SMPS controller. MD1801 Datasheet

MD1801 controller. Datasheet pdf. Equivalent


MIX-DESIGN MD1801
MD1800/01 Datasheet
High performance primary side regulator (PSR) offline switch
power supply (SMPS) controller
PRODUCT DESCRIPTION
MD180X is high performance primary sensing regulator (PSR) and monolithic switch power controller which is designed for
small-power supply equipment with current mode control. Built-in accurate CV/CC control circuit, eliminates optocoupler, TL431
and its related loop devices. High integration design, a high performance power BJT and PFM controller and all kinds of
protection circuits in one chip, to minimize the peripheral components to save the cost greatly.
MD180X can be simply designed a typical flyback switch converter, the unique driving technology promotes the characteristics
of withstand voltage and achieves excellent converting efficiency.
FEATURES
◆ Built-in 700V@MD1800; 810V@MD1801 power BJT.
◆ PSR control, eliminates optocoupler and TL431
◆ Accurate CV/CC control
◆ Hysteresis over-temperature protection (OTP) circuit
◆ Higher efficiency and meet Level 6 efficiency standards
◆ Output voltage protection (OVP/UVP)
◆ < 100 mW no-load consumption
◆ Auto-Restart function
◆ Ultra-low start-up current
◆ Good EMC characteristic allows the simple EMC circuit
APPLICATIONS
◆ Intelligent mobile phone/small size tablet computer
◆ Digital cameras and other small digital products
◆ Power adapters for network products etc.
◆ RCC solutions Replace.
S Packge(SOIC-7 )
Figure1Packgediagram
Output Power Table
90Vac-265Vac
P/N Package
Adapter
OpenFrame
MD1800 S 4W
5W
MD1801 S 5W
5.5W
Notes:
1. Continuous maximum output power is tested in typical non-ventilated closed adapter
measured at environment temperature + 40 ℃.
2. The biggest actual continuous output power is tested in the condition of that peripheral
circuit is designed properly and enough space for heat dissipation.
◆ Package: S: SOP - 7; P: DIP-8
APPLICATION DIAGRAM
MD1800/01
ProductDatasheet
©MIX-DESIGNSemiconductorLtd@2013
Page1
Output CC/CV VI Characteristic
10-Mar-2013@Rve.02
MIX-PD-155787


MD1801 Datasheet
Recommendation MD1801 Datasheet
Part MD1801
Description High performance primary side regulator (PSR) offline switch power supply (SMPS) controller
Feature MD1801; MD1800/01 Datasheet High performance primary side regulator (PSR) offline switch power supply (SMPS).
Manufacture MIX-DESIGN
Datasheet
Download MD1801 Datasheet




MIX-DESIGN MD1801
MD1800/01 Datasheet
Highperformanceprimarysideregulator(PSR)offlineswitch
powersupply(SMPS)controller
PINOUT CONFIGURATION 
Figure2.PinConfigurationofMD1800/01(Topview)
PIN Function Description
Pin #
4
Name
Function Description
Conntect external primary current sensing resistor RCS, the controller can detect the
CS primary current through the external sens resistor. When the voltage on the resistor
achieves the maximum value, the internal power BJT will be turn off immediately.
3
CPC
to connect with a 100+nf capacitor, the pin will become output cable drop
compensation pin.
1
2
5-6
VCC
FB
HV
Power supplying pin of the controller, In order to let the controller gain more stable
supply voltage, the external filter capacitor must use low equivalent impedance (Low
ESR) of the electrolytic capacitor.
Output feedback pin, to detect the output condition through the auxiliary winding voltage
of the transformer.
To connect the collector of internal power BJT
8
GND
The referring grounding pin of the controller
ProductDatasheet
©MIX-DESIGNSemiconductorLtd@2013
Page2
10-Mar-2013@Rve.02
MIX-PD-155787



MIX-DESIGN MD1801
MD1800/01 Datasheet
Highperformanceprimarysideregulator(PSR)offlineswitch
powersupply(SMPS)controller
FUNCTIONAL BlOCK DIAGRAM 
Figure3.FunctionalblockdiagramofMD1800/01
ProductDatasheet
©MIX-DESIGNSemiconductorLtd@2013
Page3
10-Mar-2013@Rve.02
MIX-PD-155787







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