3W开关电源制作完全资料2(电路图PCB图BOM变压器及测试报告)
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RM3252 Application Information RM3252Application Information
--5V_600mA
陕西亚成微电子有限责任公司
技术支持部
2010.10
201010
1RM3252Introduction
1.RM3252 Introduction
2.Electronical Characteristic Description
A li ti Ci it
3.Application Circuit
4.BOM List
5.Transformer Parameter
6.Test Report
The RM3252 switch Intergard Circuit cost effectively replace all power supplies,and up to 5W output power based on unregulated isolated linear transformer
(50/60HZ). Unlike conventional PWM (pulse width modulation) controllers, they
regulate the output voltage in a new method of off-time modulation control. The
controller consists of a VCO (voltage control oscillator), Sense and logic circuit, VDD controller consists of a VCO (voltage control oscillator) Sense and logic circuit VDD
pin, under-voltage lockout circuit, protection for over-voltage, current limited circuit,
leading edge blanking, over load protection and fault condition auto-restart. They are
ideal low power AC/DC adapter/charger solution for portable devices.
Package Function Description
PIN1:NC Not Connected
PIN 1: NC Not Connected
PIN 2: GND Ground
PIN 3: Sense Current sensor,it senses the voltage via a
sensed resistor
PIN 4: NC Not Connected
PIN4NC N C d
PIN 5: Vout Gate drive output for the external power BJT
switch.
PIN 6: VDD Power Supply
Item Conditions MIN.TYP.MAX.Unit Supply Voltage
Operation Voltage21V Turn-on Threshold Voltage VDD ON111213V Turn-off Threshold Voltage VDD OFF 5.56 6.5V Over-voltage Thershold Vovp2830V Oscillator
455055KHZ Operation Frequency
Current Sensing
Leading Edge Blanking250300350nS Leading Edge Blanking
VDD=15V0.450.50.55V Current Sense Detection
Voltage
1
2
4
D1-D4
AC--IN
L1
3
+
C2
+
C1
F1
N
R7
R9
R1
RM3252
R?
R2
NC 1GND 2Sense 3
NC
Vdd Vout Component_1
RM3252 5V_500mA
变压器参数
12
3
4
Lp=5.0mH;core:PC40 EE16 卧式
Description MIN
TPY
MAX Test Data Result
Input
Voltage
90V 265V 85V-265V
PASS
Frequency
50Hz
60Hz
Output
Voltage 465V 535V 493V-515V PASS Current Load regulation
Power
4.65V 500mA -7%
5V 2.5W
5.35V 7%
4.93V-
5.15V 4.27%
2.495W
PASS PASS PASS
Efficiency
Energy Star(5)
68.46%(avg.)
PASS