10*120Ω=1200Ω
3. Pin2 is the output of current rectifier,
if no need, it can be hung
in the air, but it can not be connected with
other component.
V Production print
1.Brand:
2.Type introduction
For example : ME－1A－30 means that in this
post regulation voltage stabilizing circuit
the highest working voltage is 30V ,the
largest working current (the current when
working in full load) is 1A
3．Batch number: 0723 is the batch number of
the series of ME.
Ⅵ. Summary
The outward elements used in this circuit
are few. It successfully solved the difficult
problem about multi-output controlling in switch
power. For enlarging the using of switch power,
increasing the power index, reducing the cost,
meeting the requirements of the electronic
equipment instruments increasingly, it offered a
best choice, and it has extensive applied
market.
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