小电源制作全套资料(电路图PCB图BOM变压器及测试报告)
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RM3252 Application Information
5V700A
--5V_700mA
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
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 U lik ti l PWM (l idth d l ti) t ll th l t th t t
voltage in a new method of off-time modulation control. The controller consists of a VCO
(g),g,p,g, (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-on Threshold Voltage VDD ON
Turn-off Threshold Voltage VDD OFF 5.56 6.5V
Over-voltage Thershold Vovp2830V
Oscillator
455055KHZ Operation Frequency
Current Sensing
Leading Edge Blanking
Leading Edge Blanking250300350nS
VDD=15V0.450.50.55V Current Sense Detection
Voltage
1
L
2
4
D1-D4
AC--IN
L1
3
+
C2
+
C1
F1
N
R7
R9
R1
1RM3252
R?
R2
NC GND 2Sense 3
NC
Vdd Vout Component_1
RM3252 5V_700mA
12
3
4
5
2to1 160T 0.21mm
三层绝缘胶纸
一层铜箔 0.9T
三层绝缘胶纸
Lp=5.0mH;core:PC40 EE16 卧式
Description MIN
TPY
MAX Test Data Result
Input
Voltage
Frequency
90V 50Hz
265V 60Hz
85V-265V
PASS
Output
Voltage Current Load regulation
4.65V 500mA -7%
5V 35W 5.35V 7%
4.99V-
5.30V
5.85%
354W PASS
PASS PASS Power
3.5W
3.54W
PASS
Efficiency
Energy Star(5)70.45%(avg.)PASS
gy ()
(g )。