Part Number: TM0265, TMO265R
Function: Off-line switching power supply current mode control circuit
Package: DIP 8 in Type
Manufacturer: Titan Micro Electronics
Images:
Description
The TM0265R is an off-line current-mode switching power supply controller with an integrated 650V high-voltage POWERMOS, designed for compact and cost-effective AC-DC power conversion. It features programmable soft-start, adjustable operating current, automatic restart protection, low standby power consumption, and comprehensive protection functions to improve system reliability and efficiency. This IC is widely used in adapters, chargers, standby power supplies, home appliances, and other low-power offline SMPS applications.
Features
- Integrated 650V high-voltage POWERMOS
- Current-mode PWM control architecture
- User-defined soft-start function
- Operating current adjustable by an external resistor
- Input under-voltage protection (UVLO)
- Built-in thermal shutdown protection
- Integrated overload protection (OLP)
- Open-loop protection
- Automatic restart with over-voltage protection
- Frequency trimming for reduced EMI
- 100kHz switching frequency
- 72% maximum duty cycle
- Low standby power consumption compliant with EU requirements
- Simple application circuit with minimal external components
- Output current tolerance better than ±5%
Block Diagram
Absolute Maximum Ratings (Tc = 25 °C)
| Parameter | Symbol | Value | Unit |
| Integrated Power MOSFET Breakdown Voltage | VDSS | 650 | V |
| Switching Frequency | fSW | 100 | kHz |
| Maximum Duty Cycle | DMAX | 72 | % |
| Standby Switching Frequency | fSB | 20 to 21.5 | kHz |
| Output Current Accuracy | — | ±5 | % |
Design Notes
- Use a properly designed flyback transformer matched to the 100kHz switching frequency
- Keep high-current switching loops as short as possible to minimize EMI
- Select the external resistor carefully to set the desired operating current
- Provide sufficient PCB copper area for heat dissipation around the integrated POWERMOS
- Follow recommended snubber and clamp circuit designs to suppress transformer leakage spikes
Typical Circuit Usage
- Offline flyback AC-DC power supplies
- Wall adapters and battery chargers
- Standby power supply modules
- Set-top box power supplies
- TV auxiliary power supplies
- Small household appliance SMPS circuits
How to Choose This Part
- Select for low-power offline flyback converter applications
- Choose when an integrated 650V MOSFET reduces component count and PCB area
- Suitable for designs requiring low standby power consumption
- Ideal for applications needing comprehensive protection features without additional circuitry
- Verify transformer and output power requirements are compatible with the controller specifications
Applications
- AC-DC switching power supplies
- Power adapters
- Mobile device chargers
- LED driver power supplies
- Consumer electronics
- Home appliances
- Standby power supplies
- Industrial auxiliary power converters
Alternative / Equivalent Products
- TNY266PN
- TNY268PN
- VIPer22A
- FSQ0265RN
- FSDM0265RN
- OB2269
TM0265R PDF Datasheet
