in this video i explained circuit explanation of Switch Mode Power Supply Circuit using HT2263 SMPS Controller. HT2263 is a smd smps controlller, this circuit is using C106MG and SE432L adjustable zener regulator for making input voltage switching circuit. SCR is used to switch the negative line to primary main bulk capacitor. so at a specific violtage level the voltage level sensor circuit which is composed of SE432L is activated and causes to switch the voltage to main capacitor and that time
HT2263 is a highly integrated current mode PWM control IC optimized for high performance, low standby power and cost effective offline flyback
converter applications up to 30W range.
PWM switching frequency at normal operation is externally programmable and trimmed to tight range. At no load or light load condition, the IC operates in extended ‘burst mode’ to minimize switching loss. Lower standby power and higher conversion efficiency is thus achieved. VDD low startup current and low operating current contribute to a reliable power on startup design with HT2263. A large value resistor could thus be used in the startup circuit to minimize the standby power. The internal slope compensation improves system large signal stability and reduces the
possible sub-harmonic oscillation at high PWM duty cycle output. Leading-edge blanking on current sense(CS) input removes the signal glitch due to snubber circuit diode reverse recovery and thus greatly reduces the external component count and system cost in the design. HT2263 offers complete protection coverage with automatic self-recovery feature including
Cycle-by-Cycle current limiting (OCP), over load protection (OLP), VDD over voltage clamp and under voltage lockout (UVLO). The Gate-drive output is clamped to maximum 18V to protect the power MOSFET. Excellent EMI performance is achieved with frequency shuffling technique together with soft switching control at the totem pole gate drive output.
Tone energy at below 20KHZ is minimized in the design and audio noise is eliminated during operation. HT2263 is offered in SOT23-6, SOP-8
and DIP-8 packages.
Extended Burst Mode Control For Improved
Efficiency and Minimum Standby Power Design.
Audio Noise Free Operation
External Programmable PWM Switching Frequency
Internal Synchronized Slope Compensation
Low VDD Startup Current and Low Operating Current (1.4mA)
Leading Edge Blanking on Current Sense Input
Good Protection Coverage With Auto Self-Recovery
VDD Over Voltage Clamp and Under Voltage Lockout with Hysteresis (UVLO)
Gate Output Maximum Voltage Clamp (18V)
Line Input Compensated Cycle-by-Cycle Over-current Threshold Setting For Constant
Output Power Limiting Over Universal Input Voltage Range.
Overload Protection (OLP)
Offline AC/DC flyback converter for
Battery Charger
Power Adaptor
Set-Top Box Power Supplies
Open-frame SMPS
in Mobile Battery Charger Circuit using HT223 SMPS PWM IC, it is switching mode power supply used to charge cellular batteries. smps concept and troubleshooting repairing or understanding repair switching mode power supply basics and working principle
1 basic working concept of smps switch mode power supply
2. how PWM pulse width modulator work
3. circuit diagram of #smps switch mode power supply mobile battery charger
4. practical circuit tracing of #smps mobile battery charger
5 how to repair mobile charger
6 different faults in stages of smps
7. what is optocoupler or opto-isolator and what is its function in #feedback circuit
8 what is voltage regulation and how it workks in SMPS
9 HT2263 datasheet pinout
and much more
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