Texas Instruments UC3844N, PWM Controller, 500 kHz 8-Pin, PDIP
- RS Stock No.:
- 9233842
- Mfr. Prt No.:
- UC3844N
- Brand:
- Texas Instruments
Technical Reference
Legislation and Compliance
RoHS Certificate of Compliance
EU Directives 2011/65/EU and 2015/863 restrict the use of the 10 substances below in the manufacture of specified types of electrical equipment.
Whilst this restriction does not legally apply to components, it is recognised that component “compliance” is relevant to many customers.
RS definition of RoHS Compliance:
- The product does not contain any of the restricted substances in concentrations and applications banned by the Directive,
- and for components, the product is capable of being worked on at the higher temperatures required by lead–free soldering
The restricted substances and maximum allowed concentrations in the homogenous material are, by weight:
| Substance | Concentration |
| Lead | 0.1% |
| Mercury | 0.1% |
| PBB (Polybrominated Biphenyls) | 0.1% |
| PBDE ( Polybrominated Diphenyl Ethers) | 0.1% |
| Hexavalent Chromium | 0.1% |
| Cadmium | 0.01% |
| DEHP (Bis (2-Ethylhexl) phthalate) | 0.1% |
| BBP (Benzyl butyl phthalate) | 0.1% |
| DBP (Dibutyl phthalate) | 0.1% |
| DIBP (Diisobutyl phthalate) | 0.1% |
The supplier of the item listed below has informed RS Components that the product is "RoHS Compliant".
RS Components has taken all reasonable steps to confirm this statement. Information relates only to products sold on or after the date of this certificate.
| RS stock number | 9233842 |
| Product description | Texas Instruments UC3844N, PWM Controller, 500 kHz 8-Pin, PDIP |
| Manufacturer / Brand | Texas Instruments |
| Manufacturer part number | UC3844N |
RS Components Ltd, Birchington Road, Corby, Northants, NN17 9RS, UK
Statement of Conformity
This statement confirms that the product detailed below complies with the specifications currently published in the RS media and has been subject to the strict quality conditions imposed by RS Components’ internal management systems. Furthermore and where applicable, it confirms that all relevant semiconductor devices have been handled and packed under conditions that meet the administrative and technical requirements of ANSI/ESD S20.20 and EN61340-5-1 electrostatics control standards.
| RS stock number | 9233842 |
| Product description | Texas Instruments UC3844N, PWM Controller, 500 kHz 8-Pin, PDIP |
| Manufacturer / Brand | Texas Instruments |
| Manufacturer part number | UC3844N |
The foregoing information relates to product sold on, or after, the date shown below.
RS COMPONENTS
| Date | Dec 26, 2024 |
RS Components Pte Ltd Robinson Road, P.O. Box 1582, Singapore 903132
Product Details
Flyback Controllers, Texas Instruments
Flyback Controller, Current Control, UC18/UC28/UC38 Series, Texas Instruments
The isolated-flyback power supply controller provides Constant-Voltage (CV) and Constant-Current (CC) output regulation to improve transient response to large load steps. Primary-Side Regulation (PSR) eliminates the need for an Optocoupler.
Current-Mode and Voltage-Mode PWM Controller
Primary-Side Regulation
Peak Power Mode
Low Power
Specifications
| Attribute | Value |
| Brand | Texas Instruments |
| Maximum Switching Frequency | 500 kHz |
| Output Current | 1 A |
| Number of Outputs | 1 |
| Control Method | Current |
| Fall Time | 50 ns |
| Mounting Type | Through Hole |
| Package Type | PDIP |
| Rise Time | 50 ns |
| Pin Count | 8 |
| Topology | Boost, Buck, Flyback, Forward |
| Dimensions | 9.81 x 6.35 x 4.57 mm |
| Maximum Duty Cycle | 50 % |
| Length | 9.81 mm |
| PWM Controller Type | Current Mode |
| Width | 6.35 mm |
| Height | 4.57 mm |
| Maximum Operating Temperature | +70 °C |
| Minimum Operating Temperature | 0 °C |