TM0265 PDF – Off-line Switching Power Supply Current

Part Number : TM0265, TMO265

Function : Off-line switching power supply current mode control circuit

Package : DIP 8 Pin

Manufactures : Titan Micro Electronics

Images :

TM0265 datasheet

1 page
TM0265 image

2 page

Description :

The chip integrates a high-voltage POWER MOS to meet the requirements of low power consumption. In standby mode, reduce the power consumption by reducing the operating frequency and output a stable operating voltage. The frequency reduction is limited to below 20KHz/21.5KHz to avoid audio noise. In failure modes such as open loop, overvoltage, or overload caused by short circuit, the chip switches the chip to restart mode through an internal protection circuit. Through internal precision current peak control, the size of the transformer and the secondary diode can be made smaller, thereby reducing the cost of the entire system.- […]


TM0265 pinout


1. Integrated 650v high voltage POWERMOS device
2. User-defined soft start to reduce starting shock
3. Working current can be adjusted by external resistance
4. Input undervoltage protection
5. Built-in overheat protection
6. Built-in overload protection and open loop protection
7. Automatic restart, overvoltage protection during automatic restart
8. Frequency adjustment to reduce EMI
9. 100KHz switching frequency, maximum duty ratio 72%
10. Low-power standby mode to meet EU requirements
11. Simple application circuit design
12. Tolerance of output current <±5%

3 page

TM0265 Datasheet

LM234D Datasheet PDF – Adjustable Current Sources

Part Number : LM234D

Function : Three terminal adjustable current sources

Package : TO-92, SO-8

Manufacturers : STMicroelectronics

Pinouts :

LM234D datasheet


Description :

The LM134/LM234/LM334 are 3-terminal adjustable current sources characterized by :

1. an operating current range of 10000: 1
2. an excellent current regulation
3. a wide dynamic voltage range of 1V t 10V

The current is determined by an external resistor without requiring other external components.
Reverse voltages of up to 20V will only draw a current of several microamperes. This enables the
circuit to operate as a rectifier and as a source of  current in a.c. applications.


1. Operates from 1V to 40V
2. 0.02%/V current regulation
3. Programmable from 1μA to 10mA
4. ±3% initial accuracy

Other data sheets within the file : LM134, LM134Z, LM234

LM234D Datasheet PDF Download

LM234D pdf