5V700mA电源制作完全资料(电路图PCB图BOM变压器及测试报告)
陕西亚成微电子有限责任公司
技术支持部
2010.10
1RM3253Introduction
1.RM3253 Introduction
2.Electronical Characteristic Description
A li ti Ci it
3.Application Circuit
4.BOM List
5.Transformer Parameter
6.Test Report
The RM3253 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 ll i f VCO (l l ill) S d l i i i 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,
g g g,p y leading edge blanking, over load protection and fault condition auto-restart. They are ideal low power AC/DC adapter/charger solution for portable devices, otherwise,its Built-in 800V high voltage BJT and minimal external componets.
Package Function Description
PIN 1: VDD Power Supply
PIN 2: NC Not Connected
PIN2:NC Not Connected
PIN 3: Sense Current sensor,it senses the voltage via a
sensed resistor
PIN 4: OE Emmiter Pin of the power BJT switch.
PIN 5、6: OC Output Pin( Connect to switching
transformer)
PIN 7、8: GND Ground
Item Conditions MIN.TYP.MAX.Unit Supply Voltage
Operation Voltage21V Turn-on Threshold Voltage VDD ON111213V
VDD OFF 5.56 6.5V Turn-off Threshold
Voltage
Over-voltage Thershold Vovp2830V Oscillator
455055KHZ Operation Frequency
Current Sensing
L di Ed Bl ki S Leading Edge Blanking250300350nS
VDD=15V0.450.50.55V Current Sense Detection
Voltage
L
1
2
4
D1-D4
AC--IN
L1
3
+
C2
+
C1
F1
N
R1
R2
R11C4
R5
R3
12
层绝缘胶纸
3
4
5
三层绝缘胶纸
一层铜箔 0.9T
三层绝缘胶纸L 50H PC40EE16Lp=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 4.65V 5V 5.35V 5.00V-5.25V
PASS Current Load regulation
Power
600mA -7%
3.5W
7%
4.35%3.58W
PASS PASS PASS
Efficiency
Energy Star(5)
71.88%(avg.)
PASS